Examples with MetaDataManager org.datanucleus.metadata.MetaDataManager used on opensource projects

Example 46 with MetaDataManager

use of org.datanucleus.metadata.MetaDataManager in project datanucleus-api-jdo by datanucleus.

the class NucleusJDOHelper method getMetaDataForClass.

// ------------------------------------ MetaData --------------------------------
/**
 * Accessor for the MetaData for the specified class
 * @param pmf PersistenceManager factory
 * @param cls The class
 * @return The MetaData for the class
 */
public static ClassMetaData getMetaDataForClass(PersistenceManagerFactory pmf, Class cls) {
    if (pmf == null || cls == null) {
        return null;
    }
    if (!(pmf instanceof JDOPersistenceManagerFactory)) {
        return null;
    }
    JDOPersistenceManagerFactory myPMF = (JDOPersistenceManagerFactory) pmf;
    MetaDataManager mdmgr = myPMF.getNucleusContext().getMetaDataManager();
    return (ClassMetaData) mdmgr.getMetaDataForClass(cls, myPMF.getNucleusContext().getClassLoaderResolver(null));
}

Example 47 with MetaDataManager

use of org.datanucleus.metadata.MetaDataManager in project datanucleus-api-jdo by datanucleus.

the class JDOPersistenceManagerFactory method unmanageClass.

/**
 * Method to remove the specified class from the classes that are being managed.
 * In practical terms this means remove all knowledge of the class from the metadata service, and also from
 * the StoreManager service. It doesn't mean to remove the datastore representation (i.e table) of this class.
 * @param className Name of the class
 */
public void unmanageClass(String className) {
    // Unload the metadata for this class
    MetaDataManager mmgr = nucleusContext.getMetaDataManager();
    mmgr.unloadMetaDataForClass(className);
    // Unmanage from the store
    nucleusContext.getStoreManager().unmanageClass(nucleusContext.getClassLoaderResolver(null), className, false);
}

Example 48 with MetaDataManager

use of org.datanucleus.metadata.MetaDataManager in project datanucleus-rdbms by datanucleus.

the class SQLStatementHelper method selectMemberOfSourceInStatement.

