Package org.jboss.dna.graph.query.QueryBuilder

Examples of org.jboss.dna.graph.query.QueryBuilder.ConstraintBuilder


                throw new InvalidQueryException(query, "An absolute path expression must start with '//' or '/jcr:root/...'");
            }
        }

        // Walk the steps along the path expression ...
        ConstraintBuilder where = builder.where();
        List<StepExpression> path = new ArrayList<StepExpression>();
        String tableName = null;
        for (StepExpression step : steps) {
            if (step instanceof AxisStep) {
                AxisStep axis = (AxisStep)step;
                NodeTest nodeTest = axis.getNodeTest();
                if (nodeTest instanceof NameTest) {
                    if (appliesToPathConstraint(axis.getPredicates())) {
                        // Everything in this axis/step applies to the path, so add it and we'll translate it below ...
                        path.add(step);
                    } else {
                        // The constraints are more complicated than can be applied to the path ...
                        // if (!nameTest.isWildcard()) {
                        // There is a non-wildcard name test that we still need to add to the path ...
                        path.add(step);
                        // }
                        // We need to define a new source/table ...
                        tableName = translateSource(tableName, path, where);
                        translatePredicates(axis.getPredicates(), tableName, where);
                        path.clear();
                    }
                } else if (nodeTest instanceof ElementTest) {
                    // We need to build a new source with the partial path we have so far ...
                    tableName = translateElementTest((ElementTest)nodeTest, path, where);
                    translatePredicates(axis.getPredicates(), tableName, where);
                    path.clear();
                } else if (nodeTest instanceof AttributeNameTest) {
                    AttributeNameTest attributeName = (AttributeNameTest)nodeTest;
                    builder.select(nameFrom(attributeName.getNameTest()));
                } else {
                    throw new InvalidQueryException(query, "The '" + step + "' step is not supported");
                }
            } else if (step instanceof FilterStep) {
                FilterStep filter = (FilterStep)step;
                Component primary = filter.getPrimaryExpression();
                List<Component> predicates = filter.getPredicates();
                if (primary instanceof ContextItem) {
                    if (appliesToPathConstraint(predicates)) {
                        // Can ignore the '.' ...
                    } else {
                        // The constraints are more complicated, so we need to define a new source/table ...
                        path.add(step);
                        tableName = translateSource(tableName, path, where);
                        translatePredicates(predicates, tableName, where);
                        path.clear();
                    }
                } else if (primary instanceof Literal) {
                    throw new InvalidQueryException(query,
                                                    "A literal is not supported in the primary path expression; therefore '"
                                                    + primary + "' is not valid");
                } else if (primary instanceof FunctionCall) {
                    throw new InvalidQueryException(query,
                                                    "A function call is not supported in the primary path expression; therefore '"
                                                    + primary + "' is not valid");
                } else if (primary instanceof ParenthesizedExpression) {
                    // This can be used to define an OR-ed set of expressions defining select columns ...
                    ParenthesizedExpression paren = (ParenthesizedExpression)primary;
                    Component wrapped = paren.getWrapped().collapse();
                    if (wrapped instanceof AttributeNameTest) {
                        AttributeNameTest attributeName = (AttributeNameTest)wrapped;
                        builder.select(nameFrom(attributeName.getNameTest()));
                    } else if (wrapped instanceof BinaryComponent) {
                        for (AttributeNameTest attributeName : extractAttributeNames((BinaryComponent)wrapped)) {
                            builder.select(nameFrom(attributeName.getNameTest()));
                        }
                        path.add(filter); // in case any element names are there
                    } else {
                        throw new InvalidQueryException(query,
                                                        "A parenthesized expression of this type is not supported in the primary path expression; therefore '"
                                                        + primary + "' is not valid");
                    }
                }

            } else {
                path.add(step);
            }
        }
        if (steps.isEmpty() || !path.isEmpty()) {
            translateSource(tableName, path, where);
        }
        where.end();

        // Process the order-by clause ...
        OrderBy orderBy = pathExpression.getOrderBy();
        if (orderBy != null) {
            OrderByBuilder orderByBuilder = builder.orderBy();
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