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1   /*
2    $Id: ArrayExpression.java,v 1.14 2005/11/13 16:42:09 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.ClassNode;
53  import org.codehaus.groovy.ast.GroovyCodeVisitor;
54  
55  /***
56   * Represents an array object construction either using a fixed size
57   * or an initializer expression
58   * 
59   * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
60   * @version $Revision: 1.14 $
61   */
62  public class ArrayExpression extends Expression {
63      private List expressions;
64      private Expression sizeExpression;
65  
66      private ClassNode elementType;
67      
68      private ArrayExpression(ClassNode elementType, List expressions, Expression sizeExpression) {
69          //expect to get the elementType
70          super.setType(elementType.makeArray());
71          this.elementType = elementType;
72          this.expressions = expressions;
73          this.sizeExpression = sizeExpression;
74          
75          for (Iterator iter = expressions.iterator(); iter.hasNext();) {
76              Object item = iter.next();
77              if (!(item instanceof Expression)) {
78                  throw new ClassCastException("Item: " + item + " is not an Expression");
79              }
80          }
81      }
82      
83      
84      /***
85       * Creates an array using an initializer expression
86       */
87      public ArrayExpression(ClassNode elementType, List expressions) {
88          this(elementType,expressions,null);
89      }
90  
91      /***
92       * Creates an empty array of a certain size
93       */
94      public ArrayExpression(ClassNode elementType, Expression sizeExpression) {
95          this(elementType,Collections.EMPTY_LIST,sizeExpression);
96      }
97  
98      public void addExpression(Expression expression) {
99          expressions.add(expression);
100     }
101 
102     public List getExpressions() {
103         return expressions;
104     }
105 
106     public void visit(GroovyCodeVisitor visitor) {
107         visitor.visitArrayExpression(this);
108     }
109 
110     public boolean isDynamic() {
111         return false;
112     }
113 
114     public Expression transformExpression(ExpressionTransformer transformer) {
115         return new ArrayExpression(elementType, transformExpressions(expressions, transformer), transformer.transform(sizeExpression));
116     }
117 
118     public Expression getExpression(int i) {
119         Object object = expressions.get(i);
120         return (Expression) object;
121     }
122 
123     public ClassNode getElementType() {
124         return elementType;
125     }
126     
127     public String getText() {
128         StringBuffer buffer = new StringBuffer("[");
129         boolean first = true;
130         for (Iterator iter = expressions.iterator(); iter.hasNext();) {
131             if (first) {
132                 first = false;
133             }
134             else {
135                 buffer.append(", ");
136             }
137 
138             buffer.append(((Expression) iter.next()).getText());
139         }
140         buffer.append("]");
141         return buffer.toString();
142     }
143 
144     public Expression getSizeExpression() {
145         return sizeExpression;
146     }
147 
148     public String toString() {
149         return super.toString() + expressions;
150     }
151 }