1/*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.xml.internal.xsom.impl;
27
28import com.sun.xml.internal.xsom.XSContentType;
29import com.sun.xml.internal.xsom.XSParticle;
30import com.sun.xml.internal.xsom.XSSimpleType;
31import com.sun.xml.internal.xsom.visitor.XSContentTypeFunction;
32import com.sun.xml.internal.xsom.visitor.XSContentTypeVisitor;
33import com.sun.xml.internal.xsom.visitor.XSFunction;
34import com.sun.xml.internal.xsom.visitor.XSVisitor;
35
36/**
37 *
38 * @author
39 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
40 */
41public class EmptyImpl extends ComponentImpl implements ContentTypeImpl {
42    public EmptyImpl() { super(null,null,null,null); }
43
44    public XSSimpleType asSimpleType()  { return null; }
45    public XSParticle asParticle()      { return null; }
46    public XSContentType asEmpty()      { return this; }
47
48    public Object apply( XSContentTypeFunction function ) {
49        return function.empty(this);
50    }
51    public Object apply( XSFunction function ) {
52        return function.empty(this);
53    }
54    public void visit( XSVisitor visitor ) {
55        visitor.empty(this);
56    }
57    public void visit( XSContentTypeVisitor visitor ) {
58        visitor.empty(this);
59    }
60
61    public XSContentType getContentType() { return this; }
62}
63