/*

  * 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.view.facelets.el;

 import java.io.Externalizable;

 import java.io.IOException;

 import java.io.ObjectInput;

 import java.io.ObjectOutput;

 import javax.el.ELContext;

 import javax.el.ELException;

 import javax.el.PropertyNotFoundException;

 import javax.el.PropertyNotWritableException;

 import javax.el.ValueExpression;

 import javax.faces.FacesWrapper;

 import javax.faces.view.facelets.TagAttribute;

 /**

  * 

  * 

  * @author Jacob Hookom

  * @version $Id$

  */

 public class TagValueExpression extends ValueExpression implements Externalizable, FacesWrapper<ValueExpression>

 {

     private static final long serialVersionUID = 1L;

     // orig and attr need to be available in TagValueExpressionUEL

     ValueExpression orig; 

     String attr; 

     public TagValueExpression()

     {

         super();

     }

     public TagValueExpression(TagAttribute attr, ValueExpression orig)

     {

         this.attr = attr.toString();

         this.orig = orig;

     }

     public Class<?> getExpectedType()

     {

         return this.orig.getExpectedType();

     }

     public Class<?> getType(ELContext context)

     {

         try

         {

             return this.orig.getType(context);

         }

         catch (PropertyNotFoundException pnfe)

         {

             throw new PropertyNotFoundException(this.attr + ": " + pnfe.getMessage(), pnfe.getCause());

         }

         catch (ELException e)

         {

             throw new ELException(this.attr + ": " + e.getMessage(), e.getCause());

         }

     }

     public Object getValue(ELContext context)

     {

         try

         {

             return this.orig.getValue(context);

         }

         catch (PropertyNotFoundException pnfe)

         {

             throw new PropertyNotFoundException(this.attr + ": " + pnfe.getMessage(), pnfe.getCause());

         }

         catch (ELException e)

         {

             throw new ELException(this.attr + ": " + e.getMessage(), e.getCause());

         }

     }

     public boolean isReadOnly(ELContext context)

     {

         try

         {

             return this.orig.isReadOnly(context);

         }

         catch (PropertyNotFoundException pnfe)

         {

             throw new PropertyNotFoundException(this.attr + ": " + pnfe.getMessage(), pnfe.getCause());

         }

         catch (ELException e)

         {

             throw new ELException(this.attr + ": " + e.getMessage(), e.getCause());

         }

     }

     public void setValue(ELContext context, Object value)

     {

         try

         {

             this.orig.setValue(context, value);

         }

         catch (PropertyNotFoundException pnfe)

         {

             throw new PropertyNotFoundException(this.attr + ": " + pnfe.getMessage(), pnfe.getCause());

         }

         catch (PropertyNotWritableException pnwe)

         {

             throw new PropertyNotWritableException(this.attr + ": " + pnwe.getMessage(), pnwe.getCause());

         }

         catch (ELException e)

         {

             throw new ELException(this.attr + ": " + e.getMessage(), e.getCause());

         }

     }

     public boolean equals(Object obj)

     {

         return this.orig.equals(obj);

     }

     public String getExpressionString()

     {

         return this.orig.getExpressionString();

     }

     public int hashCode()

     {

         return this.orig.hashCode();

     }

     public boolean isLiteralText()

     {

         return this.orig.isLiteralText();

     }

     public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException

     {

         this.orig = (ValueExpression) in.readObject();

         this.attr = in.readUTF();

     }

     public void writeExternal(ObjectOutput out) throws IOException

     {

         out.writeObject(this.orig);

         out.writeUTF(this.attr);

     }

     public String toString()

     {

         return this.attr + ": " + this.orig;

     }

     public ValueExpression getWrapped()

     {

         return orig;

     }

 }