Examples with JpaMetamodelAccessor com.blazebit.persistence.spi.JpaMetamodelAccessor used on opensource projects

Example 1 with JpaMetamodelAccessor

use of com.blazebit.persistence.spi.JpaMetamodelAccessor in project blaze-persistence by Blazebit.

the class JpaUtils method expandBindings.

public static void expandBindings(Map<String, Integer> bindingMap, Map<String, String> columnBindingMap, Map<String, ExtendedAttribute<?, ?>> attributeEntries, ClauseType clause, AbstractCommonQueryBuilder<?, ?, ?, ?, ?> queryBuilder, String keyFunctionExpression, boolean enableElementCollectionIdCutoff) {
    SelectManager<?> selectManager = queryBuilder.selectManager;
    JoinManager joinManager = queryBuilder.joinManager;
    ParameterManager parameterManager = queryBuilder.parameterManager;
    JpaProvider jpaProvider = queryBuilder.mainQuery.jpaProvider;
    EntityMetamodelImpl metamodel = queryBuilder.mainQuery.metamodel;
    boolean requiresNullCast = queryBuilder.mainQuery.dbmsDialect.requiresNullCast();
    boolean needsCastParameters = queryBuilder.mainQuery.dbmsDialect.needsCastParameters();
    JpaMetamodelAccessor jpaMetamodelAccessor = jpaProvider.getJpaMetamodelAccessor();
    boolean needsElementCollectionIdCutoff = enableElementCollectionIdCutoff && jpaProvider.needsElementCollectionIdCutoff();
    final Queue<String> attributeQueue = new ArrayDeque<>(bindingMap.keySet());
    while (!attributeQueue.isEmpty()) {
        final String attributeName = attributeQueue.remove();
        Integer tupleIndex = bindingMap.get(attributeName);
        Class<?> elementType;
        String columnType;
        boolean splitExpression;
        ExtendedAttribute<?, ?> attributeEntry = attributeEntries.get(attributeName);
        if (attributeEntry == null) {
            if (!attributeName.equalsIgnoreCase(keyFunctionExpression)) {
                continue;
            }
            String realAttributeName = attributeName.substring(attributeName.indexOf('(') + 1, attributeName.length() - 1);
            attributeEntry = attributeEntries.get(realAttributeName);
            if (attributeEntry.getAttribute() instanceof ListAttribute<?, ?>) {
                elementType = Integer.class;
                columnType = queryBuilder.mainQuery.dbmsDialect.getSqlType(Integer.class);
            } else {
                MapAttribute<?, ?, ?> mapAttribute = (MapAttribute<?, ?, ?>) attributeEntry.getAttribute();
                elementType = mapAttribute.getKeyJavaType();
                columnType = attributeEntry.getJoinTable() != null && attributeEntry.getJoinTable().getKeyColumnTypes() != null && attributeEntry.getJoinTable().getKeyColumnTypes().size() == 1 ? attributeEntry.getJoinTable().getKeyColumnTypes().values().iterator().next() : null;
            }
            splitExpression = false;
        } else {
            elementType = attributeEntry.getElementClass();
            columnType = attributeEntry.getColumnTypes().length == 0 ? null : attributeEntry.getColumnTypes()[0];
            final List<Attribute<?, ?>> attributePath = attributeEntry.getAttributePath();
            final Attribute<?, ?> lastAttribute = attributePath.get(attributePath.size() - 1);
            splitExpression = lastAttribute.getPersistentAttributeType() == Attribute.PersistentAttributeType.EMBEDDED;
            if (!splitExpression) {
                if ((clause != ClauseType.SET || jpaProvider.supportsUpdateSetAssociationId()) && jpaMetamodelAccessor.isJoinable(lastAttribute) && !isBasicElementType(lastAttribute)) {
                    splitExpression = true;
                    if (needsElementCollectionIdCutoff) {
                        OUTER: for (int i = 0; i < attributePath.size() - 1; i++) {
                            Attribute<?, ?> attribute = attributePath.get(i);
                            if (attribute.getPersistentAttributeType() == Attribute.PersistentAttributeType.ELEMENT_COLLECTION) {
                                // This is a special case, when an embeddable is between an element collection and the association, we still need to split the expression
                                for (int j = i + 1; j < attributePath.size() - 1; j++) {
                                    attribute = attributePath.get(j);
                                    if (attribute.getPersistentAttributeType() == Attribute.PersistentAttributeType.EMBEDDED) {
                                        break OUTER;
                                    }
                                }
                                splitExpression = false;
                                break;
                            }
                        }
                    }
                }
            }
        }
        SelectInfo selectInfo = selectManager.getSelectInfos().get(tupleIndex);
        final Expression selectExpression = selectInfo.getExpression();
        if (splitExpression) {
            // TODO: Maybe also allow Treat, Case-When, Array?
            if (selectExpression instanceof NullExpression) {
                final Collection<String> embeddedPropertyNames = getEmbeddedPropertyPaths(attributeEntries, attributeName, needsElementCollectionIdCutoff, false);
                if (embeddedPropertyNames.size() > 0) {
                    selectManager.getSelectInfos().remove(tupleIndex.intValue());
                    bindingMap.remove(attributeName);
                    // We are going to insert the expanded attributes as new select items and shift existing ones
                    int delta = embeddedPropertyNames.size() - 1;
                    if (delta > 0) {
                        for (Map.Entry<String, Integer> entry : bindingMap.entrySet()) {
                            if (entry.getValue() > tupleIndex) {
                                entry.setValue(entry.getValue() + delta);
                            }
                        }
                    }
                    int offset = 0;
                    for (String embeddedPropertyName : embeddedPropertyNames) {
                        String nestedAttributePath = attributeName + "." + embeddedPropertyName;
                        ExtendedAttribute<?, ?> nestedAttributeEntry = attributeEntries.get(nestedAttributePath);
                        // Process the nested attribute path recursively
                        attributeQueue.add(nestedAttributePath);
                        // Replace this binding in the binding map, additional selects need an updated index
                        bindingMap.put(nestedAttributePath, tupleIndex + offset);
                        selectManager.select(offset == 0 ? selectExpression : selectExpression.copy(ExpressionCopyContext.EMPTY), null, tupleIndex + offset);
                        if (columnBindingMap != null) {
                            for (String column : nestedAttributeEntry.getColumnNames()) {
                                columnBindingMap.put(column, nestedAttributePath);
                            }
                        }
                        offset++;
                    }
                }
            } else if (selectExpression instanceof PathExpression) {
                boolean firstBinding = true;
                final Collection<String> embeddedPropertyNames = getEmbeddedPropertyPaths(attributeEntries, attributeName, needsElementCollectionIdCutoff, false);
