001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.scxml2.model;
018
019/**
020 * The class in this SCXML object model that corresponds to the
021 * <parallel> SCXML element, which is a wrapper element to
022 * encapsulate parallel state machines. For the <parallel> element
023 * to be useful, each of its <state> substates must itself be
024 * complex, that is, one with either <state> or <parallel>
025 * children.
026 *
027 */
028public class Parallel extends TransitionalState {
029
030    /**
031     * Serial version UID.
032     */
033    private static final long serialVersionUID = 2L;
034
035    /**
036     * Constructor.
037     */
038    public Parallel() {
039    }
040
041    /**
042     * {@inheritDoc}
043     * @return Returns always false (a state of type Parallel is never atomic)
044     */
045    public final boolean isAtomicState() {
046        return false;
047    }
048    /**
049     * Add a TransitionalState (State or Parallel) child
050     * @param ts the child to add
051     */
052    public final void addChild(final TransitionalState ts) {
053        super.addChild(ts);
054    }
055}
056