001    /*
002     $Id: TupleExpression.java,v 1.4 2005/02/01 10:46:54 russel 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
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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.ArrayList;
049    import java.util.Arrays;
050    import java.util.Iterator;
051    import java.util.List;
052    
053    import org.codehaus.groovy.ast.GroovyCodeVisitor;
054    import org.codehaus.groovy.classgen.AsmClassGenerator;
055    
056    /**
057     * Represents a tuple expression {1, 2, 3} which creates an immutable List
058     * 
059     * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
060     * @version $Revision: 1.4 $
061     */
062    public class TupleExpression extends Expression {
063        private List expressions;
064    
065        public TupleExpression() {
066            this(new ArrayList());
067        }
068        
069        public TupleExpression(List expressions) {
070            this.expressions = expressions;
071        }
072        
073        public TupleExpression(Expression[] expressionArray) {
074            this();
075            expressions.addAll(Arrays.asList(expressionArray));
076        }
077    
078        public void addExpression(Expression expression) {
079            expressions.add(expression);
080        }
081        
082        public List getExpressions() {
083            return expressions;
084        }
085    
086        public void visit(GroovyCodeVisitor visitor) {
087            visitor.visitTupleExpression(this);
088        }
089    
090        public Expression transformExpression(ExpressionTransformer transformer) {
091            return new TupleExpression(transformExpressions(getExpressions(), transformer));
092        }
093    
094        protected void resolveType(AsmClassGenerator resolver) {
095            boolean failed = false;
096            for (int i = 0; i < expressions.size(); i++) {
097                Expression expression = (Expression) expressions.get(i);
098                expression.resolve(resolver);
099                if (expression.isResolveFailed())
100                    failed = true;
101            }
102            setResolveFailed(failed);
103        }
104    
105        public Expression getExpression(int i) {
106            return (Expression) expressions.get(i);
107        }
108    
109        public String getText() {
110            StringBuffer buffer = new StringBuffer("(");
111            boolean first = true;
112            for (Iterator iter = expressions.iterator(); iter.hasNext(); ) {
113                if (first) {
114                    first = false;
115                }
116                else {
117                    buffer.append(", ");
118                }
119                
120                buffer.append(((Expression)iter.next()).getText());
121            }
122            buffer.append(")");
123            return buffer.toString();
124        }
125    
126        public String toString() {
127            return super.toString() + expressions;
128        }
129    }