                PathExpression baseExpression = embeddedPropertyNames.size() > 1 ? ((PathExpression) selectExpression).copy(ExpressionCopyContext.EMPTY) : ((PathExpression) selectExpression);
                joinManager.implicitJoin(baseExpression, true, true, true, null, ClauseType.SELECT, new HashSet<String>(), false, false, false, false);
                if (elementType != baseExpression.getPathReference().getType().getJavaType()) {
                    throw new IllegalStateException("An association should be bound to its association type and not its identifier type");
                }
                if (embeddedPropertyNames.size() > 0) {
                    bindingMap.remove(attributeName);
                    // We are going to insert the expanded attributes as new select items and shift existing ones
                    int delta = embeddedPropertyNames.size() - 1;
                    if (delta > 0) {
                        for (Map.Entry<String, Integer> entry : bindingMap.entrySet()) {
                            if (entry.getValue() > tupleIndex) {
                                entry.setValue(entry.getValue() + delta);
                            }
                        }
                    }
                    int offset = 0;
                    for (String embeddedPropertyName : embeddedPropertyNames) {
                        PathExpression pathExpression = firstBinding ? ((PathExpression) selectExpression) : baseExpression.copy(ExpressionCopyContext.EMPTY);
                        for (String propertyNamePart : embeddedPropertyName.split("\\.")) {
                            pathExpression.getExpressions().add(new PropertyExpression(propertyNamePart));
                        }
                        String nestedAttributePath = attributeName + "." + embeddedPropertyName;
                        ExtendedAttribute<?, ?> nestedAttributeEntry = attributeEntries.get(nestedAttributePath);
                        // Process the nested attribute path recursively
                        attributeQueue.add(nestedAttributePath);
                        // Replace this binding in the binding map, additional selects need an updated index
                        bindingMap.put(nestedAttributePath, firstBinding ? tupleIndex : tupleIndex + offset);
                        if (!firstBinding) {
                            selectManager.select(pathExpression, null, tupleIndex + offset);
                        } else {
                            firstBinding = false;
                        }
                        if (columnBindingMap != null) {
                            for (String column : nestedAttributeEntry.getColumnNames()) {
                                columnBindingMap.put(column, nestedAttributePath);
                            }
                        }
                        offset++;
                    }
                }
            } else if (selectExpression instanceof ParameterExpression) {
                final Collection<String> embeddedPropertyNames = getEmbeddedPropertyPaths(attributeEntries, attributeName, jpaProvider.needsElementCollectionIdCutoff(), false);
                if (embeddedPropertyNames.size() > 0) {
                    ParameterExpression parameterExpression = (ParameterExpression) selectExpression;
                    String parameterName = parameterExpression.getName();
                    Map<String, List<String>> parameterAccessPaths = new HashMap<>(embeddedPropertyNames.size());
                    ParameterValueTransformer tranformer = parameterManager.getParameter(parameterName).getTransformer();
                    if (tranformer instanceof SplittingParameterTransformer) {
                        for (String name : ((SplittingParameterTransformer) tranformer).getParameterNames()) {
                            parameterManager.unregisterParameterName(name, clause, queryBuilder);
                        }
                    }
                    selectManager.getSelectInfos().remove(tupleIndex.intValue());
                    bindingMap.remove(attributeName);
                    // We are going to insert the expanded attributes as new select items and shift existing ones
                    int delta = embeddedPropertyNames.size() - 1;
                    if (delta > 0) {
                        for (Map.Entry<String, Integer> entry : bindingMap.entrySet()) {
                            if (entry.getValue() > tupleIndex) {
                                entry.setValue(entry.getValue() + delta);
                            }
                        }
                    }
                    int offset = 0;
                    for (String embeddedPropertyName : embeddedPropertyNames) {
                        String subParamName = "_" + parameterName + "_" + embeddedPropertyName.replace('.', '_');
                        parameterManager.registerParameterName(subParamName, false, clause, queryBuilder);
                        parameterAccessPaths.put(subParamName, Arrays.asList(embeddedPropertyName.split("\\.")));
                        String nestedAttributePath = attributeName + "." + embeddedPropertyName;
                        ExtendedAttribute<?, ?> nestedAttributeEntry = attributeEntries.get(nestedAttributePath);
                        // Process the nested attribute path recursively
                        attributeQueue.add(nestedAttributePath);
                        // Replace this binding in the binding map, additional selects need an updated index
                        bindingMap.put(nestedAttributePath, tupleIndex + offset);
                        selectManager.select(new ParameterExpression(subParamName), null, tupleIndex + offset);
                        if (columnBindingMap != null) {
                            for (String column : nestedAttributeEntry.getColumnNames()) {
                                columnBindingMap.put(column, nestedAttributePath);
                            }
                        }
                        offset++;
                    }
                    parameterManager.getParameter(parameterName).setTransformer(new SplittingParameterTransformer(parameterManager, metamodel, elementType, parameterAccessPaths));
                }
            } else {
                throw new IllegalArgumentException("Illegal expression '" + selectExpression.toString() + "' for binding relation '" + attributeName + "'!");
            }
        } else if (requiresNullCast && selectExpression instanceof NullExpression) {
            if (BasicCastTypes.TYPES.contains(elementType) && queryBuilder.statementType != DbmsStatementType.INSERT) {
                // We also need a cast for parameter expressions except in the SET clause
                List<Expression> arguments = new ArrayList<>(2);
                arguments.add(selectExpression);
                if (columnType != null) {
                    arguments.add(new StringLiteral(columnType));
                }
                selectInfo.set(new FunctionExpression("CAST_" + elementType.getSimpleName(), arguments, selectExpression));
            } else {
                final EntityMetamodelImpl.AttributeExample attributeExample = metamodel.getBasicTypeExampleAttributes().get(elementType);
                if (attributeExample != null) {
                    List<Expression> arguments = new ArrayList<>(2);
                    arguments.add(new SubqueryExpression(new Subquery() {

