Examples with MapKeyExpression com.blazebit.persistence.parser.expression.MapKeyExpression used on opensource projects

Example 1 with MapKeyExpression

use of com.blazebit.persistence.parser.expression.MapKeyExpression in project blaze-persistence by Blazebit.

the class JoinManager method implicitJoin.

private JoinResult implicitJoin(JoinNode current, List<String> resultFields, PathExpression pathExpression, ClauseType fromClause, JoinType joinType, JoinNode currentJoinNode, Set<String> currentlyResolvingAliases, int start, int end, boolean allowParentAliases, boolean joinAllowed, boolean singularJoinAllowed, boolean idRemovable) {
    List<PathElementExpression> pathElements = pathExpression.getExpressions();
    PathElementExpression elementExpr;
    int singleValuedAssociationNameStartIndex = -1;
    int singleValuedAssociationNameEndIndex = -1;
    for (int i = start; i < end; i++) {
        AliasInfo aliasInfo;
        elementExpr = pathElements.get(i);
        if (elementExpr instanceof ArrayExpression) {
            ArrayExpression arrayExpr = (ArrayExpression) elementExpr;
            String joinRelationName;
            List<String> joinRelationAttributes;
            if (!resultFields.isEmpty()) {
                resultFields.add(arrayExpr.getBase().toString());
                joinRelationAttributes = resultFields;
                resultFields = new ArrayList<>();
                joinRelationName = StringUtils.join(".", joinRelationAttributes);
            } else {
                joinRelationName = arrayExpr.getBase().toString();
                joinRelationAttributes = Arrays.asList(joinRelationName);
            }
            current = current == null ? getRootNodeOrFail("Ambiguous join path [", joinRelationName, "] because of multiple root nodes!") : current;
            implicitJoinIndex(arrayExpr);
            // Find a node by a predicate match
            JoinNode matchingNode = findNode(current, joinRelationName, arrayExpr);
            if (matchingNode != null) {
                current = matchingNode;
            } else if (i == 0 && (aliasInfo = aliasManager.getAliasInfoForBottomLevel(joinRelationName)) != null) {
                // The first node is allowed to be a join alias
                if (aliasInfo instanceof SelectInfo) {
                    throw new IllegalArgumentException("Illegal reference to the select alias '" + joinRelationName + "'");
                }
                current = ((JoinAliasInfo) aliasInfo).getJoinNode();
                generateAndApplyOnPredicate(current, arrayExpr);
            } else {
                String joinAlias = getJoinAlias(arrayExpr);
                if (arrayExpr.getBase() instanceof PropertyExpression) {
                    final JoinResult result = createOrUpdateNode(current, joinRelationAttributes, null, joinAlias, joinType, currentJoinNode, true, false, joinAllowed, singularJoinAllowed);
                    current = result.baseNode;
                    resultFields = result.addToList(resultFields);
                } else {
                    joinAlias = aliasManager.generateJoinAlias(joinAlias);
                    Class<?> entityClass = ((EntityLiteral) arrayExpr.getBase()).getValue();
                    joinOn(null, current.getAlias(), entityClass, joinAlias, JoinType.LEFT, false).end();
                    current = ((JoinAliasInfo) aliasManager.getAliasInfo(joinAlias)).getJoinNode();
                }
                generateAndApplyOnPredicate(current, arrayExpr);
            }
        } else if (elementExpr instanceof TreatExpression) {
            if (i != 0 || current != null) {
                throw new IllegalArgumentException("A treat expression should be the first element in a path!");
            }
            TreatExpression treatExpression = (TreatExpression) elementExpr;
            boolean fromSubquery = false;
            boolean fromSelectAlias = false;
            boolean joinRequired = false;
            boolean fetch = false;
            current = implicitJoinTreatExpression((TreatExpression) elementExpr, joinAllowed, singularJoinAllowed, fromClause, joinType, currentJoinNode, currentlyResolvingAliases, fromSubquery, fromSelectAlias, true, false, fetch, false);
        } else if (elementExpr instanceof MapKeyExpression) {
            MapKeyExpression mapKeyExpression = (MapKeyExpression) elementExpr;
            boolean fromSubquery = false;
            boolean fromSelectAlias = false;
            boolean joinRequired = true;
            boolean fetch = false;
            current = joinMapKey(mapKeyExpression, null, fromClause, currentlyResolvingAliases, fromSubquery, fromSelectAlias, joinRequired, fetch, true, true);
        } else if (elementExpr instanceof MapValueExpression) {
            MapValueExpression mapValueExpression = (MapValueExpression) elementExpr;
            boolean fromSubquery = false;
            boolean fromSelectAlias = false;
            boolean joinRequired = true;
            boolean fetch = false;
            implicitJoin(mapValueExpression.getPath(), joinAllowed, singularJoinAllowed, true, null, fromClause, currentlyResolvingAliases, fromSubquery, fromSelectAlias, joinRequired, fetch);
            current = (JoinNode) mapValueExpression.getPath().getBaseNode();
        } else if (pathElements.size() == 1 && (aliasInfo = aliasManager.getAliasInfoForBottomLevel(elementExpr.toString())) != null) {
            if (aliasInfo instanceof SelectInfo) {
                throw new IllegalArgumentException("Can't dereference a select alias");
            } else {
                // Join alias usage like in "joinAlias.relationName"
                current = ((JoinAliasInfo) aliasInfo).getJoinNode();
            }
        } else {
            String elementExpressionString = elementExpr.toString();
            if (current == null) {
                // When no base is given, check if the attribute name is an alias
                aliasInfo = allowParentAliases ? aliasManager.getAliasInfo(elementExpressionString) : aliasManager.getAliasInfoForBottomLevel(elementExpressionString);
                if (aliasInfo instanceof JoinAliasInfo) {
                    current = ((JoinAliasInfo) aliasInfo).getJoinNode();
                    // We can only "consider" this path a single valued association id when we are about to "remove" the id part
                    if (idRemovable && current.getNodeType() instanceof ManagedType<?> && pathElements.size() == i + 2) {
                        ExtendedManagedType<?> managedType = metamodel.getManagedType(ExtendedManagedType.class, current.getManagedType());
                        if (contains(managedType.getIdAttributes(), pathElements.get(i + 1))) {
