| /* |
| * 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.openjpa.util; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| /** |
| * A collection change tracker used by delay loaded collections. |
| * |
| */ |
| public class DelayedCollectionChangeTrackerImpl |
| extends CollectionChangeTrackerImpl { |
| |
| public DelayedCollectionChangeTrackerImpl(Collection coll, boolean dups, |
| boolean order,boolean autoOff) { |
| super(coll, dups, order, autoOff); |
| } |
| |
| @Override |
| protected void add(Object elem) { |
| if (rem == null || !rem.remove(elem)) { |
| if (add == null) { |
| if (_dups || _order) |
| add = new ArrayList(); |
| else |
| add = newSet(); |
| } |
| add.add(elem); |
| } else { |
| if (change == null) |
| change = newSet(); |
| change.add(elem); |
| } |
| } |
| |
| @Override |
| protected void remove(Object elem) { |
| if (add == null || !add.remove(elem)) { |
| if (rem == null) |
| rem = newSet(); |
| rem.add(elem); |
| } |
| } |
| |
| @Override |
| protected void change(Object elem) { |
| throw new InternalException(); |
| } |
| } |