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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
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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package org.scijava.run.console;

import java.lang.reflect.InvocationTargetException;
import java.util.LinkedList;

import org.scijava.console.AbstractConsoleArgument;
import org.scijava.console.ConsoleArgument;
import org.scijava.log.LogService;
import org.scijava.parse.Items;
import org.scijava.parse.ParseService;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;
import org.scijava.run.RunService;
import org.scijava.startup.StartupService;

/**
 * Handles the {@code --run} command line argument.
 *
 * @author Curtis Rueden
 */
@Plugin(type = ConsoleArgument.class)
public class RunArgument extends AbstractConsoleArgument {

	@Parameter
	private RunService runService;

	@Parameter
	private StartupService startupService;

	@Parameter
	private ParseService parser;

	@Parameter
	private LogService log;

	// -- Constructor --

	public RunArgument() {
		super(2, "--run");
	}

	// -- ConsoleArgument methods --

	@Override
	public void handle(final LinkedList args) {
		if (!supports(args)) return;

		args.removeFirst(); // --run
		final String code = args.removeFirst();
		final String arg = getParam(args);
		if (arg != null) args.removeFirst(); // argument list was given

		startupService.addOperation(() -> {
			try {
				if (arg == null) runService.run(code);
				else {
					final Items items = parser.parse(arg);
					if (items.isMap()) runService.run(code, items.asMap());
					else if (items.isList()) runService.run(code, items.toArray());
					else {
						throw new IllegalArgumentException("Arguments are inconsistent. " +
							"Please pass either a list of key/value pairs, " +
							"or a list of values.");
					}
				}
			}
			catch (final InvocationTargetException exc) {
				throw new RuntimeException(exc);
			}
		});
	}

	// -- Typed methods --

	@Override
	public boolean supports(final LinkedList args) {
		if (!super.supports(args)) return false;
		return runService.supports(args.get(1));
	}

}