2 * Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
4 * The Sun Project JXTA(TM) Software License
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
16 * 3. The end-user documentation included with the redistribution, if any, must
17 * include the following acknowledgment: "This product includes software
18 * developed by Sun Microsystems, Inc. for JXTA(TM) technology."
19 * Alternately, this acknowledgment may appear in the software itself, if
20 * and wherever such third-party acknowledgments normally appear.
22 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
23 * not be used to endorse or promote products derived from this software
24 * without prior written permission. For written permission, please contact
25 * Project JXTA at http://www.jxta.org.
27 * 5. Products derived from this software may not be called "JXTA", nor may
28 * "JXTA" appear in their name, without prior written permission of Sun.
30 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
32 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SUN
33 * MICROSYSTEMS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
36 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
37 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
38 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
39 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 * JXTA is a registered trademark of Sun Microsystems, Inc. in the United
42 * States and other countries.
44 * Please see the license information page at :
45 * <http://www.jxta.org/project/www/license.html> for instructions on use of
46 * the license in source files.
48 * ====================================================================
50 * This software consists of voluntary contributions made by many individuals
51 * on behalf of Project JXTA. For more information on Project JXTA, please see
52 * http://www.jxta.org.
54 * This license is based on the BSD license adopted by the Apache Foundation.
56 package net.jxta.impl.pipe;
58 import net.jxta.document.Attribute;
59 import net.jxta.document.Document;
60 import net.jxta.document.Element;
61 import net.jxta.document.MimeMediaType;
62 import net.jxta.document.StructuredDocumentFactory;
63 import net.jxta.document.StructuredTextDocument;
64 import net.jxta.document.XMLDocument;
65 import net.jxta.document.XMLElement;
66 import net.jxta.id.ID;
67 import net.jxta.id.IDFactory;
68 import net.jxta.logging.Logging;
71 import java.net.URISyntaxException;
72 import java.util.Enumeration;
73 import java.util.logging.Level;
74 import java.util.logging.Logger;
77 * This class implements a JXTA-WIRE header.
79 public class WireHeader {
84 private final static Logger LOG = Logger.getLogger(WireHeader.class.getName());
86 private static final String Name = "JxtaWire";
87 private static final String MsgIdTag = "MsgId";
88 private static final String PipeIdTag = "PipeId";
89 private static final String SrcTag = "SrcPeer";
90 private static final String TTLTag = "TTL";
91 private static final String PeerTag = "VisitedPeer";
93 private ID srcPeer = ID.nullID;
94 private ID pipeID = ID.nullID;
95 private String msgId = null;
96 private int TTL = Integer.MIN_VALUE;
98 public WireHeader() {}
100 public WireHeader(Element root) {
104 public void setSrcPeer(ID p) {
108 public ID getSrcPeer() {
112 public void setTTL(int t) {
116 public int getTTL() {
120 public String getMsgId() {
124 public void setMsgId(String id) {
128 public ID getPipeID() {
132 public void setPipeID(ID id) {
137 * Called to handle elements during parsing.
139 * @param elem Element to parse
140 * @return true if element was handled, otherwise false.
142 protected boolean handleElement(XMLElement elem) {
143 if (elem.getName().equals(SrcTag)) {
145 URI pID = new URI(elem.getTextValue());
146 setSrcPeer(IDFactory.fromURI(pID));
147 } catch (URISyntaxException badID) {
148 throw new IllegalArgumentException("Bad PeerID ID in header: " + elem.getTextValue());
153 if (elem.getName().equals(MsgIdTag)) {
154 msgId = elem.getTextValue();
158 if (elem.getName().equals(PipeIdTag)) {
160 URI pipeID = new URI(elem.getTextValue());
161 setPipeID(IDFactory.fromURI(pipeID));
162 } catch (URISyntaxException badID) {
163 throw new IllegalArgumentException("Bad pipe ID in header");
168 if (elem.getName().equals(TTLTag)) {
169 TTL = Integer.parseInt(elem.getTextValue());
173 // IGNORE obsolete element "VisitedPeer"
174 return elem.getName().equals(PeerTag);
179 * internal method to process a document into a header.
181 * @param root where to start.
183 protected void initialize(Element root) {
184 if (!XMLElement.class.isInstance(root)) {
185 throw new IllegalArgumentException(getClass().getName() + " only supports XLMElement");
188 XMLElement doc = (XMLElement) root;
189 String doctype = doc.getName();
190 String typedoctype = "";
191 Attribute itsType = doc.getAttribute("type");
193 if (null != itsType) {
194 typedoctype = itsType.getValue();
197 if (!doctype.equals(Name) && !Name.equals(typedoctype)) {
198 throw new IllegalArgumentException(
199 "Could not construct : " + getClass().getName() + "from doc containing a " + doc.getName());
202 Enumeration elements = doc.getChildren();
203 while (elements.hasMoreElements()) {
204 XMLElement elem = (XMLElement) elements.nextElement();
206 if (!handleElement(elem)) {
207 if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
208 LOG.fine("Unhandled Element: " + elem.getName());
215 if (null == getMsgId()) {
216 throw new IllegalArgumentException("Header does not contain a message id");
219 if (ID.nullID == getPipeID()) {
220 throw new IllegalArgumentException("Header does not contain a pipe id");
224 throw new IllegalArgumentException("TTL must be >= 1");
229 * Returns the docment for this header
231 * @param encodeAs mime type encoding
232 * @return the docment for this header
234 public Document getDocument(MimeMediaType encodeAs) {
235 StructuredTextDocument doc = (StructuredTextDocument)
236 StructuredDocumentFactory.newStructuredDocument(encodeAs, Name);
238 if (doc instanceof XMLDocument) {
239 ((XMLDocument) doc).addAttribute("xmlns:jxta", "http://jxta.org");
242 if (null == getMsgId()) {
243 throw new IllegalStateException("Message id is not initialized");
246 if (ID.nullID == getPipeID()) {
247 throw new IllegalStateException("PipeID is not initialized");
251 throw new IllegalStateException("TTL must be >= 1");
255 if ((srcPeer != null) && (srcPeer != ID.nullID)) {
256 e = doc.createElement(SrcTag, srcPeer.toString());
260 e = doc.createElement(PipeIdTag, getPipeID().toString());
263 e = doc.createElement(MsgIdTag, getMsgId());
266 e = doc.createElement(TTLTag, Integer.toString(TTL));