001 /* 002 $Id: MethodPointerExpression.java,v 1.5 2005/11/13 16:42:09 blackdrag Exp $ 003 004 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. 005 006 Redistribution and use of this software and associated documentation 007 ("Software"), with or without modification, are permitted provided 008 that the following conditions are met: 009 010 1. Redistributions of source code must retain copyright 011 statements and notices. Redistributions must also contain a 012 copy of this document. 013 014 2. Redistributions in binary form must reproduce the 015 above copyright notice, this list of conditions and the 016 following disclaimer in the documentation and/or other 017 materials provided with the distribution. 018 019 3. The name "groovy" must not be used to endorse or promote 020 products derived from this Software without prior written 021 permission of The Codehaus. For written permission, 022 please contact info@codehaus.org. 023 024 4. Products derived from this Software may not be called "groovy" 025 nor may "groovy" appear in their names without prior written 026 permission of The Codehaus. "groovy" is a registered 027 trademark of The Codehaus. 028 029 5. Due credit should be given to The Codehaus - 030 http://groovy.codehaus.org/ 031 032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS 033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 043 OF THE POSSIBILITY OF SUCH DAMAGE. 044 045 */ 046 package org.codehaus.groovy.ast.expr; 047 048 import groovy.lang.Closure; 049 050 import org.codehaus.groovy.ast.ClassHelper; 051 import org.codehaus.groovy.ast.ClassNode; 052 import org.codehaus.groovy.ast.GroovyCodeVisitor; 053 054 /** 055 * Represents a method pointer on an object such as 056 * foo.&bar which means find the method pointer on foo for the method called "bar" 057 * which is equivalent to 058 * <code> 059 * foo.metaClass.getMethodPointer(foo, "bar") 060 * 061 * @version $Revision: 1.5 $ 062 */ 063 public class MethodPointerExpression extends Expression { 064 065 private Expression expression; 066 private String methodName; 067 068 public MethodPointerExpression(Expression expression, String methodName) { 069 this.expression = expression; 070 this.methodName = methodName; 071 } 072 073 public Expression getExpression() { 074 if (expression == null) 075 return VariableExpression.THIS_EXPRESSION; 076 else 077 return expression; 078 } 079 080 public String getMethodName() { 081 return methodName; 082 } 083 084 public void visit(GroovyCodeVisitor visitor) { 085 visitor.visitMethodPointerExpression(this); 086 } 087 088 public Expression transformExpression(ExpressionTransformer transformer) { 089 if (expression == null) 090 return new MethodPointerExpression(VariableExpression.THIS_EXPRESSION, methodName); 091 else 092 return new MethodPointerExpression(transformer.transform(expression), methodName); 093 } 094 095 public String getText() { 096 if (expression == null) 097 return "&" + methodName; 098 else 099 return expression.getText() + ".&" + methodName; 100 } 101 102 public ClassNode getType() { 103 return ClassHelper.CLOSURE_TYPE; 104 } 105 106 public boolean isDynamic() { 107 return false; 108 } 109 110 public Class getTypeClass() { 111 return Closure.class; 112 } 113 }