                            singleValuedAssociationNameStartIndex = 0;
                            singleValuedAssociationNameEndIndex = 0;
                            break;
                        }
                    }
                    continue;
                } else {
                    current = getRootNodeOrFail("Ambiguous join path [", elementExpressionString, "] because of multiple root nodes!");
                }
            }
            int pathElementsSize = pathElements.size();
            if (joinType != JoinType.INNER && (idRemovable || mainQuery.jpaProvider.supportsSingleValuedAssociationIdExpressions()) && (current.getManagedType().getPersistenceType() != Type.PersistenceType.EMBEDDABLE || current.getValuesLikeAttribute() != null) && i + 1 < pathElementsSize) {
                // If the current type is not an embeddable, we check if the path elements access a singular association id
                List<PathElementExpression> pathElementExpressions = new ArrayList<>(pathElementsSize - i);
                for (int j = i; j < pathElementsSize; j++) {
                    PathElementExpression pathElementExpression = pathElements.get(j);
                    if (!(pathElementExpression instanceof PropertyExpression)) {
                        break;
                    }
                    pathElementExpressions.add(pathElementExpression);
                }
                ExtendedManagedType<?> extendedManagedType = metamodel.getManagedType(ExtendedManagedType.class, current.getManagedType());
                // We collect and check if we have only property expressions
                if (pathElementExpressions.size() == pathElementsSize - i) {
                    // Only if all path elements are property expressions, we check if this is single valued association id
                    PathExpression pathRestExpression = new PathExpression(pathElementExpressions);
                    String pathRestString = pathRestExpression.toString();
                    int idx = 0;
                    ExtendedAttribute<?, ?> extendedAttribute;
                    if (current.getValuesLikeAttribute() == null) {
                        extendedAttribute = extendedManagedType.getOwnedSingularAttributes().get(pathRestString);
                    } else {
                        extendedAttribute = extendedManagedType.getAttributes().get(pathRestString);
                    }
                    if (extendedAttribute != null && !JpaMetamodelUtils.isAssociation(extendedAttribute.getAttribute())) {
                        ExtendedAttribute<?, ?> associationAttribute = null;
                        ExtendedAttribute<?, ?> attr;
                        singleValuedAssociationNameStartIndex = i;
                        List<String> newResultFields = new ArrayList<>();
                        for (int j = i; j < end; j++) {
                            idx = pathRestString.indexOf('.', idx + 1);
                            if (idx != -1 && JpaMetamodelUtils.isAssociation((attr = extendedManagedType.getAttribute(pathRestString.substring(0, idx))).getAttribute())) {
                                associationAttribute = attr;
                                singleValuedAssociationNameEndIndex = j;
                            }
                            newResultFields.add(pathElements.get(j).toString());
                        }
                        if (singleValuedAssociationNameEndIndex == -1) {
                            // The expression ends at an association, so this can't be a single valued association id expression
                            singleValuedAssociationNameStartIndex = -1;
                        } else if (current.getValueType() == null && mainQuery.jpaProvider.isForeignJoinColumn((EntityType<?>) current.getManagedType(), new PathExpression(pathElements.subList(singleValuedAssociationNameStartIndex, singleValuedAssociationNameEndIndex + 1)).toString()) || current.getValueType() != null && mainQuery.jpaProvider.isForeignJoinColumn(current.getValueType(), current.getValuesLikeAttribute() + "." + new PathExpression(pathElements.subList(singleValuedAssociationNameStartIndex, singleValuedAssociationNameEndIndex + 1)).toString())) {
                            // If the column is "foreign", we can't do any optimizations
                            singleValuedAssociationNameStartIndex = -1;
                        } else if (!mainQuery.jpaProvider.supportsSingleValuedAssociationNaturalIdExpressions() && !contains(metamodel.getManagedType(ExtendedManagedType.class, associationAttribute.getElementClass()), new PathExpression(pathElements.subList(singleValuedAssociationNameEndIndex + 1, pathElementsSize)))) {
                            // If the jpa provider doesn't support any optimizations, we are done
                            singleValuedAssociationNameStartIndex = -1;
                        } else {
                            resultFields.addAll(newResultFields);
                            break;
                        }
                    }
                }
            }
            if (resultFields.isEmpty()) {
                final JoinResult result = implicitJoinSingle(current, elementExpressionString, null, joinType, currentJoinNode, allowParentAliases, joinAllowed, singularJoinAllowed);
                if (current != result.baseNode) {
                    current = result.baseNode;
                }
                resultFields = result.addToList(resultFields);
            } else {
                resultFields.add(elementExpressionString);
                JoinResult currentResult = createOrUpdateNode(current, resultFields, null, null, joinType, currentJoinNode, true, true, joinAllowed, singularJoinAllowed);
                current = currentResult.baseNode;
                if (!currentResult.hasField()) {
                    resultFields.clear();
                }
            }
        }
    }
    if (resultFields.isEmpty()) {
        return new JoinResult(current, null, current == null ? null : current.getNodeType(), singleValuedAssociationNameStartIndex, singleValuedAssociationNameEndIndex);
    } else {
        List<PathElementExpression> pathElementExpressions = new ArrayList<>(resultFields.size());
        for (int i = 0; i < resultFields.size(); i++) {
            pathElementExpressions.add(new PropertyExpression(resultFields.get(i)));
        }
        Expression expression = new PathExpression(pathElementExpressions);
        Type<?> type = JpaUtils.getAttributeForJoining(metamodel, current.getNodeType(), expression, null).getAttributeType();
        return new JoinResult(current, resultFields, type, singleValuedAssociationNameStartIndex, singleValuedAssociationNameEndIndex);
    }
}

