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.ReadOnlyBooleanPropertyBase;
  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 ReadOnlyJavaBeanBooleanProperty} provides an adapter between a regular
  43  * read only Java Bean property of type {@code boolean} or {@code Boolean} and a JavaFX
  44  * {@code ReadOnlyBooleanProperty}. It cannot be created directly, but a
  45  * {@link ReadOnlyJavaBeanBooleanPropertyBuilder} 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 ReadOnlyJavaBeanBooleanProperty} 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.ReadOnlyBooleanProperty
  55  * @see ReadOnlyJavaBeanBooleanPropertyBuilder
  56  * @since JavaFX 2.1
  57  */
  58 public final class ReadOnlyJavaBeanBooleanProperty extends ReadOnlyBooleanPropertyBase implements ReadOnlyJavaBeanProperty<Boolean> {
  59 
  60     private final ReadOnlyPropertyDescriptor descriptor;
  61     private final ReadOnlyPropertyDescriptor.ReadOnlyListener<Boolean> listener;
  62 
  63     private final AccessControlContext acc = AccessController.getContext();
  64 
  65     ReadOnlyJavaBeanBooleanProperty(ReadOnlyPropertyDescriptor descriptor, Object bean) {
  66         this.descriptor = descriptor;
  67         this.listener = descriptor.new ReadOnlyListener<Boolean>(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 boolean get() {
  81         return AccessController.doPrivileged((PrivilegedAction<Boolean>) () -> {
  82             try {
  83                 return (Boolean)MethodUtil.invoke(descriptor.getGetter(), getBean(), (Object[])null);
  84             } catch (IllegalAccessException e) {
  85                 throw new UndeclaredThrowableException(e);
  86             } catch (InvocationTargetException e) {
  87                 throw new UndeclaredThrowableException(e);
  88             }
  89         }, acc);
  90     }
  91 
  92     /**
  93      * {@inheritDoc}
  94      */
  95     @Override
  96     public Object getBean() {
  97         return listener.getBean();
  98     }
  99 
 100     /**
 101      * {@inheritDoc}
 102      */
 103     @Override
 104     public String getName() {
 105         return descriptor.getName();
 106     }
 107 
 108     /**
 109      * {@inheritDoc}
 110      */
 111     @Override
 112     public void fireValueChangedEvent() {
 113         super.fireValueChangedEvent();
 114     }
 115 
 116     /**
 117      * {@inheritDoc}
 118      */
 119     @Override
 120     public void dispose() {
 121         descriptor.removeListener(listener);
 122     }
 123 }