/**
 * Method to select the specified member (field/property) of the source table in the passed SQL
 * statement. This populates the mappingDefinition with the column details for this member.
 * @param stmt The SQL statement
 * @param mappingDefinition Mapping definition for the results (will be populated by any
 *                          selected mappings if provided as input)
 * @param fetchPlan FetchPlan
 * @param sourceSqlTbl Table that has the member (or a super-table/secondary-table of this table)
 * @param mmd Meta-data for the field/property in the source that we are selecting
 * @param clr ClassLoader resolver
 * @param maxFetchPlanLimit Max fetch depth from this point to select (0 implies no other objects)
 * @param inputJoinType Optional join type to use for subobjects (otherwise decide join type internally)
 */
public static void selectMemberOfSourceInStatement(SelectStatement stmt, StatementClassMapping mappingDefinition, FetchPlan fetchPlan, SQLTable sourceSqlTbl, AbstractMemberMetaData mmd, ClassLoaderResolver clr, int maxFetchPlanLimit, JoinType inputJoinType) {
    boolean selectSubobjects = false;
    if (maxFetchPlanLimit > 0) {
        selectSubobjects = true;
    }
    // Set table-group name for any related object we join to (naming based on member name)
    String tableGroupName = sourceSqlTbl.getGroupName() + "." + mmd.getName();
    JavaTypeMapping m = sourceSqlTbl.getTable().getMemberMapping(mmd);
    if (m != null && m.includeInFetchStatement()) {
        RelationType relationType = mmd.getRelationType(clr);
        RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
        DatastoreAdapter dba = storeMgr.getDatastoreAdapter();
        if (!dba.validToSelectMappingInStatement(stmt, m)) {
            // Not valid to select this mapping for this statement so return
            return;
        }
        MetaDataManager mmgr = storeMgr.getMetaDataManager();
        StatementMappingIndex stmtMapping = new StatementMappingIndex(m);
        if (m.getNumberOfDatastoreMappings() > 0) {
            // Select of fields with columns in source table(s)
            // Adds inner/outer join to any required superclass/secondary tables
            SQLTable sqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(stmt, sourceSqlTbl, m);
            boolean selectFK = true;
            if (selectSubobjects && (relationType == RelationType.ONE_TO_ONE_UNI || (relationType == RelationType.ONE_TO_ONE_BI && mmd.getMappedBy() == null)) && !mmd.isSerialized() && !mmd.isEmbedded()) {
                // Related object with FK at this side
                selectFK = selectFetchPlanFieldsOfFKRelatedObject(stmt, mappingDefinition, fetchPlan, sourceSqlTbl, mmd, clr, maxFetchPlanLimit, m, tableGroupName, stmtMapping, sqlTbl, inputJoinType);
            } else if (selectSubobjects && (!mmd.isEmbedded() && !mmd.isSerialized()) && relationType == RelationType.MANY_TO_ONE_BI) {
                AbstractMemberMetaData[] relatedMmds = mmd.getRelatedMemberMetaData(clr);
                if (mmd.getJoinMetaData() != null || relatedMmds[0].getJoinMetaData() != null) {
                    // N-1 bidirectional join table relation
                    // TODO Add left outer join from {sourceTable}.ID to {joinTable}.ELEM_FK
                    Table joinTable = storeMgr.getTable(relatedMmds[0]);
                    DatastoreElementContainer collTable = (DatastoreElementContainer) joinTable;
                    JavaTypeMapping selectMapping = collTable.getOwnerMapping();
                    SQLTable joinSqlTbl = null;
                    if (stmt.getPrimaryTable().getTable() != joinTable) {
                        // Join to the join table
                        JavaTypeMapping referenceMapping = collTable.getElementMapping();
                        joinSqlTbl = stmt.join(JoinType.LEFT_OUTER_JOIN, sourceSqlTbl, sourceSqlTbl.getTable().getIdMapping(), collTable, null, referenceMapping, null, tableGroupName, true);
                    } else {
                        // Main table of the statement is the join table so no need to join
                        joinSqlTbl = stmt.getPrimaryTable();
                    }
                    // Select the owner mapping of the join table
                    int[] colNumbers = stmt.select(joinSqlTbl, selectMapping, null);
                    stmtMapping.setColumnPositions(colNumbers);
                // TODO Join to 1 side from join table?
                } else {
                    // N-1 bidirectional FK relation
                    // Related object with FK at this side, so join/select related object as required
                    selectFK = selectFetchPlanFieldsOfFKRelatedObject(stmt, mappingDefinition, fetchPlan, sourceSqlTbl, mmd, clr, maxFetchPlanLimit, m, tableGroupName, stmtMapping, sqlTbl, inputJoinType);
                }
            }
            if (selectFK) {
                int[] colNumbers = stmt.select(sqlTbl, m, null);
                stmtMapping.setColumnPositions(colNumbers);
            }
        } else {
            // Select of related objects with FK in other table
            if (relationType == RelationType.ONE_TO_ONE_BI && mmd.getMappedBy() != null) {
                // 1-1 bidirectional relation with FK in related table
                AbstractMemberMetaData[] relatedMmds = mmd.getRelatedMemberMetaData(clr);
                AbstractMemberMetaData relatedMmd = relatedMmds[0];
                String[] clsNames = null;
                if (mmd.getType().isInterface()) {
                    if (mmd.getFieldTypes() != null && mmd.getFieldTypes().length == 1) {
                        // Use field-type since only one class specified
                        Class fldTypeCls = clr.classForName(mmd.getFieldTypes()[0]);
                        if (fldTypeCls.isInterface()) {
                            // User has specified an interface, so find its implementations
                            clsNames = mmgr.getClassesImplementingInterface(mmd.getFieldTypes()[0], clr);
                        } else {
                            // Use user-provided field-type
                            clsNames = new String[] { mmd.getFieldTypes()[0] };
                        }
                    }
                    if (clsNames == null) {
                        clsNames = mmgr.getClassesImplementingInterface(mmd.getTypeName(), clr);
                    }
                } else {
                    String typeName = mmd.isSingleCollection() ? mmd.getCollection().getElementType() : mmd.getTypeName();
                    clsNames = new String[] { typeName };
                }
                DatastoreClass relatedTbl = storeMgr.getDatastoreClass(clsNames[0], clr);
                JavaTypeMapping relatedMapping = relatedTbl.getMemberMapping(relatedMmd);
                JavaTypeMapping relatedDiscrimMapping = relatedTbl.getSurrogateMapping(SurrogateColumnType.DISCRIMINATOR, true);
                Object[] discrimValues = null;
                JavaTypeMapping relatedTypeMapping = null;
                AbstractClassMetaData relatedCmd = relatedMmd.getAbstractClassMetaData();
                if (relatedDiscrimMapping != null && (relatedCmd.getSuperAbstractClassMetaData() != null || !relatedCmd.getFullClassName().equals(mmd.getTypeName()))) {
                    // Related table has a discriminator and the field can store other types
                    List discValueList = null;
                    for (String clsName : clsNames) {
                        List values = getDiscriminatorValuesForMember(clsName, relatedDiscrimMapping, storeMgr, clr);
                        if (discValueList == null) {
                            discValueList = values;
                        } else {
                            discValueList.addAll(values);
                        }
                    }
                    if (discValueList != null) {
                        discrimValues = discValueList.toArray(new Object[discValueList.size()]);
                    }
                } else if (relatedTbl != relatedMapping.getTable()) {
                    // The relation is to a base class table, and the type stored is a sub-class
                    relatedTypeMapping = relatedTbl.getIdMapping();
                }
                SQLTable relatedSqlTbl = null;
                if (relatedTypeMapping == null) {
                    // Join the 1-1 relation
                    JoinType joinType = getJoinTypeForOneToOneRelationJoin(sourceSqlTbl.getTable().getIdMapping(), sourceSqlTbl, inputJoinType);
                    if (joinType == JoinType.LEFT_OUTER_JOIN || joinType == JoinType.RIGHT_OUTER_JOIN) {
                        inputJoinType = joinType;
                    }
                    relatedSqlTbl = addJoinForOneToOneRelation(stmt, sourceSqlTbl.getTable().getIdMapping(), sourceSqlTbl, relatedMapping, relatedTbl, null, discrimValues, tableGroupName, joinType);
                    // Select the id mapping in the related table
                    int[] colNumbers = stmt.select(relatedSqlTbl, relatedTbl.getIdMapping(), null);
                    stmtMapping.setColumnPositions(colNumbers);
                } else {
                    DatastoreClass relationTbl = (DatastoreClass) relatedMapping.getTable();
                    if (relatedTbl != relatedMapping.getTable()) {
                        if (relatedMapping.isNullable()) {
                            // Nullable - left outer join from {sourceTable}.ID to {relatedBaseTable}.FK
                            // and inner join from {relatedBaseTable}.ID to {relatedTable}.ID
                            // (joins the relation and restricts to the right type)
                            relatedSqlTbl = stmt.join(JoinType.LEFT_OUTER_JOIN, sourceSqlTbl, sourceSqlTbl.getTable().getIdMapping(), relatedMapping.getTable(), null, relatedMapping, null, tableGroupName, true);
                            relatedSqlTbl = stmt.join(JoinType.INNER_JOIN, relatedSqlTbl, relatedMapping.getTable().getIdMapping(), relatedTbl, null, relatedTbl.getIdMapping(), null, tableGroupName, true);
                        } else {
                            // Not nullable - inner join from {sourceTable}.ID to {relatedBaseTable}.FK
                            // and inner join from {relatedBaseTable}.ID to {relatedTable}.ID
                            // (joins the relation and restricts to the right type)
                            relatedSqlTbl = stmt.join(JoinType.INNER_JOIN, sourceSqlTbl, sourceSqlTbl.getTable().getIdMapping(), relatedMapping.getTable(), null, relatedMapping, null, tableGroupName, true);
                            relatedSqlTbl = stmt.join(JoinType.INNER_JOIN, relatedSqlTbl, relatedMapping.getTable().getIdMapping(), relatedTbl, null, relatedTbl.getIdMapping(), null, tableGroupName, true);
                        }
                    } else {
                        // Join the 1-1 relation
                        JoinType joinType = getJoinTypeForOneToOneRelationJoin(sourceSqlTbl.getTable().getIdMapping(), sourceSqlTbl, inputJoinType);
                        if (joinType == JoinType.LEFT_OUTER_JOIN || joinType == JoinType.RIGHT_OUTER_JOIN) {
                            inputJoinType = joinType;
                        }
                        relatedSqlTbl = addJoinForOneToOneRelation(stmt, sourceSqlTbl.getTable().getIdMapping(), sourceSqlTbl, relatedMapping, relationTbl, null, null, tableGroupName, joinType);
                    }
                    // Select the id mapping in the subclass of the related table
                    // Note this adds an inner join from relatedTable to its subclass
                    relatedSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(stmt, relatedSqlTbl, relatedTbl.getIdMapping());
                    int[] colNumbers = stmt.select(relatedSqlTbl, relatedTbl.getIdMapping(), null);
                    stmtMapping.setColumnPositions(colNumbers);
                }
                if (selectSubobjects && !mmd.isSerialized() && !mmd.isEmbedded()) {
                    // Select the fetch-plan fields of the related object
                    StatementClassMapping subMappingDefinition = new StatementClassMapping(null, mmd.getName());
                    selectFetchPlanOfSourceClassInStatement(stmt, subMappingDefinition, fetchPlan, relatedSqlTbl, relatedMmd.getAbstractClassMetaData(), maxFetchPlanLimit - 1, inputJoinType);
                    if (mappingDefinition != null) {
                        mappingDefinition.addMappingDefinitionForMember(mmd.getAbsoluteFieldNumber(), subMappingDefinition);
                    }
                }
            } else if (relationType == RelationType.MANY_TO_ONE_BI) {
                AbstractMemberMetaData[] relatedMmds = mmd.getRelatedMemberMetaData(clr);
                if (mmd.getJoinMetaData() != null || relatedMmds[0].getJoinMetaData() != null) {
                    // N-1 bidirectional join table relation
                    // Add left outer join from {sourceTable}.ID to {joinTable}.ELEM_FK
                    Table joinTable = storeMgr.getTable(relatedMmds[0]);
                    DatastoreElementContainer collTable = (DatastoreElementContainer) joinTable;
                    JavaTypeMapping selectMapping = collTable.getOwnerMapping();
                    SQLTable joinSqlTbl = null;
                    if (stmt.getPrimaryTable().getTable() != joinTable) {
                        // Join to the join table
                        JavaTypeMapping referenceMapping = collTable.getElementMapping();
                        if (referenceMapping instanceof ReferenceMapping) {
                            // Join table has a reference mapping pointing to our table, so get the submapping for the implementation
                            ReferenceMapping refMap = (ReferenceMapping) referenceMapping;
                            Class implType = clr.classForName(mmd.getClassName(true));
                            referenceMapping = refMap.getJavaTypeMappingForType(implType);
                        }
                        joinSqlTbl = stmt.join(JoinType.LEFT_OUTER_JOIN, sourceSqlTbl, sourceSqlTbl.getTable().getIdMapping(), collTable, null, referenceMapping, null, tableGroupName + "_JOIN", true);
                    } else {
                        // Main table of the statement is the join table so no need to join
                        joinSqlTbl = stmt.getPrimaryTable();
                    }
                    // Select the owner mapping of the join table
                    int[] colNumbers = stmt.select(joinSqlTbl, selectMapping, null);
                    stmtMapping.setColumnPositions(colNumbers);
                }
            // TODO Select fetch plan fields of this related object
            } else if (relationType == RelationType.MANY_TO_ONE_UNI) {
                // Add left outer join from {sourceTable}.ID to {joinTable}.OWNER_FK
                PersistableJoinTable joinTable = (PersistableJoinTable) storeMgr.getTable(mmd);
                SQLTable joinSqlTbl = stmt.join(JoinType.LEFT_OUTER_JOIN, sourceSqlTbl, sourceSqlTbl.getTable().getIdMapping(), joinTable, null, joinTable.getOwnerMapping(), null, tableGroupName + "_JOIN", true);
                int[] colNumbers = stmt.select(joinSqlTbl, joinTable.getRelatedMapping(), null);
                stmtMapping.setColumnPositions(colNumbers);
            // TODO Select fetch plan fields of this related object
            }
        }
        if (mappingDefinition != null) {
            mappingDefinition.addMappingForMember(mmd.getAbsoluteFieldNumber(), stmtMapping);
        }
    }
}

