Examples of org.jboss.dna.graph.query.model.SameNodeJoinCondition

org.jboss.dna.graph.query.model.SameNodeJoinCondition
A join condition that tests whether two nodes are the same nodes (that is, have the same identifier or have the same relative path from the nearest ancestor with an identifiers).

                return selectPath(source, childSelectorName);
            }
            String parentSelectorName = joinCondition.getParentSelectorName().getName();
            return selectPath(source, parentSelectorName);
        } else if (condition instanceof SameNodeJoinCondition) {
            SameNodeJoinCondition joinCondition = (SameNodeJoinCondition)condition;
            String selector1Name = joinCondition.getSelector1Name().getName();
            if (source.getColumns().hasSelector(selector1Name)) {
                return selectPath(source, selector1Name);
            }
            String selector2Name = joinCondition.getSelector2Name().getName();
            return selectPath(source, selector2Name);
        } else if (condition instanceof DescendantNodeJoinCondition) {
            DescendantNodeJoinCondition joinCondition = (DescendantNodeJoinCondition)condition;
            String ancestorSelectorName = joinCondition.getAncestorSelectorName().getName();
            if (source.getColumns().hasSelector(ancestorSelectorName)) {
                return selectPath(source, ancestorSelectorName);
            }
            String descendantSelectorName = joinCondition.getDescendantSelectorName().getName();
            return selectPath(source, descendantSelectorName);
        } else if (condition instanceof EquiJoinCondition) {
            EquiJoinCondition joinCondition = (EquiJoinCondition)condition;
            SelectorName selector1Name = joinCondition.getSelector1Name();
            String propName1 = joinCondition.getProperty1Name();
            if (source.getColumns().hasSelector(selector1Name.getName())) {
                return selectValue(source, selector1Name, propName1);
            }
            SelectorName selector2Name = joinCondition.getSelector2Name();
            String propName2 = joinCondition.getProperty2Name();
            return selectValue(source, selector2Name, propName2);
        }
        throw new IllegalArgumentException();
    }

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                    if (rewrittenSelectors == null) rewrittenSelectors = new HashMap<SelectorName, SelectorName>();
                    rewriteJoinNode(context, joinNode, rewrittenSelectors);
                    ++rewrittenJoins;
                }
            } else if (condition instanceof SameNodeJoinCondition) {
                SameNodeJoinCondition sameNodeCondition = (SameNodeJoinCondition)condition;
                if (sameNodeCondition.getSelector1Name().equals(sameNodeCondition.getSelector2Name())
                    && sameNodeCondition.getSelector2Path() == null) {
                    // It meets all the criteria, so rewrite this join node ...
                    if (rewrittenSelectors == null) rewrittenSelectors = new HashMap<SelectorName, SelectorName>();
                    rewriteJoinNode(context, joinNode, rewrittenSelectors);
                    ++rewrittenJoins;
                }

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                JoinType joinType = node.getProperty(Property.JOIN_TYPE, JoinType.class);
                JoinCondition joinCondition = node.getProperty(Property.JOIN_CONDITION, JoinCondition.class);
                switch (algorithm) {
                    case MERGE:
                        if (joinCondition instanceof SameNodeJoinCondition) {
                            SameNodeJoinCondition condition = (SameNodeJoinCondition)joinCondition;
                            component = new MergeJoinComponent(context, left, right, condition, joinType);
                        } else if (joinCondition instanceof ChildNodeJoinCondition) {
                            ChildNodeJoinCondition condition = (ChildNodeJoinCondition)joinCondition;
                            component = new MergeJoinComponent(context, left, right, condition, joinType);
                        } else if (joinCondition instanceof EquiJoinCondition) {

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            SelectorName replacement2 = rewrittenSelectors.get(condition.getSelector2Name());
            if (replacement1 == condition.getSelector1Name() && replacement2 == condition.getSelector2Name()) return condition;
            return new EquiJoinCondition(replacement1, condition.getProperty1Name(), replacement2, condition.getProperty2Name());
        }
        if (joinCondition instanceof SameNodeJoinCondition) {
            SameNodeJoinCondition condition = (SameNodeJoinCondition)joinCondition;
            SelectorName replacement1 = rewrittenSelectors.get(condition.getSelector1Name());
            SelectorName replacement2 = rewrittenSelectors.get(condition.getSelector2Name());
            if (replacement1 == condition.getSelector1Name() && replacement2 == condition.getSelector2Name()) return condition;
            return new SameNodeJoinCondition(replacement1, replacement2, condition.getSelector2Path());
        }
        if (joinCondition instanceof ChildNodeJoinCondition) {
            ChildNodeJoinCondition condition = (ChildNodeJoinCondition)joinCondition;
            SelectorName childSelector = rewrittenSelectors.get(condition.getChildSelectorName());
            SelectorName parentSelector = rewrittenSelectors.get(condition.getParentSelectorName());
            if (childSelector == condition.getChildSelectorName() && parentSelector == condition.getParentSelectorName()) return condition;
            return new ChildNodeJoinCondition(parentSelector, childSelector);
        }
        if (joinCondition instanceof DescendantNodeJoinCondition) {
            DescendantNodeJoinCondition condition = (DescendantNodeJoinCondition)joinCondition;
            SelectorName ancestor = rewrittenSelectors.get(condition.getAncestorSelectorName());
            SelectorName descendant = rewrittenSelectors.get(condition.getDescendantSelectorName());
            if (ancestor == condition.getAncestorSelectorName() && descendant == condition.getDescendantSelectorName()) return condition;
            return new ChildNodeJoinCondition(ancestor, descendant);
        }
        return joinCondition;
    }

