/*******************************************************************************
* Copyright (c) 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Zend Technologies
*******************************************************************************/
package org.eclipse.php.internal.server.core;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.*;
/**
* Server helper class.
*/
public class ServerHelper {
protected Map map;
// property change listeners
private transient List propertyListeners;
private Server server;
public ServerHelper(Server server) {
this.map = new HashMap();
this.server = server;
}
public void setAttribute(String attributeName, String value) {
String current = getAttribute(attributeName, (String) null);
if (current != null && current.equals(value))
return;
if (value == null)
map.remove(attributeName);
else
map.put(attributeName, value);
firePropertyChangeEvent(attributeName, current, value);
}
/**
* Add a property change listener to this server.
*
* @param listener
* java.beans.PropertyChangeListener
*/
public void addPropertyChangeListener(PropertyChangeListener listener) {
if (propertyListeners == null) {
propertyListeners = new ArrayList(2);
}
propertyListeners.add(listener);
}
/**
* Remove a property change listener from this server.
*
* @param listener
* java.beans.PropertyChangeListener
*/
public void removePropertyChangeListener(PropertyChangeListener listener) {
if (propertyListeners != null) {
propertyListeners.remove(listener);
}
}
/**
* Fire a property change event.
*
* @param propertyName
* a property name
* @param oldValue
* the old value
* @param newValue
* the new value
*/
public void firePropertyChangeEvent(String propertyName, Object oldValue,
Object newValue) {
if (propertyListeners == null)
return;
PropertyChangeEvent event = new PropertyChangeEvent(server,
propertyName, oldValue, newValue);
try {
Iterator iterator = propertyListeners.iterator();
while (iterator.hasNext()) {
try {
PropertyChangeListener listener = (PropertyChangeListener) iterator
.next();
listener.propertyChange(event);
} catch (Exception e) {
Logger
.logException("Error firing property change event", //$NON-NLS-1$
e);
}
}
} catch (Exception e) {
Logger.logException("Error in property event", e); //$NON-NLS-1$
}
}
public String getAttribute(String attributeName, String defaultValue) {
try {
Object obj = map.get(attributeName);
if (obj == null)
return defaultValue;
return (String) obj;
} catch (Exception e) {
// ignore
}
return defaultValue;
}
public void removeAttribute(String attributeName) {
map.remove(attributeName);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((server == null) ? 0 : server.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
ServerHelper other = (ServerHelper) obj;
if (server == null) {
if (other.server != null)
return false;
} else if (!server.equals(other.server))
return false;
return true;
}
}