/*
 * Copyright 2012  Research Studios Austria Forschungsges.m.b.H.
 *
 *    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 won.owner.protocol.message.base;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import won.owner.protocol.message.OwnerCallback;
import won.protocol.message.WonMessage;
import won.protocol.model.Connection;
import won.protocol.model.Match;
import won.protocol.util.WonRdfUtils;

/**
 * Simple implementation of the WonMessageHandlerAdapter that extracts the
 * information needed to create the Connection and Match objects directly
 * from the available message without using additional storage. This means
 * that the Connection's state and type properties are never available, as they
 * are not part of messages.
 * Use with care.
 */
public class MessageExtractingOwnerCallbackAdapter extends OwnerCallbackAdapter
{

  public MessageExtractingOwnerCallbackAdapter(OwnerCallback adaptee) {
    super(adaptee);
  }

  public MessageExtractingOwnerCallbackAdapter() {
  }

  @Override
  protected Connection makeConnection(WonMessage wonMessage) {
    return toConnection(wonMessage);
  }

  @Override
  protected Match makeMatch(WonMessage wonMessage) {
    return WonRdfUtils.MessageUtils.toMatch(wonMessage);
  }

  /**
   * Creates a connection object representing the connection
   * that the wonMessage is addressed at, if any.
   * The resulting Connection object will not have a state or type property set.
   * @param wonMessage or null if the message is not directed at
   *                   a connection
   */
  private Connection toConnection(WonMessage wonMessage) {
    Connection con = new Connection();
    con.setConnectionURI(wonMessage.getReceiverURI());
    con.setRemoteConnectionURI(wonMessage.getSenderURI());
    con.setNeedURI(wonMessage.getReceiverNeedURI());
    con.setRemoteNeedURI(wonMessage.getSenderNeedURI());
    return con;
  }

  @Autowired(required = false)
  @Qualifier("default")
  public void setAdaptee(OwnerCallback adaptee) {
    super.setAdaptee(adaptee);
  }
}