documentmodifiedevent.java

来自「JRemoteControl is a simple Java&#8482 dr」· Java 代码 · 共 65 行

/*
 * JRemCntl - Copyright (C) 2007 Filippo Di Vattimo <[e-mail]>
 * See COPYING
 */

package fildiv.jremcntl.server.gui.core;


public class DocumentModifiedEvent extends DocumentEvent {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	private Object whatModified;
	
	public DocumentModifiedEvent(Object source) {
		super(source);
		
		whatModified = null;
	}

	public DocumentModifiedEvent(Object source, Object whatModified) {
		super(source);
		
		this.whatModified = whatModified;
	}

	public Object getWhatModified() {
		return whatModified;
	}
	
	public boolean equals(Object obj) {
		
		DocumentModifiedEvent event = (DocumentModifiedEvent) obj;
		
		boolean equals = safeEquals(event.getWhatModified(), whatModified);
		equals &= source.equals(event.getSource());
		
		return equals;
	}
	
	private boolean safeEquals(Object obj1, Object obj2) {

		int nullCount = obj1 == null ? 1 : 0;
		nullCount += obj2 == null ? 1 : 0;
		
		if (nullCount == 0)
			return obj1.equals(obj2);
		
		return nullCount == 2;
	}

	public int hashCode() {
		int hashCode = source.hashCode();
		
		if (whatModified != null)
			hashCode += whatModified.hashCode();
		
		return hashCode;
	}
	
}