EventWho.java

/* Copyright (c) 2008 Google Inc.
 *
 * 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 com.google.gdata.data.calendar;

import com.google.gdata.data.ExtensionDescription;
import com.google.gdata.data.ExtensionProfile;
import com.google.gdata.data.extensions.Who;
import com.google.gdata.util.Namespaces;
import com.google.gdata.util.ParseException;
import com.google.gdata.util.XmlParser;

import org.xml.sax.Attributes;

import java.io.IOException;

/**
 * Calendar extensions to the base-level Who processing for calendar
 * events.
 *
 * 
 */
public class EventWho extends Who {

  // ResourceProperty state is stored as an extension element on the base
  // class, so it will be output by the generateExtensions() call in
  // Who.generate().
 
  public ResourceProperty getResource() {
    return getExtension(ResourceProperty.class);
  }

  public void setResource(ResourceProperty resource) {
    setExtension(resource);
  }

  /** Returns a suggested extension description, which is repeatable. */
  public static ExtensionDescription getDefaultDescription() {
    return getDefaultDescription(true);
  }

  /**
   * Returns a suggested extension description,
   * which may be repeatable or not.
   */
  public static ExtensionDescription getDefaultDescription(boolean repeatable) {
    ExtensionDescription desc = new ExtensionDescription();
    desc.setExtensionClass(EventWho.class);
    desc.setNamespace(Namespaces.gNs);
    desc.setLocalName("who");
    desc.setRepeatable(repeatable);
    return desc;
  }

  @Override
  public XmlParser.ElementHandler getHandler(ExtensionProfile extProfile,
                                             String namespace,
                                             String localName,
                                             Attributes attrs) {

    return new Handler(extProfile);
  }


  /** Extends <g:who> parser. */
  private class Handler extends Who.Handler {


    public Handler(ExtensionProfile extProfile) {

      super(extProfile, EventWho.class);
    }

    @Override
    public XmlParser.ElementHandler getChildHandler(String namespace,
                                                    String localName,
                                                    Attributes attrs)
        throws ParseException, IOException {


      if (namespace.equals(com.google.gdata.data.calendar.Namespaces.gCal)) {
        if (localName.equals("resource")) {
          ResourceProperty resource = new ResourceProperty();
          setResource(resource);
          return resource.getHandler(extProfile, namespace, localName, attrs);
        }
      }

      return super.getChildHandler(namespace, localName, attrs);
    }
  }
}