Example 49 with MetaDataManager

use of org.datanucleus.metadata.MetaDataManager in project datanucleus-rdbms by datanucleus.

the class QueryToSQLMapper method compileFromClassExpression.

/**
 * Method to take a ClassExpression (in a FROM clause) and process the candidate and any
 * linked JoinExpression(s), adding joins to the SQLStatement as required.
 * @param clsExpr The ClassExpression
 */
protected void compileFromClassExpression(ClassExpression clsExpr) {
    Symbol clsExprSym = clsExpr.getSymbol();
    Class baseCls = (clsExprSym != null ? clsExprSym.getValueType() : null);
    SQLTable candSqlTbl = stmt.getPrimaryTable();
    MetaDataManager mmgr = storeMgr.getMetaDataManager();
    AbstractClassMetaData cmd = mmgr.getMetaDataForClass(baseCls, clr);
    if (baseCls != null && !candidateAlias.equals(clsExpr.getAlias())) {
        // Not candidate class so must be cross join (JPA spec 4.4.5)
        DatastoreClass candTbl = storeMgr.getDatastoreClass(baseCls.getName(), clr);
        candSqlTbl = stmt.join(JoinType.CROSS_JOIN, null, null, null, candTbl, clsExpr.getAlias(), null, null, null, null, true, null);
        SQLTableMapping tblMapping = new SQLTableMapping(candSqlTbl, cmd, candTbl.getIdMapping());
        setSQLTableMappingForAlias(clsExpr.getAlias(), tblMapping);
    }
    if (clsExpr.getCandidateExpression() != null && parentMapper != null) {
        // User defined the candidate of the subquery as an implied join to the outer query
        // e.g SELECT c FROM Customer c WHERE EXISTS (SELECT o FROM c.orders o ...)
        // so add the join(s) to the outer query
        processFromClauseSubquery(clsExpr, candSqlTbl, mmgr);
    }
    // Process all linked JoinExpression(s) for this ClassExpression
    Expression rightExpr = clsExpr.getRight();
    SQLTable sqlTbl = candSqlTbl;
    JavaTypeMapping previousMapping = null;
    while (rightExpr != null) {
        if (rightExpr instanceof JoinExpression) {
            JoinExpression joinExpr = (JoinExpression) rightExpr;
            JoinExpression.JoinType exprJoinType = joinExpr.getType();
            JoinType joinType = org.datanucleus.store.rdbms.sql.SQLJoin.getJoinTypeForJoinExpressionType(exprJoinType);
            Expression joinedExpr = joinExpr.getJoinedExpression();
            Expression joinOnExpr = joinExpr.getOnExpression();
            String joinAlias = joinExpr.getAlias();
            PrimaryExpression joinPrimExpr = null;
            Class castCls = null;
            if (joinedExpr instanceof PrimaryExpression) {
                joinPrimExpr = (PrimaryExpression) joinedExpr;
            } else if (joinedExpr instanceof DyadicExpression && joinedExpr.getOperator() == Expression.OP_CAST) {
                // TREAT this join as a particular type. Cast type is processed below where we add the joins
                joinPrimExpr = (PrimaryExpression) joinedExpr.getLeft();
                String castClassName = (String) ((Literal) joinedExpr.getRight()).getLiteral();
                castCls = clr.classForName(castClassName);
            } else {
                throw new NucleusException("We do not currently support JOIN to " + joinedExpr);
            }
            Iterator<String> iter = joinPrimExpr.getTuples().iterator();
            String rootId = iter.next();
            if (joinPrimExpr.getTuples().size() == 1 && !rootId.endsWith("#KEY") && !rootId.endsWith("#VALUE")) {
                // DN Extension : Join to (new) root element? We need an ON expression to be supplied in this case
                if (joinOnExpr == null) {
                    throw new NucleusUserException("Query has join to " + joinPrimExpr.getId() + " yet this is a root component and there is no ON expression");
                }
                // Add the basic join first with no condition since this root will be referenced in the "on" condition
                baseCls = resolveClass(joinPrimExpr.getId());
                DatastoreClass baseTbl = storeMgr.getDatastoreClass(baseCls.getName(), clr);
                sqlTbl = stmt.join(joinType, candSqlTbl, baseTbl, joinAlias, null, null, true);
                cmd = mmgr.getMetaDataForClass(baseCls, clr);
                SQLTableMapping tblMapping = new SQLTableMapping(sqlTbl, cmd, baseTbl.getIdMapping());
                setSQLTableMappingForAlias(joinAlias, tblMapping);
                // Convert the ON expression to a BooleanExpression and add to the join
                processingOnClause = true;
                joinOnExpr.evaluate(this);
                BooleanExpression joinOnSqlExpr = (BooleanExpression) stack.pop();
                processingOnClause = false;
                stmt.addAndConditionToJoinForTable(sqlTbl, joinOnSqlExpr, true);
                // Move on to next join in the chain
                rightExpr = rightExpr.getRight();
                continue;
            }
            String joinTableGroupName = null;
            SQLTable tblMappingSqlTbl = null;
            JavaTypeMapping tblIdMapping = null;
            AbstractMemberMetaData tblMmd = null;
            boolean mapKey = false;
            boolean mapValue = false;
            String rootComponent = rootId;
            if (rootComponent.endsWith("#KEY")) {
                mapKey = true;
                rootComponent = rootComponent.substring(0, rootComponent.length() - 4);
            } else if (rootComponent.endsWith("#VALUE")) {
                mapValue = true;
                rootComponent = rootComponent.substring(0, rootComponent.length() - 6);
            }
            if (rootComponent.equalsIgnoreCase(candidateAlias)) {
                // Join relative to the candidate
                // Name table group of joined-to as per the relation
                // Note : this will only work for one level out from the candidate TODO Extend this
                cmd = candidateCmd;
                joinTableGroupName = joinPrimExpr.getId();
                sqlTbl = candSqlTbl;
            } else {
                // Join relative to some other alias
                SQLTableMapping sqlTblMapping = getSQLTableMappingForAlias(rootComponent);
                if (sqlTblMapping != null) {
                    if (sqlTblMapping.mmd != null && (mapKey || mapValue)) {
                        // First component is Map-related (i.e m#KEY, m#VALUE), so add any necessary join(s)
                        MapMetaData mapmd = sqlTblMapping.mmd.getMap();
                        cmd = mapKey ? mapmd.getKeyClassMetaData(clr) : mapmd.getValueClassMetaData(clr);
                        // Find the table forming the Map. This may be a join table, or the key or value depending on the type
                        // TODO Use OPTION_CASE_INSENSITIVE
                        sqlTbl = stmt.getTable(rootComponent + "_MAP");
                        if (sqlTbl == null) {
                            sqlTbl = stmt.getTable((rootComponent + "_MAP").toUpperCase());
                            if (sqlTbl == null) {
                                sqlTbl = stmt.getTable((rootComponent + "_MAP").toLowerCase());
                            }
                        }
                        String aliasForJoin = (iter.hasNext()) ? null : joinAlias;
                        boolean embedded = mapKey ? (mapmd.isEmbeddedKey() || mapmd.isSerializedKey()) : (mapmd.isEmbeddedValue() || mapmd.isSerializedValue());
                        if (mapmd.getMapType() == MapType.MAP_TYPE_JOIN) {
                            // Join from join table to KEY/VALUE as required
                            if (!embedded) {
                                if (mapKey) {
                                    DatastoreClass keyTable = storeMgr.getDatastoreClass(mapmd.getKeyType(), clr);
                                    sqlTbl = stmt.join(joinType, sqlTbl, ((MapTable) sqlTbl.getTable()).getKeyMapping(), keyTable, aliasForJoin, keyTable.getIdMapping(), null, joinTableGroupName, true);
                                } else {
                                    DatastoreClass valueTable = storeMgr.getDatastoreClass(mapmd.getValueType(), clr);
                                    sqlTbl = stmt.join(joinType, sqlTbl, ((MapTable) sqlTbl.getTable()).getValueMapping(), valueTable, aliasForJoin, valueTable.getIdMapping(), null, joinTableGroupName, true);
                                }
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                            }
                        } else if (mapmd.getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
                        // TODO Cater for this type
                        } else if (mapmd.getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
                        // TODO Cater for this type
                        }
                    } else {
                        cmd = sqlTblMapping.cmd;
                        sqlTbl = sqlTblMapping.table;
                    }
                    joinTableGroupName = sqlTbl.getGroupName() + joinPrimExpr.getId().substring(rootComponent.length());
                } else {
                    throw new NucleusUserException("Query has " + joinPrimExpr.getId() + " yet the first component " + rootComponent + " is unknown!");
                }
            }
            while (iter.hasNext()) {
                String id = iter.next();
                String[] ids = id.contains(".") ? StringUtils.split(id, ".") : new String[] { id };
                for (int k = 0; k < ids.length; k++) {
                    if (cmd == null) {
                        throw new NucleusUserException("Error in JOIN clause. id=" + id + " but component prior to " + ids[k] + " has no metadata");
                    }
                    boolean lastComponent = (k == ids.length - 1);
                    String thisComponent = ids[k];
                    mapKey = false;
                    mapValue = false;
                    if (thisComponent.endsWith("#KEY")) {
                        thisComponent = thisComponent.substring(0, thisComponent.length() - 4);
                        mapKey = true;
                    } else if (thisComponent.endsWith("#VALUE")) {
                        thisComponent = thisComponent.substring(0, thisComponent.length() - 6);
