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/*
 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package javafx.beans.property.adapter;

import com.sun.javafx.property.adapter.ReadOnlyPropertyDescriptor;
import javafx.beans.property.ReadOnlyDoublePropertyBase;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.UndeclaredThrowableException;
import sun.misc.Cleaner;

import java.security.AccessController;
import java.security.AccessControlContext;
import java.security.PrivilegedAction;

import sun.reflect.misc.MethodUtil;

/**
 * A {@code ReadOnlyJavaBeanDoubleProperty} provides an adapter between a regular
 * read only Java Bean property of type {@code double} or {@code Double} and a JavaFX 
 * {@code ReadOnlyDoubleProperty}. It cannot be created directly, but a 
 * {@link ReadOnlyJavaBeanDoublePropertyBuilder} has to be used.
 * 

* As a minimum, the Java Bean must implement a getter for the * property. If the getter of an instance of this class is called, the property of * the Java Bean is returned. If the Java Bean property is bound (i.e. it supports * PropertyChangeListeners), this {@code ReadOnlyJavaBeanDoubleProperty} will be * aware of changes in the Java Bean. Otherwise it can be notified about * changes by calling {@link #fireValueChangedEvent()}. * * @see javafx.beans.property.ReadOnlyDoubleProperty * @see ReadOnlyJavaBeanDoublePropertyBuilder * @since JavaFX 2.1 */ public final class ReadOnlyJavaBeanDoubleProperty extends ReadOnlyDoublePropertyBase implements ReadOnlyJavaBeanProperty { private final ReadOnlyPropertyDescriptor descriptor; private final ReadOnlyPropertyDescriptor.ReadOnlyListener listener; private final AccessControlContext acc = AccessController.getContext(); ReadOnlyJavaBeanDoubleProperty(ReadOnlyPropertyDescriptor descriptor, Object bean) { this.descriptor = descriptor; this.listener = descriptor.new ReadOnlyListener(bean, this); descriptor.addListener(listener); Cleaner.create(this, new Runnable() { @Override public void run() { ReadOnlyJavaBeanDoubleProperty.this.descriptor.removeListener(listener); } }); } /** * {@inheritDoc} * * @throws UndeclaredThrowableException if calling the getter of the Java Bean * property throws an {@code IllegalAccessException} or an * {@code InvocationTargetException}. */ @Override public double get() { return AccessController.doPrivileged(new PrivilegedAction() { public Double run() { try { return ((Number)MethodUtil.invoke( descriptor.getGetter(), getBean(), (Object[])null)).doubleValue(); } catch (IllegalAccessException e) { throw new UndeclaredThrowableException(e); } catch (InvocationTargetException e) { throw new UndeclaredThrowableException(e); } } }, acc); } /** * {@inheritDoc} */ @Override public Object getBean() { return listener.getBean(); } /** * {@inheritDoc} */ @Override public String getName() { return descriptor.getName(); } /** * {@inheritDoc} */ @Override public void fireValueChangedEvent() { super.fireValueChangedEvent(); } /** * {@inheritDoc} */ @Override public void dispose() { descriptor.removeListener(listener); } }





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