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/*
 * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.xsom;

/*-
 * #%L
 * XSOM
 * %%
 * Copyright (C) 2019 - 2020 Entur
 * %%
 * Licensed under the EUPL, Version 1.1 or – as soon they will be
 * approved by the European Commission - subsequent versions of the
 * EUPL (the "Licence");
 * 
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * 
 * http://ec.europa.eu/idabc/eupl5
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 * #L%
 */

/**
 * Model group.
 * 
 * @author
 *  Kohsuke Kawaguchi ([email protected])
 */
public interface XSModelGroup extends XSComponent, XSTerm, Iterable
{
    /**
     * 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-ith child.
     */
    XSParticle getChild(int idx);
    /**
     * Gets the number of children.
     */
    int getSize();

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