001    /*
002     $Id: ArrayExpression.java,v 1.12 2005/06/10 09:55:29 cstein 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.GroovyCodeVisitor;
053    import org.codehaus.groovy.classgen.AsmClassGenerator;
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: 1.12 $
061     */
062    public class ArrayExpression extends Expression {
063        private List expressions;
064        private Expression sizeExpression;
065    
066        private String elementType;
067        /**
068         * Creates an array using an initializer expression
069         */
070        public ArrayExpression(String type, List expressions) {
071            if (!type.endsWith("[]")) type += "[]";
072            setSuperType(type);
073            this.elementType = type;
074            this.expressions = expressions;
075    
076            for (Iterator iter = expressions.iterator(); iter.hasNext();) {
077                Object item = iter.next();
078                if (!(item instanceof Expression)) {
079                    throw new ClassCastException("Item: " + item + " is not an Expression");
080                }
081            }
082        }
083    
084        private void setSuperType(String type) {
085            if (type == null) System.out.println("setSuperType: null");
086            if (type.endsWith("[]")) {
087            }
088            else {
089                type += "[]";
090            }
091            super.setType(type); //  array type. todo probably need to wait until ClassGen time to avoid resolve "this" type
092        }
093    
094        /**
095         * Creates an empty array of a certain size
096         */
097        public ArrayExpression(String type, Expression sizeExpression) {
098            if (!type.endsWith("[]")) type += "[]";
099            setSuperType(type);
100            this.elementType = type;        
101            this.sizeExpression = sizeExpression;
102            this.expressions = Collections.EMPTY_LIST;
103        }
104    
105        public void addExpression(Expression expression) {
106            expressions.add(expression);
107        }
108    
109        public List getExpressions() {
110            return expressions;
111        }
112    
113        public void visit(GroovyCodeVisitor visitor) {
114            visitor.visitArrayExpression(this);
115        }
116    
117        public boolean isDynamic() {
118            return false;
119        }
120    
121        public Expression transformExpression(ExpressionTransformer transformer) {
122            return new ArrayExpression(type, transformExpressions(expressions, transformer));
123        }
124    
125        public Expression getExpression(int i) {
126            Object object = expressions.get(i);
127            return (Expression) object;
128        }
129    
130        public String getElementType() {
131            return elementType;
132        }
133        
134        public String getText() {
135            StringBuffer buffer = new StringBuffer("[");
136            boolean first = true;
137            for (Iterator iter = expressions.iterator(); iter.hasNext();) {
138                if (first) {
139                    first = false;
140                }
141                else {
142                    buffer.append(", ");
143                }
144    
145                buffer.append(((Expression) iter.next()).getText());
146            }
147            buffer.append("]");
148            return buffer.toString();
149        }
150    
151        public Expression getSizeExpression() {
152            return sizeExpression;
153        }
154    
155        public String toString() {
156            return super.toString() + expressions;
157        }
158    
159        protected void resolveType(AsmClassGenerator resolver) {
160            //
161        }
162    }