plugins/org.eclipse.gymnast.generator.core/src/org/eclipse/gymnast/generator/core/ast/OptSubSeq.java

/*******************************************************************************
 * Copyright (c) 2004, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.gymnast.generator.core.ast;

import org.eclipse.gymnast.runtime.core.ast.ASTNode;

import antlr.Token;


/**
 *
 * @generated by Gymnast from gymnast.ast on Aug 15, 2004 2:28:15 PM
 */
public class OptSubSeq extends Expr  {


	private GymnastTokenNode _lparen;
	private Seq _seq;
	private GymnastTokenNode _rparen;
	private GymnastTokenNode _qmark;

	public GymnastTokenNode getLparen() {
		return _lparen;
	}
	public Seq getSeq() {
		return _seq;
	}
	public GymnastTokenNode getRparen() {
		return _rparen;
	}
	public GymnastTokenNode getQmark() {
		return _qmark;
	}


	/**
	 * @return the number of children of this ASTNode
	 */
	public int getChildCount() {
		int count = 0;
		if (_lparen != null) count++;
		if (_seq != null) count++;
		if (_rparen != null) count++;
		if (_qmark != null) count++;

		return count;
	}

	/**
	 * @param index the index of a child ASTNode to get
	 * @return the child ASTNode at the given index
	 * @throws IndexOutOfBoundsException when the index is out of bounds
	 */
	public ASTNode getChild(int index) {
		int count = -1;
		if ((_lparen != null) && (++count == index)) return _lparen;
		if ((_seq != null) && (++count == index)) return _seq;
		if ((_rparen != null) && (++count == index)) return _rparen;
		if ((_qmark != null) && (++count == index)) return _qmark;

		throw new IndexOutOfBoundsException();
	}
	
	/**
	 * Construct a new OptSubSeq.
	 */
	public OptSubSeq(
		Token lparen,
		Seq seq,
		Token rparen,
		Token qmark
	) {
		super();

		if (lparen != null) {
			_lparen = new GymnastTokenNode(lparen);
			if (_lparen._parent != null) throw new RuntimeException();
			_lparen._parent = this;
		}
		if (seq != null) {
			_seq = seq;
			if (_seq._parent != null) throw new RuntimeException();
			_seq._parent = this;
		}
		if (rparen != null) {
			_rparen = new GymnastTokenNode(rparen);
			if (_rparen._parent != null) throw new RuntimeException();
			_rparen._parent = this;
		}
		if (qmark != null) {
			_qmark = new GymnastTokenNode(qmark);
			if (_qmark._parent != null) throw new RuntimeException();
			_qmark._parent = this;
		}

	}

	/**
	 * This method overrides the superclass <code>acceptImpl</code> providing
	 * the same implementation.  Here <code>this</code> refers to this specific node
	 * class, so the <code>beginVisit</code> and <code>endVisit</code> methods
	 * specific to this type in the visitor will be invoked.
	 */
	public void acceptImpl(GymnastASTNodeVisitor visitor) {
		boolean visitChildren = visitor.beginVisit(this);
		if (visitChildren) visitChildren(visitor);
		visitor.endVisit(this);
	}

}