Examples of org.modeshape.jcr.query.model.PropertyExistence

org.modeshape.jcr.query.model.PropertyExistence
A constraint that evaluates to true only when a named property exists on a node.

        NamedSelector selector = (NamedSelector)query.source();
        assertThat(selector.name(), is(selectorName("car:Car")));
        assertThat(selector.aliasOrName(), is(selectorName("car:Car")));
        assertThat(selector.alias(), is(nullValue()));
        // WHERE ...
        PropertyExistence constraint = isPropertyExistence(query.constraint());
        assertThat(constraint.getPropertyName(), is("car:model"));
        assertThat(constraint.selectorName(), is(selectorName("car:Car")));
        // ORDER BY ...
        assertThat(query.orderings().size(), is(1));
        Ordering ordering = query.orderings().get(0);
        assertThat(ordering.order(), is(Order.ASCENDING));
        assertThat(ordering.getOperand(), is((DynamicOperand)propertyValue(selectorName("car:Car"), "car:model")));

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        NamedSelector selector = (NamedSelector)query.source();
        assertThat(selector.name(), is(selectorName("car:Car")));
        assertThat(selector.aliasOrName(), is(selectorName("car:Car")));
        assertThat(selector.alias(), is(nullValue()));
        // WHERE ...
        PropertyExistence constraint = isPropertyExistence(query.constraint());
        assertThat(constraint.getPropertyName(), is("car:model"));
        assertThat(constraint.selectorName(), is(selectorName("car:Car")));
        // ORDER BY ...
        assertThat(query.orderings().size(), is(1));
        Ordering ordering = query.orderings().get(0);
        assertThat(ordering.order(), is(Order.ASCENDING));
        assertThat(ordering.getOperand(), is((DynamicOperand)propertyValue(selectorName("car:Car"), "car:model")));

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                    return "(filter " + Visitors.readable(constraint) + ")";
                }
            };
        }
        if (constraint instanceof PropertyExistence) {
            PropertyExistence propertyExistance = (PropertyExistence)constraint;
            NameFactory names = context.getExecutionContext().getValueFactories().getNameFactory();
            final Name propertyName = names.create(propertyExistance.getPropertyName());
            final String selectorName = propertyExistance.selectorName().name();
            final int index = columns.getSelectorIndex(selectorName);
            final NodeCache cache = context.getNodeCache(sources.getWorkspaceName());
            assert index >= 0;
            return new RowFilter() {
                @Override

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            SelectorName replacement = rewrittenSelectors.get(descendantNode.selectorName());
            if (replacement == null) return descendantNode;
            return new DescendantNode(replacement, descendantNode.getAncestorPath());
        }
        if (constraint instanceof PropertyExistence) {
            PropertyExistence existence = (PropertyExistence)constraint;
            SelectorName replacement = rewrittenSelectors.get(existence.selectorName());
            if (replacement == null) return existence;
            return new PropertyExistence(replacement, existence.getPropertyName());
        }
        if (constraint instanceof FullTextSearch) {
            FullTextSearch search = (FullTextSearch)constraint;
            SelectorName replacement = rewrittenSelectors.get(search.selectorName());
            if (replacement == null) return search;

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            SelectorName selector = mapping.getSingleMappedSelectorName();
            node.addSelector(selector);
            return new DescendantNode(selector, descendantNode.getAncestorPath());
        }
        if (constraint instanceof PropertyExistence) {
            PropertyExistence existence = (PropertyExistence)constraint;
            if (!mapping.getOriginalName().equals(existence.selectorName())) return existence;
            Column sourceColumn = mapping.getMappedColumn(existence.getPropertyName());
            if (sourceColumn == null) return existence;
            node.addSelector(sourceColumn.selectorName());
            return new PropertyExistence(sourceColumn.selectorName(), sourceColumn.getPropertyName());
        }
        if (constraint instanceof FullTextSearch) {
            FullTextSearch search = (FullTextSearch)constraint;
            if (!mapping.getOriginalName().equals(search.selectorName())) return search;
            Column sourceColumn = mapping.getMappedColumn(search.getPropertyName());

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            DynamicOperand newOperand = rewrite(context, operand);
            if (newOperand != operand) {
                return new SetCriteria(newOperand, set.rightOperands());
            }
        } else if (constraint instanceof PropertyExistence) {
            PropertyExistence exist = (PropertyExistence)constraint;
            String property = exist.getPropertyName();
            if ("jcr:path".equals(property) || "jcr:name".equals(property) || "mode:localName".equals(property)
                || "jcr:localName".equals(property) || "mode:depth".equals(property) || "jcr:depth".equals(property)
                || "jcr:score".equals(property) || "mode:id".equals(property)) {
                // This constraint will always be true, so use this constraint that always is true ...
                return new PropertyExistence(exist.selectorName(), "jcr:primaryType");
            }
        }
        return constraint;
    }

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                }
                selectorName = ((Selector)source).name();
                propertyName = firstWord;
            }
            if (tokens.canConsume("IS", "NOT", "NULL")) {
                return new PropertyExistence(selectorName, propertyName);
            }
            tokens.consume("IS", "NULL");
            return new Not(new PropertyExistence(selectorName, propertyName));
        }
        return null;
    }

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        return new Ordering(operand, order, nullOrder);
    }


    protected PropertyExistence propertyExistence( SelectorName selector,
                                                   String propertyName ) {
        return new PropertyExistence(selector, propertyName);
    }

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         * @param propertyName the name of the property
         * @return the constraint builder that was used to create this clause; never null
         */
        public ConstraintBuilder hasProperty( String table,
                                              String propertyName ) {
            return setConstraint(new PropertyExistence(selector(table), propertyName));
        }

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    public void shouldParsePropertyExistanceFromPropertyNameWithSelectorNameAndPropertyNameFollowedByIsNotNull() {
        Constraint constraint = parser.parsePropertyExistance(tokens("tableA.property1 IS NOT NULL"),
                                                              typeSystem,
                                                              mock(Source.class));
        assertThat(constraint, is(instanceOf(PropertyExistence.class)));
        PropertyExistence p = (PropertyExistence)constraint;
        assertThat(p.getPropertyName(), is("property1"));
        assertThat(p.selectorName(), is(selectorName("tableA")));
    }

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