001    /*
002     $Id: ArrayExpression.java,v 1.14 2005/11/13 16:42:09 blackdrag Exp $
003    
004     Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005    
006     Redistribution and use of this software and associated documentation
007     ("Software"), with or without modification, are permitted provided
008     that the following conditions are met:
009    
010     1. Redistributions of source code must retain copyright
011        statements and notices.  Redistributions must also contain a
012        copy of this document.
013    
014     2. Redistributions in binary form must reproduce the
015        above copyright notice, this list of conditions and the
016        following disclaimer in the documentation and/or other
017        materials provided with the distribution.
018    
019     3. The name "groovy" must not be used to endorse or promote
020        products derived from this Software without prior written
021        permission of The Codehaus.  For written permission,
022        please contact info@codehaus.org.
023    
024     4. Products derived from this Software may not be called "groovy"
025        nor may "groovy" appear in their names without prior written
026        permission of The Codehaus. "groovy" is a registered
027        trademark of The Codehaus.
028    
029     5. Due credit should be given to The Codehaus -
030        http://groovy.codehaus.org/
031    
032     THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033     ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034     NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
036     THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043     OF THE POSSIBILITY OF SUCH DAMAGE.
044    
045     */
046    package org.codehaus.groovy.ast.expr;
047    
048    import java.util.Collections;
049    import java.util.Iterator;
050    import java.util.List;
051    
052    import org.codehaus.groovy.ast.ClassNode;
053    import org.codehaus.groovy.ast.GroovyCodeVisitor;
054    
055    /**
056     * Represents an array object construction either using a fixed size
057     * or an initializer expression
058     * 
059     * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
060     * @version $Revision: 1.14 $
061     */
062    public class ArrayExpression extends Expression {
063        private List expressions;
064        private Expression sizeExpression;
065    
066        private ClassNode elementType;
067        
068        private ArrayExpression(ClassNode elementType, List expressions, Expression sizeExpression) {
069            //expect to get the elementType
070            super.setType(elementType.makeArray());
071            this.elementType = elementType;
072            this.expressions = expressions;
073            this.sizeExpression = sizeExpression;
074            
075            for (Iterator iter = expressions.iterator(); iter.hasNext();) {
076                Object item = iter.next();
077                if (!(item instanceof Expression)) {
078                    throw new ClassCastException("Item: " + item + " is not an Expression");
079                }
080            }
081        }
082        
083        
084        /**
085         * Creates an array using an initializer expression
086         */
087        public ArrayExpression(ClassNode elementType, List expressions) {
088            this(elementType,expressions,null);
089        }
090    
091        /**
092         * Creates an empty array of a certain size
093         */
094        public ArrayExpression(ClassNode elementType, Expression sizeExpression) {
095            this(elementType,Collections.EMPTY_LIST,sizeExpression);
096        }
097    
098        public void addExpression(Expression expression) {
099            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    }