GuiExecutor.java

/*******************************************************************************
 * Copyright (c) 2016 Weasis Team and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Nicolas Roduit - initial API and implementation
 *******************************************************************************/
package org.weasis.core.api.gui.util;

import java.lang.reflect.InvocationTargetException;
import java.util.List;
import java.util.concurrent.AbstractExecutorService;
import java.util.concurrent.TimeUnit;

import javax.swing.SwingUtilities;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class GuiExecutor extends AbstractExecutorService {
    private static final Logger LOGGER = LoggerFactory.getLogger(GuiExecutor.class);

    private static final GuiExecutor instance = new GuiExecutor();

    private GuiExecutor() {
    }

    public static GuiExecutor instance() {
        return instance;
    }

    @Override
    public void execute(Runnable r) {
        if (SwingUtilities.isEventDispatchThread()) {
            r.run();
        } else {
            SwingUtilities.invokeLater(r);
        }
    }

    public void invokeAndWait(Runnable r) {
        if (SwingUtilities.isEventDispatchThread()) {
            r.run();
        } else {
            try {
                SwingUtilities.invokeAndWait(r);
            } catch (InterruptedException e) {
                LOGGER.warn("Interrupted Exception of {}", r); //$NON-NLS-1$
            } catch (InvocationTargetException e) {
                LOGGER.error("EDT invokeAndWait()", e); //$NON-NLS-1$
            }
        }
    }

    @Override
    public void shutdown() {
        throw new UnsupportedOperationException();
    }

    @Override
    public List<Runnable> shutdownNow() {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean isShutdown() {
        return false;
    }

    @Override
    public boolean isTerminated() {
        return false;
    }
}