groovy-core/src/main/org/codehaus/groovy/ast/expr/TupleExpression.java

/*
 $Id$

 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.

 Redistribution and use of this software and associated documentation
 ("Software"), with or without modification, are permitted provided
 that the following conditions are met:

 1. Redistributions of source code must retain copyright
    statements and notices.  Redistributions must also contain a
    copy of this document.

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    above copyright notice, this list of conditions and the
    following disclaimer in the documentation and/or other
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    products derived from this Software without prior written
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    please contact info@codehaus.org.

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    http://groovy.codehaus.org/

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package org.codehaus.groovy.ast.expr;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;

import org.codehaus.groovy.ast.GroovyCodeVisitor;

/**
 * Represents a tuple expression {1, 2, 3} which creates an immutable List
 * 
 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
 * @version $Revision$
 */
public class TupleExpression extends Expression {
    private List expressions;

    public TupleExpression() {
        this(new ArrayList());
    }
    
    public TupleExpression(List expressions) {
        this.expressions = expressions;
    }
    
    public TupleExpression(Expression[] expressionArray) {
        this();
        expressions.addAll(Arrays.asList(expressionArray));
    }

    public TupleExpression addExpression(Expression expression) {
        expressions.add(expression);
        return this;
    }
    
    public List getExpressions() {
        return expressions;
    }

    public void visit(GroovyCodeVisitor visitor) {
        visitor.visitTupleExpression(this);
    }

    public Expression transformExpression(ExpressionTransformer transformer) {
        Expression ret = new TupleExpression(transformExpressions(getExpressions(), transformer)); 
        ret.setSourcePosition(this);
        return ret;
    }

    public Expression getExpression(int i) {
        return (Expression) expressions.get(i);
    }

    public String getText() {
        StringBuffer buffer = new StringBuffer("(");
        boolean first = true;
        for (Iterator iter = expressions.iterator(); iter.hasNext(); ) {
            if (first) {
                first = false;
            }
            else {
                buffer.append(", ");
            }
            
            buffer.append(((Expression)iter.next()).getText());
        }
        buffer.append(")");
        return buffer.toString();
    }

    public String toString() {
        return super.toString() + expressions;
    }
}