package org.apache.commons.ognl;

 /*

  * 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.

  */

 import org.apache.commons.ognl.enhance.UnsupportedCompilationException;

 /**

  * $Id: ASTEval.java 1235614 2012-01-25 03:31:12Z mcucchiara $

  * @author Luke Blanshard (blanshlu@netscape.net)

  * @author Drew Davidson (drew@ognl.org)

  */

 class ASTEval

     extends SimpleNode

 {

     public ASTEval( int id )

     {

         super( id );

     }

     public ASTEval( OgnlParser p, int id )

     {

         super( p, id );

     }

     protected Object getValueBody( OgnlContext context, Object source )

         throws OgnlException

     {

         Object result, expr = children[0].getValue( context, source ), previousRoot = context.getRoot();

         Node node;

         source = children[1].getValue( context, source );

         node = ( expr instanceof Node ) ? (Node) expr : (Node) Ognl.parseExpression( expr.toString() );

         try

         {

             context.setRoot( source );

             result = node.getValue( context, source );

         }

         finally

         {

             context.setRoot( previousRoot );

         }

         return result;

     }

     protected void setValueBody( OgnlContext context, Object target, Object value )

         throws OgnlException

     {

         Object expr = children[0].getValue( context, target ), previousRoot = context.getRoot();

         Node node;

         target = children[1].getValue( context, target );

         node = ( expr instanceof Node ) ? (Node) expr : (Node) Ognl.parseExpression( expr.toString() );

         try

         {

             context.setRoot( target );

             node.setValue( context, target, value );

         }

         finally

         {

             context.setRoot( previousRoot );

         }

     }

     public String toGetSourceString( OgnlContext context, Object target )

     {

         throw new UnsupportedCompilationException( "Eval expressions not supported as native java yet." );

     }

     public String toSetSourceString( OgnlContext context, Object target )

     {

         throw new UnsupportedCompilationException( "Map expressions not supported as native java yet." );

     }

     public <R, P> R accept( NodeVisitor<? extends R, ? super P> visitor, P data )

         throws OgnlException

     {

         return visitor.visit( this, data );

     }

     @Override

     public boolean isEvalChain( OgnlContext context )

         throws OgnlException

     {

         return true;

     }

 }