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 /** 023 * $Id: ASTInstanceof.java 1194869 2011-10-29 11:10:16Z mcucchiara $ 024 * @author Luke Blanshard (blanshlu@netscape.net) 025 * @author Drew Davidson (drew@ognl.org) 026 */ 027 public class ASTInstanceof 028 extends SimpleNode 029 implements NodeType 030 { 031 private String targetType; 032 033 public ASTInstanceof( int id ) 034 { 035 super( id ); 036 } 037 038 public ASTInstanceof( OgnlParser p, int id ) 039 { 040 super( p, id ); 041 } 042 043 void setTargetType( String targetType ) 044 { 045 this.targetType = targetType; 046 } 047 048 String getTargetType() 049 { 050 return targetType; 051 } 052 053 protected Object getValueBody( OgnlContext context, Object source ) 054 throws OgnlException 055 { 056 Object value = children[0].getValue( context, source ); 057 return OgnlRuntime.isInstance( context, value, targetType ) ? Boolean.TRUE : Boolean.FALSE; 058 } 059 060 public Class getGetterClass() 061 { 062 return boolean.class; 063 } 064 065 public Class getSetterClass() 066 { 067 return null; 068 } 069 070 public String toGetSourceString( OgnlContext context, Object target ) 071 { 072 try 073 { 074 075 String ret = ""; 076 077 if ( ASTConst.class.isInstance( children[0] ) ) 078 { 079 ret = ( (Boolean) getValueBody( context, target ) ).toString(); 080 } 081 else 082 { 083 ret = children[0].toGetSourceString( context, target ) + " instanceof " + targetType; 084 } 085 context.setCurrentType( Boolean.TYPE ); 086 087 return ret; 088 089 } 090 catch ( Throwable t ) 091 { 092 throw OgnlOps.castToRuntime( t ); 093 } 094 } 095 096 public String toSetSourceString( OgnlContext context, Object target ) 097 { 098 return toGetSourceString( context, target ); 099 } 100 101 public <R, P> R accept( NodeVisitor<? extends R, ? super P> visitor, P data ) 102 throws OgnlException 103 { 104 return visitor.visit( this, data ); 105 } 106 }