Examples of org.apache.cayenne.query.RelationshipQuery

org.apache.cayenne.query.RelationshipQuery
A query that selects objects related to a given object via a mapped relationship. RelationshipQuery is used by Cayenne internally to resolve relationships, and is rarely executed by the application directly, although this of course is possible too. @since 1.2 @author Andrus Adamchik


            return target;
        }


        Object doResolveFault(Persistent sourceObject, String relationshipName) {
            RelationshipQuery query = new RelationshipQuery(
                    sourceObject.getObjectId(),
                    relationshipName,
                    false);


            List objects = sourceObject.getObjectContext().performQuery(query);

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                    if (isTransientSource()) {
                        localList = new LinkedList();
                    }
                    else {
                        localList = source.getObjectContext().performQuery(
                                new RelationshipQuery(
                                        source.getObjectId(),
                                        relationship,
                                        false));
                    }

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        if (isTransientParent()) {
            return new ArrayList();
        }


        List resolved = relationshipOwner.getObjectContext().performQuery(
                new RelationshipQuery(
                        relationshipOwner.getObjectId(),
                        relationshipName,
                        false));


        if (resolved.isEmpty()) {

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    private boolean interceptRelationshipQuery() {


        if (query instanceof RelationshipQuery) {


            RelationshipQuery relationshipQuery = (RelationshipQuery) query;
            if (relationshipQuery.isRefreshing()) {
                return !DONE;
            }


            ObjRelationship relationship = relationshipQuery.getRelationship(domain
                    .getEntityResolver());


            // check if we can derive target PK from FK... this implies that the
            // relationship is to-one
            if (relationship.isSourceIndependentFromTargetChange()) {
                return !DONE;
            }


            if(cache == null) {
                return !DONE;
            }
            
            DataRow sourceRow = cache.getCachedSnapshot(relationshipQuery.getObjectId());
            if (sourceRow == null) {
                return !DONE;
            }


            // we can assume that there is one and only one DbRelationship as

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        return target;
    }


    Object doResolveFault(Persistent sourceObject, String relationshipName) {
        RelationshipQuery query = new RelationshipQuery(
                sourceObject.getObjectId(),
                relationshipName,
                false);


        List objects = sourceObject.getObjectContext().performQuery(query);

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    }


    protected boolean interceptRelationshipQuery() {


        if (query instanceof RelationshipQuery) {
            RelationshipQuery relationshipQuery = (RelationshipQuery) query;
            if (!relationshipQuery.isRefreshing()) {


                // don't intercept to-many relationships if fetch is done to the same
                // context as the root context of this action - this will result in an
                // infinite loop.


                if (targetContext == null
                        && relationshipQuery.getRelationship(
                                actingContext.getEntityResolver()).isToMany()) {
                    return !DONE;
                }


                ObjectId id = relationshipQuery.getObjectId();
                Object object = actingContext.getGraphManager().getNode(id);


                if (object != null) {


                    ClassDescriptor descriptor = actingContext
                            .getEntityResolver()
                            .getClassDescriptor(id.getEntityName());


                    if (!descriptor.isFault(object)) {


                        ArcProperty property = (ArcProperty) descriptor
                                .getProperty(relationshipQuery.getRelationshipName());


                        if (!property.isFault(object)) {


                            Object related = property.readPropertyDirectly(object);

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    }


    protected boolean interceptRelationshipQuery() {


        if (query instanceof RelationshipQuery) {
            RelationshipQuery relationshipQuery = (RelationshipQuery) query;
            if (!relationshipQuery.isRefreshing()) {


                // don't intercept to-many relationships if fetch is done to the same
                // context as the root context of this action - this will result in an
                // infinite loop.


                if (targetContext == null
                        && relationshipQuery.getRelationship(
                                actingContext.getEntityResolver()).isToMany()) {
                    return !DONE;
                }


                ObjectId id = relationshipQuery.getObjectId();
                Object object = actingContext.getGraphManager().getNode(id);


                if (object != null) {


                    ClassDescriptor descriptor = actingContext
                            .getEntityResolver()
                            .getClassDescriptor(id.getEntityName());


                    if (!descriptor.isFault(object)) {


                        ArcProperty property = (ArcProperty) descriptor
                                .getProperty(relationshipQuery.getRelationshipName());


                        if (!property.isFault(object)) {


                            Object related = property.readPropertyDirectly(object);

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        if (isTransientParent()) {
            return new ArrayList();
        }


        List resolved = relationshipOwner.getObjectContext().performQuery(
                new RelationshipQuery(
                        relationshipOwner.getObjectId(),
                        relationshipName,
                        false));


        if (resolved.isEmpty()) {

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        if (isTransientParent()) {
            return new ArrayList();
        }


        List resolved = relationshipOwner.getObjectContext().performQuery(
                new RelationshipQuery(relationshipOwner.getObjectId(), relationshipName, false));


        /**
         * Duplicating the list (see CAY-1194). Doing that only for
         * RelationshipFault query results, so only for nested DataContexts
         */

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    private boolean interceptRelationshipQuery() {


        if (query instanceof RelationshipQuery) {


            RelationshipQuery relationshipQuery = (RelationshipQuery) query;
            if (relationshipQuery.isRefreshing()) {
                return !DONE;
            }


            ObjRelationship relationship = relationshipQuery.getRelationship(domain.getEntityResolver());


            // check if we can derive target PK from FK...
            if (relationship.isSourceIndependentFromTargetChange()) {
                return !DONE;
            }


            // we can assume that there is one and only one DbRelationship as
            // we previously checked that "!isSourceIndependentFromTargetChange"
            DbRelationship dbRelationship = relationship.getDbRelationships().get(0);


            // FK pointing to a unique field that is a 'fake' PK (CAY-1755)...
            // It is not sufficient to generate target ObjectId.
            DbEntity targetEntity = (DbEntity) dbRelationship.getTargetEntity();
            if (dbRelationship.getJoins().size() < targetEntity.getPrimaryKeys().size()) {
                return !DONE;
            }


            if (cache == null) {
                return !DONE;
            }


            DataRow sourceRow = cache.getCachedSnapshot(relationshipQuery.getObjectId());
            if (sourceRow == null) {
                return !DONE;
            }


            ObjectId targetId = sourceRow.createTargetObjectId(relationship.getTargetEntityName(), dbRelationship);

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