Examples with ViewRoot com.blazebit.persistence.view.metamodel.ViewRoot used on opensource projects

Example 1 with ViewRoot

use of com.blazebit.persistence.view.metamodel.ViewRoot in project blaze-persistence by Blazebit.

the class ManagedViewTypeImpl method checkAttributes.

@Override
public void checkAttributes(MetamodelBuildingContext context) {
    if (inheritanceMapping != null) {
        ScalarTargetResolvingExpressionVisitor visitor = new ScalarTargetResolvingExpressionVisitor(jpaManagedType, context.getEntityMetamodel(), context.getJpqlFunctions(), viewRootTypes);
        try {
            context.getExpressionFactory().createBooleanExpression(inheritanceMapping, false).accept(visitor);
        } catch (RuntimeException ex) {
            context.addError("Invalid inheritance mapping expression '" + inheritanceMapping + "' on the entity view " + javaType.getName() + ". Encountered error: " + ex.getMessage());
        }
    }
    // Ensure that a plural entity attribute is not used multiple times in different plural entity view attributes
    // If it were used multiple times, the second collection would not receive all expected elements, because both are based on the same join
    // and the first collection will already cause a "fold" of the results for materializing the collection in the entity view
    // We could theoretically try to defer the "fold" action, but the current model makes this pretty hard. The obvious workaround is to map a plural subview attribute
    // and put all mappings into that. This will guarantee that the "fold" action only happens after all properties have been processed
    Map<String, List<String>> collectionMappings = new HashMap<>();
    Map<String, List<String>> collectionMappingSingulars = new HashMap<>();
    for (AbstractMethodAttribute<? super X, ?> attribute : attributes.values()) {
        attribute.checkAttribute(jpaManagedType, context);
        for (Map.Entry<String, Boolean> entry : attribute.getCollectionJoinMappings(jpaManagedType, context).entrySet()) {
            if (entry.getValue()) {
                List<String> locations = collectionMappingSingulars.get(entry.getKey());
                if (locations == null) {
                    locations = new ArrayList<>(2);
                    collectionMappingSingulars.put(entry.getKey(), locations);
                }
                locations.add("Attribute '" + attribute.getName() + "' in entity view '" + javaType.getName() + "'");
            } else {
                List<String> locations = collectionMappings.get(entry.getKey());
                if (locations == null) {
                    locations = new ArrayList<>(2);
                    collectionMappings.put(entry.getKey(), locations);
                }
                locations.add("Attribute '" + attribute.getName() + "' in entity view '" + javaType.getName() + "'");
            }
        }
    }
    if (!constructorIndex.isEmpty()) {
        for (MappingConstructorImpl<X> constructor : constructorIndex.values()) {
            Map<String, List<String>> constructorCollectionMappings = new HashMap<>();
            for (Map.Entry<String, List<String>> entry : collectionMappings.entrySet()) {
                constructorCollectionMappings.put(entry.getKey(), new ArrayList<>(entry.getValue()));
            }
            constructor.checkParameters(jpaManagedType, constructorCollectionMappings, collectionMappingSingulars, context);
            reportCollectionMappingErrors(context, collectionMappings, collectionMappingSingulars);
        }
    } else {
        reportCollectionMappingErrors(context, collectionMappings, collectionMappingSingulars);
    }
    for (ViewRoot viewRoot : viewRoots) {
        if (viewRoot.getType() != null) {
            String location = "entity view root with the name '" + viewRoot.getName() + "' on type '" + javaType.getName() + "'";
            ScalarTargetResolvingExpressionVisitor visitor = new ScalarTargetResolvingExpressionVisitor((ManagedType<?>) viewRoot.getType(), context.getEntityMetamodel(), context.getJpqlFunctions(), viewRootTypes);
            String[] fetches = viewRoot.getFetches();
            if (fetches.length != 0) {
                if (!(viewRoot.getType() instanceof ManagedType<?>)) {
                    context.addError("Specifying fetches for non-entity attribute type [" + Arrays.toString(fetches) + "] at the " + location + " 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 " + location + ". 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 " + location + ": " + ex.getMessage());
                            }
                        } catch (IllegalArgumentException ex) {
                            context.addError("An error occurred while trying to resolve the " + errorLocation + " '" + fetch + "' of the " + location + ": " + ex.getMessage());
                        }
                    }
                }
            }
            String limitExpression = viewRoot.getLimitExpression();
            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 " + location + ": 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 " + location + ": " + ex.getMessage());
                } catch (IllegalArgumentException ex) {
                    context.addError("An error occurred while trying to resolve the limit expression '" + limitExpression + "' of the " + location + ": " + ex.getMessage());
                }
                String offsetExpression = viewRoot.getOffsetExpression();
                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 " + location + ": 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 " + location + ": " + ex.getMessage());
                } catch (IllegalArgumentException ex) {
                    context.addError("An error occurred while trying to resolve the offset expression '" + offsetExpression + "' of the " + location + ": " + ex.getMessage());
                }
                List<OrderByItem> orderByItems = viewRoot.getOrderByItems();
                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 " + location + ": " + ex.getMessage());
                    } catch (IllegalArgumentException ex) {
                        context.addError("An error occurred while trying to resolve the " + (i + 1) + "th order by expression '" + expression + "' of the " + location + ": " + ex.getMessage());
                    }
                }
            }
            CorrelationProviderFactory correlationProviderFactory = viewRoot.getCorrelationProviderFactory();
            Predicate correlationPredicate = null;
            if (correlationProviderFactory instanceof StaticCorrelationProvider) {
                correlationPredicate = ((StaticCorrelationProvider) correlationProviderFactory).getCorrelationPredicate();
            } else if (correlationProviderFactory instanceof StaticPathCorrelationProvider) {
                correlationPredicate = ((StaticPathCorrelationProvider) correlationProviderFactory).getCorrelationPredicate();
                String correlationPath = ((StaticPathCorrelationProvider) correlationProviderFactory).getCorrelationPath();
                try {
                    ScalarTargetResolvingExpressionVisitor correlationPathVisitor = new ScalarTargetResolvingExpressionVisitor(getJpaManagedType(), context.getEntityMetamodel(), context.getJpqlFunctions(), viewRootTypes);
                    context.getTypeValidationExpressionFactory().createSimpleExpression(correlationPath, false, false, true).accept(correlationPathVisitor);
                } catch (SyntaxErrorException ex) {
                    context.addError("Syntax error in the expression '" + correlationPath + "' of the " + location + ": " + ex.getMessage());
                } catch (IllegalArgumentException ex) {
                    context.addError("An error occurred while trying to resolve the expression '" + correlationPath + "' of the " + location + ": " + ex.getMessage());
                }
            }
            if (correlationPredicate != null) {
                try {
                    visitor.clear();
                    correlationPredicate.accept(visitor);
                } catch (SyntaxErrorException ex) {
                    context.addError("Syntax error in the condition expression '" + correlationPredicate + "' of the " + location + ": " + ex.getMessage());
                } catch (IllegalArgumentException ex) {
                    context.addError("An error occurred while trying to resolve the condition expression '" + correlationPredicate + "' of the " + location + ": " + ex.getMessage());
                }
            }
        }
    }
}

