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: ASTTest.java 1194869 2011-10-29 11:10:16Z mcucchiara $
   * @author Luke Blanshard (blanshlu@netscape.net)
   * @author Drew Davidson (drew@ognl.org)
   */
  class ASTTest
      extends ExpressionNode
  {
      public ASTTest( int id )
      {
          super( id );
      }
  
      public ASTTest( OgnlParser p, int id )
      {
          super( p, id );
      }
  
      protected Object getValueBody( OgnlContext context, Object source )
          throws OgnlException
      {
          Object test = children[0].getValue( context, source );
          int branch = OgnlOps.booleanValue( test ) ? 1 : 2;
          return children[branch].getValue( context, source );
      }
  
      protected void setValueBody( OgnlContext context, Object target, Object value )
          throws OgnlException
      {
          Object test = children[0].getValue( context, target );
          int branch = OgnlOps.booleanValue( test ) ? 1 : 2;
          children[branch].setValue( context, target, value );
      }
  
      public String getExpressionOperator( int index )
      {
          return ( index == 1 ) ? "?" : ":";
      }
  
      public String toGetSourceString( OgnlContext context, Object target )
      {
          if ( target == null )
          {
              throw new UnsupportedCompilationException( "evaluation resulted in null expression." );
          }
          
          if ( children.length != 3 )
          {
              throw new UnsupportedCompilationException( "Can only compile test expressions with two children."
                  + children.length );
          }
          
          String result = "";
  
          try
          {
  
              String first = OgnlRuntime.getChildSource( context, target, children[0] );
              if ( !OgnlRuntime.isBoolean( first ) && !context.getCurrentType().isPrimitive() )
              {
                  first = OgnlRuntime.getCompiler( context ).createLocalReference( context, first, context.getCurrentType() );
              }
              
              if ( ExpressionNode.class.isInstance( children[0] ) )
              {
                  first = "(" + first + ")";
              }
  
              String second = OgnlRuntime.getChildSource( context, target, children[1] );
              Class secondType = context.getCurrentType();
  
              if ( !OgnlRuntime.isBoolean( second ) && !context.getCurrentType().isPrimitive() )
              {
                  second = OgnlRuntime.getCompiler( context ).createLocalReference( context, second, context.getCurrentType() );
              }
              
             if ( ExpressionNode.class.isInstance( children[1] ) )
             {
                 second = "(" + second + ")";
             }
 
             String third = OgnlRuntime.getChildSource( context, target, children[2] );
             Class thirdType = context.getCurrentType();
 
             if ( !OgnlRuntime.isBoolean( third ) && !context.getCurrentType().isPrimitive() )
             {
                 third = OgnlRuntime.getCompiler( context ).createLocalReference( context, third, context.getCurrentType() );
             
             }
             
             if ( ExpressionNode.class.isInstance( children[2] ) )
             {
                 third = "(" + third + ")";
             }
 
             boolean mismatched =
                 ( secondType.isPrimitive( ) && !thirdType.isPrimitive( ) ) || ( !secondType.isPrimitive( )
                     && thirdType.isPrimitive( ) );
 
             result += "org.apache.commons.ognl.OgnlOps.booleanValue(" + first + ")";
 
             result += " ? ";
 
             result += ( mismatched ? " ($w) " : "" ) + second;
             result += " : ";
 
             result += ( mismatched ? " ($w) " : "" ) + third;
 
             context.setCurrentObject( target );
             context.setCurrentType( mismatched ? Object.class : secondType );
 
             return result;
 
         }
         catch ( NullPointerException e )
         {
 
             // expected to happen in some instances
             throw new UnsupportedCompilationException( "evaluation resulted in null expression." );
         }
         catch ( Throwable t )
         {
             throw OgnlOps.castToRuntime( t );
         }
     }
     
     public <R, P> R accept( NodeVisitor<? extends R, ? super P> visitor, P data )
         throws OgnlException
     {
         return visitor.visit( this, data );
     }
 }