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     */
017    package org.apache.commons.scxml.model;
018    
019    import java.io.Serializable;
020    import java.util.ArrayList;
021    import java.util.List;
022    
023    /**
024     * An abstract base class for containers of executable elements in SCXML,
025     * such as <onentry> and <onexit>.
026     *
027     */
028    public abstract class Executable implements Serializable {
029    
030        /**
031         * The set of executable elements (those that inheriting from
032         * Action) that are contained in this Executable.
033         */
034        private List actions;
035    
036        /**
037         * The parent container, for traceability.
038         */
039        private TransitionTarget parent;
040    
041        /**
042         * Constructor.
043         */
044        public Executable() {
045            super();
046            this.actions = new ArrayList();
047        }
048    
049        /**
050         * Get the executable actions contained in this Executable.
051         *
052         * @return Returns the actions.
053         */
054        public final List getActions() {
055            return actions;
056        }
057    
058        /**
059         * Add an Action to the list of executable actions contained in
060         * this Executable.
061         *
062         * @param action The action to add.
063         */
064        public final void addAction(final Action action) {
065            if (action != null) {
066                this.actions.add(action);
067            }
068        }
069    
070        /**
071         * Get the TransitionTarget parent.
072         *
073         * @return Returns the parent.
074         */
075        public final TransitionTarget getParent() {
076            return parent;
077        }
078    
079        /**
080         * Set the TransitionTarget parent.
081         *
082         * @param parent The parent to set.
083         */
084        public final void setParent(final TransitionTarget parent) {
085            this.parent = parent;
086        }
087    
088    }
089