/*
 * Copyright (c) 1997, 2012, 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.
 *
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package com.sun.xml.internal.xsom;

import com.sun.xml.internal.xsom.visitor.XSContentTypeFunction;
import com.sun.xml.internal.xsom.visitor.XSContentTypeVisitor;

/**
 * Content of a complex type.
 *
 * @author
 *  Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
public interface XSContentType extends XSComponent
{
    /**
     * Equivalent of <code>(this instanceof XSSimpleType)?this:null</code>
     */
    XSSimpleType asSimpleType();
    /**
     * Equivalent of <code>(this instanceof XSParticle)?this:null</code>
     */
    XSParticle asParticle();
    /**
     * If this content type represents the empty content, return <code>this</code>,
     * otherwise null.
     */
    XSContentType asEmpty();

    <T> T apply( XSContentTypeFunction<T> function );
    void visit( XSContentTypeVisitor visitor );
}