1 /** 2 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); 3 * you may not use this file except in compliance with the License. 4 * You may obtain a copy of the License at 5 * 6 * http://www.apache.org/licenses/LICENSE-2.0 7 * 8 * Unless required by applicable law or agreed to in writing, software 9 * distributed under the License is distributed on an "AS IS" BASIS, 10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 * See the License for the specific language governing permissions and 12 * limitations under the License. 13 */ 14 15 package org.jivesoftware.smackx.packet; 16 17 import java.util.Collection; 18 import java.util.Collections; 19 20 import org.jivesoftware.smack.packet.PacketExtension; 21 22 /** 23 * Extension representing a list of headers as specified in <a href="http://xmpp.org/extensions/xep-0131">Stanza Headers and Internet Metadata (SHIM)</a> 24 * 25 * @see Header 26 * 27 * @author Robin Collier 28 */ 29 public class HeadersExtension implements PacketExtension 30 { 31 public static final String NAMESPACE = "http://jabber.org/protocol/shim"; 32 33 private Collection<Header> headers = Collections.EMPTY_LIST; 34 HeadersExtension(Collection<Header> headerList)35 public HeadersExtension(Collection<Header> headerList) 36 { 37 if (headerList != null) 38 headers = headerList; 39 } 40 getHeaders()41 public Collection<Header> getHeaders() 42 { 43 return headers; 44 } 45 getElementName()46 public String getElementName() 47 { 48 return "headers"; 49 } 50 getNamespace()51 public String getNamespace() 52 { 53 return NAMESPACE; 54 } 55 toXML()56 public String toXML() 57 { 58 StringBuilder builder = new StringBuilder("<" + getElementName() + " xmlns='" + getNamespace() + "'>"); 59 60 for (Header header : headers) 61 { 62 builder.append(header.toXML()); 63 } 64 builder.append("</" + getElementName() + '>'); 65 66 return builder.toString(); 67 } 68 69 } 70