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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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;
import org.jruby.lexer.yacc.ISourcePositionHolder;

/**
 * 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;

	private final ISourcePositionHolder caseKeyword;
	private final ISourcePositionHolder end;

	public CaseNode(ISourcePosition position, Node caseNode, Node caseBody,
			ISourcePositionHolder caseKeyword, ISourcePositionHolder end) {
		super(position, NodeTypes.CASENODE);
		this.caseNode = caseNode;
		this.caseBody = caseBody;
		this.caseKeyword = caseKeyword;
		this.end = end;
	}

	/**
	 * 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);
	}

	/**
	 * @return the end
	 */
	public ISourcePositionHolder getEnd() {
		return end;
	}

	/**
	 * @return the caseKeyword
	 */
	public ISourcePositionHolder getCaseKeyword() {
		return caseKeyword;
	}

}