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package org.scijava.io;

import java.io.IOException;

import org.scijava.event.EventService;
import org.scijava.io.event.DataOpenedEvent;
import org.scijava.io.event.DataSavedEvent;
import org.scijava.log.LogService;
import org.scijava.plugin.AbstractHandlerService;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;
import org.scijava.service.Service;

/**
 * Default implementation of {@link IOService}.
 * 
 * @author Curtis Rueden
 */
@Plugin(type = Service.class)
public final class DefaultIOService
	extends AbstractHandlerService> implements IOService
{

	@Parameter
	private LogService log;

	@Parameter
	private EventService eventService;

	// -- IOService methods --

	@Override
	public Object open(final String source) throws IOException {
		final IOPlugin opener = getOpener(source);
		if (opener == null) return null; // no appropriate IOPlugin

		final Object data = opener.open(source);
		if (data == null) return null; // IOPlugin returned no data; canceled?

		eventService.publish(new DataOpenedEvent(source, data));
		return data;
	}

	@Override
	public void save(final Object data, final String destination)
		throws IOException
	{
		final IOPlugin