Examples with MapTable org.datanucleus.store.rdbms.table.MapTable used on opensource projects

Example 16 with MapTable

use of org.datanucleus.store.rdbms.table.MapTable in project datanucleus-rdbms by datanucleus.

the class MapContainsKeyMethod method containsAsJoin.

/**
 * Method to return an expression for Map.containsKey using INNER JOIN to the element.
 * This is only for use when there are no "!containsKey" and no "OR" operations.
 * Creates SQL by adding INNER JOIN to the join table (where it exists), and also to the key table
 * adding an AND condition on the element (with value of the keyExpr).
 * Returns a BooleanExpression "TRUE" (since the INNER JOIN will guarantee if the key is contained of not).
 * @param stmt SQLStatement
 * @param mapExpr Map expression
 * @param keyExpr Expression for the key
 * @param joinType Type of join
 * @return Contains expression
 */
protected SQLExpression containsAsJoin(SQLStatement stmt, MapExpression mapExpr, SQLExpression keyExpr, JoinType joinType) {
    boolean keyIsUnbound = (keyExpr instanceof UnboundExpression);
    String varName = null;
    String keyAlias = null;
    if (keyIsUnbound) {
        varName = ((UnboundExpression) keyExpr).getVariableName();
        NucleusLogger.QUERY.debug("map.containsKey(" + keyExpr + ") binding unbound variable " + varName + " using INNER JOIN");
    // TODO What if the variable is declared as a subtype, handle this see CollectionContainsMethod
    } else if (!stmt.getQueryGenerator().hasExplicitJoins()) {
        if (stmt.getJoinTypeForTable(keyExpr.getSQLTable()) == JoinType.CROSS_JOIN) {
            keyAlias = stmt.removeCrossJoin(keyExpr.getSQLTable());
            keyIsUnbound = true;
            NucleusLogger.QUERY.debug("map.containsKey(" + keyExpr + ") was previously bound as CROSS JOIN but changing to INNER JOIN");
        }
    }
    RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
    AbstractClassMetaData keyCmd = mmd.getMap().getKeyClassMetaData(clr);
    if (mmd.getMap().getMapType() == MapType.MAP_TYPE_JOIN) {
        // Map formed in join table - add join to join table, then to key table (if present)
        MapTable mapTbl = (MapTable) storeMgr.getTable(mmd);
        SQLTable joinSqlTbl = stmt.join(joinType, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping(), mapTbl, null, mapTbl.getOwnerMapping(), null, null);
        if (keyCmd != null) {
            if (keyIsUnbound) {
                DatastoreClass keyTbl = storeMgr.getDatastoreClass(keyCmd.getFullClassName(), clr);
                SQLTable keySqlTbl = stmt.join(joinType, joinSqlTbl, mapTbl.getKeyMapping(), keyTbl, keyAlias, keyTbl.getIdMapping(), null, null);
                // Bind the variable in the QueryGenerator
                keyExpr = exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getIdMapping());
                stmt.getQueryGenerator().bindVariable(varName, keyCmd, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
            } else {
                // Add restrict to key
                SQLExpression keyIdExpr = exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getKeyMapping());
                stmt.whereAnd(keyIdExpr.eq(keyExpr), true);
            }
        } else {
            if (keyIsUnbound) {
                // Bind the variable in the QueryGenerator
                keyExpr = exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getKeyMapping());
                stmt.getQueryGenerator().bindVariable(varName, null, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
            } else {
                // Add restrict to key
                SQLExpression keyIdExpr = exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getKeyMapping());
                stmt.whereAnd(keyIdExpr.eq(keyExpr), true);
            }
        }
    } else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
        // Map formed in value table - add join to value table, then to key table
        AbstractClassMetaData valCmd = mmd.getMap().getValueClassMetaData(clr);
        DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
        AbstractMemberMetaData valKeyMmd = valCmd.getMetaDataForMember(mmd.getKeyMetaData().getMappedBy());
        JavaTypeMapping ownerMapping = null;
        if (mmd.getMappedBy() != null) {
            ownerMapping = valTbl.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = valTbl.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        SQLTable valSqlTbl = stmt.join(joinType, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping(), valTbl, null, ownerMapping, null, null);
        if (keyCmd != null) {
            DatastoreClass keyTbl = storeMgr.getDatastoreClass(keyCmd.getFullClassName(), clr);
            SQLTable keySqlTbl = stmt.join(joinType, valSqlTbl, valTbl.getMemberMapping(valKeyMmd), keyTbl, keyAlias, keyTbl.getIdMapping(), null, null);
            if (keyIsUnbound) {
                // Bind the variable in the QueryGenerator
                keyExpr = exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getIdMapping());
                stmt.getQueryGenerator().bindVariable(varName, keyCmd, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
            } else {
                // Add restrict to key
                SQLExpression keyIdExpr = exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getIdMapping());
                stmt.whereAnd(keyIdExpr.eq(keyExpr), true);
            }
        } else {
            if (keyIsUnbound) {
                // Bind the variable in the QueryGenerator
                keyExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getMemberMapping(valKeyMmd));
                stmt.getQueryGenerator().bindVariable(varName, null, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
            } else {
                // Add restrict to key
                SQLExpression keyIdExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getMemberMapping(valKeyMmd));
                stmt.whereAnd(keyIdExpr.eq(keyExpr), true);
            }
        }
    } else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
        // Map formed in key table - add join to key table
        DatastoreClass keyTbl = storeMgr.getDatastoreClass(keyCmd.getFullClassName(), clr);
        JavaTypeMapping ownerMapping = null;
        if (mmd.getMappedBy() != null) {
            ownerMapping = keyTbl.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = keyTbl.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        SQLTable keySqlTbl = stmt.join(joinType, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping(), keyTbl, keyAlias, ownerMapping, null, null);
        if (keyIsUnbound) {
            // Bind the variable in the QueryGenerator
            keyExpr = exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getIdMapping());
            stmt.getQueryGenerator().bindVariable(varName, keyCmd, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
        } else {
            // Add restrict to key
            SQLExpression keyIdExpr = exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getIdMapping());
            stmt.whereAnd(keyIdExpr.eq(keyExpr), true);
        }
    }
    JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
    return exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, true));
}