Example 2 with MapKeyExpression

use of com.blazebit.persistence.parser.expression.MapKeyExpression in project blaze-persistence by Blazebit.

the class JoinManager method join.

JoinNode join(Expression expr, String alias, JoinType type, boolean fetch, boolean defaultJoin, String deReferenceFunction) {
    PathElementExpression elementExpr;
    String treatType = null;
    JoinResult result;
    JoinNode current;
    if (type == JoinType.FULL) {
        hasFullJoin = true;
    }
    if (expr instanceof PathExpression) {
        PathExpression pathExpression = (PathExpression) expr;
        if (isExternal(pathExpression) || isJoinableSelectAlias(pathExpression, false, false)) {
            throw new IllegalArgumentException("No external path or select alias allowed in join path");
        }
        List<PathElementExpression> pathElements = pathExpression.getExpressions();
        elementExpr = pathElements.get(pathElements.size() - 1);
        result = implicitJoin(null, pathExpression, null, null, null, new HashSet<String>(), 0, pathElements.size() - 1, false, true, true, false);
        current = result.baseNode;
    } else if (expr instanceof QualifiedExpression) {
        elementExpr = (PathElementExpression) expr;
        result = null;
        current = null;
    } else if (expr instanceof TreatExpression) {
        TreatExpression treatExpression = (TreatExpression) expr;
        if (isExternal(treatExpression)) {
            throw new IllegalArgumentException("No external path or select alias allowed in join path");
        }
        Expression expression = treatExpression.getExpression();
        if (expression instanceof PathExpression) {
            PathExpression pathExpression = (PathExpression) expression;
            List<PathElementExpression> pathElements = pathExpression.getExpressions();
            elementExpr = pathElements.get(pathElements.size() - 1);
            result = implicitJoin(null, pathExpression, null, null, null, new HashSet<String>(), 0, pathElements.size() - 1, false, true, true, false);
            current = result.baseNode;
            treatType = treatExpression.getType();
        } else {
            throw new IllegalArgumentException("Unexpected expression type[" + expression.getClass().getSimpleName() + "] in treat expression: " + treatExpression);
        }
    } else {
        throw new IllegalArgumentException("Join path [" + expr + "] is not a path");
    }
    if (elementExpr instanceof ArrayExpression) {
        ArrayExpression arrayExpr = (ArrayExpression) elementExpr;
        implicitJoinIndex(arrayExpr);
        if (arrayExpr.getBase() instanceof PropertyExpression) {
            List<String> resultFields = result.addToList(new ArrayList<String>());
            current = current == null ? getRootNodeOrFail("Could not join path [", expr, "] because it did not use an absolute path but multiple root nodes are available!") : current;
            resultFields.add(arrayExpr.getBase().toString());
            result = createOrUpdateNode(current, resultFields, treatType, alias, type, null, false, defaultJoin, true, true);
        } else {
            Class<?> entityClass = ((EntityLiteral) arrayExpr.getBase()).getValue();
            joinOn(null, rootNodes.get(0).getAlias(), entityClass, alias, JoinType.LEFT, false).end();
            result = new JoinResult(((JoinAliasInfo) aliasManager.getAliasInfo(alias)).getJoinNode());
        }
        generateAndApplyOnPredicate(result.baseNode, arrayExpr);
    } else if (elementExpr instanceof MapKeyExpression) {
        MapKeyExpression mapKeyExpression = (MapKeyExpression) elementExpr;
        boolean fromSubquery = false;
        boolean fromSelectAlias = false;
        boolean joinRequired = true;
        current = joinMapKey(mapKeyExpression, alias, null, new HashSet<String>(), fromSubquery, fromSelectAlias, joinRequired, fetch, false, defaultJoin);
        result = new JoinResult(current);
    } else {
        List<String> joinRelationAttributes = result.addToList(new ArrayList<String>());
        joinRelationAttributes.add(elementExpr.toString());
        current = current == null ? getRootNodeOrFail("Could not join path [", expr, "] because it did not use an absolute path but multiple root nodes are available!") : current;
        result = createOrUpdateNode(current, joinRelationAttributes, treatType, alias, type, null, false, defaultJoin, true, true);
    }
    result.baseNode.setDeReferenceFunction(deReferenceFunction);
    if (fetch) {
        fetchPath(result.baseNode);
    }
    return result.baseNode;
}

Example 3 with MapKeyExpression

use of com.blazebit.persistence.parser.expression.MapKeyExpression in project blaze-persistence by Blazebit.

the class JoinManager method getArrayExpressionPredicate.

private Predicate getArrayExpressionPredicate(JoinNode joinNode, ArrayExpression arrayExpr) {
    if (arrayExpr.getIndex() instanceof Predicate) {
        return (Predicate) arrayExpr.getIndex();
    } else {
        PathExpression keyPath = new PathExpression(new ArrayList<PathElementExpression>(), true);
        keyPath.getExpressions().add(new PropertyExpression(joinNode.getAliasInfo().getAlias()));
        keyPath.setPathReference(new SimplePathReference(joinNode, null, joinNode.getNodeType()));
        Attribute<?, ?> arrayBaseAttribute = joinNode.getParentTreeNode().getAttribute();
        Expression keyExpression;
        if (arrayBaseAttribute instanceof ListAttribute<?, ?>) {
            keyExpression = new ListIndexExpression(keyPath);
        } else {
            keyExpression = new MapKeyExpression(keyPath);
        }
        return new EqPredicate(keyExpression, arrayExpr.getIndex());
    }
}

Example 4 with MapKeyExpression

use of com.blazebit.persistence.parser.expression.MapKeyExpression in project blaze-persistence by Blazebit.

the class JoinNode method createExpression.

