Исходный код

001/*
002 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.  Oracle designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Oracle in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
022 * or visit www.oracle.com if you need additional information or have any
023 * questions.
024 */
025package javafx.collections;
026
027import com.sun.javafx.collections.ArrayListenerHelper;
028import javafx.beans.InvalidationListener;
029
030/**
031 * Abstract class that serves as a base class for {@link ObservableArray} implementations.
032 * The base class provides listener handling functionality by implementing
033 * {@code addListener} and {@code removeListener} methods.
034 * {@link #fireChange(boolean, int, int) } method is provided
035 *      for notifying the listeners.
036 * @param <T> actual array instance type
037 * @see ObservableArray
038 * @see ArrayChangeListener
039 * @since 8.0
040 */
041public abstract class ObservableArrayBase<T extends ObservableArray<T>> implements ObservableArray<T> {
042    
043    private ArrayListenerHelper<T> listenerHelper;
044
045    @Override public final void addListener(InvalidationListener listener) {
046        listenerHelper = ArrayListenerHelper.<T>addListener(listenerHelper, (T) this, listener);
047    }
048
049    @Override public final void removeListener(InvalidationListener listener) {
050        listenerHelper = ArrayListenerHelper.removeListener(listenerHelper, listener);
051    }
052    
053    @Override public final void addListener(ArrayChangeListener<T> listener) {
054        listenerHelper = ArrayListenerHelper.<T>addListener(listenerHelper, (T) this, listener);
055    }
056
057    @Override public final void removeListener(ArrayChangeListener<T> listener) {
058        listenerHelper = ArrayListenerHelper.removeListener(listenerHelper, listener);
059    }
060    
061    /**
062     * Notifies all listeners of a change
063     * @param change
064     */
065    protected final void fireChange(boolean sizeChanged, int from, int to) {
066        ArrayListenerHelper.fireValueChangedEvent(listenerHelper, sizeChanged, from, to);
067    }    
068}