                        @Override
                        public String getQueryString() {
                            return attributeExample.getExampleJpql() + selectExpression;
                        }
                    }));
                    if (queryBuilder.statementType != DbmsStatementType.INSERT && needsCastParameters) {
                        arguments.add(new StringLiteral(attributeExample.getAttribute().getColumnTypes()[0]));
                    }
                    selectInfo.set(new FunctionExpression(NullfnFunction.FUNCTION_NAME, arguments, selectExpression));
                }
            }
        } else if (selectExpression instanceof ParameterExpression && clause != ClauseType.SET) {
            if (BasicCastTypes.TYPES.contains(elementType) && queryBuilder.statementType != DbmsStatementType.INSERT) {
                // We also need a cast for parameter expressions except in the SET clause
                List<Expression> arguments = new ArrayList<>(2);
                arguments.add(selectExpression);
                if (columnType != null) {
                    arguments.add(new StringLiteral(columnType));
                }
                selectInfo.set(new FunctionExpression("CAST_" + elementType.getSimpleName(), arguments, selectExpression));
            } else {
                final EntityMetamodelImpl.AttributeExample attributeExample = metamodel.getBasicTypeExampleAttributes().get(elementType);
                if (attributeExample != null) {
                    List<Expression> arguments = new ArrayList<>(2);
                    arguments.add(new SubqueryExpression(new Subquery() {

