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SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by downstream projects in the SciJava ecosystem, such as ImageJ and SCIFIO.

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/*
 * #%L
 * SciJava Common shared library for SciJava software.
 * %%
 * Copyright (C) 2009 - 2017 Board of Regents of the University of
 * Wisconsin-Madison, Broad Institute of MIT and Harvard, Max Planck
 * Institute of Molecular Cell Biology and Genetics, University of
 * Konstanz, and KNIME GmbH.
 * %%
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * #L%
 */

package org.scijava.app;

import org.scijava.app.event.StatusEvent;
import org.scijava.event.EventService;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;
import org.scijava.service.AbstractService;
import org.scijava.service.Service;

/**
 * Default service for status notifications.
 * 
 * @author Curtis Rueden
 */
@Plugin(type = Service.class)
public class DefaultStatusService extends AbstractService implements
	StatusService
{

	@Parameter
	private EventService eventService;

	@Parameter
	private AppService appService;

	// -- StatusService methods --

	@Override
	public void showProgress(final int value, final int maximum) {
		publish(new StatusEvent(value, maximum));
	}

	@Override
	public void showStatus(final String message) {
		publish(new StatusEvent(message));
	}

	@Override
	public void showStatus(final int progress, final int maximum,
		final String message)
	{
		publish(new StatusEvent(progress, maximum, message));
	}

	@Override
	public void warn(final String message) {
		publish(new StatusEvent(message, true));
	}

	@Override
	public void showStatus(final int progress, final int maximum,
		final String message, final boolean warn)
	{
		publish(new StatusEvent(progress, maximum, message, warn));
	}

	@Override
	public void clearStatus() {
		publish(new StatusEvent(""));
	}

	@Override
	public String getStatusMessage(final String appName,
		final StatusEvent statusEvent)
	{
		final String message = statusEvent.getStatusMessage();
		if (!"".equals(message)) return message;
		return appService.getApp(appName).getInfo(false);
	}
	
	/**
	 * Publish the status event to the event service.
	 * The default behavior is to publish status asynchronously.
	 * You can change this behavior by overriding this method
	 * in a derived class.
	 * 
	 * @param statusEvent the event to send to status listeners.
	 */
	protected void publish(final StatusEvent statusEvent)
	{
		eventService.publishLater(statusEvent);
	}

}




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