public Expression createExpression(String field, boolean asPath) {
    List<PathElementExpression> pathElements = new ArrayList<>();
    if (qualificationExpression != null) {
        List<PathElementExpression> pathElementExpressions = new ArrayList<>(1);
        pathElementExpressions.add(new PropertyExpression(parent.getAlias()));
        PathExpression path = new PathExpression(pathElementExpressions);
        if ("KEY".equalsIgnoreCase(qualificationExpression)) {
            pathElements.add(new MapKeyExpression(path));
        } else if ("INDEX".equalsIgnoreCase(qualificationExpression)) {
            pathElements.add(new ListIndexExpression(path));
        } else if ("ENTRY".equalsIgnoreCase(qualificationExpression)) {
            pathElements.add(new MapEntryExpression(path));
        }
    } else {
        pathElements.add(new PropertyExpression(aliasInfo.getAlias()));
    }
    if (field != null) {
        for (String fieldPart : field.split("\\.")) {
            pathElements.add(new PropertyExpression(fieldPart));
        }
    }
    if (!asPath && valuesTypeName != null) {
        return new FunctionExpression("FUNCTION", Arrays.asList(new StringLiteral("TREAT_" + valuesTypeName.toUpperCase()), new PathExpression(pathElements)));
    } else {
        return new PathExpression(pathElements);
    }
}

Example 5 with MapKeyExpression

use of com.blazebit.persistence.parser.expression.MapKeyExpression in project blaze-persistence by Blazebit.

the class AbstractAttribute method checkAttribute.

