Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | /**
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| 2 | * Copyright 2003-2007 Jive Software.
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| 3 | *
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| 4 | * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | */
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| 16 |
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| 17 | package org.jivesoftware.smackx.workgroup.util;
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| 18 |
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| 19 | import org.jivesoftware.smackx.workgroup.MetaData;
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| 20 | import org.jivesoftware.smack.util.StringUtils;
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| 21 | import org.xmlpull.v1.XmlPullParser;
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| 22 | import org.xmlpull.v1.XmlPullParserException;
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| 23 |
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| 24 | import java.io.IOException;
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| 25 | import java.util.*;
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| 26 |
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| 27 | /**
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| 28 | * Utility class for meta-data parsing and writing.
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| 29 | *
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| 30 | * @author Matt Tucker
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| 31 | */
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| 32 | public class MetaDataUtils {
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| 33 |
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| 34 | /**
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| 35 | * Parses any available meta-data and returns it as a Map of String name/value pairs. The
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| 36 | * parser must be positioned at an opening meta-data tag, or the an empty map will be returned.
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| 37 | *
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| 38 | * @param parser the XML parser positioned at an opening meta-data tag.
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| 39 | * @return the meta-data.
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| 40 | * @throws XmlPullParserException if an error occurs while parsing the XML.
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| 41 | * @throws IOException if an error occurs while parsing the XML.
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| 42 | */
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| 43 | public static Map<String, List<String>> parseMetaData(XmlPullParser parser) throws XmlPullParserException, IOException {
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| 44 | int eventType = parser.getEventType();
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| 45 |
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| 46 | // If correctly positioned on an opening meta-data tag, parse meta-data.
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| 47 | if ((eventType == XmlPullParser.START_TAG)
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| 48 | && parser.getName().equals(MetaData.ELEMENT_NAME)
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| 49 | && parser.getNamespace().equals(MetaData.NAMESPACE)) {
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| 50 | Map<String, List<String>> metaData = new Hashtable<String, List<String>>();
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| 51 |
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| 52 | eventType = parser.nextTag();
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| 53 |
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| 54 | // Keep parsing until we've gotten to end of meta-data.
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| 55 | while ((eventType != XmlPullParser.END_TAG)
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| 56 | || (!parser.getName().equals(MetaData.ELEMENT_NAME))) {
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| 57 | String name = parser.getAttributeValue(0);
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| 58 | String value = parser.nextText();
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| 59 |
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| 60 | if (metaData.containsKey(name)) {
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| 61 | List<String> values = metaData.get(name);
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| 62 | values.add(value);
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| 63 | }
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| 64 | else {
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| 65 | List<String> values = new ArrayList<String>();
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| 66 | values.add(value);
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| 67 | metaData.put(name, values);
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| 68 | }
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| 69 |
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| 70 | eventType = parser.nextTag();
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| 71 | }
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| 72 |
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| 73 | return metaData;
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| 74 | }
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| 75 |
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| 76 | return Collections.emptyMap();
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| 77 | }
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| 78 |
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| 79 | /**
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| 80 | * Serializes a Map of String name/value pairs into the meta-data XML format.
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| 81 | *
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| 82 | * @param metaData the Map of meta-data as Map<String,List<String>>
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| 83 | * @return the meta-data values in XML form.
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| 84 | */
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| 85 | public static String serializeMetaData(Map<String, List<String>> metaData) {
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| 86 | StringBuilder buf = new StringBuilder();
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| 87 | if (metaData != null && metaData.size() > 0) {
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| 88 | buf.append("<metadata xmlns=\"http://jivesoftware.com/protocol/workgroup\">");
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| 89 | for (Iterator<String> i = metaData.keySet().iterator(); i.hasNext();) {
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| 90 | String key = i.next();
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| 91 | List<String> value = metaData.get(key);
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| 92 | for (Iterator<String> it = value.iterator(); it.hasNext();) {
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| 93 | String v = it.next();
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| 94 | buf.append("<value name=\"").append(key).append("\">");
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| 95 | buf.append(StringUtils.escapeForXML(v));
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| 96 | buf.append("</value>");
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| 97 | }
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| 98 | }
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| 99 | buf.append("</metadata>");
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| 100 | }
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| 101 | return buf.toString();
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| 102 | }
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| 103 | }
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