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Smack/source/org/jivesoftware/smackx/workgroup/util/MetaDataUtils.java

103 lines
4 KiB
Java

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