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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 com.motorolamobility.studio.android.certmanager.event;
import java.util.ArrayList;
import java.util.List;
import com.motorolamobility.studio.android.certmanager.ui.model.ITreeNode;
/**
* Manager which notifies {@link IKeyStoreModelListener} registered that a {@link KeyStoreModelEvent} occurred.
* It is a singleton that needs to be called by the hierarchy of {@link ITreeNode} items when they modify the {@link ITreeNode}.
*/
public class KeyStoreModelEventManager
{
private static KeyStoreModelEventManager _instance;
private final List<IKeyStoreModelListener> listeners = new ArrayList<IKeyStoreModelListener>();
private KeyStoreModelEventManager()
{
// Singleton - private default constructor prevents instantiations by other classes.
}
/**
* Return the singleton instance of KeyStoreModelEventManager.
* */
public synchronized static KeyStoreModelEventManager getInstance()
{
if (_instance == null)
{
_instance = new KeyStoreModelEventManager();
}
return _instance;
}
/**
* Add the parameter {@code listener} to the list of KeyStore event listeners.
* @param listener The listener to be added.
* */
public void addListener(IKeyStoreModelListener listener)
{
synchronized (listener)
{
listeners.add(listener);
}
}
/**
* Remove the parameter {@code listener} to the list of KeyStore event listeners.
* @param listener The listener to be removed.
* */
public void removeListener(IKeyStoreModelListener listener)
{
synchronized (listener)
{
listeners.remove(listener);
}
}
/**
* Fire/notify/deliver the event to registered listeners.
* @param node {@link ITreeNode} that needs to refresh the view based on the model
* @param eventType Event that occurred.
*/
public void fireEvent(ITreeNode treeNodeItem, KeyStoreModelEvent.EventType eventType)
{
KeyStoreModelEvent keyStoreModelEvent = new KeyStoreModelEvent(treeNodeItem, eventType);
synchronized (listeners)
{
if (listeners != null)
{
for (IKeyStoreModelListener listener : listeners)
{
switch (eventType)
{
case ADD:
listener.handleNodeAdditionEvent(keyStoreModelEvent);
break;
case REMOVE:
listener.handleNodeRemovalEvent(keyStoreModelEvent);
break;
case UPDATE:
listener.handleNodeUpdateEvent(keyStoreModelEvent);
break;
case COLLAPSE:
listener.handleNodeCollapseEvent(keyStoreModelEvent);
break;
case REFRESH:
listener.handleNodeRefreshEvent(keyStoreModelEvent);
break;
case CLEAR:
listener.handleNodeClearEvent(keyStoreModelEvent);
break;
default:
break;
}
}
}
}
}
}
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