                        mapValue = true;
                    }
                    AbstractMemberMetaData mmd = cmd.getMetaDataForMember(thisComponent);
                    if (mmd == null) {
                        if (exprJoinType == JoinExpression.JoinType.JOIN_LEFT_OUTER || exprJoinType == JoinExpression.JoinType.JOIN_LEFT_OUTER_FETCH) {
                            // Polymorphic join, where the field exists in a subclass (doable since we have outer join)
                            String[] subclasses = mmgr.getSubclassesForClass(cmd.getFullClassName(), true);
                            for (int l = 0; l < subclasses.length; l++) {
                                AbstractClassMetaData subCmd = mmgr.getMetaDataForClass(subclasses[l], clr);
                                if (subCmd != null) {
                                    mmd = subCmd.getMetaDataForMember(thisComponent);
                                    if (mmd != null) {
                                        cmd = subCmd;
                                        break;
                                    }
                                }
                            }
                        }
                        if (mmd == null) {
                            throw new NucleusUserException("Query has " + joinPrimExpr.getId() + " yet " + thisComponent + " is not found. Fix your input");
                        }
                    }
                    tblMmd = null;
                    String aliasForJoin = null;
                    if (k == (ids.length - 1) && !iter.hasNext()) {
                        aliasForJoin = joinAlias;
                    }
                    RelationType relationType = mmd.getRelationType(clr);
                    DatastoreClass relTable = null;
                    AbstractMemberMetaData relMmd = null;
                    if (relationType != RelationType.NONE) {
                        if (JoinExpression.JoinType.isFetch(exprJoinType)) {
                            // Add field to FetchPlan since marked for FETCH
                            String fgName = "QUERY_FETCH_" + mmd.getFullFieldName();
                            FetchGroupManager fetchGrpMgr = storeMgr.getNucleusContext().getFetchGroupManager();
                            if (fetchGrpMgr.getFetchGroupsWithName(fgName) == null) {
                                FetchGroup grp = new FetchGroup(storeMgr.getNucleusContext(), fgName, clr.classForName(cmd.getFullClassName()));
                                grp.addMember(mmd.getName());
                                fetchGrpMgr.addFetchGroup(grp);
                            }
                            fetchPlan.addGroup(fgName);
                        }
                    }
                    if (relationType == RelationType.ONE_TO_ONE_UNI) {
                        JavaTypeMapping otherMapping = null;
                        Object[] castDiscrimValues = null;
                        if (castCls != null && lastComponent) {
                            cmd = mmgr.getMetaDataForClass(castCls, clr);
                            if (cmd.hasDiscriminatorStrategy()) {
                                // Restrict discriminator on cast type to be the type+subclasses
                                castDiscrimValues = getDiscriminatorValuesForCastClass(cmd);
                            }
                        } else {
                            cmd = mmgr.getMetaDataForClass(mmd.getType(), clr);
                        }
                        if (mmd.isEmbedded()) {
                            // Embedded into the same table as before, so no join needed
                            otherMapping = sqlTbl.getTable().getMemberMapping(mmd);
                        } else {
                            if (sqlTbl.getTable() instanceof CollectionTable) {
                                // Currently in a join table, so work from the element and this being an embedded member
                                CollectionTable collTbl = (CollectionTable) sqlTbl.getTable();
                                JavaTypeMapping elemMapping = collTbl.getElementMapping();
                                if (elemMapping instanceof EmbeddedMapping) {
                                    otherMapping = ((EmbeddedMapping) elemMapping).getJavaTypeMapping(mmd.getName());
                                }
                            } else {
                                otherMapping = sqlTbl.getTable().getMemberMapping(mmd);
                            }
                            relTable = storeMgr.getDatastoreClass(mmd.getTypeName(), clr);
                            if (otherMapping == null && previousMapping != null) {
                                if (previousMapping instanceof EmbeddedMapping) {
                                    // Part of an embedded 1-1 object, so find the relevant member mapping
                                    EmbeddedMapping embMapping = (EmbeddedMapping) previousMapping;
                                    otherMapping = embMapping.getJavaTypeMapping(mmd.getName());
                                }
                            }
                            if (otherMapping == null) {
                                // Polymorphic join? : cannot find this member in the candidate of the main statement, so need to pick which UNION
                                String tblGroupName = sqlTbl.getGroupName();
                                SQLTableGroup grp = stmt.getTableGroup(tblGroupName);
                                SQLTable nextSqlTbl = null;
                                // Try to find subtable in the same group that has a mapping for this member (and join from that)
                                SQLTable[] grpTbls = grp.getTables();
                                for (SQLTable grpTbl : grpTbls) {
                                    if (grpTbl.getTable().getMemberMapping(mmd) != null) {
                                        otherMapping = grpTbl.getTable().getMemberMapping(mmd);
                                        break;
                                    }
                                }
                                SQLTable newSqlTbl = stmt.join(joinType, sqlTbl, otherMapping, relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, false);
                                if (newSqlTbl != null) {
                                    nextSqlTbl = newSqlTbl;
                                }
                                if (stmt instanceof SelectStatement) {
                                    List<SelectStatement> unionStmts = ((SelectStatement) stmt).getUnions();
                                    if (unionStmts != null) {
                                        for (SQLStatement unionStmt : unionStmts) {
                                            // Repeat the process for any unioned statements, find a subtable in the same group (and join from that)
                                            otherMapping = null;
                                            grp = unionStmt.getTableGroup(tblGroupName);
                                            SQLTable[] unionGrpTbls = grp.getTables();
                                            for (SQLTable grpTbl : unionGrpTbls) {
                                                if (grpTbl.getTable().getMemberMapping(mmd) != null) {
                                                    otherMapping = grpTbl.getTable().getMemberMapping(mmd);
                                                    break;
                                                }
                                            }
                                            newSqlTbl = unionStmt.join(joinType, sqlTbl, otherMapping, relTable, aliasForJoin, relTable.getIdMapping(), castDiscrimValues, joinTableGroupName, false);
                                            if (newSqlTbl != null) {
                                                nextSqlTbl = newSqlTbl;
                                            }
                                        }
                                    }
                                }
                                sqlTbl = nextSqlTbl;
                            } else {
                                sqlTbl = stmt.join(joinType, sqlTbl, otherMapping, relTable, aliasForJoin, relTable.getIdMapping(), castDiscrimValues, joinTableGroupName, true);
                            }
                        }
                        previousMapping = otherMapping;
                        tblIdMapping = sqlTbl.getTable().getIdMapping();
                        tblMappingSqlTbl = sqlTbl;
                    } else if (relationType == RelationType.ONE_TO_ONE_BI) {
                        JavaTypeMapping otherMapping = null;
                        Object[] castDiscrimValues = null;
                        if (castCls != null && lastComponent) {
                            cmd = mmgr.getMetaDataForClass(castCls, clr);
                            if (cmd.hasDiscriminatorStrategy()) {
                                // Restrict discriminator on cast type to be the type+subclasses
                                castDiscrimValues = getDiscriminatorValuesForCastClass(cmd);
                            }
                        } else {
                            cmd = mmgr.getMetaDataForClass(mmd.getType(), clr);
                        }
                        if (mmd.isEmbedded()) {
                            // Embedded into the same table as before, so no join needed
                            otherMapping = sqlTbl.getTable().getMemberMapping(mmd);
                        } else {
                            relTable = storeMgr.getDatastoreClass(mmd.getTypeName(), clr);
                            if (mmd.getMappedBy() != null) {
                                relMmd = mmd.getRelatedMemberMetaData(clr)[0];
                                JavaTypeMapping relMapping = relTable.getMemberMapping(relMmd);
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), relTable, aliasForJoin, relMapping, castDiscrimValues, joinTableGroupName, true);
                            } else {
