Examples with ArcProperty org.apache.cayenne.reflect.ArcProperty used on opensource projects

Example 21 with ArcProperty

use of org.apache.cayenne.reflect.ArcProperty in project cayenne by apache.

the class CayenneContextChildDiffLoader method arcCreated.

@Override
public void arcCreated(Object nodeId, Object targetNodeId, Object arcId) {
    final Persistent source = findObject(nodeId);
    final Persistent target = findObject(targetNodeId);
    // can result in NULL target here.
    if (target == null) {
        return;
    }
    ClassDescriptor descriptor = context.getEntityResolver().getClassDescriptor(((ObjectId) nodeId).getEntityName());
    ArcProperty property = (ArcProperty) descriptor.getProperty(arcId.toString());
    property.visit(new PropertyVisitor() {

        public boolean visitAttribute(AttributeProperty property) {
            return false;
        }

        public boolean visitToMany(ToManyProperty property) {
            property.addTargetDirectly(source, target);
            return false;
        }

        public boolean visitToOne(ToOneProperty property) {
            property.setTarget(source, target, false);
            return false;
        }
    });
    context.propertyChanged(source, (String) arcId, null, target);
}

Example 22 with ArcProperty

use of org.apache.cayenne.reflect.ArcProperty in project cayenne by apache.

the class CayenneContextGraphManager method remapTargets.

/**
 * Remaps keys in to-many map relationships that contain dirty objects with
 * potentially modified properties.
 */
private void remapTargets() {
    Iterator<Object> it = stateLog.dirtyIds().iterator();
    EntityResolver resolver = context.getEntityResolver();
    while (it.hasNext()) {
        ObjectId id = (ObjectId) it.next();
        ClassDescriptor descriptor = resolver.getClassDescriptor(id.getEntityName());
        Collection<ArcProperty> mapArcProperties = descriptor.getMapArcProperties();
        if (!mapArcProperties.isEmpty()) {
            Object object = getNode(id);
            for (ArcProperty arc : mapArcProperties) {
                ToManyMapProperty reverseArc = (ToManyMapProperty) arc.getComplimentaryReverseArc();
                Object source = arc.readPropertyDirectly(object);
                if (source != null && !reverseArc.isFault(source)) {
                    remapTarget(reverseArc, source, object);
                }
            }
        }
    }
}

Example 23 with ArcProperty

use of org.apache.cayenne.reflect.ArcProperty in project cayenne by apache.

the class CayenneContextMergeHandler method arcDeleted.

public void arcDeleted(Object nodeId, Object targetNodeId, Object arcId) {
    // null source or target likely means the object is not faulted yet... Faults
    // shouldn't get disturbed by adding/removing arcs
    Object source = context.internalGraphManager().getNode(nodeId);
    if (source == null) {
        // no need to disconnect non-existent object
        return;
    }
    // (see "TODO" in 'arcCreated')
    ArcProperty p = (ArcProperty) propertyForId(nodeId, arcId.toString());
    if (p.isFault(source)) {
        return;
    }
    Object target = context.internalGraphManager().getNode(targetNodeId);
    if (target == null) {
        target = context.createFault((ObjectId) targetNodeId);
    }
    if (p instanceof ToManyProperty) {
        ((ToManyProperty) p).removeTargetDirectly(source, target);
    } else {
        p.writePropertyDirectly(source, target, null);
    }
}