001 /*
002 $Id: MethodPointerExpression.java 3419 2006-01-19 00:07:02Z blackdrag $
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: 3419 $
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 Expression ret;
090 if (expression == null) {
091 ret = new MethodPointerExpression(VariableExpression.THIS_EXPRESSION, methodName);
092 } else {
093 ret = new MethodPointerExpression(transformer.transform(expression), methodName);
094 }
095 ret.setSourcePosition(this);
096 return ret;
097 }
098
099 public String getText() {
100 if (expression == null) {
101 return "&" + methodName;
102 } else {
103 return expression.getText() + ".&" + methodName;
104 }
105 }
106
107 public ClassNode getType() {
108 return ClassHelper.CLOSURE_TYPE;
109 }
110
111 public boolean isDynamic() {
112 return false;
113 }
114
115 public Class getTypeClass() {
116 return Closure.class;
117 }
118 }