1 /* 2 * Copyright (c) 2011, 2017, 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.MethodHelper; 29 import com.sun.javafx.property.adapter.Disposer; 30 import com.sun.javafx.property.adapter.ReadOnlyPropertyDescriptor; 31 import javafx.beans.property.ReadOnlyIntegerPropertyBase; 32 33 import java.lang.reflect.InvocationTargetException; 34 import java.lang.reflect.UndeclaredThrowableException; 35 36 import java.security.AccessController; 37 import java.security.AccessControlContext; 38 import java.security.PrivilegedAction; 39 40 /** 41 * A {@code ReadOnlyJavaBeanIntegerProperty} provides an adapter between a regular 42 * read only Java Bean property of type {@code int} or {@code Integer} and a JavaFX 43 * {@code ReadOnlyIntegerProperty}. It cannot be created directly, but a 44 * {@link ReadOnlyJavaBeanIntegerPropertyBuilder} has to be used. 45 * <p> 46 * As a minimum, the Java Bean class must implement a getter for the 47 * property. If the getter of an instance of this class is called, the property of 48 * the Java Bean is returned. If the Java Bean property is bound (i.e. it supports 49 * PropertyChangeListeners), this {@code ReadOnlyJavaBeanIntegerProperty} will be 50 * aware of changes in the Java Bean. Otherwise it can be notified about 51 * changes by calling {@link #fireValueChangedEvent()}. 52 * </p> 53 * <p> 54 * The Java Bean class must be declared public. If that class is in a named 55 * module, then the module must {@link Module#isOpen(String,Module) open} 56 * the containing package to at least the {@code javafx.base} module 57 * (or {@link Module#isExported(String) export} the containing package 58 * unconditionally). 59 * </p> 60 * 61 * @see javafx.beans.property.ReadOnlyIntegerProperty 62 * @see ReadOnlyJavaBeanIntegerPropertyBuilder 63 * @since JavaFX 2.1 64 */ 65 public final class ReadOnlyJavaBeanIntegerProperty extends ReadOnlyIntegerPropertyBase implements ReadOnlyJavaBeanProperty<Number> { 66 67 private final ReadOnlyPropertyDescriptor descriptor; 68 private final ReadOnlyPropertyDescriptor.ReadOnlyListener<Number> listener; 69 70 private final AccessControlContext acc = AccessController.getContext(); 71 72 ReadOnlyJavaBeanIntegerProperty(ReadOnlyPropertyDescriptor descriptor, Object bean) { 73 this.descriptor = descriptor; 74 this.listener = descriptor.new ReadOnlyListener<Number>(bean, this); 75 descriptor.addListener(listener); 76 Disposer.addRecord(this, new DescriptorListenerCleaner(descriptor, listener)); 77 } 78 79 /** 80 * {@inheritDoc} 81 * 82 * @throws UndeclaredThrowableException if calling the getter of the Java Bean 83 * property throws an {@code IllegalAccessException} or an 84 * {@code InvocationTargetException}. 85 */ 86 @Override 87 public int get() { 88 return AccessController.doPrivileged((PrivilegedAction<Integer>) () -> { 89 try { 90 return ((Number)MethodHelper.invoke( 91 descriptor.getGetter(), getBean(), (Object[])null)).intValue(); 92 } catch (IllegalAccessException e) { 93 throw new UndeclaredThrowableException(e); 94 } catch (InvocationTargetException e) { 95 throw new UndeclaredThrowableException(e); 96 } 97 }, acc); 98 } 99 100 /** 101 * {@inheritDoc} 102 */ 103 @Override 104 public Object getBean() { 105 return listener.getBean(); 106 } 107 108 /** 109 * {@inheritDoc} 110 */ 111 @Override 112 public String getName() { 113 return descriptor.getName(); 114 } 115 116 /** 117 * {@inheritDoc} 118 */ 119 @Override 120 public void fireValueChangedEvent() { 121 super.fireValueChangedEvent(); 122 } 123 124 /** 125 * {@inheritDoc} 126 */ 127 @Override 128 public void dispose() { 129 descriptor.removeListener(listener); 130 } 131 }