HashNode.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>
 * 
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 * 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 Literal Hash. this can represent either a {a=&b, c=&d} type
 * expression or the list of default values in a method call.
 * 
 * @author jpetersen
 */
public class HashNode extends Node {
	static final long serialVersionUID = -7554050553303344025L;

	private final ListNode listNode;
	private final ISourcePositionHolder leftBrace;
	private final ISourcePositionHolder rightBrace;

	public HashNode(ISourcePosition position, ListNode listNode) {
		this(position, listNode, null, null);
	}

	public HashNode(ISourcePosition position, ListNode listNode,
			ISourcePositionHolder leftBrace, ISourcePositionHolder rightBrace) {
		super(position, NodeTypes.HASHNODE);
		this.listNode = listNode;
		this.leftBrace = leftBrace;
		this.rightBrace = rightBrace;
	}

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

	/**
	 * Gets the listNode.
	 * 
	 * @return Returns a IListNode
	 */
	public ListNode getListNode() {
		return listNode;
	}

	public List childNodes() {
		return createList(listNode);
	}

	/**
	 * @return the leftBrace
	 */
	public ISourcePositionHolder getLeftBrace() {
		return leftBrace;
	}

	/**
	 * @return the rightBrace
	 */
	public ISourcePositionHolder getRightBrace() {
		return rightBrace;
	}

}