Example 17 with MapTable

use of org.datanucleus.store.rdbms.table.MapTable in project datanucleus-rdbms by datanucleus.

the class MapKeyMethod method getAsSubquery.

/**
 * Implementation of KEY(mapExpr) using a subquery on the table representing the map.
 * @param stmt SQLStatement
 * @param mapExpr The map expression
 * @return The value expression
 */
protected SQLExpression getAsSubquery(SQLStatement stmt, MapExpression mapExpr) {
    AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
    MapMetaData mapmd = mmd.getMap();
    RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    JavaTypeMapping ownerMapping = null;
    JavaTypeMapping keyMapping = null;
    Table mapTbl = null;
    if (mapmd.getMapType() == MapType.MAP_TYPE_JOIN) {
        // JoinTable
        mapTbl = storeMgr.getTable(mmd);
        ownerMapping = ((MapTable) mapTbl).getOwnerMapping();
        keyMapping = ((MapTable) mapTbl).getKeyMapping();
    } else if (mapmd.getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
        // ForeignKey from value table to key
        AbstractClassMetaData valCmd = mapmd.getValueClassMetaData(clr);
        mapTbl = storeMgr.getDatastoreClass(mmd.getMap().getValueType(), clr);
        if (mmd.getMappedBy() != null) {
            ownerMapping = mapTbl.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = ((DatastoreClass) mapTbl).getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        String keyFieldName = mmd.getKeyMetaData().getMappedBy();
        AbstractMemberMetaData valKeyMmd = valCmd.getMetaDataForMember(keyFieldName);
        keyMapping = mapTbl.getMemberMapping(valKeyMmd);
    } else if (mapmd.getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
        // ForeignKey from key table to value
        AbstractClassMetaData keyCmd = mapmd.getKeyClassMetaData(clr);
        mapTbl = storeMgr.getDatastoreClass(mmd.getMap().getKeyType(), clr);
        if (mmd.getMappedBy() != null) {
            ownerMapping = mapTbl.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = ((DatastoreClass) mapTbl).getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        keyMapping = mapTbl.getIdMapping();
    } else {
        throw new NucleusException("Invalid map for " + mapExpr + " in get() call");
    }
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    SelectStatement subStmt = new SelectStatement(stmt, storeMgr, mapTbl, null, null);
    subStmt.setClassLoaderResolver(clr);
    SQLExpression keyExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), keyMapping);
    subStmt.select(keyExpr, null);
    // Link to primary statement
    SQLExpression elementOwnerExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
    SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
    subStmt.whereAnd(elementOwnerExpr.eq(ownerIdExpr), true);
    SubqueryExpression subExpr = new SubqueryExpression(stmt, subStmt);
    subExpr.setJavaTypeMapping(keyMapping);
    return subExpr;
}

Example 18 with MapTable

use of org.datanucleus.store.rdbms.table.MapTable in project datanucleus-rdbms by datanucleus.

the class MapKeyMethod method getAsJoin.

