/*
 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */


package com.sun.xml.internal.xsom.impl;

import com.sun.xml.internal.xsom.XSContentType;
import com.sun.xml.internal.xsom.XSParticle;
import com.sun.xml.internal.xsom.XSSimpleType;
import com.sun.xml.internal.xsom.visitor.XSContentTypeFunction;
import com.sun.xml.internal.xsom.visitor.XSContentTypeVisitor;
import com.sun.xml.internal.xsom.visitor.XSFunction;
import com.sun.xml.internal.xsom.visitor.XSVisitor;

/**
 * 
 * @author
 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
public class EmptyImpl extends ComponentImpl implements ContentTypeImpl {
    public EmptyImpl() { super(null,null,null,null); }
    
    public XSSimpleType asSimpleType()  { return null; }
    public XSParticle asParticle()      { return null; }
    public XSContentType asEmpty()      { return this; }
    
    public Object apply( XSContentTypeFunction function ) {
        return function.empty(this);
    }
    public Object apply( XSFunction function ) {
        return function.empty(this);
    }
    public void visit( XSVisitor visitor ) {
        visitor.empty(this);
    }
    public void visit( XSContentTypeVisitor visitor ) {
        visitor.empty(this);
    }
    
    public XSContentType getContentType() { return this; }
}