/*

  * 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 org.apache.myfaces.el.convert;

 import javax.el.ELException;

 import javax.el.MethodExpression;

 import javax.faces.component.StateHolder;

 import javax.faces.context.FacesContext;

 import javax.faces.el.EvaluationException;

 import javax.faces.el.MethodBinding;

 import javax.faces.el.MethodNotFoundException;

 /**

  * Converts a MethodExpression to a MethodBinding.  

  * See JSF 1.2 spec section 5.8.4

  *

  * ATTENTION: If you make changes to this class, treat 

  * javax.faces.component._MethodExpressionToMethodBinding

  * accordingly.

  *

  * @author Stan Silvert

  * @see javax.faces.component._MethodExpressionToMethodBinding

  */

 public final class MethodExpressionToMethodBinding extends MethodBinding implements StateHolder {

     private MethodExpression methodExpression;

     private boolean isTransient = false;

     public MethodExpressionToMethodBinding() {

         methodExpression = null;

     }

     /** Creates a new instance of MethodExpressionToMethodBinding */

     public MethodExpressionToMethodBinding(final MethodExpression methodExpression) {

         this.methodExpression = methodExpression;

     }

     @Override

     public String getExpressionString()

     {

         return methodExpression.getExpressionString();

     }

     public Class getType(FacesContext facesContext) 

         throws MethodNotFoundException {

         try {

             return methodExpression.getMethodInfo(facesContext.getELContext()).getReturnType();

         } catch (javax.el.MethodNotFoundException e) {

             throw new javax.faces.el.MethodNotFoundException(e);

         }

     }

     public Object invoke(final FacesContext facesContext, final Object[] params)

         throws EvaluationException, MethodNotFoundException {

         try {

             return methodExpression.invoke(facesContext.getELContext(), params);

         } catch (javax.el.MethodNotFoundException e) {

             throw new javax.faces.el.MethodNotFoundException(e);

         } catch (ELException e) {

             throw new EvaluationException(e.getCause());

         }

     }

 // -------- StateHolder methods -------------------------------------------    

     public void restoreState(final FacesContext context, final Object state) {

         methodExpression = (MethodExpression)state;

     }

     public Object saveState(final FacesContext context) {

         return methodExpression;

     }

     public void setTransient(final boolean newTransientValue) {

         isTransient = newTransientValue;

     }

     public boolean isTransient() {

         return isTransient;

     }

 }