/*

  * 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 javax.el.VariableMapper;

 /**

  * Defines an interface to detect when an EL expression has been

  * resolved by a facelets variable mapper and in that way allow cache it

  * if it is possible. This class should be implemented by any 

  * "facelets contextual" variable mapper.

  * 

  * @since 2.0.8

  * @author Leonardo Uribe

  *

  */

 public abstract class VariableMapperBase extends VariableMapper

 {

     /**

      * Check if a variable has been resolved by this variable mapper

      * or any parent "facelets contextual" variable mapper.

      * 

      * @return

      */

     public abstract boolean isAnyFaceletsVariableResolved();

     /**

      * Indicates an expression will be resolved, so preparations

      * should be done to detect if a contextual variable has been resolved.

      */

     public abstract void beforeConstructELExpression();

     /**

      * Cleanup all initialization done.

      */

     public abstract void afterConstructELExpression();

 }