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; | |
/** | |
*/ | |
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 (children[0] instanceof ExpressionNode) | |
{ | |
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 (children[1] instanceof ExpressionNode) | |
{ | |
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 (children[2] instanceof ExpressionNode) | |
{ | |
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 ); | |
} | |
} |