                                if (sqlTbl.getTable() instanceof CollectionTable) {
                                    // Currently in a join table, so work from the element and this being an embedded member
                                    CollectionTable collTbl = (CollectionTable) sqlTbl.getTable();
                                    JavaTypeMapping elemMapping = collTbl.getElementMapping();
                                    if (elemMapping instanceof EmbeddedMapping) {
                                        otherMapping = ((EmbeddedMapping) elemMapping).getJavaTypeMapping(mmd.getName());
                                    }
                                } else {
                                    otherMapping = sqlTbl.getTable().getMemberMapping(mmd);
                                }
                                if (otherMapping == null && previousMapping != null) {
                                    if (previousMapping instanceof EmbeddedMapping) {
                                        // Part of an embedded 1-1 object, so find the relevant member mapping
                                        EmbeddedMapping embMapping = (EmbeddedMapping) previousMapping;
                                        otherMapping = embMapping.getJavaTypeMapping(mmd.getName());
                                    }
                                }
                                sqlTbl = stmt.join(joinType, sqlTbl, otherMapping, relTable, aliasForJoin, relTable.getIdMapping(), castDiscrimValues, joinTableGroupName, true);
                            }
                        }
                        previousMapping = otherMapping;
                        tblIdMapping = sqlTbl.getTable().getIdMapping();
                        tblMappingSqlTbl = sqlTbl;
                    } else if (relationType == RelationType.ONE_TO_MANY_BI) {
                        previousMapping = null;
                        if (mmd.hasCollection()) {
                            // Join across COLLECTION relation
                            cmd = mmd.getCollection().getElementClassMetaData(clr);
                            if (mmd.getCollection().isEmbeddedElement() && mmd.getJoinMetaData() != null) {
                                // Embedded element stored in (collection) join table
                                CollectionTable relEmbTable = (CollectionTable) storeMgr.getTable(mmd);
                                JavaTypeMapping relOwnerMapping = relEmbTable.getOwnerMapping();
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), relEmbTable, aliasForJoin, relOwnerMapping, null, joinTableGroupName, true);
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = relEmbTable.getElementMapping();
                            } else {
                                relTable = storeMgr.getDatastoreClass(mmd.getCollection().getElementType(), clr);
                                relMmd = mmd.getRelatedMemberMetaData(clr)[0];
                                if (mmd.getJoinMetaData() != null || relMmd.getJoinMetaData() != null) {
                                    // Join to join table, then to related table
                                    ElementContainerTable joinTbl = (ElementContainerTable) storeMgr.getTable(mmd);
                                    SQLTable joinSqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, null, joinTbl.getOwnerMapping(), null, null, true);
                                    sqlTbl = stmt.join(joinType, joinSqlTbl, joinTbl.getElementMapping(), relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                } else {
                                    // Join to related table FK
                                    sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), relTable, aliasForJoin, relTable.getMemberMapping(relMmd), null, joinTableGroupName, true);
                                }
                                tblIdMapping = sqlTbl.getTable().getIdMapping();
                                tblMappingSqlTbl = sqlTbl;
                            }
                        } else if (mmd.hasMap()) {
                            // Join across MAP relation
                            MapMetaData mapmd = mmd.getMap();
                            cmd = mapmd.getValueClassMetaData(clr);
                            tblMmd = mmd;
                            boolean embedded = mapKey ? (mapmd.isEmbeddedKey() || mapmd.isSerializedKey()) : (mapmd.isEmbeddedValue() || mapmd.isSerializedValue());
                            if (mapmd.getMapType() == MapType.MAP_TYPE_JOIN) {
                                // Add join to join table, then to related table (value)
                                MapTable joinTbl = (MapTable) storeMgr.getTable(mmd);
                                String aliasForMap = embedded ? aliasForJoin : (aliasForJoin + "_MAP");
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, aliasForMap, joinTbl.getOwnerMapping(), null, null, true);
                                if (embedded) {
                                    tblMappingSqlTbl = sqlTbl;
                                    tblIdMapping = mapKey ? joinTbl.getKeyMapping() : joinTbl.getValueMapping();
                                } else {
                                    if (mapKey) {
                                        // Join to key table and use that
                                        relTable = storeMgr.getDatastoreClass(mapmd.getKeyType(), clr);
                                        sqlTbl = stmt.join(joinType, sqlTbl, joinTbl.getKeyMapping(), relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                    // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                    } else {
                                        // Join to value table and use that
                                        relTable = storeMgr.getDatastoreClass(mapmd.getValueType(), clr);
                                        sqlTbl = stmt.join(joinType, sqlTbl, joinTbl.getValueMapping(), relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                    // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                    }
                                    tblMappingSqlTbl = sqlTbl;
                                    tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                                }
                            } else if (mapmd.getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
                                // Join to value table
                                DatastoreClass valTable = storeMgr.getDatastoreClass(mapmd.getValueType(), clr);
                                JavaTypeMapping mapTblOwnerMapping;
                                if (mmd.getMappedBy() != null) {
                                    mapTblOwnerMapping = valTable.getMemberMapping(mapmd.getValueClassMetaData(clr).getMetaDataForMember(mmd.getMappedBy()));
                                } else {
                                    mapTblOwnerMapping = valTable.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
                                }
                                String aliasForMap = (embedded || !mapKey) ? aliasForJoin : (aliasForJoin + "_MAP");
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), valTable, aliasForMap, mapTblOwnerMapping, null, null, true);
                                if (!embedded) {
                                    if (mapKey) {
                                        // Join to key table
                                        JavaTypeMapping keyMapping = valTable.getMemberMapping(mmd.getKeyMetaData().getMappedBy());
                                        relTable = storeMgr.getDatastoreClass(mapmd.getKeyType(), clr);
                                        sqlTbl = stmt.join(joinType, sqlTbl, keyMapping, relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                    // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                    }
                                }
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                            } else if (mapmd.getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
                                // Join to key table, and then to value table
                                DatastoreClass keyTable = storeMgr.getDatastoreClass(mapmd.getKeyType(), clr);
                                JavaTypeMapping mapTblOwnerMapping;
                                if (mmd.getMappedBy() != null) {
                                    mapTblOwnerMapping = keyTable.getMemberMapping(mapmd.getKeyClassMetaData(clr).getMetaDataForMember(mmd.getMappedBy()));
                                } else {
                                    mapTblOwnerMapping = keyTable.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
                                }
                                String aliasForMap = (embedded || mapKey) ? aliasForJoin : (aliasForJoin + "_MAP");
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), keyTable, aliasForMap, mapTblOwnerMapping, null, null, true);
                                if (!embedded) {
                                    if (!mapKey) {
                                        // Join to value table
                                        JavaTypeMapping valueMapping = keyTable.getMemberMapping(mmd.getValueMetaData().getMappedBy());
                                        relTable = storeMgr.getDatastoreClass(mapmd.getValueType(), clr);
                                        sqlTbl = stmt.join(joinType, sqlTbl, valueMapping, relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                    // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                    }
                                }
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                            }
                        } else if (mmd.hasArray()) {
                            // Join across ARRAY relation
                            cmd = mmd.getArray().getElementClassMetaData(clr);
                            if (mmd.getArray().isEmbeddedElement() && mmd.getJoinMetaData() != null) {
                                // Embedded element stored in (array) join table
