/**
 * Copyright (C) 2003-2008 eXo Platform SAS.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see<http://www.gnu.org/licenses/>.
 */

package org.etk.core.rest.util;

import java.util.ArrayList;
import java.util.List;

import javax.ws.rs.core.MediaType;

import org.etk.core.rest.ExtMultivaluedMap;

public class MediaTypeMultivaluedMap<V> extends MediaTypeMap<List<V>> implements ExtMultivaluedMap<MediaType, V> {

  /**
   * Generated by Eclipse.
   */
  private static final long serialVersionUID = 7082102018450744774L;

  /**
   * Get {@link List} with specified key. If it does not exist new one be
   * created.
   * 
   * @param mediaType MediaType
   * @return List of ProviderFactory if no value mapped to the specified key
   *         then empty list will be returned instead null
   */
  public List<V> getList(MediaType mediaType) {
    List<V> l = get(mediaType);
    if (l == null) {
      l = new ArrayList<V>();
      put(mediaType, l);
    }
    return l;
  }

  /**
   * {@inheritDoc}
   */
  public void add(MediaType mediaType, V value) {
    if (value == null)
      return;
    List<V> list = getList(mediaType);
    list.add(value);
  }

  /**
   * {@inheritDoc}
   */
  public V getFirst(MediaType mime) {
    List<V> list = get(mime);
    return list != null && list.size() > 0 ? list.get(0) : null; 
  }

  /**
   * {@inheritDoc}
   */
  public void putSingle(MediaType mediaType, V value) {
    if (value == null)
      return;
    List<V> list = getList(mediaType);
    list.clear();
    list.add(value);
  }

}