/**
 * Implementation of KEY(mapExpr) using a join to the table representing the map, and returning an expression for the key.
 * @param mapExpr The map expression
 * @return The value expression
 */
protected SQLExpression getAsJoin(SQLStatement stmt, MapExpression mapExpr) {
    JavaTypeMapping m = mapExpr.getJavaTypeMapping();
    RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    AbstractMemberMetaData mmd = m.getMemberMetaData();
    // Use the statement of the table for this Map expression, since it could be in an outer query
    stmt = mapExpr.getSQLTable().getSQLStatement();
    if (mmd != null) {
        MapMetaData mapmd = mmd.getMap();
        SQLTable mapSqlTbl = mapExpr.getSQLTable();
        // Set alias of "map" table from MapExpression in case it was defined in FROM clause
        String mapJoinAlias = mapExpr.getAliasForMapTable();
        if (mapJoinAlias == null) {
            mapJoinAlias = (mapExpr.getSQLTable().getAlias().toString() + "_" + mmd.getName()).toUpperCase();
        }
        if (mapmd.getMapType() == MapType.MAP_TYPE_JOIN) {
            // Add join to join table
            MapTable joinTbl = (MapTable) storeMgr.getTable(mmd);
            SQLTable joinSqlTbl = stmt.getTable(mapJoinAlias);
            if (joinSqlTbl == null) {
                joinSqlTbl = stmt.join(JoinType.INNER_JOIN, mapSqlTbl, mapSqlTbl.getTable().getIdMapping(), joinTbl, mapJoinAlias, joinTbl.getOwnerMapping(), null, null);
            }
            // Return key expression
            if (mapmd.getKeyClassMetaData(clr) != null && !mapmd.isEmbeddedKey()) {
                // Persistable key so join to its table (default to "{mapJoinAlias}_KEY")
                DatastoreClass keyTable = storeMgr.getDatastoreClass(mapmd.getKeyType(), clr);
                SQLTable keySqlTbl = stmt.getTable(mapJoinAlias + "_KEY");
                if (keySqlTbl == null) {
                    keySqlTbl = stmt.join(JoinType.INNER_JOIN, joinSqlTbl, joinTbl.getKeyMapping(), keyTable, mapJoinAlias + "_KEY", keyTable.getIdMapping(), null, null);
                }
                return exprFactory.newExpression(stmt, keySqlTbl, keyTable.getIdMapping());
            }
            return exprFactory.newExpression(stmt, joinSqlTbl, joinTbl.getKeyMapping());
        } else if (mapmd.getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
            // Key stored in value table, so join to value table
            DatastoreClass valTable = storeMgr.getDatastoreClass(mapmd.getValueType(), clr);
            AbstractClassMetaData valCmd = mmd.getMap().getValueClassMetaData(clr);
            JavaTypeMapping mapTblOwnerMapping;
            if (mmd.getMappedBy() != null) {
                mapTblOwnerMapping = valTable.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
            } else {
                mapTblOwnerMapping = valTable.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
            }
            SQLTable valSqlTbl = stmt.join(JoinType.INNER_JOIN, mapSqlTbl, mapSqlTbl.getTable().getIdMapping(), valTable, mapJoinAlias, mapTblOwnerMapping, null, null);
            // Return key expression
            AbstractMemberMetaData valKeyMmd = mapmd.getValueClassMetaData(clr).getMetaDataForMember(mmd.getKeyMetaData().getMappedBy());
            JavaTypeMapping keyMapping = valTable.getMemberMapping(valKeyMmd);
            return exprFactory.newExpression(stmt, valSqlTbl, keyMapping);
        } else if (mapmd.getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
            // Value stored in key table, so join to key table
            DatastoreClass keyTable = storeMgr.getDatastoreClass(mapmd.getKeyType(), clr);
            AbstractClassMetaData keyCmd = mmd.getMap().getKeyClassMetaData(clr);
            JavaTypeMapping mapTblOwnerMapping;
            if (mmd.getMappedBy() != null) {
                mapTblOwnerMapping = keyTable.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
            } else {
                mapTblOwnerMapping = keyTable.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
            }
            SQLTable keySqlTbl = stmt.join(JoinType.INNER_JOIN, mapSqlTbl, mapSqlTbl.getTable().getIdMapping(), keyTable, mapJoinAlias, mapTblOwnerMapping, null, null);
            // Return key expression
            return exprFactory.newExpression(stmt, keySqlTbl, keyTable.getIdMapping());
        }
    }
    throw new NucleusException("KEY(map) for the filter is not supported for " + mapExpr + ". Why not contribute support for it?");
}