/*
 * #%L
 * SciJava Common shared library for SciJava software.
 * %%
 * Copyright (C) 2009 - 2016 Board of Regents of the University of
 * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
 * Institute of Molecular Cell Biology and Genetics.
 * %%
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 *    this list of conditions and the following disclaimer.
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 */

package org.scijava.plugin;

import org.scijava.Typed;

/**
 * A service for managing a particular sort of {@link TypedPlugin}.
 * <p>
 * Note that like {@link PTService}, {@link SingletonService} and
 * {@link WrapperService}, {@code TypedService} is not a service interface
 * defining API for a specific concrete service implementation, but rather a
 * more general layer in a type hierarchy intended to ease creation of services
 * that fit its pattern.
 * </p>
 * 
 * @author Curtis Rueden
 * @param <DT> Base data type of the {@link TypedPlugin}s.
 * @param <PT> Plugin type of the {@link TypedPlugin}s.
 * @see TypedPlugin
 * @see PTService
 */
public interface TypedService<DT, PT extends TypedPlugin<DT>> extends
	PTService<PT>, Typed<DT>
{

	/**
	 * Gets a new instance of the highest priority plugin managed by this service
	 * which supports the given data object according to the {@link Typed}
	 * interface.
	 * <p>
	 * Note that this newly created plugin instance will <em>not</em> actually be
	 * injected with the given data object!
	 * </p>
	 * 
	 * @see HandlerService#getHandler(Object)
	 * @see WrapperService#create(Object)
	 */
	default PT find(final DT data) {
		for (final PluginInfo<PT> plugin : getPlugins()) {
			final PT instance = pluginService().createInstance(plugin);
			if (instance != null && instance.supports(data)) return instance;
		}
		return null;
	}
}
