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46 package org.codehaus.groovy.ast.expr;
47
48 import groovy.lang.Closure;
49
50 import org.codehaus.groovy.ast.ClassHelper;
51 import org.codehaus.groovy.ast.ClassNode;
52 import org.codehaus.groovy.ast.GroovyCodeVisitor;
53
54 /***
55 * Represents a method pointer on an object such as
56 * foo.&bar which means find the method pointer on foo for the method called "bar"
57 * which is equivalent to
58 * <code>
59 * foo.metaClass.getMethodPointer(foo, "bar")
60 *
61 * @version $Revision: 1.6 $
62 */
63 public class MethodPointerExpression extends Expression {
64
65 private Expression expression;
66 private String methodName;
67
68 public MethodPointerExpression(Expression expression, String methodName) {
69 this.expression = expression;
70 this.methodName = methodName;
71 }
72
73 public Expression getExpression() {
74 if (expression == null)
75 return VariableExpression.THIS_EXPRESSION;
76 else
77 return expression;
78 }
79
80 public String getMethodName() {
81 return methodName;
82 }
83
84 public void visit(GroovyCodeVisitor visitor) {
85 visitor.visitMethodPointerExpression(this);
86 }
87
88 public Expression transformExpression(ExpressionTransformer transformer) {
89 Expression ret;
90 if (expression == null) {
91 ret = new MethodPointerExpression(VariableExpression.THIS_EXPRESSION, methodName);
92 } else {
93 ret = new MethodPointerExpression(transformer.transform(expression), methodName);
94 }
95 ret.setSourcePosition(this);
96 return ret;
97 }
98
99 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 }