public void checkAttribute(ManagedType<?> managedType, MetamodelBuildingContext context) {
    Class<?> expressionType = getJavaType();
    Class<?> keyType = null;
    Class<?> elementType = null;
    ManagedType<?> elementManagedType;
    javax.persistence.metamodel.Attribute<?, ?> elementAttribute;
    if (possibleTargetTypes.size() != 1) {
        if (getElementType() instanceof ManagedViewType<?>) {
            elementManagedType = context.getEntityMetamodel().getManagedType(((ManagedViewType<?>) getElementType()).getEntityClass());
        } else {
            elementManagedType = context.getEntityMetamodel().getManagedType(getElementType().getJavaType());
        }
        elementAttribute = null;
    } else {
        elementManagedType = context.getEntityMetamodel().getManagedType(possibleTargetTypes.get(0).getLeafBaseValueClass());
        elementAttribute = possibleTargetTypes.get(0).getLeafMethod();
    }
    ScalarTargetResolvingExpressionVisitor visitor = new ScalarTargetResolvingExpressionVisitor(elementManagedType, elementAttribute, context.getEntityMetamodel(), context.getJpqlFunctions(), declaringType.getEntityViewRootTypes());
    if (fetches.length != 0) {
        if (context.getEntityMetamodel().getManagedType(getElementType().getJavaType()) == null) {
            context.addError("Specifying fetches for non-entity attribute type [" + Arrays.toString(fetches) + "] at the " + getLocation() + " is not allowed!");
        } else {
            for (int i = 0; i < fetches.length; i++) {
                final String fetch = fetches[i];
                final String errorLocation;
                if (fetches.length == 1) {
                    errorLocation = "the fetch expression";
                } else {
                    errorLocation = "the " + (i + 1) + ". fetch expression";
                }
                visitor.clear();
                try {
                    // Validate the fetch expression parses
                    context.getExpressionFactory().createPathExpression(fetch).accept(visitor);
                } catch (SyntaxErrorException ex) {
                    try {
                        context.getExpressionFactory().createSimpleExpression(fetch, false, false, true);
                        // The used expression is not usable for fetches
                        context.addError("Invalid fetch expression '" + fetch + "' of the " + getLocation() + ". Simplify the fetch expression to a simple path expression. Encountered error: " + ex.getMessage());
                    } catch (SyntaxErrorException ex2) {
                        // This is a real syntax error
                        context.addError("Syntax error in " + errorLocation + " '" + fetch + "' of the " + getLocation() + ": " + ex.getMessage());
                    }
                } catch (IllegalArgumentException ex) {
                    context.addError("An error occurred while trying to resolve the " + errorLocation + " '" + fetch + "' of the " + getLocation() + ": " + ex.getMessage());
                }
            }
        }
    }
    if (limitExpression != null) {
        try {
            Expression inItemExpression = context.getTypeValidationExpressionFactory().createInItemExpression(limitExpression);
            if (!(inItemExpression instanceof ParameterExpression) && !(inItemExpression instanceof NumericLiteral) || inItemExpression instanceof NumericLiteral && ((NumericLiteral) inItemExpression).getNumericType() != NumericType.INTEGER) {
                context.addError("Syntax error in the limit expression '" + limitExpression + "' of the " + getLocation() + ": The expression must be a integer literal or a parameter expression");
            }
        } catch (SyntaxErrorException ex) {
            context.addError("Syntax error in the limit expression '" + limitExpression + "' of the " + getLocation() + ": " + ex.getMessage());
        } catch (IllegalArgumentException ex) {
            context.addError("An error occurred while trying to resolve the limit expression '" + limitExpression + "' of the " + getLocation() + ": " + ex.getMessage());
        }
        try {
            Expression inItemExpression = context.getTypeValidationExpressionFactory().createInItemExpression(offsetExpression);
            if (!(inItemExpression instanceof ParameterExpression) && !(inItemExpression instanceof NumericLiteral) || inItemExpression instanceof NumericLiteral && ((NumericLiteral) inItemExpression).getNumericType() != NumericType.INTEGER) {
                context.addError("Syntax error in the offset expression '" + offsetExpression + "' of the " + getLocation() + ": The expression must be a integer literal or a parameter expression");
            }
        } catch (SyntaxErrorException ex) {
            context.addError("Syntax error in the offset expression '" + offsetExpression + "' of the " + getLocation() + ": " + ex.getMessage());
