001    /*
002     $Id: TupleExpression.java 4098 2006-10-10 16:09:48Z blackdrag $
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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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.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    
055    /**
056     * Represents a tuple expression {1, 2, 3} which creates an immutable List
057     * 
058     * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
059     * @version $Revision: 4098 $
060     */
061    public class TupleExpression extends Expression {
062        private List expressions;
063    
064        public TupleExpression() {
065            this(new ArrayList());
066        }
067        
068        public TupleExpression(List expressions) {
069            this.expressions = expressions;
070        }
071        
072        public TupleExpression(Expression[] expressionArray) {
073            this();
074            expressions.addAll(Arrays.asList(expressionArray));
075        }
076    
077        public TupleExpression addExpression(Expression expression) {
078            expressions.add(expression);
079            return this;
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            Expression ret = new TupleExpression(transformExpressions(getExpressions(), transformer)); 
092            ret.setSourcePosition(this);
093            return ret;
094        }
095    
096        public Expression getExpression(int i) {
097            return (Expression) expressions.get(i);
098        }
099    
100        public String getText() {
101            StringBuffer buffer = new StringBuffer("(");
102            boolean first = true;
103            for (Iterator iter = expressions.iterator(); iter.hasNext(); ) {
104                if (first) {
105                    first = false;
106                }
107                else {
108                    buffer.append(", ");
109                }
110                
111                buffer.append(((Expression)iter.next()).getText());
112            }
113            buffer.append(")");
114            return buffer.toString();
115        }
116    
117        public String toString() {
118            return super.toString() + expressions;
119        }
120    }