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1   /*
2    $Id: ArrayExpression.java,v 1.10 2005/02/07 11:20:12 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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42   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43   OF THE POSSIBILITY OF SUCH DAMAGE.
44  
45   */
46  package org.codehaus.groovy.ast.expr;
47  
48  import java.util.Collections;
49  import java.util.Iterator;
50  import java.util.List;
51  
52  import org.codehaus.groovy.ast.GroovyCodeVisitor;
53  import org.codehaus.groovy.classgen.BytecodeHelper;
54  import org.codehaus.groovy.classgen.AsmClassGenerator;
55  
56  /***
57   * Represents an array object construction either using a fixed size
58   * or an initializer expression
59   * 
60   * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
61   * @version $Revision: 1.10 $
62   */
63  public class ArrayExpression extends Expression {
64      private List expressions;
65      private Expression sizeExpression;
66  
67      private String elementType;
68      /***
69       * Creates an array using an initializer expression
70       */
71      public ArrayExpression(String type, List expressions) {
72          if (!type.endsWith("[]")) type += "[]";
73          setSuperType(type);
74          this.elementType = type;
75          this.expressions = expressions;
76  
77          for (Iterator iter = expressions.iterator(); iter.hasNext();) {
78              Object item = iter.next();
79              if (!(item instanceof Expression)) {
80                  throw new ClassCastException("Item: " + item + " is not an Expression");
81              }
82          }
83      }
84  
85      private void setSuperType(String type) {
86          if (type == null) System.out.println("setSuperType: null");
87          if (type.endsWith("[]")) {
88          }
89          else {
90              type += "[]";
91          }
92          super.setType(type); //  array type. todo probably need to wait until ClassGen time to avoid resolve "this" type
93      }
94  
95      /***
96       * Creates an empty array of a certain size
97       */
98      public ArrayExpression(String type, Expression sizeExpression) {
99          if (!type.endsWith("[]")) type += "[]";
100         this.elementType = type;        
101         this.sizeExpression = sizeExpression;
102         this.expressions = Collections.EMPTY_LIST;
103     }
104 
105     public void addExpression(Expression expression) {
106         expressions.add(expression);
107     }
108 
109     public List getExpressions() {
110         return expressions;
111     }
112 
113     public void visit(GroovyCodeVisitor visitor) {
114         visitor.visitArrayExpression(this);
115     }
116 
117     public boolean isDynamic() {
118         return false;
119     }
120 
121     public Expression transformExpression(ExpressionTransformer transformer) {
122         return new ArrayExpression(type, transformExpressions(expressions, transformer));
123     }
124 
125     public Expression getExpression(int i) {
126         Object object = expressions.get(i);
127         return (Expression) object;
128     }
129 
130     public String getElementType() {
131         return elementType;
132     }
133     
134     public String getText() {
135         StringBuffer buffer = new StringBuffer("[");
136         boolean first = true;
137         for (Iterator iter = expressions.iterator(); iter.hasNext();) {
138             if (first) {
139                 first = false;
140             }
141             else {
142                 buffer.append(", ");
143             }
144 
145             buffer.append(((Expression) iter.next()).getText());
146         }
147         buffer.append("]");
148         return buffer.toString();
149     }
150 
151     public Expression getSizeExpression() {
152         return sizeExpression;
153     }
154 
155     public String toString() {
156         return super.toString() + expressions;
157     }
158 
159     protected void resolveType(AsmClassGenerator resolver) {
160         //
161     }
162 }