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.OrderedReturn;
  import org.apache.commons.ognl.enhance.UnsupportedCompilationException;
  
  /**
   * $Id: ASTVarRef.java 1194869 2011-10-29 11:10:16Z mcucchiara $
   * @author Luke Blanshard (blanshlu@netscape.net)
   * @author Drew Davidson (drew@ognl.org)
   */
  public class ASTVarRef
      extends SimpleNode
      implements NodeType, OrderedReturn
  {
  
      private String name;
  
      protected Class getterClass;
  
      protected String core;
  
      protected String last;
  
      public ASTVarRef( int id )
      {
          super( id );
      }
  
      public ASTVarRef( OgnlParser p, int id )
      {
          super( p, id );
      }
  
      void setName( String name )
      {
          this.name = name;
      }
      /**
       * Get the variable name.
       *
       * @return the variable name.
       * @since 4.0
       */
      String getName()
      {
          return name;
      }
  
      protected Object getValueBody( OgnlContext context, Object source )
          throws OgnlException
      {
          return context.get( name );
      }
  
      protected void setValueBody( OgnlContext context, Object target, Object value )
          throws OgnlException
      {
          context.put( name, value );
      }
  
      public Class getGetterClass()
      {
          return getterClass;
      }
  
      public Class getSetterClass()
      {
          return null;
      }
  
      public String getCoreExpression()
      {
          return core;
      }
  
      public String getLastExpression()
      {
          return last;
      }
  
     public String toGetSourceString( OgnlContext context, Object target )
     {
         Object value = context.get( name );
 
         if ( value != null )
         {
 
             getterClass = value.getClass();
         }
 
         context.setCurrentType( getterClass );
         context.setCurrentAccessor( context.getClass() );
 
         context.setCurrentObject( value );
         // context.setRoot(context.get(name));
 
         if ( context.getCurrentObject() == null )
         {
             throw new UnsupportedCompilationException( "Current context object is null, can't compile var reference." );
         }
         
         String pre = "";
         String post = "";
         if ( context.getCurrentType() != null )
         {
             pre = "((" + OgnlRuntime.getCompiler( context ).getInterfaceClass( context.getCurrentType() ).getName() + ")";
             post = ")";
         }
 
         if ( parent != null && ASTAssign.class.isInstance( parent ) )
         {
             core = "$1.put(\"" + name + "\",";
             last = pre + "$1.get(\"" + name + "\")" + post;
 
             return core;
         }
 
         return pre + "$1.get(\"" + name + "\")" + post;
     }
 
     public String toSetSourceString( OgnlContext context, Object target )
     {
         return toGetSourceString( context, target );
     }
 
     public <R, P> R accept( NodeVisitor<? extends R, ? super P> visitor, P data )
         throws OgnlException
     {
         return visitor.visit( this, data );
     }
 }