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. 48 * The class, as well as the getter method, must be declared public. 49 * If the getter of an instance of this class is called, the property of 50 * the Java Bean is returned. If the Java Bean property is bound (i.e. it supports 51 * PropertyChangeListeners), this {@code ReadOnlyJavaBeanIntegerProperty} will be 52 * aware of changes in the Java Bean. Otherwise it can be notified about 53 * changes by calling {@link #fireValueChangedEvent()}. 54 * </p> 55 * <p><b>Deploying an Application as a Module</b></p> 56 * <p> 57 * If the Java Bean class is in a named module, then it must be reflectively 58 * accessible to the {@code javafx.base} module. 59 * A class is reflectively accessible if the module 60 * {@link Module#isOpen(String,Module) opens} the containing package to at 61 * least the {@code javafx.base} module. 62 * </p> 63 * <p> 64 * For example, if {@code com.foo.MyBeanClass} is in the {@code foo.app} module, 65 * the {@code module-info.java} might 66 * look like this: 67 * </p> 68 * 69 <pre>{@code module foo.app { 70 opens com.foo to javafx.base; 71 }}</pre> 72 * 73 * <p> 74 * Alternatively, a class is reflectively accessible if the module 75 * {@link Module#isExported(String) exports} the containing package 76 * unconditionally. 77 * </p> 78 * 79 * @see javafx.beans.property.ReadOnlyIntegerProperty 80 * @see ReadOnlyJavaBeanIntegerPropertyBuilder 81 * @since JavaFX 2.1 82 */ 83 public final class ReadOnlyJavaBeanIntegerProperty extends ReadOnlyIntegerPropertyBase implements ReadOnlyJavaBeanProperty<Number> { 84 85 private final ReadOnlyPropertyDescriptor descriptor; 86 private final ReadOnlyPropertyDescriptor.ReadOnlyListener<Number> listener; 87 88 private final AccessControlContext acc = AccessController.getContext(); 89 90 ReadOnlyJavaBeanIntegerProperty(ReadOnlyPropertyDescriptor descriptor, Object bean) { 91 this.descriptor = descriptor; 92 this.listener = descriptor.new ReadOnlyListener<Number>(bean, this); 93 descriptor.addListener(listener); 94 Disposer.addRecord(this, new DescriptorListenerCleaner(descriptor, listener)); 95 } 96 97 /** 98 * {@inheritDoc} 99 * 100 * @throws UndeclaredThrowableException if calling the getter of the Java Bean 101 * property throws an {@code IllegalAccessException} or an 102 * {@code InvocationTargetException}. 103 */ 104 @Override 105 public int get() { 106 return AccessController.doPrivileged((PrivilegedAction<Integer>) () -> { 107 try { 108 return ((Number)MethodHelper.invoke( 109 descriptor.getGetter(), getBean(), (Object[])null)).intValue(); 110 } catch (IllegalAccessException e) { 111 throw new UndeclaredThrowableException(e); 112 } catch (InvocationTargetException e) { 113 throw new UndeclaredThrowableException(e); 114 } 115 }, acc); 116 } 117 118 /** 119 * {@inheritDoc} 120 */ 121 @Override 122 public Object getBean() { 123 return listener.getBean(); 124 } 125 126 /** 127 * {@inheritDoc} 128 */ 129 @Override 130 public String getName() { 131 return descriptor.getName(); 132 } 133 134 /** 135 * {@inheritDoc} 136 */ 137 @Override 138 public void fireValueChangedEvent() { 139 super.fireValueChangedEvent(); 140 } 141 142 /** 143 * {@inheritDoc} 144 */ 145 @Override 146 public void dispose() { 147 descriptor.removeListener(listener); 148 } 149 }