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1   /*
2    $Id: ArrayExpression.java,v 1.7 2004/07/10 03:31:37 bran 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)
40   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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.AsmClassGenerator2;
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: 1.7 $
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          // there is never primitive element in native groovy code
73          String boxedType = BytecodeHelper.getObjectTypeForPrimitive(type);
74          this.elementType = boxedType;
75          setSuperType(boxedType);
76          this.expressions = expressions;
77  
78          for (Iterator iter = expressions.iterator(); iter.hasNext();) {
79              Object item = iter.next();
80              if (!(item instanceof Expression)) {
81                  throw new ClassCastException("Item: " + item + " is not an Expression");
82              }
83          }
84      }
85  
86      private void setSuperType(String type) {
87          if (type == null) System.out.println("setSuperType: null");
88          if (type.endsWith("[]")) {
89          }
90          else {
91              type += "[]";
92          }
93          super.setType(type); //  array type. todo probably need to wait until ClassGen time to avoid resolve "this" type
94      }
95  
96      /***
97       * Creates an empty array of a certain size
98       */
99      public ArrayExpression(String type, Expression sizeExpression) {
100         String boxedType = BytecodeHelper.getObjectTypeForPrimitive(type);
101         this.elementType = boxedType;
102         setSuperType(boxedType);
103         this.sizeExpression = sizeExpression;
104         this.expressions = Collections.EMPTY_LIST;
105     }
106 
107     public void addExpression(Expression expression) {
108         expressions.add(expression);
109     }
110 
111     public List getExpressions() {
112         return expressions;
113     }
114 
115     public void visit(GroovyCodeVisitor visitor) {
116         visitor.visitArrayExpression(this);
117     }
118 
119     public boolean isDynamic() {
120         return false;
121     }
122 
123     public Expression transformExpression(ExpressionTransformer transformer) {
124         return new ArrayExpression(type, transformExpressions(expressions, transformer));
125     }
126 
127     public Expression getExpression(int i) {
128         Object object = expressions.get(i);
129         return (Expression) object;
130     }
131 
132     public String getElementType() {
133         if (BytecodeHelper.isPrimitiveType(elementType)) { 
134             return BytecodeHelper.getObjectTypeForPrimitive(elementType);
135         }
136         return elementType;
137     }
138     
139     public String getText() {
140         StringBuffer buffer = new StringBuffer("[");
141         boolean first = true;
142         for (Iterator iter = expressions.iterator(); iter.hasNext();) {
143             if (first) {
144                 first = false;
145             }
146             else {
147                 buffer.append(", ");
148             }
149 
150             buffer.append(((Expression) iter.next()).getText());
151         }
152         buffer.append("]");
153         return buffer.toString();
154     }
155 
156     public Expression getSizeExpression() {
157         return sizeExpression;
158     }
159 
160     public String toString() {
161         return super.toString() + expressions;
162     }
163 
164     protected void resolveType(AsmClassGenerator2 resolver) {
165         //
166     }
167 }