/*

  * Copyright 2004-2008 the Seasar Foundation and the Others.

  *

  * 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 org.seasar.uruma.binding.method;

 import java.lang.reflect.Method;

 import org.eclipse.jface.viewers.StructuredViewer;

 import org.seasar.uruma.annotation.AsyncMethod;

 import org.seasar.uruma.binding.method.impl.OmissionArgumentsFilter;

 import org.seasar.uruma.binding.method.impl.StructuredSelectionArgumentsFilter;

 import org.seasar.uruma.binding.method.impl.TypedEventArgumentsFilter;

 import org.seasar.uruma.context.WidgetHandle;

 import org.seasar.uruma.rcp.core.UrumaBundleState;

 import org.seasar.uruma.rcp.core.UrumaBundleState.BundleState;

 /**

  * {@link MethodBinding} を生成するためのファクトリクラスです。<br />

  * 

  * @author y-komori

  */

 public class MethodBindingFactory {

     private MethodBindingFactory() {

     }

     /**

      * {@link MethodBinding} を生成します。<br />

      * 

      * @param target

      *            ターゲットオブジェクト

      * @param method

      *            ターゲットメソッド

      * @param handle

      *            呼び出し元となるウィジットを保持する {@link WidgetHandle} オブジェクト

      * @param asyncMethod

      *            非同期実行を行う場合はそのアノテーション

      * @return {@link MethodBinding} オブジェクト

      */

     public static MethodBinding createMethodBinding(final Object target,

             final Method method, final WidgetHandle handle,

             final AsyncMethod asyncMethod) {

         MethodBinding binding;

         if (asyncMethod == null

                 || UrumaBundleState.getInstance().getUrumaBundleState() == BundleState.NOT_AVAILABLE) {

             binding = new MethodBinding(target, method, null);

         } else {

             binding = new AsyncMethodBinding(target, method, null);

             ((AsyncMethodBinding) binding).setTaskNameProperty(asyncMethod

                     .nameProperty());

             ((AsyncMethodBinding) binding).setCancelable(asyncMethod

                     .cancelable());

         }

         Class<?> widgetClass = handle.getWidgetClass();

         if (StructuredViewer.class.isAssignableFrom(widgetClass)) {

             binding.addArgumentsFilter(new StructuredSelectionArgumentsFilter(

                     method));

         } else {

             binding.addArgumentsFilter(new OmissionArgumentsFilter(method));

             binding.addArgumentsFilter(new TypedEventArgumentsFilter(method));

         }

         return binding;

     }

 }