1 /** 2 * Copyright 2003-2007 Jive Software. 3 * 4 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.jivesoftware.smackx.workgroup.util; 18 19 import org.jivesoftware.smackx.workgroup.MetaData; 20 import org.jivesoftware.smack.util.StringUtils; 21 import org.xmlpull.v1.XmlPullParser; 22 import org.xmlpull.v1.XmlPullParserException; 23 24 import java.io.IOException; 25 import java.util.*; 26 27 /** 28 * Utility class for meta-data parsing and writing. 29 * 30 * @author Matt Tucker 31 */ 32 public class MetaDataUtils { 33 34 /** 35 * Parses any available meta-data and returns it as a Map of String name/value pairs. The 36 * parser must be positioned at an opening meta-data tag, or the an empty map will be returned. 37 * 38 * @param parser the XML parser positioned at an opening meta-data tag. 39 * @return the meta-data. 40 * @throws XmlPullParserException if an error occurs while parsing the XML. 41 * @throws IOException if an error occurs while parsing the XML. 42 */ 43 public static Map<String, List<String>> parseMetaData(XmlPullParser parser) throws XmlPullParserException, IOException { 44 int eventType = parser.getEventType(); 45 46 // If correctly positioned on an opening meta-data tag, parse meta-data. 47 if ((eventType == XmlPullParser.START_TAG) 48 && parser.getName().equals(MetaData.ELEMENT_NAME) 49 && parser.getNamespace().equals(MetaData.NAMESPACE)) { 50 Map<String, List<String>> metaData = new Hashtable<String, List<String>>(); 51 52 eventType = parser.nextTag(); 53 54 // Keep parsing until we've gotten to end of meta-data. 55 while ((eventType != XmlPullParser.END_TAG) 56 || (!parser.getName().equals(MetaData.ELEMENT_NAME))) { 57 String name = parser.getAttributeValue(0); 58 String value = parser.nextText(); 59 60 if (metaData.containsKey(name)) { 61 List<String> values = metaData.get(name); 62 values.add(value); 63 } 64 else { 65 List<String> values = new ArrayList<String>(); 66 values.add(value); 67 metaData.put(name, values); 68 } 69 70 eventType = parser.nextTag(); 71 } 72 73 return metaData; 74 } 75 76 return Collections.emptyMap(); 77 } 78 79 /** 80 * Serializes a Map of String name/value pairs into the meta-data XML format. 81 * 82 * @param metaData the Map of meta-data as Map<String,List<String>> 83 * @return the meta-data values in XML form. 84 */ 85 public static String serializeMetaData(Map<String, List<String>> metaData) { 86 StringBuilder buf = new StringBuilder(); 87 if (metaData != null && metaData.size() > 0) { 88 buf.append("<metadata xmlns=\"http://jivesoftware.com/protocol/workgroup\">"); 89 for (Iterator<String> i = metaData.keySet().iterator(); i.hasNext();) { 90 String key = i.next(); 91 List<String> value = metaData.get(key); 92 for (Iterator<String> it = value.iterator(); it.hasNext();) { 93 String v = it.next(); 94 buf.append("<value name=\"").append(key).append("\">"); 95 buf.append(StringUtils.escapeForXML(v)); 96 buf.append("</value>"); 97 } 98 } 99 buf.append("</metadata>"); 100 } 101 return buf.toString(); 102 } 103 } 104
