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/*
* Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
*
* The Sun Project JXTA(TM) Software License
*
* 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 Sun Microsystems, Inc. for JXTA(TM) technology."
* 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.
*
* JXTA is a registered trademark of Sun Microsystems, Inc. in the United
* States and other countries.
*
* Please see the license information page at :
* for instructions on use of
* the license in source files.
*
* ====================================================================
*
* 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.impl.rendezvous;
import net.jxta.document.Attributable;
import net.jxta.document.Attribute;
import net.jxta.document.Document;
import net.jxta.document.Element;
import net.jxta.document.MimeMediaType;
import net.jxta.document.StructuredDocument;
import net.jxta.document.StructuredDocumentFactory;
import net.jxta.document.XMLDocument;
import net.jxta.document.XMLElement;
import net.jxta.impl.id.UUID.UUID;
import net.jxta.impl.id.UUID.UUIDFactory;
import net.jxta.logging.Logging;
import java.net.URI;
import java.util.Enumeration;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* This class defines the wire format of the Propagation header for messages.
*/
public class RendezVousPropagateMessage {
/**
* Logger
*/
private final static transient Logger LOG = Logger.getLogger(RendezVousPropagateMessage.class.getName());
public final static String MSG_NAME = "jxta:RendezVousPropagateMessage";
public static final String MsgIdTag = "MessageId";
public final static String DestSNameTag = "DestSName";
public final static String DestSParamTag = "DestSParam";
public final static String TTLTag = "TTL";
public final static String PathTag = "Path";
/**
* Description of the Field
*/
public final static String Name = "RendezVousPropagate";
private UUID msgId = null;
private String destSName = null;
private String destSParam = null;
private int TTL = Integer.MIN_VALUE;
private final Set visited = new LinkedHashSet();
/**
* Constructor for the RendezVousPropagateMessage object
*/
public RendezVousPropagateMessage() {}
/**
* Constructor for the RendezVousPropagateMessage object
*
* @param root The root element of the message.
*/
public RendezVousPropagateMessage(Element root) {
this();
if (!XMLElement.class.isInstance(root)) {
throw new IllegalArgumentException(getClass().getName() + " only supports XLMElement");
}
XMLElement doc = (XMLElement) root;
String doctype = doc.getName();
String typedoctype = "";
Attribute itsType = doc.getAttribute("type");
if (null != itsType) {
typedoctype = itsType.getValue();
}
if (!doctype.equals(MSG_NAME) && !MSG_NAME.equals(typedoctype)) {
throw new IllegalArgumentException(
"Could not construct : " + getClass().getName() + "from doc containing a " + doc.getName());
}
Enumeration elements = doc.getChildren();
while (elements.hasMoreElements()) {
XMLElement elem = (XMLElement) elements.nextElement();
if (!handleElement(elem)) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Unhandled Element: " + elem.toString());
}
}
}
// Sanity Check!!!
if (Integer.MIN_VALUE == getTTL()) {
throw new IllegalArgumentException("TTL value not specified");
}
if (null == destSName) {
throw new IllegalArgumentException("Destination service name uninitialized");
}
if (null == msgId) {
throw new IllegalArgumentException("Message id uninitialized");
}
}
/**
* Process the document
*
* @param raw the document
* @return true if successful
*/
protected boolean handleElement(Element raw) {
XMLElement elem = (XMLElement) raw;
if (elem.getName().equals(MsgIdTag)) {
try {
msgId = new UUID(elem.getTextValue().trim());
} catch (IllegalArgumentException iae) {
// old message id format
try {
msgId = UUIDFactory.newHashUUID(Long.parseLong(elem.getTextValue().trim()), 0);
} catch (NumberFormatException notanumber) {
msgId = UUIDFactory.newHashUUID(elem.getTextValue().trim().hashCode(), 0);
}
}
return true;
}
if (elem.getName().equals(DestSNameTag)) {
destSName = elem.getTextValue().trim();
return true;
}
if (elem.getName().equals(DestSParamTag)) {
destSParam = elem.getTextValue().trim();
return true;
}
if (elem.getName().equals(TTLTag)) {
TTL = Integer.parseInt(elem.getTextValue().trim());
return true;
}
if (elem.getName().equals(PathTag)) {
addVisited(URI.create(elem.getTextValue().trim()));
return true;
}
return false;
}
public UUID getMsgId() {
return msgId;
}
public void setMsgId(UUID id) {
msgId = id;
}
public String getDestSName() {
return destSName;
}
public void setDestSName(String sName) {
this.destSName = sName;
}
public String getDestSParam() {
return destSParam;
}
public void setDestSParam(String sParam) {
this.destSParam = sParam;
}
/**
* Gets the TTL attribute of the RendezVousPropagateMessage object
*
* @return The TTL value
*/
public int getTTL() {
return TTL;
}
/**
* Sets the TTL attribute of the RendezVousPropagateMessage object
*
* @param ttl The new TTL value
*/
public void setTTL(int ttl) {
TTL = ttl;
}
/**
* Adds a location to the Visited Set
*
* @param location which was visited.
*/
public void addVisited(URI location) {
visited.add(location);
}
/**
* Returns true if the specified location is in the visited Set.
*
* @param location The location to check
* @return true if specified location has been visited.
*/
public boolean isVisited(URI location) {
return visited.contains(location);
}
/**
* Returns the path which this message has travelled.
*
* @return the path this message travelled.
*/
public URI[] getPath() {
return visited.toArray(new URI[visited.size()]);
}
public Document getDocument(MimeMediaType encodeAs) {
// Sanity Check!!!
if (getTTL() <= 0) {
throw new IllegalStateException("TTL value < 1");
}
if (null == destSName) {
throw new IllegalStateException("Destination service name uninitialized");
}
if (null == msgId) {
throw new IllegalStateException("Message id uninitialized");
}
if (visited.isEmpty()) {
throw new IllegalStateException("Message has not visited local peer.");
}
StructuredDocument doc = StructuredDocumentFactory.newStructuredDocument(encodeAs, MSG_NAME);
if (doc instanceof XMLDocument) {
((Attributable) doc).addAttribute("xmlns:jxta", "http://jxta.org");
((Attributable) doc).addAttribute("xml:space", "preserve");
}
Element e = null;
e = doc.createElement(MsgIdTag, msgId.toString());
doc.appendChild(e);
e = doc.createElement(DestSNameTag, destSName);
doc.appendChild(e);
if (null != destSParam) {
e = doc.createElement(DestSParamTag, destSParam);
doc.appendChild(e);
}
e = doc.createElement(TTLTag, Integer.toString(TTL));
doc.appendChild(e);
for (Object aVisited : visited) {
e = doc.createElement(PathTag, aVisited.toString());
doc.appendChild(e);
}
return doc;
}
}
