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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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/*
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 * SciJava Common shared library for SciJava software.
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 * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
 * Institute of Molecular Cell Biology and Genetics.
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 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
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package org.scijava;

import org.scijava.util.ClassUtils;

/**
 * An object that can be sorted according to priority.
 * 
 * @author Curtis Rueden
 */
public interface Prioritized extends Comparable {

	/**
	 * Gets the sort priority of the object.
	 * 
	 * @see Priority
	 */
	double getPriority();

	/**
	 * Sets the sort priority of the object.
	 * 
	 * @see Priority
	 */
	void setPriority(double priority);

	// -- Comparable methods --

	@Override
	default int compareTo(final Prioritized that) {
		if (that == null) return 1;

		// compare priorities
		final int priorityCompare = Priority.compare(this, that);
		if (priorityCompare != 0) return priorityCompare;

		// compare classes
		return ClassUtils.compare(getClass(), that.getClass());
	}

}