1 /* 2 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package javafx.beans.property.adapter; 27 28 import com.sun.javafx.property.adapter.Disposer; 29 import com.sun.javafx.property.adapter.ReadOnlyPropertyDescriptor; 30 import javafx.beans.property.ReadOnlyLongPropertyBase; 31 32 import java.lang.reflect.InvocationTargetException; 33 import java.lang.reflect.UndeclaredThrowableException; 34 35 import java.security.AccessController; 36 import java.security.AccessControlContext; 37 import java.security.PrivilegedAction; 38 39 import sun.reflect.misc.MethodUtil; 40 41 /** 42 * A {@code ReadOnlyJavaBeanLongProperty} provides an adapter between a regular 43 * read only Java Bean property of type {@code long} or {@code Long} and a JavaFX 44 * {@code ReadOnlyLongProperty}. It cannot be created directly, but a 45 * {@link ReadOnlyJavaBeanLongPropertyBuilder} has to be used. 46 * <p> 47 * As a minimum, the Java Bean must implement a getter for the 48 * property. If the getter of an instance of this class is called, the property of 49 * the Java Bean is returned. If the Java Bean property is bound (i.e. it supports 50 * PropertyChangeListeners), this {@code ReadOnlyJavaBeanLongProperty} will be 51 * aware of changes in the Java Bean. Otherwise it can be notified about 52 * changes by calling {@link #fireValueChangedEvent()}. 53 * 54 * @see javafx.beans.property.ReadOnlyLongProperty 55 * @see ReadOnlyJavaBeanLongPropertyBuilder 56 * @since JavaFX 2.1 57 */ 58 public final class ReadOnlyJavaBeanLongProperty extends ReadOnlyLongPropertyBase implements ReadOnlyJavaBeanProperty<Number> { 59 60 private final ReadOnlyPropertyDescriptor descriptor; 61 private final ReadOnlyPropertyDescriptor.ReadOnlyListener<Number> listener; 62 63 private final AccessControlContext acc = AccessController.getContext(); 64 65 ReadOnlyJavaBeanLongProperty(ReadOnlyPropertyDescriptor descriptor, Object bean) { 66 this.descriptor = descriptor; 67 this.listener = descriptor.new ReadOnlyListener<Number>(bean, this); 68 descriptor.addListener(listener); 69 Disposer.addRecord(this, new DescriptorListenerCleaner(descriptor, listener)); 70 } 71 72 /** 73 * {@inheritDoc} 74 * 75 * @throws UndeclaredThrowableException if calling the getter of the Java Bean 76 * property throws an {@code IllegalAccessException} or an 77 * {@code InvocationTargetException}. 78 */ 79 @Override 80 public long get() { 81 return AccessController.doPrivileged((PrivilegedAction<Long>) () -> { 82 try { 83 return ((Number)MethodUtil.invoke( 84 descriptor.getGetter(), getBean(), (Object[])null)).longValue(); 85 } catch (IllegalAccessException e) { 86 throw new UndeclaredThrowableException(e); 87 } catch (InvocationTargetException e) { 88 throw new UndeclaredThrowableException(e); 89 } 90 }, acc); 91 } 92 93 /** 94 * {@inheritDoc} 95 */ 96 @Override 97 public Object getBean() { 98 return listener.getBean(); 99 } 100 101 /** 102 * {@inheritDoc} 103 */ 104 @Override 105 public String getName() { 106 return descriptor.getName(); 107 } 108 109 /** 110 * {@inheritDoc} 111 */ 112 @Override 113 public void fireValueChangedEvent() { 114 super.fireValueChangedEvent(); 115 } 116 117 /** 118 * {@inheritDoc} 119 */ 120 @Override 121 public void dispose() { 122 descriptor.removeListener(listener); 123 } 124 }