/*
 * Copyright 2005-2006 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */


package com.sun.xml.internal.xsom;

/**
 * Model group.
 *
 * @author
 *  Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
public interface XSModelGroup extends XSComponent, XSTerm, Iterable<XSParticle>
{
    /**
     * Type-safe enumeration for kind of model groups.
     * Constants are defined in the {@link XSModelGroup} interface.
     */
    public static enum Compositor {
        ALL("all"),CHOICE("choice"),SEQUENCE("sequence");

        private Compositor(String _value) {
            this.value = _value;
        }

        private final String value;
        /**
         * Returns the human-readable compositor name.
         *
         * @return
         *      Either "all", "sequence", or "choice".
         */
        public String toString() {
            return value;
        }
    }
    /**
     * A constant that represents "all" compositor.
     */
    static final Compositor ALL = Compositor.ALL;
    /**
     * A constant that represents "sequence" compositor.
     */
    static final Compositor SEQUENCE = Compositor.SEQUENCE;
    /**
     * A constant that represents "choice" compositor.
     */
    static final Compositor CHOICE = Compositor.CHOICE;

    Compositor getCompositor();

    /**
     * Gets <i>i</i>-ith child.
     */
    XSParticle getChild(int idx);
    /**
     * Gets the number of children.
     */
    int getSize();

    /**
     * Gets all the children in one array.
     */
    XSParticle[] getChildren();
}