/*

  * Copyright 2007-2010 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  *

  * 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.kuali.rice.core.util.jaxb;

 import javax.xml.bind.annotation.adapters.XmlAdapter;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 /**

  * Do JAXB mapping of Map<String, String> to a format like the following for a

  * map containing { key1:value1, key2:value2 }:

  * 

  * <pre>

  * {@code

  * <...>

  *   <entry key="key1">value1</entry>

  *   <entry key="key2">value2</entry>

  * </...>

  * }

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  *

  */

 public class MapStringStringAdapter extends XmlAdapter<StringMapEntryList, Map<String, String>> {

         @Override

         public StringMapEntryList marshal(Map<String, String> map) throws Exception {

                 if (map == null) {

                         return null;

                 }

                 List<StringMapEntry> entries = new ArrayList<StringMapEntry>();

                 for (Map.Entry<String, String> entry : map.entrySet()) {

                         entries.add(new StringMapEntry(entry));

                 }

                 return new StringMapEntryList(entries);

         }

         @Override

         public Map<String, String> unmarshal(StringMapEntryList entryList) throws Exception {

                 if (entryList == null || entryList.getEntries() == null) {

                         return null;

                 }

                 List<StringMapEntry> entries = entryList.getEntries();

                 Map<String, String> resultMap = new HashMap<String, String>(entries.size());

                 for (StringMapEntry entry : entries) {

                         resultMap.put(entry.getKey(), entry.getValue());

                 }

                 return Collections.unmodifiableMap(resultMap);

         }

 }