107 lines
3.8 KiB
Java
107 lines
3.8 KiB
Java
/**
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*
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* Copyright 2003-2007 Jive Software.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.workgroup.util;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Hashtable;
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import java.util.List;
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import java.util.Map;
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import org.jivesoftware.smack.util.StringUtils;
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import org.jivesoftware.smackx.workgroup.MetaData;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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/**
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* Utility class for meta-data parsing and writing.
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*
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* @author Matt Tucker
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*/
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public class MetaDataUtils {
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/**
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* Parses any available meta-data and returns it as a Map of String name/value pairs. The
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* parser must be positioned at an opening meta-data tag, or the an empty map will be returned.
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*
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* @param parser the XML parser positioned at an opening meta-data tag.
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* @return the meta-data.
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* @throws XmlPullParserException if an error occurs while parsing the XML.
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* @throws IOException if an error occurs while parsing the XML.
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*/
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public static Map<String, List<String>> parseMetaData(XmlPullParser parser) throws XmlPullParserException, IOException {
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int eventType = parser.getEventType();
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// If correctly positioned on an opening meta-data tag, parse meta-data.
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if ((eventType == XmlPullParser.START_TAG)
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&& parser.getName().equals(MetaData.ELEMENT_NAME)
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&& parser.getNamespace().equals(MetaData.NAMESPACE)) {
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Map<String, List<String>> metaData = new Hashtable<>();
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eventType = parser.nextTag();
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// Keep parsing until we've gotten to end of meta-data.
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while ((eventType != XmlPullParser.END_TAG)
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|| !parser.getName().equals(MetaData.ELEMENT_NAME)) {
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String name = parser.getAttributeValue(0);
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String value = parser.nextText();
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if (metaData.containsKey(name)) {
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List<String> values = metaData.get(name);
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values.add(value);
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}
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else {
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List<String> values = new ArrayList<>();
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values.add(value);
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metaData.put(name, values);
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}
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eventType = parser.nextTag();
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}
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return metaData;
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}
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return Collections.emptyMap();
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}
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/**
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* Serializes a Map of String name/value pairs into the meta-data XML format.
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*
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* @param metaData the Map of meta-data as Map<String,List<String>>
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* @return the meta-data values in XML form.
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*/
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public static String serializeMetaData(Map<String, List<String>> metaData) {
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StringBuilder buf = new StringBuilder();
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if (metaData != null && metaData.size() > 0) {
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buf.append("<metadata xmlns=\"http://jivesoftware.com/protocol/workgroup\">");
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for (String key : metaData.keySet()) {
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List<String> value = metaData.get(key);
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for (String v : value) {
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buf.append("<value name=\"").append(key).append("\">");
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buf.append(StringUtils.escapeForXmlText(v));
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buf.append("</value>");
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}
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}
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buf.append("</metadata>");
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}
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return buf.toString();
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}
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}
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