relayvalidator.java

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

/*
*  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 THE APACHE SOFTWARE FOUNDATION OR
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*  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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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.
*
*  $Id: RelayValidator.java,v 1.1 2006/06/08 04:31:11 gonzo Exp $
*/
package net.jxta.ext.config.validators;

import net.jxta.exception.ConfiguratorException;
import net.jxta.ext.config.BaseProperty;
import net.jxta.ext.config.Configurator;
import net.jxta.ext.config.Protocol;
import net.jxta.ext.config.Transport;
import net.jxta.ext.config.Validator;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * Validate the relay information.
 *
 * @author  james todd [gonzo at jxta dot org]
 **/

public class RelayValidator
    extends BaseProperty
    implements Validator {
   
    private static final String COLON = ":";
    private static URI ANY_ADDRESS = toURI(Protocol.SCHEMELESS_URI_DELIMITER + COLON);
    private static URI ANY_TCP_ADDRESS = toURI(Protocol.TCP_URI + COLON);
    private static URI ANY_HTTP_ADDRESS = toURI(Protocol.HTTP_URI + COLON);
    private static URI ANY_UDP_ADDRESS = toURI(Protocol.UDP_URI + COLON);

    /**
     * Validate:
     *
     * <ul>
     *   <li>required relay</li>
     * </ul>
     **/

    public List validate(Configurator configurator) {
        List l = new ArrayList();

        if (configurator.isRelayOutgoing()) {
            int trc = 0;
            int hrc = 0;
            
            for (Iterator r = configurator.getRelays().iterator(); r.hasNext(); ) {
                URI uri = (URI)r.next();
                String s = uri.getScheme();
                
                if (s != null) {
                    if (s.equalsIgnoreCase(ANY_TCP_ADDRESS.getScheme())) {
                        trc++;
                    } else if (s.equalsIgnoreCase(ANY_HTTP_ADDRESS.getScheme())) {
                        hrc++;
                    }
                }
            }
            
            if (configurator.getRelaysBootstrapAddress() == null) {
                if (transportsContainsScheme(configurator, Transport.Scheme.TCP) &&
                    transportsContainsScheme(configurator, Transport.Scheme.HTTP)) {
                    if (trc + hrc == 0) {
                        l.add(new IllegalStateException("unspecified relay: " +
                            "tcp[" + transportsContainsScheme(configurator, Transport.Scheme.TCP) +
                            "] http[" +
                            transportsContainsScheme(configurator, Transport.Scheme.HTTP) +
                            "] relays[" + configurator.getRelays().iterator().hasNext() +
                            "]"));
                    }
                } else if (transportsContainsScheme(configurator, Transport.Scheme.TCP) &&
                    trc == 0) {
                    l.add(new IllegalStateException("unspecified " +
                        ANY_TCP_ADDRESS.getScheme() + " relay"));
                } else if (transportsContainsScheme(configurator, Transport.Scheme.HTTP) &&
                    hrc == 0) {
                    l.add(new IllegalStateException("unspecified " +
                        ANY_HTTP_ADDRESS.getScheme() + " relay"));
                }
            }
        }
        
        return l;
    }
    
    private static URI toURI(String s) {
        URI u = null;

        try {
            u = new URI(s);
        } catch (URISyntaxException use) {
        }

        return u;
    }
    
    private boolean transportsContainsScheme(Configurator c, String s) {
        boolean contains = false;
        
        if (s != null) {
            for (Iterator i = c.getTransports().iterator();
                i.hasNext() && ! contains; ) {
                if (((Transport)i.next()).getScheme().equalsIgnoreCase(s)) {
                    contains = true;
                }
            }
        }
        
        return contains;
    }
}