/rabbit.data.handler/src/rabbit/data/handler/DataHandler.java

/*

 * Copyright 2010 The Rabbit Eclipse Plug-in Project

 * 

 * 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 rabbit.data.handler;



import rabbit.data.access.IAccessor;

import rabbit.data.access.model.ICommandData;

import rabbit.data.access.model.IFileData;

import rabbit.data.access.model.IJavaData;

import rabbit.data.access.model.ILaunchData;

import rabbit.data.access.model.IPartData;

import rabbit.data.access.model.IPerspectiveData;

import rabbit.data.access.model.ISessionData;

import rabbit.data.access.model.ITaskData;

import rabbit.data.store.IStorer;

import rabbit.data.store.model.CommandEvent;

import rabbit.data.store.model.FileEvent;

import rabbit.data.store.model.JavaEvent;

import rabbit.data.store.model.LaunchEvent;

import rabbit.data.store.model.PartEvent;

import rabbit.data.store.model.PerspectiveEvent;

import rabbit.data.store.model.SessionEvent;

import rabbit.data.store.model.TaskFileEvent;

import rabbit.data.xml.XmlModule;



import com.google.inject.ConfigurationException;

import com.google.inject.Guice;

import com.google.inject.Injector;

import com.google.inject.Key;

import com.google.inject.util.Types;



/**

 * Handler class provider common classes to access the data.

 */

public class DataHandler {



  private static final Injector injector;



  static {

    injector = Guice.createInjector(new XmlModule());

  }



  /**

   * Gets a storer that stores the objects of the given type.

   * <p>

   * The following object types are supported:

   * <ul>

   * <li>{@link CommandEvent}</li>

   * <li>{@link FileEvent}</li>

   * <li>{@link PartEvent}</li>

   * <li>{@link PerspectiveEvent}</li>

   * <li>{@link LaunchEvent}</li>

   * <li>{@link TaskFileEvent}</li>

   * <li>{@link SessionEvent}</li>

   * <li>{@link JavaEvent}</li>

   * </ul>

   * </p>

   * 

   * @param clazz The class of the type.

   * @return A storer that stores the objects of the given type, or null.

   */

  @SuppressWarnings("unchecked")

  public static <T> IStorer<T> getStorer(Class<T> clazz) {

    try {

      Key<?> k = Key.get(Types.newParameterizedType(IStorer.class, clazz));

      return (IStorer<T>) injector.getInstance(k);



    } catch (ConfigurationException e) {

      return null;

    }

  }



  /**

   * Gets an accessor that gets the stored data.

   * <p>

   * The following object types are supported:

   * <ul>

   * <li>{@link ICommandData}</li>

   * <li>{@link IFileData}</li>

   * <li>{@link IPartData}</li>

   * <li>{@link IPerspectiveData}</li>

   * <li>{@link ILaunchData}</li>

   * <li>{@link ITaskData}</li>

   * <li>{@link ISessionData}</li>

   * <li>{@link IJavaData}</li>

   * </ul>

   * </p>

   * 

   * @param clazz The class of the type.

   * @return An accessor that get the data of the given type, or null.

   */

  @SuppressWarnings("unchecked")

  public static <T> IAccessor<T> getAccessor(Class<T> clazz) {

    try {

      Key<?> k = Key.get(Types.newParameterizedType(IAccessor.class, clazz));

      return (IAccessor<T>) injector.getInstance(k);



    } catch (ConfigurationException e) {

      return null;

    }

  }



  private DataHandler() {}

}