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
019import java.io.Serializable;
020import java.util.ArrayList;
021import 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 */
028public 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<Action> actions;
035
036    /**
037     * The parent container, for traceability.
038     */
039    private EnterableState parent;
040
041    /**
042     * Constructor.
043     */
044    public Executable() {
045        super();
046        this.actions = new ArrayList<Action>();
047    }
048
049    /**
050     * Get the executable actions contained in this Executable.
051     *
052     * @return Returns the actions.
053     */
054    public final List<Action> 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 EnterableState parent.
072     *
073     * @return Returns the parent.
074     */
075    public EnterableState getParent() {
076        return parent;
077    }
078
079    /**
080     * Set the EnterableState parent.
081     *
082     * @param parent The parent to set.
083     */
084    protected void setParent(final EnterableState parent) {
085        this.parent = parent;
086    }
087}
088