abstractdialogfilter.java

myjxta是用jxta开发的一个p2p通讯软件 有聊天 文件共享 视频3大功能 界面采用swing

/*
*  Copyright (c) 2001 Sun Microsystems, Inc.  All rights
*  reserved.
*
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions
*  are met:
*
*  1. Redistributions of source code must retain the above copyright
*  notice, this list of conditions and the following disclaimer.
*
*  2. Redistributions in binary form must reproduce the above copyright
*  notice, this list of conditions and the following discalimer in
*  the documentation and/or other materials provided with the
*  distribution.
*
*  3. The end-user documentation included with the redistribution,
*  if any, must include the following acknowledgment:
*  "This product includes software developed by the
*  Sun Microsystems, Inc. for Project JXTA."
*  Alternately, this acknowledgment may appear in the software itself,
*  if and wherever such third-party acknowledgments normally appear.
*
*  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
*  must not be used to endorse or promote products derived from this
*  software without prior written permission. For written
*  permission, please contact Project JXTA at http://www.jxta.org.
*
*  5. Products derived from this software may not be called "JXTA",
*  nor may "JXTA" appear in their name, without prior written
*  permission of Sun.
*
*  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
*  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
*  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
*  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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*  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
*  SUCH DAMAGE.
*  ====================================================================
*
*  This software consists of voluntary contributions made by many
*  individuals on behalf of Project JXTA.  For more
*  information on Project JXTA, please see
*  <http://www.jxta.org/>.
*
*  This license is based on the BSD license adopted by the Apache Foundation.
*
*  $Id: AbstractDialogFilter.java,v 1.1 2004/12/19 23:53:51 gonzo Exp $
*/

package net.jxta.myjxta.dialog.filter;

import net.jxta.myjxta.dialog.DialogFilter;
import net.jxta.myjxta.dialog.DialogMessageWrapper;

/**
 * Provides the base methods of all <code>DialogFilter</code>s
 * 
 * @author mike mcangus [mcangus at jxta dot org]
 */
public abstract class AbstractDialogFilter
implements DialogFilter {
    
    private boolean valid = true;

    /**
     * Returns true if this <code>DialogFilter</code> can process messages and false otherwise.
     * 
     * @param msg wrapper containing the DialogMessage that is currently being processed.
     * @return true if this <code>DialogFilter</code> can process messages and false otherwise.
     */
    protected boolean processMessage(DialogMessageWrapper msg) {
        return (this.valid && msg.isValid());
    }

    /**
     * Set to true if this <code>DialogFilter</code> should process <code>DialogMessage</code>s and 
     * false otherwise.
     * 
     * @param valid If true, then this DialogFilter will process DialogMessages, otherwise this filter is not invoked on
     * messages.
     */
    public void setValid(boolean valid) {
        this.valid = valid;
    }

    /**
     * Returns true if this <code>DialogFilter</code> should process <code>DialogMessage</code>s,
     * and false otherwise.
     * 
     * @return true if this <code>DialogFilter</code> should process <code>DialogMessage</code>s,
     * and false otherwise.
     */
    public boolean isValid() {
        return this.valid;
    }

    /* (non-Javadoc)
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	public boolean equals(Object arg0) {
		return (arg0 != null) && (this.getClass().equals(arg0.getClass()));
	}

    /* (non-Javadoc)
	 * @see java.lang.Object#hashCode()
	 */
	public int hashCode() {
		return this.getClass().hashCode();
	}
}