        } catch (IllegalArgumentException ex) {
            context.addError("An error occurred while trying to resolve the offset expression '" + offsetExpression + "' of the " + getLocation() + ": " + ex.getMessage());
        }
        for (int i = 0; i < orderByItems.size(); i++) {
            OrderByItem orderByItem = orderByItems.get(i);
            String expression = orderByItem.getExpression();
            try {
                visitor.clear();
                context.getTypeValidationExpressionFactory().createSimpleExpression(expression, false, false, true).accept(visitor);
            } catch (SyntaxErrorException ex) {
                context.addError("Syntax error in the " + (i + 1) + "th order by expression '" + expression + "' of the " + getLocation() + ": " + ex.getMessage());
            } catch (IllegalArgumentException ex) {
                context.addError("An error occurred while trying to resolve the " + (i + 1) + "th order by expression '" + expression + "' of the " + getLocation() + ": " + ex.getMessage());
            }
        }
    }
    if (fetchStrategy == FetchStrategy.MULTISET) {
        if (getElementType() instanceof ManagedViewTypeImplementor<?> && ((ManagedViewTypeImplementor<?>) getElementType()).hasJpaManagedAttributes()) {
            context.addError("Using the MULTISET fetch strategy is not allowed when the subview contains attributes with entity types. MULTISET at the " + getLocation() + " is not allowed!");
        } else if (getElementType() instanceof BasicTypeImpl<?> && ((BasicTypeImpl<?>) getElementType()).isJpaManaged()) {
            context.addError("Using the MULTISET fetch strategy is not allowed with entity types. MULTISET at the " + getLocation() + " is not allowed!");
        }
    }
    Expression indexExpression = null;
    if (isCollection()) {
        elementType = getElementType().getJavaType();
        if (!isUpdatable()) {
            // Updatable collection attributes are specially handled in the type compatibility check
            if (isIndexed()) {
                if (getCollectionType() == PluralAttribute.CollectionType.MAP) {
                    expressionType = Collection.class;
                    keyType = getKeyType().getJavaType();
                } else {
                    expressionType = Collection.class;
                    keyType = Integer.class;
                }
            } else {
                // We can assign e.g. a Set to a List, so let's use the common supertype
                expressionType = Collection.class;
            }
        }
        if (isIndexed()) {
            if (getCollectionType() == PluralAttribute.CollectionType.MAP) {
                indexExpression = getKeyMappingExpression();
                String[] keyFetches = getKeyFetches();
                if (keyFetches.length != 0) {
                    ManagedType<?> managedKeyType = context.getEntityMetamodel().getManagedType(getKeyType().getJavaType());
                    if (managedKeyType == null) {
                        context.addError("Specifying key fetches for non-entity attribute key type [" + Arrays.toString(keyFetches) + "] at the " + getLocation() + " is not allowed!");
                    } else {
                        ScalarTargetResolvingExpressionVisitor keyVisitor = new ScalarTargetResolvingExpressionVisitor(managedKeyType, context.getEntityMetamodel(), context.getJpqlFunctions(), declaringType.getEntityViewRootTypes());
                        for (int i = 0; i < keyFetches.length; i++) {
                            final String fetch = keyFetches[i];
                            final String errorLocation;
                            if (keyFetches.length == 1) {
                                errorLocation = "the key fetch expression";
                            } else {
                                errorLocation = "the " + (i + 1) + ". key fetch expression";
                            }
                            keyVisitor.clear();
                            try {
                                // Validate the fetch expression parses
                                context.getExpressionFactory().createPathExpression(fetch).accept(keyVisitor);
                            } catch (SyntaxErrorException ex) {
                                try {
                                    context.getExpressionFactory().createSimpleExpression(fetch, false, false, true);
                                    // The used expression is not usable for fetches
                                    context.addError("Invalid key fetch expression '" + fetch + "' of the " + getLocation() + ". Simplify the key fetch expression to a simple path expression. Encountered error: " + ex.getMessage());
                                } catch (SyntaxErrorException ex2) {
                                    // This is a real syntax error
