/*
* Copyright 2007-2008 the original author or authors.
*
* 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 org.impalaframework.module.holder;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import org.impalaframework.module.ModuleDefinition;
import org.impalaframework.module.spi.ModuleStateChange;
import org.impalaframework.module.spi.ModuleStateChangeListener;
import org.impalaframework.module.spi.ModuleStateChangeNotifier;
import org.impalaframework.module.spi.ModuleStateHolder;
public class DefaultModuleStateChangeNotifier implements ModuleStateChangeNotifier {
private List<ModuleStateChangeListener> listeners = new LinkedList<ModuleStateChangeListener>();
public void notify(ModuleStateHolder moduleStateHolder, ModuleStateChange change) {
ModuleDefinition moduleDefinition = change.getModuleDefinition();
for (ModuleStateChangeListener moduleStateChangeListener : listeners) {
String moduleName = moduleStateChangeListener.getModuleName();
boolean notify = true;
if (moduleName != null) {
if (!moduleName.equals(moduleDefinition.getName())) {
notify = false;
}
}
if (notify) {
String transition = moduleStateChangeListener.getTransition();
if (transition != null) {
if (!transition.equals(change.getTransition())) {
notify = false;
}
}
}
if (notify) {
moduleStateChangeListener.moduleStateChanged(moduleStateHolder, change);
}
}
}
public void setListeners(List<ModuleStateChangeListener> listeners) {
this.listeners.clear();
this.listeners.addAll(listeners);
}
public void addListener(ModuleStateChangeListener listener) {
this.listeners.add(listener);
}
public boolean removeListener(ModuleStateChangeListener listener) {
return this.listeners.remove(listener);
}
List<ModuleStateChangeListener> getListeners() {
return Collections.unmodifiableList(listeners);
}
}