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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 - 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.
 * %%
 * 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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 */

package org.scijava.script;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;

import org.scijava.module.Module;
import org.scijava.plugin.Plugin;
import org.scijava.plugin.RichPlugin;
import org.scijava.plugin.SingletonPlugin;

/**
 * The base interface for scripting language adapters.
 * 
 * Every SciJava scripting language implements this interface, which is based on
 * JSR
 * 223, Scripting for the Java Platform, included in Java 6 and later in the
 * {@link javax.script} package. This {@link ScriptLanguage} interface extends
 * {@link ScriptEngineFactory}, meaning it can act as a JSR 223 Java scripting
 * language, while also providing additional functionality necessary for full
 * support within applications such as ImageJ. In particular, this interface
 * adds API for code generation of scripts to replicate SciJava {@link Module}
 * executions (i.e., for "script recording" of SciJava commands).
 * 
 * 
 * Script languages discoverable at runtime must implement this interface and be
 * annotated with @{@link Plugin} with attribute {@link Plugin#type()} =
 * {@link ScriptLanguage}.class. While it possible to create a scripting
 * language adapter merely by implementing this interface, it is encouraged to
 * instead extend {@link AbstractScriptLanguage}, for convenience.
 * 
 * 
 * @author Johannes Schindelin
 */
public interface ScriptLanguage extends ScriptEngineFactory, RichPlugin,
	SingletonPlugin
{

	/** True iff this language requires a compilation step. */
	boolean isCompiledLanguage();

	/**
	 * Performs any necessary conversion of an encoded object retrieved from the
	 * language's script engine.
	 * 
	 * @see ScriptEngine#get(String)
	 */
	Object decode(Object object);

}