/*
* Copyright 2003-2015 JetBrains s.r.o.
*
* Licensed 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 jetbrains.mps.smodel.event;
import jetbrains.mps.extapi.model.SNodeBatchChangeListener;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.openapi.event.AbstractModelChangeEvent;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
/**
* Mechanism to track {@link jetbrains.mps.extapi.model.SNodeBatchChangeListener} and dispatch events to them
* @author Artem Tikhomirov
*/
public class BatchChangeEventDispatch {
private final List<SNodeBatchChangeListener> myListeners = new CopyOnWriteArrayList<SNodeBatchChangeListener>();
public void add(@Nullable SNodeBatchChangeListener l) {
if (l != null) {
myListeners.add(l);
}
}
public void remove(@Nullable SNodeBatchChangeListener l) {
if (l != null) {
myListeners.remove(l);
}
}
public void dispatch(@Nullable Collection<AbstractModelChangeEvent> events) {
if (events == null || events.isEmpty()) {
return;
}
for (SNodeBatchChangeListener l : myListeners) {
l.processEvents(events);
}
}
}