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/*
* Copyright (c) 2018, Red Hat, Inc.
* Copyright (c) 2018, 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package org.GNOME.Accessibility;
import javax.swing.*;
import java.util.concurrent.*;
/**
* AtkUtil:
* That class is used to wrap the callback on Java object
* to avoid the concurrency of AWT objects.
* @autor Giuseppe Capaldo
*/
public class AtkUtil{
/**
* invokeInSwing:
* Invoked when we need to make an asynchronous callback on
* a Java object and this callback has a return value.
* this method doesn't launch any exception because in case
* of problems it prints a warning and returns the default
* value that is passed to it
*
* @param function A Callable object that return T value
* @param d A T object tha is returned if an exception occurs
* @return The return value of the original function or the
* default value. Obviously if the value is a primitive type
* this will automatically wrapped from java in the
* corresponding object
*/
public static <T> T invokeInSwing (Callable <T> function, T d){
if (SwingUtilities.isEventDispatchThread()) {
// We are already running in the EDT, we can call it directly
try {
return function.call();
} catch (Exception ex) {
ex.printStackTrace(); // we can do better than this
return d;
}
}
RunnableFuture<T> wf = new FutureTask<>(function);
SwingUtilities.invokeLater(wf);
try {
return wf.get();
} catch (InterruptedException|ExecutionException ex) {
ex.printStackTrace(); // we can do better than this
return d;
}
}
/**
* invokeInSwing:
* Invoked when we need to make an asynchronous callback on
* some Java object and this callback hasn't a return value.
*
* @param function A Runnable object that doesn't return some value
*/
public static void invokeInSwing (Runnable function){
if (SwingUtilities.isEventDispatchThread()) {
// We are already running in the EDT, we can call it directly
function.run();
return;
}
SwingUtilities.invokeLater(function);
}
}
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