/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
****************************************************************/
package org.apache.cayenne.access;
import org.apache.cayenne.CayenneRuntimeException;
import org.apache.cayenne.graph.CompoundDiff;
import org.apache.cayenne.graph.GraphChangeHandler;
import org.apache.cayenne.graph.GraphDiff;
import org.apache.cayenne.graph.NodeIdChangeOperation;
import org.apache.cayenne.map.EntityResolver;
/**
* Converts server-side commit GraphDiff to the client version, accumulating the result in
* an internal CompoundDiff.
*
* @since 1.2
* @author Andrus Adamchik
*/
// TODO: currently only supports id change operations. When we can handle all operations,
// this class can be used for pushing any type of synchronization diffs to the client...
class ServerToClientDiffConverter implements GraphChangeHandler {
EntityResolver resolver;
CompoundDiff clientDiff;
ServerToClientDiffConverter(EntityResolver resolver) {
this.resolver = resolver;
this.clientDiff = new CompoundDiff();
}
GraphDiff getClientDiff() {
return clientDiff;
}
/**
* Does nothing.
*/
public void graphCommitAborted() {
}
/**
* Does nothing.
*/
public void graphCommitStarted() {
}
/**
* Does nothing.
*/
public void graphCommitted() {
}
/**
* Does nothing.
*/
public void graphRolledback() {
}
public void nodeIdChanged(Object nodeId, Object newId) {
clientDiff.add(new NodeIdChangeOperation(nodeId, newId));
}
public void nodeCreated(Object nodeId) {
throw new CayenneRuntimeException("Unimplemented...");
}
public void nodeRemoved(Object nodeId) {
throw new CayenneRuntimeException("Unimplemented...");
}
public void nodePropertyChanged(
Object nodeId,
String property,
Object oldValue,
Object newValue) {
throw new CayenneRuntimeException("Unimplemented...");
}
public void arcCreated(Object nodeId, Object targetNodeId, Object arcId) {
throw new CayenneRuntimeException("Unimplemented...");
}
public void arcDeleted(Object nodeId, Object targetNodeId, Object arcId) {
throw new CayenneRuntimeException("Unimplemented...");
}
}