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1   /*
2    $Id: ArrayExpression.java,v 1.16 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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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: 1.16 $
61   */
62  public class ArrayExpression extends Expression {
63      private List expressions;
64      private List sizeExpression;
65  
66      private ClassNode elementType;
67      
68      private static ClassNode makeArray(ClassNode base, List sizeExpression) {
69      	ClassNode ret = base.makeArray();
70      	if (sizeExpression==null) return ret;
71      	int size = sizeExpression.size();
72      	for (int i=1; i<size; i++) {
73      		ret = ret.makeArray();
74      	}
75      	return ret;
76      }
77      
78      public ArrayExpression(ClassNode elementType, List expressions, List sizeExpression) {
79          //expect to get the elementType
80          super.setType(makeArray(elementType,sizeExpression));
81          if (expressions==null) expressions=Collections.EMPTY_LIST;
82          this.elementType = elementType;
83          this.expressions = expressions;
84          this.sizeExpression = sizeExpression;
85          
86          for (Iterator iter = expressions.iterator(); iter.hasNext();) {
87              Object item = iter.next();
88              if (item!=null && !(item instanceof Expression)) {
89                  throw new ClassCastException("Item: " + item + " is not an Expression");
90              }
91          }
92          if (sizeExpression!=null) {
93  	        for (Iterator iter = sizeExpression.iterator(); iter.hasNext();) {
94  	            Object item = iter.next();
95  	            if (!(item instanceof Expression)) {
96  	                throw new ClassCastException("Item: " + item + " is not an Expression");
97  	            }
98  	        }
99          }
100     }
101     
102     
103     /***
104      * Creates an array using an initializer expression
105      */
106     public ArrayExpression(ClassNode elementType, List expressions) {
107         this(elementType,expressions,null);
108     }
109 
110     public void addExpression(Expression expression) {
111         expressions.add(expression);
112     }
113 
114     public List getExpressions() {
115         return expressions;
116     }
117 
118     public void visit(GroovyCodeVisitor visitor) {
119         visitor.visitArrayExpression(this);
120     }
121 
122     public boolean isDynamic() {
123         return false;
124     }
125 
126     public Expression transformExpression(ExpressionTransformer transformer) {
127     	List exprList = transformExpressions(expressions, transformer);
128     	List sizes = null;
129     	if (sizeExpression!=null) sizes = transformExpressions(sizeExpression,transformer);
130         Expression ret = new ArrayExpression(elementType, exprList, sizes);
131         ret.setSourcePosition(this);
132         return ret;
133     }
134 
135     public Expression getExpression(int i) {
136         Object object = expressions.get(i);
137         return (Expression) object;
138     }
139 
140     public ClassNode getElementType() {
141         return elementType;
142     }
143     
144     public String getText() {
145         StringBuffer buffer = new StringBuffer("[");
146         boolean first = true;
147         for (Iterator iter = expressions.iterator(); iter.hasNext();) {
148             if (first) {
149                 first = false;
150             }
151             else {
152                 buffer.append(", ");
153             }
154 
155             buffer.append(((Expression) iter.next()).getText());
156         }
157         buffer.append("]");
158         return buffer.toString();
159     }
160 
161     public List getSizeExpression() {
162         return sizeExpression;
163     }
164 
165     public String toString() {
166         return super.toString() + expressions;
167     }
168 }