resolverquery.java

jxme的一些相关程序,主要是手机上程序开发以及手机和计算机通信的一些程序资料,程序编译需要Ant支持

/*
 * 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 disclaimer 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 SUN MICROSYSTEMS OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * 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: ResolverQuery.java,v 1.2 2002/03/04 21:43:00 echtcherbina Exp $
 */
package net.jxta.impl.protocol;

import java.io.InputStream;
import java.io.StringWriter;
import java.util.Enumeration;

import java.io.IOException;

import org.apache.log4j.Category;
import org.apache.log4j.Priority;

import net.jxta.document.*;
import net.jxta.protocol.*;
import net.jxta.resolver.*;
import net.jxta.impl.document.*;

/**
 * ResolverQuery provides the binding for the message to query other node
 */
public class ResolverQuery extends ResolverQueryMsg  {

    /**
     * The Log4J debugging category.
     *
     * @since 1.0
     */
    private final static Category LOG = Category.getInstance(ResolverQuery.class.getName());
        
    private static final String handlernameTag = "HandlerName";
    private static final String  credentialTag = "Credential";
    private static final String     queryIdTag = "QueryID";
    private static final String   srcPeerIdTag = "SrcPeerID";
    private static final String       queryTag = "Query";

    /**
     * Construct a doc from InputStream
     *
     */
    public ResolverQuery( InputStream stream ) throws IOException {

            // We are asked to assume that the message from which this response
            // is constructed is an XML document.
            StructuredTextDocument doc = (StructuredTextDocument)
                StructuredDocumentFactory.newStructuredDocument(
                      new MimeMediaType( "text", "xml"), stream );
                readIt( doc );
    }

    /**
     * Construct from a StructuredDocument
     *
     */
    public ResolverQuery( TextElement doc ) {

        if( !getAdvertisementType().equals( doc.getName() ) ) {
            throw new IllegalArgumentException( "Could not construct : " +
            getClass().getName() + "from doc containing a " +
            doc.getName() );
        }
        readIt( doc );
    }


    public void readIt( TextElement doc ) {

        Enumeration elements = doc.getChildren();

        while (elements.hasMoreElements()) {

            TextElement elem = (TextElement) elements.nextElement();
            if( elem.getName().equals (handlernameTag)) {
                setHandlerName ( elem.getTextValue() );
                continue;
            }

            // Set credentialServiecUri
            if( elem.getName().equals(credentialTag)) {
                setCredential ( elem.getTextValue() );
                continue;
            }

            // Set queryid
            if( elem.getName().equals(queryIdTag)) {
                queryid=Integer.parseInt( elem.getTextValue() );
                continue;
            }

            // Set source peer
            if( elem.getName().equals(srcPeerIdTag)) {
                setSrc (elem.getTextValue());
                continue;
            }
            // Set query
            if( elem.getName().equals(queryTag) ) {
                setQuery ( elem.getTextValue() );
                continue;
            }
        }
    }

    /**
     * Construct a doc from strings
     *
     */
    public ResolverQuery(String HandlerName, String Credential, String pId,
                        String Query, int qid) {

        setHandlerName(HandlerName);
        setCredential(Credential);
        setQueryId(qid);
        setSrc(pId);
        setQuery(Query);
    }

    /**
     * return a Document represetation of this object
     * @param encodeAs
     * @return
     */
    public Document getDocument( MimeMediaType encodeAs ) throws Exception {

        StructuredTextDocument adv = (StructuredTextDocument)
            StructuredDocumentFactory.newStructuredDocument(
            encodeAs, 
            getAdvertisementType() );
        Element e;

        e = adv.createElement (handlernameTag, getHandlerName());
        adv.appendChild (e);
        e = adv.createElement (credentialTag, getCredential());
        adv.appendChild (e);
        e = adv.createElement (queryIdTag, Integer.toString(queryid));
        adv.appendChild (e);
        e = adv.createElement (srcPeerIdTag, getSrc());
        adv.appendChild (e);
        e = adv.createElement (queryTag, getQuery());
        adv.appendChild (e);
        return adv;
    }

    /**
     * retunrs the this doc as string
     * @return String representation of the of this
     * message type
     */

    public String toString() {

        try {
            StringWriter    out = new StringWriter();
            StructuredTextDocument doc =(StructuredTextDocument) 
               getDocument( new MimeMediaType("text/xml") );

            doc.sendToWriter( out );
            
            String result = out.toString();
            
            return result;
        }
        catch( Exception e ) {
            LOG.debug( "Could not generate ResolverQuery" );
            return "";
        }
    }
}