idformat.java

jxta_src_2.41b jxta 2.41b 最新版源码 from www.jxta.org

/************************************************************************
 *
 * $Id: IDFormat.java,v 1.6 2004/04/24 18:47:26 bondolo Exp $
 *
 * Copyright (c) 2001 Sun Microsystems, Inc.  All rights reserved.
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 * 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
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 * 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.
 *********************************************************************************/

package net.jxta.id.jxta;

import net.jxta.id.IDFactory;

/**
 * The 'jxta' ID Format is used for the presentation of a limited number of
 * well-known ids. These are the null id, the world peer group id, and the
 * default net peer group id. JXTA depends on being able to refer to these
 * standard entities in a common way regardless of what other id formats are
 * used, indeed this ID Format and these ids exist so that there are not a
 * different representations for the ids of these entities with each ID Format.
 *
 * <p/>Rather than return its own version of these well known IDs, each ID
 * Format <b>MUST</b> return these IDs as appropriate.
 *
 * <ul>
 * <li>the null id - the NullID is often used as a placeholder in fields which
 * are uninitialized.</li>
 *
 * <li>the world peer group id - the id of the world peer group.</li>
 *
 * <li>the default net peer group id - the id of the default net peer group.</li>
 * </ul>
 *
 * @see net.jxta.id.ID
 * @see net.jxta.id.IDFactory
    @see <a href="http://spec.jxta.org/nonav/v1.0/docbook/JXTAProtocols.html#ids" target='_blank'>JXTA Protocols Specification : IDs</a>
    @see <a href="http://spec.jxta.org/nonav/v1.0/docbook/JXTAProtocols.html#ids-jinf" target='_blank'>JXTA Protocols Specification : ?jxta? ID Format</a>
 *
 **/
public final class IDFormat {
    
    /**
     * The name associated with this ID Format.
     */    
    final static  String JXTAFormat = "jxta";
    
    /**
     * The instantiator for this ID Format which is used by the IDFactory.
     *
     * @since JXTA 1.0
     **/    
    public static final IDFactory.URIInstantiator INSTANTIATOR = new Instantiator();
    
    /**
     *  Private Constructor. This class cannot be instantiated.
     **/
    private IDFormat() {
    };
}