                                ArrayTable relEmbTable = (ArrayTable) storeMgr.getTable(mmd);
                                JavaTypeMapping relOwnerMapping = relEmbTable.getOwnerMapping();
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), relEmbTable, aliasForJoin, relOwnerMapping, null, joinTableGroupName, true);
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = relEmbTable.getElementMapping();
                            } else {
                                relTable = storeMgr.getDatastoreClass(mmd.getArray().getElementType(), clr);
                                relMmd = mmd.getRelatedMemberMetaData(clr)[0];
                                if (mmd.getJoinMetaData() != null || relMmd.getJoinMetaData() != null) {
                                    // Join to join table, then to related table
                                    ElementContainerTable joinTbl = (ElementContainerTable) storeMgr.getTable(mmd);
                                    SQLTable joinSqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, null, joinTbl.getOwnerMapping(), null, null, true);
                                    sqlTbl = stmt.join(joinType, joinSqlTbl, joinTbl.getElementMapping(), relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                } else {
                                    // Join to related table FK
                                    sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), relTable, aliasForJoin, relTable.getMemberMapping(relMmd), null, joinTableGroupName, true);
                                }
                                tblIdMapping = sqlTbl.getTable().getIdMapping();
                                tblMappingSqlTbl = sqlTbl;
                            }
                        }
                    } else if (relationType == RelationType.ONE_TO_MANY_UNI) {
                        previousMapping = null;
                        if (mmd.hasCollection()) {
                            // Join across COLLECTION relation
                            cmd = mmd.getCollection().getElementClassMetaData(clr);
                            if (mmd.getCollection().isEmbeddedElement() && mmd.getJoinMetaData() != null) {
                                // Embedded element stored in (collection) join table
                                CollectionTable relEmbTable = (CollectionTable) storeMgr.getTable(mmd);
                                JavaTypeMapping relOwnerMapping = relEmbTable.getOwnerMapping();
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), relEmbTable, aliasForJoin, relOwnerMapping, null, joinTableGroupName, true);
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = relEmbTable.getElementMapping();
                            } else {
                                relTable = storeMgr.getDatastoreClass(mmd.getCollection().getElementType(), clr);
                                if (mmd.getJoinMetaData() != null) {
                                    // Join to join table, then to related table
                                    ElementContainerTable joinTbl = (ElementContainerTable) storeMgr.getTable(mmd);
                                    SQLTable joinSqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, null, joinTbl.getOwnerMapping(), null, null, true);
                                    sqlTbl = stmt.join(joinType, joinSqlTbl, joinTbl.getElementMapping(), relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                } else {
                                    // Join to related table FK
                                    JavaTypeMapping relMapping = relTable.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
                                    sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), relTable, aliasForJoin, relMapping, null, joinTableGroupName, true);
                                }
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                            }
                        } else if (mmd.hasMap()) {
                            // Join across MAP relation
                            MapMetaData mapmd = mmd.getMap();
                            cmd = mapmd.getValueClassMetaData(clr);
                            tblMmd = mmd;
                            boolean embedded = mapKey ? (mapmd.isEmbeddedKey() || mapmd.isSerializedKey()) : (mapmd.isEmbeddedValue() || mapmd.isSerializedValue());
                            if (mapmd.getMapType() == MapType.MAP_TYPE_JOIN) {
                                // Add join to join table, then to related table (value)
                                MapTable joinTbl = (MapTable) storeMgr.getTable(mmd);
                                String aliasForMap = (embedded || mapKey) ? aliasForJoin : (aliasForJoin + "_MAP");
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, aliasForMap, joinTbl.getOwnerMapping(), null, null, true);
                                if (embedded) {
                                    tblMappingSqlTbl = sqlTbl;
                                    tblIdMapping = mapKey ? joinTbl.getKeyMapping() : joinTbl.getValueMapping();
                                } else {
                                    if (mapKey) {
                                        // Join to key table and use that
                                        relTable = storeMgr.getDatastoreClass(mapmd.getKeyType(), clr);
                                        sqlTbl = stmt.join(joinType, sqlTbl, joinTbl.getKeyMapping(), relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                    // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                    } else {
                                        // Join to value table and use that
                                        relTable = storeMgr.getDatastoreClass(mapmd.getValueType(), clr);
                                        sqlTbl = stmt.join(joinType, sqlTbl, joinTbl.getValueMapping(), relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                    // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                    }
                                    tblMappingSqlTbl = sqlTbl;
                                    tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                                }
                            } else if (mapmd.getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
                                // Join to value table
                                DatastoreClass valTable = storeMgr.getDatastoreClass(mapmd.getValueType(), clr);
                                JavaTypeMapping mapTblOwnerMapping;
                                if (mmd.getMappedBy() != null) {
                                    mapTblOwnerMapping = valTable.getMemberMapping(mapmd.getValueClassMetaData(clr).getMetaDataForMember(mmd.getMappedBy()));
                                } else {
                                    mapTblOwnerMapping = valTable.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
                                }
                                String aliasForMap = (embedded || !mapKey) ? aliasForJoin : (aliasForJoin + "_MAP");
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), valTable, aliasForMap, mapTblOwnerMapping, null, null, true);
                                if (!embedded) {
                                    if (mapKey) {
                                        // Join to key table
                                        JavaTypeMapping keyMapping = valTable.getMemberMapping(mmd.getKeyMetaData().getMappedBy());
                                        relTable = storeMgr.getDatastoreClass(mapmd.getKeyType(), clr);
                                        sqlTbl = stmt.join(joinType, sqlTbl, keyMapping, relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                    // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                    }
                                }
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                            } else if (mapmd.getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
                                // Join to key table, and then to value table
                                DatastoreClass keyTable = storeMgr.getDatastoreClass(mapmd.getKeyType(), clr);
                                JavaTypeMapping mapTblOwnerMapping;
                                if (mmd.getMappedBy() != null) {
                                    mapTblOwnerMapping = keyTable.getMemberMapping(mapmd.getKeyClassMetaData(clr).getMetaDataForMember(mmd.getMappedBy()));
                                } else {
                                    mapTblOwnerMapping = keyTable.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
                                }
                                String aliasForMap = (embedded || mapKey) ? aliasForJoin : (aliasForJoin + "_MAP");
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), keyTable, aliasForMap, mapTblOwnerMapping, null, null, true);
                                if (!embedded) {
                                    if (!mapKey) {
                                        // Join to value table
                                        JavaTypeMapping valueMapping = keyTable.getMemberMapping(mmd.getValueMetaData().getMappedBy());
                                        relTable = storeMgr.getDatastoreClass(mapmd.getValueType(), clr);
                                        sqlTbl = stmt.join(joinType, sqlTbl, valueMapping, relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                    // TODO if there is an ON clause it needs to go on the correct join See [rdbms-177]
                                    }
                                }
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                            }
                        } else if (mmd.hasArray()) {
                            // Join across ARRAY relation
                            cmd = mmd.getArray().getElementClassMetaData(clr);
                            if (mmd.getArray().isEmbeddedElement() && mmd.getJoinMetaData() != null) {
                                // Embedded element stored in (array) join table
