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1   /*
2    $Id: TupleExpression.java,v 1.6 2006/01/19 00:06:51 blackdrag Exp $
3   
4    Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
5   
6    Redistribution and use of this software and associated documentation
7    ("Software"), with or without modification, are permitted provided
8    that the following conditions are met:
9   
10   1. Redistributions of source code must retain copyright
11      statements and notices.  Redistributions must also contain a
12      copy of this document.
13  
14   2. Redistributions in binary form must reproduce the
15      above copyright notice, this list of conditions and the
16      following disclaimer in the documentation and/or other
17      materials provided with the distribution.
18  
19   3. The name "groovy" must not be used to endorse or promote
20      products derived from this Software without prior written
21      permission of The Codehaus.  For written permission,
22      please contact info@codehaus.org.
23  
24   4. Products derived from this Software may not be called "groovy"
25      nor may "groovy" appear in their names without prior written
26      permission of The Codehaus. "groovy" is a registered
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29   5. Due credit should be given to The Codehaus -
30      http://groovy.codehaus.org/
31  
32   THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
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45   */
46  package org.codehaus.groovy.ast.expr;
47  
48  import java.util.ArrayList;
49  import java.util.Arrays;
50  import java.util.Iterator;
51  import java.util.List;
52  
53  import org.codehaus.groovy.ast.GroovyCodeVisitor;
54  
55  /***
56   * Represents a tuple expression {1, 2, 3} which creates an immutable List
57   * 
58   * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
59   * @version $Revision: 1.6 $
60   */
61  public class TupleExpression extends Expression {
62      private List expressions;
63  
64      public TupleExpression() {
65          this(new ArrayList());
66      }
67      
68      public TupleExpression(List expressions) {
69          this.expressions = expressions;
70      }
71      
72      public TupleExpression(Expression[] expressionArray) {
73          this();
74          expressions.addAll(Arrays.asList(expressionArray));
75      }
76  
77      public void addExpression(Expression expression) {
78          expressions.add(expression);
79      }
80      
81      public List getExpressions() {
82          return expressions;
83      }
84  
85      public void visit(GroovyCodeVisitor visitor) {
86          visitor.visitTupleExpression(this);
87      }
88  
89      public Expression transformExpression(ExpressionTransformer transformer) {
90          Expression ret = new TupleExpression(transformExpressions(getExpressions(), transformer)); 
91          ret.setSourcePosition(this);
92          return ret;
93      }
94  
95      public Expression getExpression(int i) {
96          return (Expression) expressions.get(i);
97      }
98  
99      public String getText() {
100         StringBuffer buffer = new StringBuffer("(");
101         boolean first = true;
102         for (Iterator iter = expressions.iterator(); iter.hasNext(); ) {
103             if (first) {
104                 first = false;
105             }
106             else {
107                 buffer.append(", ");
108             }
109             
110             buffer.append(((Expression)iter.next()).getText());
111         }
112         buffer.append(")");
113         return buffer.toString();
114     }
115 
116     public String toString() {
117         return super.toString() + expressions;
118     }
119 }