/*
 * #%L
 * SciJava Common shared library for SciJava software.
 * %%
 * Copyright (C) 2009 - 2026 SciJava developers.
 * %%
 * 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
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 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 */

package org.scijava.app;

import java.util.List;
import java.util.Map;

import org.scijava.plugin.SingletonService;
import org.scijava.service.SciJavaService;

/**
 * Interface for application-level functionality.
 * 
 * @author Curtis Rueden
 */
public interface AppService extends SingletonService<App>, SciJavaService {

	/** Gets the foremost application (the one with the highest priority). */
	default App getApp() {
		final List<App> appList = getInstances();
		if (appList == null || appList.isEmpty()) return null;
		return appList.get(0);
	}

	/** Gets an application by name. */
	App getApp(final String name);

	/**
	 * Gets the table of associated applications, keyed by name.
	 * 
	 * @see org.scijava.plugin.Plugin#name()
	 */
	Map<String, App> getApps();

	// -- SingletonService methods --

	@Override
	default Class<App> getPluginType() {
		return App.class;
	}
}
