CaseNode.java

/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
 * Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
 * Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
 * Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
 * 
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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 * the provisions above, a recipient may use your version of this file under
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package org.jruby.ast;

import java.util.List;

import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.evaluator.Instruction;
import org.jruby.lexer.yacc.ISourcePosition;

/**
 * A Case statement.
 * 
 * Represents a complete case statement, including the body with its
 * when statements.
 * 
 * @author  jpetersen
 */
public class CaseNode extends Node {
    static final long serialVersionUID = -2824917272720800901L;

	/**
	 * the case expression.
	 **/
    private final Node caseNode;
	/**
	 * the body of the case.
	 */
    private final Node caseBody;
    
    public CaseNode(ISourcePosition position, Node caseNode, Node caseBody) {
        super(position, NodeTypes.CASENODE);
        this.caseNode = caseNode;
        this.caseBody = caseBody;
    }

 	/**
     * Accept for the visitor pattern.
     * @param iVisitor the visitor
     **/
    public Instruction accept(NodeVisitor iVisitor) {
        return iVisitor.visitCaseNode(this);
    }

    /**
     * Gets the caseNode.
	 * caseNode is the case expression 
     * @return caseNode
     */
    public Node getCaseNode() {
        return caseNode;
    }

    /**
     * Gets the first whenNode.
	 * the body of the case statement, the first of a list of WhenNodes
     * @return whenNode
     */
    public Node getFirstWhenNode() {
        return caseBody;
    }
    
    public List childNodes() {
        return Node.createList(caseNode, caseBody);
    }

}