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.ExpressionCompiler;

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

 /**

  * $Id: ASTAnd.java 1194869 2011-10-29 11:10:16Z mcucchiara $

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

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

  */

 public class ASTAnd

     extends BooleanExpression

 {

     /** Serial */

     private static final long serialVersionUID = -4585941425250141812L;

     /**

      * TODO: javadoc

      * @param id the id

      */

     public ASTAnd( int id )

     {

         super( id );

     }

     /**

      * TODO: javadoc

      * @param p the parser

      * @param id the id

      */

     public ASTAnd( OgnlParser p, int id )

     {

         super( p, id );

     }

     /* (non-Javadoc)

      * @see org.apache.commons.ognl.SimpleNode#jjtClose()

      */

     public void jjtClose()

     {

         flattenTree();

     }

     /* (non-Javadoc)

      * @see org.apache.commons.ognl.SimpleNode#getValueBody(org.apache.commons.ognl.OgnlContext, java.lang.Object)

      */

     protected Object getValueBody( OgnlContext context, Object source )

         throws OgnlException

     {

         Object result = null;

         int last = children.length - 1;

         for ( int i = 0; i <= last; ++i )

         {

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

             if ( i != last && !OgnlOps.booleanValue( result ) )

             {

                 break;

             }

         }

         return result;

     }

     /* (non-Javadoc)

      * @see org.apache.commons.ognl.SimpleNode#setValueBody(org.apache.commons.ognl.OgnlContext, java.lang.Object, java.lang.Object)

      */

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

         throws OgnlException

     {

         int last = children.length - 1;

         for ( int i = 0; i < last; ++i )

         {

             Object v = children[i].getValue( context, target );

             if ( !OgnlOps.booleanValue( v ) )

             {

                 return;

             }

         }

         children[last].setValue( context, target, value );

     }

     /* (non-Javadoc)

      * @see org.apache.commons.ognl.ExpressionNode#getExpressionOperator(int)

      */

     public String getExpressionOperator( int index )

     {

         return "&&";

     }

     /* (non-Javadoc)

      * @see org.apache.commons.ognl.BooleanExpression#getGetterClass()

      */

     public Class getGetterClass()

     {

         return null;

     }

     /* (non-Javadoc)

      * @see org.apache.commons.ognl.BooleanExpression#toGetSourceString(org.apache.commons.ognl.OgnlContext, java.lang.Object)

      */

     public String toGetSourceString( OgnlContext context, Object target )

     {

         if ( children.length != 2 )

         {

             throw new UnsupportedCompilationException(

                 "Can only compile boolean expressions with two children." );

         }

         String result = "";

         try

         {

             String first = OgnlRuntime.getChildSource( context, target, children[0] );

             if ( !OgnlOps.booleanValue( context.getCurrentObject() ) )

             {

                 throw new UnsupportedCompilationException(

                     "And expression can't be compiled until all conditions are true." );

             }

             if ( !OgnlRuntime.isBoolean( first ) && !context.getCurrentType().isPrimitive() )

             {

                 first = OgnlRuntime.getCompiler( context ).createLocalReference( context, first, context.getCurrentType() );

             }

             String second = OgnlRuntime.getChildSource( context, target, children[1] );

             if ( !OgnlRuntime.isBoolean( second ) && !context.getCurrentType().isPrimitive() )

             {

                 second = OgnlRuntime.getCompiler( context ).createLocalReference( context, second, context.getCurrentType() );

             }

             result += "(org.apache.commons.ognl.OgnlOps.booleanValue(" + first + ")";

             result += " ? ";

             result += " ($w) (" + second + ")";

             result += " : ";

             result += " ($w) (" + first + ")";

             result += ")";

             context.setCurrentObject( target );

             context.setCurrentType( Object.class );

         }

         catch ( NullPointerException e )

         {

             throw new UnsupportedCompilationException( "evaluation resulted in null expression." );

         }

         catch ( Throwable t )

         {

             throw OgnlOps.castToRuntime( t );

         }

         return result;

     }

     /* (non-Javadoc)

      * @see org.apache.commons.ognl.ExpressionNode#toSetSourceString(org.apache.commons.ognl.OgnlContext, java.lang.Object)

      */

     public String toSetSourceString( OgnlContext context, Object target )

     {

         if ( children.length != 2 )

         {

             throw new UnsupportedCompilationException( "Can only compile boolean expressions with two children." );

         }

         String pre = (String) context.get( "_currentChain" );

         if ( pre == null )

         {

             pre = "";

         }

         String result = "";

         try

         {

             if ( !OgnlOps.booleanValue( children[0].getValue( context, target ) ) )

             {

                 throw new UnsupportedCompilationException(

                     "And expression can't be compiled until all conditions are true." );

             }

             String first =

                 ExpressionCompiler.getRootExpression( children[0], context.getRoot(), context ) + pre

                     + children[0].toGetSourceString( context, target );

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

             String second =

                 ExpressionCompiler.getRootExpression( children[1], context.getRoot(), context ) + pre

                     + children[1].toSetSourceString( context, target );

             if ( !OgnlRuntime.isBoolean( first ) )

             {

                 result += "if(org.apache.commons.ognl.OgnlOps.booleanValue(" + first + ")){";

             }

             else

             {

                 result += "if(" + first + "){";

             }

             result += second;

             result += "; } ";

             context.setCurrentObject( target );

             context.setCurrentType( Object.class );

         }

         catch ( Throwable t )

         {

             throw OgnlOps.castToRuntime( t );

         }

         return result;

     }

     /* (non-Javadoc)

      * @see org.apache.commons.ognl.Node#accept(org.apache.commons.ognl.NodeVisitor, java.lang.Object)

      */

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

         throws OgnlException

     {

         return visitor.visit( this, data );

     }

 }