                                ArrayTable relEmbTable = (ArrayTable) storeMgr.getTable(mmd);
                                JavaTypeMapping relOwnerMapping = relEmbTable.getOwnerMapping();
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), relEmbTable, aliasForJoin, relOwnerMapping, null, joinTableGroupName, true);
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = relEmbTable.getElementMapping();
                            } else {
                                relTable = storeMgr.getDatastoreClass(mmd.getArray().getElementType(), clr);
                                if (mmd.getJoinMetaData() != null) {
                                    // Join to join table, then to related table
                                    ElementContainerTable joinTbl = (ElementContainerTable) storeMgr.getTable(mmd);
                                    SQLTable joinSqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, null, joinTbl.getOwnerMapping(), null, null, true);
                                    sqlTbl = stmt.join(joinType, joinSqlTbl, joinTbl.getElementMapping(), relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                                } else {
                                    // Join to related table FK
                                    JavaTypeMapping relMapping = relTable.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
                                    sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), relTable, aliasForJoin, relMapping, null, joinTableGroupName, true);
                                }
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                            }
                        }
                    } else if (relationType == RelationType.MANY_TO_MANY_BI) {
                        previousMapping = null;
                        relTable = storeMgr.getDatastoreClass(mmd.getCollection().getElementType(), clr);
                        cmd = mmd.getCollection().getElementClassMetaData(clr);
                        relMmd = mmd.getRelatedMemberMetaData(clr)[0];
                        // Join to join table, then to related table
                        if (mmd.hasCollection()) {
                            CollectionTable joinTbl = (CollectionTable) storeMgr.getTable(mmd);
                            SQLTable joinSqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, null, joinTbl.getOwnerMapping(), null, null, true);
                            sqlTbl = stmt.join(joinType, joinSqlTbl, joinTbl.getElementMapping(), relTable, aliasForJoin, relTable.getIdMapping(), null, joinTableGroupName, true);
                        } else if (mmd.hasMap()) {
                            NucleusLogger.QUERY.warn("We do not support joining across a M-N MAP field : " + mmd.getFullFieldName());
                        } else if (mmd.hasArray()) {
                            NucleusLogger.QUERY.warn("We do not support joining across a M-N ARRAY field : " + mmd.getFullFieldName());
                        }
                        tblMappingSqlTbl = sqlTbl;
                        tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                    } else if (relationType == RelationType.MANY_TO_ONE_BI) {
                        previousMapping = null;
                        relTable = storeMgr.getDatastoreClass(mmd.getTypeName(), clr);
                        Object[] castDiscrimValues = null;
                        if (castCls != null && lastComponent) {
                            cmd = mmgr.getMetaDataForClass(castCls, clr);
                            if (cmd.hasDiscriminatorStrategy()) {
                                // Restrict discriminator on cast type to be the type+subclasses
                                castDiscrimValues = getDiscriminatorValuesForCastClass(cmd);
                            }
                        } else {
                            cmd = mmgr.getMetaDataForClass(mmd.getType(), clr);
                        }
                        relMmd = mmd.getRelatedMemberMetaData(clr)[0];
                        if (mmd.getJoinMetaData() != null || relMmd.getJoinMetaData() != null) {
                            // Join to join table, then to related table
                            if (mmd.hasCollection()) {
                                CollectionTable joinTbl = (CollectionTable) storeMgr.getTable(relMmd);
                                SQLTable joinSqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, null, joinTbl.getElementMapping(), null, null, true);
                                sqlTbl = stmt.join(joinType, joinSqlTbl, joinTbl.getOwnerMapping(), relTable, aliasForJoin, relTable.getIdMapping(), castDiscrimValues, joinTableGroupName, true);
                            } else if (mmd.hasMap()) {
                                NucleusLogger.QUERY.warn("We do not support joining across a N-1 MAP field : " + mmd.getFullFieldName());
                            } else if (mmd.hasArray()) {
                                NucleusLogger.QUERY.warn("We do not support joining across a N-1 ARRAY field : " + mmd.getFullFieldName());
                            }
                        } else {
                            // Join to owner table
                            JavaTypeMapping fkMapping = sqlTbl.getTable().getMemberMapping(mmd);
                            sqlTbl = stmt.join(joinType, sqlTbl, fkMapping, relTable, aliasForJoin, relTable.getIdMapping(), castDiscrimValues, joinTableGroupName, true);
                        }
                        tblMappingSqlTbl = sqlTbl;
                        tblIdMapping = tblMappingSqlTbl.getTable().getIdMapping();
                    } else {
                        // NO RELATION, but cater for join table cases
                        previousMapping = null;
                        if (mmd.hasCollection()) {
                            cmd = null;
                            if (mmd.getJoinMetaData() != null) {
                                // Join to join table
                                CollectionTable joinTbl = (CollectionTable) storeMgr.getTable(mmd);
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, aliasForJoin, joinTbl.getOwnerMapping(), null, null, true);
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = joinTbl.getElementMapping();
                            } else {
                                throw new NucleusUserException("FROM clause contains join to Collection field at " + mmd.getFullFieldName() + " yet this has no join table");
                            }
                        } else if (mmd.hasMap()) {
                            MapMetaData mapmd = mmd.getMap();
                            cmd = mapmd.getValueClassMetaData(clr);
                            tblMmd = mmd;
                            if (// Should be the only type when relationType is NONE
                            mapmd.getMapType() == MapType.MAP_TYPE_JOIN) {
                                // Add join to join table
                                MapTable joinTbl = (MapTable) storeMgr.getTable(mmd);
                                String aliasForMap = aliasForJoin;
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, aliasForMap, joinTbl.getOwnerMapping(), null, null, true);
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = joinTbl.getValueMapping();
                            } else {
                                throw new NucleusUserException("FROM clause contains join to Map field at " + mmd.getFullFieldName() + " yet this has no join table");
                            }
                        } else if (mmd.hasArray()) {
                            cmd = null;
                            if (mmd.getJoinMetaData() != null) {
                                // Join to join table
                                ArrayTable joinTbl = (ArrayTable) storeMgr.getTable(mmd);
                                sqlTbl = stmt.join(joinType, sqlTbl, sqlTbl.getTable().getIdMapping(), joinTbl, aliasForJoin, joinTbl.getOwnerMapping(), null, null, true);
                                tblMappingSqlTbl = sqlTbl;
                                tblIdMapping = joinTbl.getElementMapping();
                            } else {
                                throw new NucleusUserException("FROM clause contains join to array field at " + mmd.getFullFieldName() + " yet this has no join table");
                            }
                        }
                    }
                }
            }
            if (joinAlias != null) {
                if (explicitJoinPrimaryByAlias == null) {
                    explicitJoinPrimaryByAlias = new HashMap<>();
                }
                explicitJoinPrimaryByAlias.put(joinAlias, joinPrimExpr.getId());
                SQLTableMapping tblMapping = null;
                if (tblMmd != null) {
                    // Maps store the member so we can more easily navigate to the key/value
                    tblMapping = new SQLTableMapping(tblMappingSqlTbl, cmd, tblMmd, tblIdMapping);
                } else {
                    tblMapping = new SQLTableMapping(tblMappingSqlTbl, cmd, tblIdMapping);
                }
                setSQLTableMappingForAlias(joinAlias, tblMapping);
            }
            if (joinOnExpr != null) {
                // Convert the ON expression to a BooleanExpression
                processingOnClause = true;
                joinOnExpr.evaluate(this);
                BooleanExpression joinOnSqlExpr = (BooleanExpression) stack.pop();
                processingOnClause = false;
                // Add the ON expression to the most recent SQLTable at the end of this chain
                // TODO Allow for SQL JOIN "grouping" [rdbms-177]. This applies to all cases where we join to a join table then to an element/value table and
                // need to apply the ON clause across both
                SQLJoin join = stmt.getJoinForTable(sqlTbl);
                join.addAndCondition(joinOnSqlExpr);
            }
        } else {
            previousMapping = null;
        }
        // Move on to next join in the chain
        rightExpr = rightExpr.getRight();
    }
}

