/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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 javax.faces.component;

 import javax.faces.FacesException;

 import javax.faces.context.FacesContext;

 import javax.faces.el.EvaluationException;

 import javax.faces.el.MethodBinding;

 import javax.faces.event.AbortProcessingException;

 import javax.faces.event.FacesEvent;

 /**

  * Common base class for converting a MethodBinding to a FacesListener

  */

 abstract class _MethodBindingToListener implements StateHolder

 {

     protected MethodBinding methodBinding;

     public _MethodBindingToListener()

     {

     }

     /**

      * Creates a new instance of MethodBindingToListener

      */

     public _MethodBindingToListener(MethodBinding methodBinding)

     {

         if (methodBinding == null)

         {

             throw new NullPointerException("methodBinding can not be null");

         }

         if (!(methodBinding instanceof StateHolder))

         {

             throw new IllegalArgumentException("methodBinding must implement the StateHolder interface");

         }

         this.methodBinding = methodBinding;

     }

     private FacesContext getFacesContext()

     {

         return FacesContext.getCurrentInstance();

     }

     protected void invokeMethodBinding(FacesEvent event) throws AbortProcessingException

     {

         try

         {

             methodBinding.invoke(getFacesContext(), new Object[]{event});

         }

         catch (EvaluationException e)

         {

             Throwable cause = e.getCause();

             if (cause != null && cause instanceof AbortProcessingException)

             {

                 throw (AbortProcessingException) cause;

             }

             throw e;

         }

     }

     public MethodBinding getMethodBinding()

     {

         return methodBinding;

     }

     public void restoreState(FacesContext context, Object state)

     {

         Object[] stateArray = (Object[]) state;

         try

         {

             methodBinding = (MethodBinding) _ClassUtils.getContextClassLoader()

                     .loadClass((String) stateArray[0])

                     .newInstance();

         }

         catch (Exception e)

         {

             throw new FacesException(e);

         }

         ((StateHolder) methodBinding).restoreState(context, stateArray[1]);

     }

     public Object saveState(FacesContext context)

     {

         Object[] stateArray = new Object[2];

         stateArray[0] = methodBinding.getClass().getName();

         stateArray[1] = ((StateHolder) methodBinding).saveState(context);

         return stateArray;

     }

     public void setTransient(boolean newTransientValue)

     {

         ((StateHolder) methodBinding).setTransient(newTransientValue);

     }

     public boolean isTransient()

     {

         return ((StateHolder) methodBinding).isTransient();

     }

 }