Initial check-in.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@2369 b35dd754-fafc-0310-a699-88a17e54d16e

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

@@ -0,0 +1,90 @@
+/**
+ * $RCSfile$
+ * $Revision$
+ * $Date$
+ *
+ * Copyright (C) 1999-2003 Jive Software. All rights reserved.
+ *
+ * This software is the proprietary information of Jive Software.
+ * Use is subject to license terms.
+ */
+
+package org.jivesoftware.smackx.workgroup.util;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+import java.util.Map;
+import java.util.Iterator;
+import java.util.Hashtable;
+import java.util.Collections;
+import java.io.IOException;
+
+import org.jivesoftware.smackx.workgroup.MetaData;
+
+/**
+ * Utility class for meta-data parsing and writing.
+ *
+ * @author MattTucker
+ */
+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 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 metaData = new Hashtable();
+
+            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();
+
+                metaData.put(name, value);
+
+                eventType = parser.nextTag();
+            }
+
+            return metaData;
+        }
+
+        return Collections.EMPTY_MAP;
+    }
+
+    /**
+     * Serializes a Map of String name/value pairs into the meta-data XML format.
+     *
+     * @param metaData the Map of meta-data.
+     * @return the meta-data values in XML form.
+     */
+    public static String serializeMetaData(Map metaData) {
+        StringBuffer buf = new StringBuffer();
+        if (metaData != null && metaData.size() > 0) {
+            buf.append("<metadata xmlns=\"http://www.jivesoftware.com/workgroup/metadata\">");
+            for (Iterator i=metaData.keySet().iterator(); i.hasNext(); ) {
+                Object key = i.next();
+                String value = metaData.get(key).toString();
+                buf.append("<value name=\"").append(key).append("\">");
+                buf.append(value);
+                buf.append("</value>");
+            }
+            buf.append("</metadata>");
+        }
+        return buf.toString();
+    }
+}