/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements. See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership. The ASF licenses this file

  * to you 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.apache.shindig.social.core.util.xstream;

 import com.thoughtworks.xstream.converters.MarshallingContext;

 import com.thoughtworks.xstream.converters.UnmarshallingContext;

 import com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter;

 import com.thoughtworks.xstream.io.HierarchicalStreamReader;

 import com.thoughtworks.xstream.io.HierarchicalStreamWriter;

 import com.thoughtworks.xstream.mapper.Mapper;

 import org.apache.shindig.social.opensocial.spi.RestfulCollection;

 /**

  * This converter changes the way in which a collection is serialized

  * 

  */

 public class RestfullCollectionConverter extends AbstractCollectionConverter {

   /**

    * @param mapper

    */

   public RestfullCollectionConverter(Mapper mapper) {

     super(mapper);

   }

   /**

    * {@inheritDoc}

    * 

    * @see com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter#canConvert(java.lang.Class)

    */

   @Override

   public boolean canConvert(Class clazz) {

     boolean convert = (RestfulCollection.class.isAssignableFrom(clazz));

     return convert;

   }

   /**

    * {@inheritDoc}

    * 

    * @see com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter#marshal(java.lang.Object,

    *      com.thoughtworks.xstream.io.HierarchicalStreamWriter,

    *      com.thoughtworks.xstream.converters.MarshallingContext)

    */

   @Override

   public void marshal(Object source, HierarchicalStreamWriter writer,

       MarshallingContext context) {

     RestfulCollection<?> collection = (RestfulCollection<?>) source;

     writer.startNode("startIndex");

     writer.setValue(String.valueOf(collection.getStartIndex()));

     writer.endNode();

     writer.startNode("totalResults");

     writer.setValue(String.valueOf(collection.getTotalResults()));

     writer.endNode();

     writer.startNode("isFiltered");

     writer.setValue(String.valueOf(collection.isFiltered()));

     writer.endNode();

     writer.startNode("isSorted");

     writer.setValue(String.valueOf(collection.isSorted()));

     writer.endNode();

     writer.startNode("isUpdatedSince");

     writer.setValue(String.valueOf(collection.isUpdatedSince()));

     writer.endNode();

     // TODO: resolve if entry is the container or the name of the object.

     for (Object o : collection.getEntry()) {

       writer.startNode("entry");

       writeItem(o, context, writer);

       writer.endNode();

     }

   }

   /**

    * {@inheritDoc}

    * 

    * @see com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter#unmarshal(com.thoughtworks.xstream.io.HierarchicalStreamReader,

    *      com.thoughtworks.xstream.converters.UnmarshallingContext)

    */

   @Override

   public Object unmarshal(HierarchicalStreamReader arg0,

       UnmarshallingContext arg1) {

     // TODO Auto-generated method stub

     return null;

   }

 }