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

org.jboss.dna.graph.query.model.DescendantNodeJoinCondition
A join condition that evaluates to true only when the named node is a descendant of another named node.

                    Path parentPath = ((Location)parentLocation).getPath();
                    return childPath.getParent().isSameAs(parentPath);
                }
            };
        } else if (condition instanceof DescendantNodeJoinCondition) {
            DescendantNodeJoinCondition joinCondition = (DescendantNodeJoinCondition)condition;
            String ancestorSelectorName = joinCondition.getAncestorSelectorName().getName();
            if (left.getColumns().hasSelector(ancestorSelectorName)) {
                // The ancestor is on the left ...
                return new Joinable() {
                    public boolean evaluate( Object ancestorLocation,
                                             Object descendantLocation ) {

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            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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            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 descendantTable the name or alias of the table containing the descendant node
         * @return the query builder instance, for method chaining purposes
         */
        public QueryBuilder onDescendant( String ancestorTable,
                                          String descendantTable ) {
            return createJoin(new DescendantNodeJoinCondition(nameOf(ancestorTable), nameOf(descendantTable)));
        }

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        if (tokens.canConsume("ISDESCENDANTNODE", "(")) {
            SelectorName descendant = parseSelectorName(tokens);
            tokens.consume(',');
            SelectorName ancestor = parseSelectorName(tokens);
            tokens.consume(')');
            return new DescendantNodeJoinCondition(ancestor, descendant);
        }
        SelectorName selector1 = parseSelectorName(tokens);
        tokens.consume('.');
        String property1 = parseName(tokens, typeSystem);
        tokens.consume('=');

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

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.QueryBuilder$JoinClause

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