                        @Override
                        public String getQueryString() {
                            return attributeExample.getExampleJpql() + selectExpression;
                        }
                    }));
                    if (queryBuilder.statementType != DbmsStatementType.INSERT && needsCastParameters) {
                        arguments.add(new StringLiteral(attributeExample.getAttribute().getColumnTypes()[0]));
                    }
                    selectInfo.set(new FunctionExpression(ParamFunction.FUNCTION_NAME, arguments, selectExpression));
                }
            }
        }
    }
}

Example 2 with JpaMetamodelAccessor

use of com.blazebit.persistence.spi.JpaMetamodelAccessor in project blaze-persistence by Blazebit.

the class AbstractInsertCollectionCriteriaBuilder method getForeignKeyParticipatingQueries.

protected Collection<Query> getForeignKeyParticipatingQueries() {
    Map<String, Query> map = null;
    JpaMetamodelAccessor jpaMetamodelAccessor = mainQuery.jpaProvider.getJpaMetamodelAccessor();
    for (String attributeName : bindingMap.keySet()) {
        ExtendedAttribute<?, ?> attribute = collectionAttributeEntries.get(attributeName);
        if (attribute == null) {
            continue;
        }
        for (Attribute<?, ?> attributePart : attribute.getAttributePath()) {
            if (attributePart instanceof SingularAttribute<?, ?>) {
                SingularAttribute<?, ?> singularAttribute = (SingularAttribute<?, ?>) attributePart;
                if (map == null) {
                    map = new HashMap<>();
                }
                if (singularAttribute.getType() instanceof EntityType<?>) {
                    String entityName = ((EntityType<?>) singularAttribute.getType()).getName();
                    if (!map.containsKey(entityName)) {
                        map.put(entityName, em.createQuery("select e from " + entityName + " e"));
                    }
                    break;
                }
            }
        }
    }
    return map == null ? Collections.<Query>emptyList() : map.values();
}

Example 3 with JpaMetamodelAccessor

use of com.blazebit.persistence.spi.JpaMetamodelAccessor in project blaze-persistence by Blazebit.

the class AbstractModificationCriteriaBuilder method getExampleQuery.

private TypedQuery<Object[]> getExampleQuery(List<List<Attribute<?, ?>>> attributes) {
    StringBuilder sb = new StringBuilder();
    StringBuilder joinSb = new StringBuilder();
    sb.append("SELECT ");
    boolean first = true;
    for (List<Attribute<?, ?>> attrPath : attributes) {
        Attribute<?, ?> lastPathElem = attrPath.get(attrPath.size() - 1);
        if (first) {
            first = false;
        } else {
            sb.append(",");
        }
        // TODO: actually we should also check if the attribute is a @GeneratedValue
        if (!mainQuery.dbmsDialect.supportsReturningColumns() && !JpaMetamodelUtils.getSingleIdAttribute(entityType).equals(lastPathElem)) {
            throw new IllegalArgumentException("Returning the query attribute [" + lastPathElem.getName() + "] is not supported by the dbms, only generated keys can be returned!");
        }
        JpaMetamodelAccessor jpaMetamodelAccessor = mainQuery.jpaProvider.getJpaMetamodelAccessor();
        if (jpaMetamodelAccessor.isJoinable(lastPathElem)) {
            sb.append(entityAlias).append('.');
            // We have to map *-to-one relationships to their ids
            EntityType<?> type = mainQuery.metamodel.entity(JpaMetamodelUtils.resolveFieldClass(entityType.getJavaType(), lastPathElem));
            Attribute<?, ?> idAttribute = JpaMetamodelUtils.getSingleIdAttribute(type);
            // NOTE: Since we are talking about *-to-ones, the expression can only be a path to an object
            // so it is safe to just append the id to the path
            sb.append(lastPathElem.getName()).append('.').append(idAttribute.getName());
        } else {
            String startAlias = entityAlias;
            int startIndex = 0;
            // To support this, we need to add a join to the example query
            for (int i = 0; i < attrPath.size(); i++) {
                if (attrPath.get(i).isCollection()) {
                    startAlias = attrPath.get(i).getName();
                    startIndex = i + 1;
                    joinSb.append(" JOIN ").append(entityAlias).append(".").append(startAlias).append(" ").append(startAlias);
                    break;
                }
            }
            sb.append(startAlias).append('.');
            sb.append(attrPath.get(startIndex).getName());
            for (int i = startIndex + 1; i < attrPath.size(); i++) {
                sb.append('.').append(attrPath.get(i).getName());
            }
        }
    }
    sb.append(" FROM ");
    sb.append(entityType.getName()).append(' ').append(entityAlias);
    sb.append(joinSb);
    String exampleQueryString = sb.toString();
    return em.createQuery(exampleQueryString, Object[].class);
}