                                    context.addError("Syntax error in " + errorLocation + " '" + fetch + "' of the " + getLocation() + ": " + ex.getMessage());
                                }
                            } catch (IllegalArgumentException ex) {
                                context.addError("An error occurred while trying to resolve the " + errorLocation + " '" + fetch + "' of the " + getLocation() + ": " + ex.getMessage());
                            }
                        }
                    }
                }
            } else {
                indexExpression = getMappingIndexExpression();
            }
        }
    }
    if (isSubview()) {
        ManagedViewTypeImplementor<?> subviewType = (ManagedViewTypeImplementor<?>) getElementType();
        if (isCollection()) {
            elementType = subviewType.getEntityClass();
        } else {
            expressionType = subviewType.getEntityClass();
        }
    } else {
        // If we determined, that the java type is a basic type, let's double check if the user didn't do something wrong
        Class<?> elementJavaType = getElementType().getJavaType();
        if ((elementJavaType.getModifiers() & Modifier.ABSTRACT) != 0) {
            // If the element type has an entity view annotation, although it is considered basic, we throw an error as this means, the view was probably not registered
            if (!isQueryParameter() && AnnotationUtils.findAnnotation(elementJavaType, EntityView.class) != null && getElementType().getConvertedType() == null) {
                context.addError("The element type '" + elementJavaType.getName() + "' is considered basic although the class is annotated with @EntityView. Add a type converter or add the java class to the entity view configuration! Problematic attribute " + getLocation());
            }
        }
    }
    if (isKeySubview()) {
        keyType = ((ManagedViewTypeImplementor<?>) getKeyType()).getEntityClass();
    }
    if (keyType != null) {
        validateTypesCompatible(possibleIndexTargetTypes, keyType, null, isUpdatable(), true, context, ExpressionLocation.MAPPING_INDEX, getLocation());
    }
    if (isCorrelated()) {
        // Validate that resolving "correlationBasis" on "managedType" is valid
        validateTypesCompatible(managedType, correlationBasisExpression, Object.class, null, false, true, declaringType.getEntityViewRootTypes(), context, ExpressionLocation.CORRELATION_BASIS, getLocation());
        if (correlated != null) {
            // Validate that resolving "correlationResult" on "correlated" is compatible with "expressionType" and "elementType"
            validateTypesCompatible(possibleTargetTypes, expressionType, elementType, false, !isCollection(), context, ExpressionLocation.CORRELATION_RESULT, getLocation());
            Predicate correlationPredicate = getCorrelationPredicate();
            if (correlationPredicate != null) {
                ExpressionFactory ef = context.getTypeValidationExpressionFactory();
                // First we need to prefix the correlation basis expression with an alias because we use that in the predicate
                PrefixingQueryGenerator prefixingQueryGenerator = new PrefixingQueryGenerator(ef, correlationKeyAlias, null, null, declaringType.getEntityViewRootTypes().keySet(), false, false);
                prefixingQueryGenerator.setQueryBuffer(new StringBuilder());
                correlationBasisExpression.accept(prefixingQueryGenerator);
                // Next we replace the plain alias usage with the prefixed correlation basis expression
                AliasReplacementVisitor aliasReplacementVisitor = new AliasReplacementVisitor(ef.createSimpleExpression(prefixingQueryGenerator.getQueryBuffer().toString()), correlationKeyAlias);
                correlationPredicate = correlationPredicate.copy(ExpressionCopyContext.EMPTY);
                correlationPredicate.accept(aliasReplacementVisitor);
                // Finally we validate that the expression
                try {
                    Map<String, javax.persistence.metamodel.Type<?>> rootTypes = new HashMap<>(declaringType.getEntityViewRootTypes());
                    rootTypes.put(correlationKeyAlias, managedType);
                    ScalarTargetResolvingExpressionVisitor correlationVisitor = new ScalarTargetResolvingExpressionVisitor(correlated, context.getEntityMetamodel(), context.getJpqlFunctions(), rootTypes);
                    correlationPredicate.accept(correlationVisitor);
                } catch (SyntaxErrorException ex) {
                    context.addError("Syntax error in the condition expression '" + correlationPredicate + "' of the " + getLocation() + ": " + ex.getMessage());
                } catch (IllegalArgumentException ex) {
                    context.addError("An error occurred while trying to resolve the condition expression '" + correlationPredicate + "' of the " + getLocation() + ": " + ex.getMessage());
                }
            }
