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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.plugin;

import java.lang.annotation.Target;

import org.scijava.MenuEntry;
import org.scijava.input.Accelerator;

/**
 * One item of a {@link Plugin}'s menu path. It can be a top-level menu such as
 * File, a nested menu such as Open Recent, or a leaf item such as Exit. A
 * sequential list of Menus defines a {@link Plugin}'s position in the menu
 * structure.
 * 
 * Using a list of Menus to define menu position is more verbose than using
 * {@link Plugin#menuPath}, but more powerful in that it allows specification of
 * various menu attributes (e.g., {@link #weight}, {@link #mnemonic},
 * {@link #accelerator} and {@link #iconPath}).
 * 
 * @author Curtis Rueden
 */
@Target({})
public @interface Menu {

	/** The human-readable label to use for the menu item. */
	String label();

	/**
	 * Position within the menu structure. Items at each level are sorted in
	 * ascending order by weight.
	 */
	double weight() default MenuEntry.DEFAULT_WEIGHT;

	/** Mnemonic identifying underlined shortcut character. */
	char mnemonic() default '\0';

	/**
	 * Keyboard shortcut to activate the menu item.
	 * 
	 * @see Accelerator#create(String) for information on the syntax.
	 */
	String accelerator() default "";

	/** Path to the menu's icon (shown in the menu structure). */
	String iconPath() default "";

}