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