001 package org.apache.commons.ognl;
002
003 /*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements. See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership. The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License. You may obtain a copy of the License at
011 *
012 * http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied. See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022 import org.apache.commons.ognl.enhance.ExpressionCompiler;
023
024 /**
025 * $Id: ASTRootVarRef.java 1194869 2011-10-29 11:10:16Z mcucchiara $
026 * @author Luke Blanshard (blanshlu@netscape.net)
027 * @author Drew Davidson (drew@ognl.org)
028 */
029 public class ASTRootVarRef
030 extends ASTVarRef
031 {
032 public ASTRootVarRef( int id )
033 {
034 super( id );
035 }
036
037 public ASTRootVarRef( OgnlParser p, int id )
038 {
039 super( p, id );
040 }
041
042 protected Object getValueBody( OgnlContext context, Object source )
043 throws OgnlException
044 {
045 return context.getRoot();
046 }
047
048 protected void setValueBody( OgnlContext context, Object target, Object value )
049 throws OgnlException
050 {
051 context.setRoot( value );
052 }
053
054 public String toGetSourceString( OgnlContext context, Object target )
055 {
056 if ( target != null )
057 {
058 getterClass = target.getClass();
059 }
060
061 if ( getterClass != null )
062 {
063
064 context.setCurrentType( getterClass );
065 }
066
067 if ( parent == null || ( getterClass != null && getterClass.isArray() ) )
068 {
069 return "";
070 }
071 else
072 {
073 return ExpressionCompiler.getRootExpression( this, target, context );
074 }
075 }
076
077 public String toSetSourceString( OgnlContext context, Object target )
078 {
079 if ( parent == null || ( getterClass != null && getterClass.isArray() ) )
080 {
081 return "";
082 }
083 else
084 {
085 return "$3";
086 }
087 }
088
089 public <R, P> R accept( NodeVisitor<? extends R, ? super P> visitor, P data )
090 throws OgnlException
091 {
092 return visitor.visit( this, data );
093 }
094 }