        }
    } else if (isSubquery()) {
        if (subqueryExpression != null && !subqueryExpression.isEmpty()) {
            // If a converter is applied, we already know that there was a type match with the underlying type
            if (getElementType().getConvertedType() == null) {
                validateTypesCompatible(possibleTargetTypes, expressionType, elementType, false, !isCollection(), context, ExpressionLocation.SUBQUERY_EXPRESSION, getLocation());
            }
        }
    } else if (!isQueryParameter()) {
        // Forcing singular via @MappingSingular
        if (!isCollection() && (Collection.class.isAssignableFrom(expressionType) || Map.class.isAssignableFrom(expressionType))) {
            Class<?>[] typeArguments = getTypeArguments();
            elementType = typeArguments[typeArguments.length - 1];
        }
        // If a converter is applied, we already know that there was a type match with the underlying type
        if (getElementType().getConvertedType() == null) {
            // Validate that resolving "mapping" on "managedType" is compatible with "expressionType" and "elementType"
            validateTypesCompatible(possibleTargetTypes, expressionType, elementType, isUpdatable(), !isCollection(), context, ExpressionLocation.MAPPING, getLocation());
        }
        if (isMutable() && (declaringType.isUpdatable() || declaringType.isCreatable())) {
            UpdatableExpressionVisitor updatableVisitor = new UpdatableExpressionVisitor(context.getEntityMetamodel(), managedType.getJavaType(), isUpdatable(), declaringType.getEntityViewRootTypes());
            try {
                // NOTE: Not supporting "this" here because it doesn't make sense to have an updatable mapping that refers to this
                // The only thing that might be interesting is supporting "this" when we support cascading as properties could be nested
                // But not sure yet if the embeddable attributes would then be modeled as "updatable".
                // I guess these attributes are not "updatable" but that probably depends on the decision regarding collections as they have a similar problem
                // A collection itself might not be "updatable" but it's elements could be. This is roughly the same problem
                mappingExpression.accept(updatableVisitor);
                Map<javax.persistence.metamodel.Attribute<?, ?>, javax.persistence.metamodel.Type<?>> possibleTargets = updatableVisitor.getPossibleTargets();
                if (possibleTargets.size() > 1) {
                    context.addError("Multiple possible target type for the mapping in the " + getLocation() + ": " + possibleTargets);
                }
                // TODO: maybe allow to override this per-attribute?
                if (isDisallowOwnedUpdatableSubview()) {
                    for (Type<?> updateCascadeAllowedSubtype : getUpdateCascadeAllowedSubtypes()) {
                        ManagedViewType<?> managedViewType = (ManagedViewType<?>) updateCascadeAllowedSubtype;
                        if (managedViewType.isUpdatable()) {
                            context.addError("Invalid use of @UpdatableEntityView type '" + managedViewType.getJavaType().getName() + "' for the " + getLocation() + ". Consider using a read-only view type instead or use @AllowUpdatableEntityViews! " + "For further information on this topic, please consult the documentation https://persistence.blazebit.com/documentation/entity-view/manual/en_US/index.html#updatable-mappings-subview");
                        }
                    }
                }
            } catch (IllegalArgumentException ex) {
                context.addError("There is an error for the " + getLocation() + ": " + ex.getMessage());
            }
            if (isUpdatable()) {
                if (isCollection() && getElementCollectionType() != null) {
                    context.addError("The use of a multi-collection i.e. List<Collection<?>> or Map<?, Collection<?>> at the " + getLocation() + " is unsupported for updatable collections!");
                }
            }
            if ((isUpdatable() || isKeySubview() && ((ManagedViewTypeImplementor<?>) getKeyType()).isUpdatable()) && indexExpression != null) {
                boolean invalid;
                if (getCollectionType() == PluralAttribute.CollectionType.MAP) {
                    invalid = !(indexExpression instanceof MapKeyExpression) || !"this".equals(((MapKeyExpression) indexExpression).getPath().getPath());
                } else {
                    invalid = !(indexExpression instanceof ListIndexExpression) || !"this".equals(((ListIndexExpression) indexExpression).getPath().getPath());
                }
                if (invalid) {
                    context.addError("The @MappingIndex at the " + getLocation() + " is a complex mapping and can thus not be updatable!");
                }
            }
        }
    }
}