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        // There is only a single source ...
        SelectorName viewName = mapping.getOriginalName();
        SelectorName sourceName = mapping.getSingleMappedSelectorName();


        if (joinCondition instanceof SameNodeJoinCondition) {
            SameNodeJoinCondition condition = (SameNodeJoinCondition)joinCondition;
            SelectorName replacement1 = condition.getSelector1Name();
            SelectorName replacement2 = condition.getSelector2Name();
            if (replacement1.equals(viewName)) replacement1 = sourceName;
            if (replacement2.equals(viewName)) replacement2 = sourceName;
            if (replacement1 == condition.getSelector1Name() && replacement2 == condition.getSelector2Name()) return condition;
            node.addSelector(replacement1, replacement2);
            if (condition.getSelector2Path() == null) return new SameNodeJoinCondition(replacement1, replacement2);
            return new SameNodeJoinCondition(replacement1, replacement2, condition.getSelector2Path());
        }
        if (joinCondition instanceof ChildNodeJoinCondition) {
            ChildNodeJoinCondition condition = (ChildNodeJoinCondition)joinCondition;
            SelectorName childSelector = condition.getChildSelectorName();
            SelectorName parentSelector = condition.getParentSelectorName();
            if (childSelector.equals(viewName)) childSelector = sourceName;
            if (parentSelector.equals(viewName)) parentSelector = sourceName;
            if (childSelector == condition.getChildSelectorName() && parentSelector == condition.getParentSelectorName()) return condition;
            node.addSelector(childSelector, parentSelector);
            return new ChildNodeJoinCondition(parentSelector, childSelector);
        }
        if (joinCondition instanceof DescendantNodeJoinCondition) {
            DescendantNodeJoinCondition condition = (DescendantNodeJoinCondition)joinCondition;
            SelectorName ancestor = condition.getAncestorSelectorName();
            SelectorName descendant = condition.getDescendantSelectorName();
            if (ancestor.equals(viewName)) ancestor = sourceName;
            if (descendant.equals(viewName)) descendant = sourceName;
            if (ancestor == condition.getAncestorSelectorName() && descendant == condition.getDescendantSelectorName()) return condition;
            node.addSelector(ancestor, descendant);
            return new ChildNodeJoinCondition(ancestor, descendant);
        }
        return joinCondition;
    }

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         * @param table2 the name or alias of the second table
         * @return the query builder instance, for method chaining purposes
         */
        public QueryBuilder onSameNode( String table1,
                                        String table2 ) {
            return createJoin(new SameNodeJoinCondition(nameOf(table1), nameOf(table2)));
        }

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            tokens.consume(',');
            SelectorName selector2Name = parseSelectorName(tokens);
            if (tokens.canConsume('.')) {
                String path = parsePath(tokens, typeSystem);
                tokens.consume(')');
                return new SameNodeJoinCondition(selector1Name, selector2Name, path);
            }
            tokens.consume(')');
            return new SameNodeJoinCondition(selector1Name, selector2Name);
        }
        if (tokens.canConsume("ISCHILDNODE", "(")) {
            SelectorName child = parseSelectorName(tokens);
            tokens.consume(',');
            SelectorName parent = parseSelectorName(tokens);

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                                                   Set<SelectorName> leftSelectors,
                                                   List<Object> leftSortBy,
                                                   Set<SelectorName> rightSelectors,
                                                   List<Object> rightSortBy ) {
        if (condition instanceof SameNodeJoinCondition) {
            SameNodeJoinCondition joinCondition = (SameNodeJoinCondition)condition;
            SelectorName name1 = joinCondition.getSelector1Name();
            SelectorName name2 = joinCondition.getSelector2Name();
            if (leftSelectors.contains(name1)) {
                leftSortBy.add(name1);
                rightSortBy.add(name2);
            } else {
                leftSortBy.add(name2);
                rightSortBy.add(name1);
            }
        } else if (condition instanceof ChildNodeJoinCondition) {
            ChildNodeJoinCondition joinCondition = (ChildNodeJoinCondition)condition;
            SelectorName childName = joinCondition.getChildSelectorName();
            SelectorName parentName = joinCondition.getParentSelectorName();
            if (leftSelectors.contains(childName)) {
                leftSortBy.add(childName);
                rightSortBy.add(parentName);
            } else {
                leftSortBy.add(parentName);
                rightSortBy.add(childName);
            }
        } else if (condition instanceof EquiJoinCondition) {
            EquiJoinCondition joinCondition = (EquiJoinCondition)condition;
            SelectorName selector1 = joinCondition.getSelector1Name();
            SelectorName selector2 = joinCondition.getSelector2Name();
            String property1 = joinCondition.getProperty1Name();
            String property2 = joinCondition.getProperty2Name();


            // Create the Ordering for the first selector/property pair ...
            DynamicOperand operand1 = new PropertyValue(selector1, property1);
            Ordering ordering1 = new Ordering(operand1, Order.ASCENDING);
            // Create the Ordering for the second selector/property pair ...

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Related Classes of org.jboss.dna.graph.query.model.SameNodeJoinCondition

org.jboss.dna.graph.query.optimize.ChooseJoinAlgorithm

org.jboss.dna.graph.query.optimize.RewriteIdentityJoins

org.jboss.dna.graph.query.parse.SqlQueryParser

org.jboss.dna.graph.query.plan.PlanUtil

org.jboss.dna.graph.query.process.JoinComponent

org.jboss.dna.graph.query.process.QueryProcessor

org.jboss.dna.graph.query.QueryBuilder$JoinClause

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