Example 4 with JpaMetamodelAccessor

use of com.blazebit.persistence.spi.JpaMetamodelAccessor in project blaze-persistence by Blazebit.

the class AbstractModificationCriteriaBuilder method getAndCheckAttributes.

private List<List<Attribute<?, ?>>> getAndCheckAttributes(String[] attributes) {
    List<List<Attribute<?, ?>>> attrs = new ArrayList<List<Attribute<?, ?>>>(attributes.length);
    for (int i = 0; i < attributes.length; i++) {
        if (attributes[i] == null) {
            throw new NullPointerException("attribute at position " + i);
        }
        if (attributes[i].isEmpty()) {
            throw new IllegalArgumentException("empty attribute at position " + i);
        }
        JpaMetamodelAccessor jpaMetamodelAccessor = mainQuery.jpaProvider.getJpaMetamodelAccessor();
        attrs.add(jpaMetamodelAccessor.getBasicAttributePath(getMetamodel(), entityType, attributes[i]).getAttributes());
    }
    return attrs;
}

Example 5 with JpaMetamodelAccessor

use of com.blazebit.persistence.spi.JpaMetamodelAccessor in project blaze-persistence by Blazebit.

the class JoinManager method implicitJoinSingle.

private JoinResult implicitJoinSingle(JoinNode baseNode, String attributeName, String treatTypeName, JoinType joinType, JoinNode currentJoinNode, boolean objectLeafAllowed, boolean joinRequired, boolean joinAllowed, boolean singularJoinAllowed) {
    JoinNode newBaseNode;
    String field;
    Type<?> type;
    boolean lazy = false;
    Type<?> baseNodeType = baseNode.getNodeType();
    // The given path may be relative to the root or it might be an alias
    if (objectLeafAllowed) {
        AttributeHolder attributeHolder = JpaUtils.getAttributeForJoining(metamodel, baseNodeType, expressionFactory.createJoinPathExpression(attributeName), null);
        Attribute<?, ?> attr = attributeHolder.getAttribute();
        if (attr == null) {
            throw new IllegalArgumentException("Field with name '" + attributeName + "' was not found within managed type " + JpaMetamodelUtils.getTypeName(baseNodeType));
        }
        if (joinRequired || attr.isCollection()) {
            final JoinResult newBaseNodeResult = implicitJoinSingle(baseNode, attributeName, treatTypeName, joinType, currentJoinNode, false, joinAllowed, singularJoinAllowed);
            newBaseNode = newBaseNodeResult.baseNode;
            // check if the last path element was also joined
            if (newBaseNode != baseNode) {
                field = null;
                type = newBaseNode.getNodeType();
            } else {
                field = attributeName;
                type = attributeHolder.getAttributeType();
            }
        } else {
            newBaseNode = baseNode;
            field = attributeName;
            type = attributeHolder.getAttributeType();
            lazy = true;
        }
    } else {
        JpaMetamodelAccessor jpaMetamodelAccessor = mainQuery.jpaProvider.getJpaMetamodelAccessor();
        AttributeHolder attributeHolder = JpaUtils.getAttributeForJoining(metamodel, baseNodeType, expressionFactory.createJoinPathExpression(attributeName), null);
        Attribute<?, ?> attr = attributeHolder.getAttribute();
        if (attr == null) {
            throw new IllegalArgumentException("Field with name " + attributeName + " was not found within class " + JpaMetamodelUtils.getTypeName(baseNodeType));
        }
        if (jpaMetamodelAccessor.isJoinable(attr)) {
            if (jpaMetamodelAccessor.isCompositeNode(attr)) {
                throw new IllegalArgumentException("No object leaf allowed but " + attributeName + " is an object leaf");
            } else {
                final JoinResult newBaseNodeResult = implicitJoinSingle(baseNode, attributeName, treatTypeName, joinType, currentJoinNode, false, joinAllowed, singularJoinAllowed);
                newBaseNode = newBaseNodeResult.baseNode;
                field = null;
                type = newBaseNode.getNodeType();
            }
        } else {
            newBaseNode = baseNode;
            field = attributeName;
            type = attributeHolder.getAttributeType();
        }
    }
    return new JoinResult(newBaseNode, field == null ? null : Arrays.asList(field), type, -1, -1, lazy);
}