Example 50 with MetaDataManager

use of org.datanucleus.metadata.MetaDataManager in project datanucleus-rdbms by datanucleus.

the class MultiPersistableMapping method getMappingNumberForValue.

/**
 * Convenience accessor for the number of the java type mapping where the passed value would be
 * stored. If no suitable mapping is found will return -1. If is a persistent interface then will
 * return -2 meaning persist against *any* mapping
 * @param ec ExecutionContext
 * @param value The value
 * @return The index of javaTypeMappings to use (if any), or -1 (none), or -2 (any)
 */
protected int getMappingNumberForValue(ExecutionContext ec, Object value) {
    if (value == null) {
        return -1;
    }
    ClassLoaderResolver clr = ec.getClassLoaderResolver();
    // Find the appropriate mapping
    for (int i = 0; i < javaTypeMappings.length; i++) {
        Class cls = clr.classForName(javaTypeMappings[i].getType());
        if (cls.isAssignableFrom(value.getClass())) {
            return i;
        }
    }
    // PERSISTENT INTERFACE : allow for the value (impl) not be directly assignable from the superclass impl
    // e.g If we have interface "Base" with impl "BaseImpl", and sub-interface "Sub1" with impl "Sub1Impl"
    // So if the mapping is of type BaseImpl and the value is Sub1Impl then they don't come up as "assignable"
    // but they are
    Class mappingJavaType = null;
    MetaDataManager mmgr = storeMgr.getNucleusContext().getMetaDataManager();
    boolean isPersistentInterface = mmgr.isPersistentInterface(getType());
    if (isPersistentInterface) {
        // Field is declared as a "persistent-interface" type so all impls of that type should match
        mappingJavaType = clr.classForName(getType());
    } else if (mmd != null && mmd.getFieldTypes() != null && mmd.getFieldTypes().length == 1) {
        isPersistentInterface = mmgr.isPersistentInterface(mmd.getFieldTypes()[0]);
        if (isPersistentInterface) {
            // Field is declared as interface and accepts "persistent-interface" value, so all impls should match
            mappingJavaType = clr.classForName(mmd.getFieldTypes()[0]);
        }
    }
    if (mappingJavaType != null && mappingJavaType.isAssignableFrom(value.getClass())) {
        // Persistent interface persistable in all mappings. Should only be 1 anyway
        return -2;
    }
    return -1;
}