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,
069: String methodName) {
070: this .expression = expression;
071: this .methodName = methodName;
072: }
073:
074: public Expression getExpression() {
075: if (expression == null)
076: return VariableExpression.THIS_EXPRESSION;
077: else
078: return expression;
079: }
080:
081: public String getMethodName() {
082: return methodName;
083: }
084:
085: public void visit(GroovyCodeVisitor visitor) {
086: visitor.visitMethodPointerExpression(this );
087: }
088:
089: public Expression transformExpression(
090: ExpressionTransformer transformer) {
091: Expression ret;
092: if (expression == null) {
093: ret = new MethodPointerExpression(
094: VariableExpression.THIS_EXPRESSION, methodName);
095: } else {
096: ret = new MethodPointerExpression(transformer
097: .transform(expression), methodName);
098: }
099: ret.setSourcePosition(this );
100: return ret;
101: }
102:
103: public String getText() {
104: if (expression == null) {
105: return "&" + methodName;
106: } else {
107: return expression.getText() + ".&" + methodName;
108: }
109: }
110:
111: public ClassNode getType() {
112: return ClassHelper.CLOSURE_TYPE;
113: }
114:
115: public boolean isDynamic() {
116: return false;
117: }
118:
119: public Class getTypeClass() {
120: return Closure.class;
121: }
122: }
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