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1   /*
2    $Id: ListExpression.java,v 1.7 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
27      trademark of The Codehaus.
28  
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
36   THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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44  
45   */
46  package org.codehaus.groovy.ast.expr;
47  
48  import java.util.ArrayList;
49  import java.util.Iterator;
50  import java.util.List;
51  
52  import org.codehaus.groovy.ast.ClassHelper;
53  import org.codehaus.groovy.ast.GroovyCodeVisitor;
54  
55  /***
56   * Represents a list expression [1, 2, 3] which creates a mutable List
57   * 
58   * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
59   * @version $Revision: 1.7 $
60   */
61  public class ListExpression extends Expression {
62      private List expressions;
63  
64      public ListExpression() {
65          this(new ArrayList());
66      }
67      
68      public ListExpression(List expressions) {
69          this.expressions = expressions;
70          //TODO: get the type's of the expressions to specify the
71          // list type to List<X> if possible.
72          setType(ClassHelper.LIST_TYPE);
73      }
74      
75      public void addExpression(Expression expression) {
76          expressions.add(expression);
77      }
78      
79      public List getExpressions() {
80          return expressions;
81      }
82  
83      public void visit(GroovyCodeVisitor visitor) {
84          visitor.visitListExpression(this);
85      }
86  
87      public Expression transformExpression(ExpressionTransformer transformer) {
88          Expression ret = new ListExpression(transformExpressions(getExpressions(), transformer));
89          ret.setSourcePosition(this);
90          return ret;       
91      }
92  
93      public Expression getExpression(int i) {
94          return (Expression) expressions.get(i);
95      }
96  
97      public String getText() {
98          StringBuffer buffer = new StringBuffer("[");
99          boolean first = true;
100         for (Iterator iter = expressions.iterator(); iter.hasNext(); ) {
101             if (first) {
102                 first = false;
103             }
104             else {
105                 buffer.append(", ");
106             }
107             
108             buffer.append(((Expression)iter.next()).getText());
109         }
110         buffer.append("]");
111         return buffer.toString();
112     }
113 
114     public String toString() {
115         return super.toString() + expressions;
116     }
117 }