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1 /*******************************************************************************
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2 * Copyright (c) 2006, 2007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *******************************************************************************/
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11
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12 module org.eclipse.core.databinding.observable.ObservableEvent;
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13
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14 import java.lang.all;
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15
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16 import java.util.EventObject;
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17
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18 /**
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19 * Abstract event object for events fired by {@link IObservable} objects. All
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20 * events fired by observables must be derived from this class so that the way
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21 * of dispatching events can be improved in later versions of the framework.
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22 *
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23 * @since 1.0
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24 *
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25 */
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26 public abstract class ObservableEvent : EventObject {
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27
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28 /**
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29 * Creates a new observable event.
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30 *
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31 * @param source
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32 */
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33 public this(IObservable source) {
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34 super(source);
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35 }
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36
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37 /**
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38 *
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39 */
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40 private static final long serialVersionUID = 7693906965267871813L;
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41
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42 /**
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43 * Returns the observable that generated this event.
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44 *
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45 * @return the observable that generated this event
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46 */
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47 public IObservable getObservable() {
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48 return cast(IObservable) getSource();
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49 }
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50
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51 /**
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52 * Dispatch this event to the given listener. Subclasses must implement this
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53 * method by calling the appropriate type-safe event handling method on the
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54 * given listener according to the type of this event.
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55 *
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56 * @param listener
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57 * the listener that should handle the event
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58 */
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59 protected abstract void dispatch(IObservablesListener listener);
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60
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61 /**
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62 * Returns a unique object used for distinguishing this event type from
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63 * others.
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64 *
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65 * @return a unique object representing the concrete type of this event.
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66 */
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67 protected abstract Object getListenerType();
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68
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69 }
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