Example 2 with ViewRoot

use of com.blazebit.persistence.view.metamodel.ViewRoot in project blaze-persistence by Blazebit.

the class ManagedViewTypeImpl method renderSecondaryMappings.

@Override
public void renderSecondaryMappings(String viewPath, BaseQueryBuilder<?, ?> baseQueryBuilder, Map<String, Object> optionalParameters, boolean renderFetches) {
    if (baseQueryBuilder instanceof CTEBuilder) {
        CTEBuilder<?> cteBuilder = (CTEBuilder<?>) baseQueryBuilder;
        for (CTEProvider cteProvider : getCteProviders()) {
            cteProvider.applyCtes(cteBuilder, optionalParameters);
        }
    }
    for (ViewRoot viewRoot : viewRoots) {
        String entityViewRootName = viewRoot.getName();
        CorrelationProvider correlationProvider = viewRoot.getCorrelationProviderFactory().create(baseQueryBuilder, optionalParameters);
        ExpressionFactory expressionFactory = baseQueryBuilder.getService(ExpressionFactory.class);
        Limiter limiter = createLimiter(expressionFactory, viewPath, viewRoot.getLimitExpression(), viewRoot.getOffsetExpression(), viewRoot.getOrderByItems());
        String correlationAlias;
        if (limiter == null) {
            correlationAlias = entityViewRootName;
        } else {
            correlationAlias = "_sub_" + entityViewRootName;
        }
        JoinCorrelationBuilder correlationBuilder = new JoinCorrelationBuilder(baseQueryBuilder, optionalParameters, baseQueryBuilder, viewPath, correlationAlias, entityViewRootName, null, viewRoot.getJoinType(), limiter);
        correlationProvider.applyCorrelation(correlationBuilder, viewPath);
        correlationBuilder.finish();
        if (renderFetches && baseQueryBuilder instanceof FetchBuilder<?>) {
            ((FetchBuilder<?>) baseQueryBuilder).fetch(viewRoot.getFetches());
        }
    }
}