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1   /*
2    $Id: ArrayExpression.java,v 1.11 2005/03/14 20:14:29 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
39   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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41   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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: 1.11 $
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         setSuperType(type);
101         this.elementType = type;        
102         this.sizeExpression = sizeExpression;
103         this.expressions = Collections.EMPTY_LIST;
104     }
105 
106     public void addExpression(Expression expression) {
107         expressions.add(expression);
108     }
109 
110     public List getExpressions() {
111         return expressions;
112     }
113 
114     public void visit(GroovyCodeVisitor visitor) {
115         visitor.visitArrayExpression(this);
116     }
117 
118     public boolean isDynamic() {
119         return false;
120     }
121 
122     public Expression transformExpression(ExpressionTransformer transformer) {
123         return new ArrayExpression(type, transformExpressions(expressions, transformer));
124     }
125 
126     public Expression getExpression(int i) {
127         Object object = expressions.get(i);
128         return (Expression) object;
129     }
130 
131     public String getElementType() {
132         return elementType;
133     }
134     
135     public String getText() {
136         StringBuffer buffer = new StringBuffer("[");
137         boolean first = true;
138         for (Iterator iter = expressions.iterator(); iter.hasNext();) {
139             if (first) {
140                 first = false;
141             }
142             else {
143                 buffer.append(", ");
144             }
145 
146             buffer.append(((Expression) iter.next()).getText());
147         }
148         buffer.append("]");
149         return buffer.toString();
150     }
151 
152     public Expression getSizeExpression() {
153         return sizeExpression;
154     }
155 
156     public String toString() {
157         return super.toString() + expressions;
158     }
159 
160     protected void resolveType(AsmClassGenerator resolver) {
161         //
162     }
163 }