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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.
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 * 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.
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package org.scijava.module.process;

import org.scijava.Priority;
import org.scijava.module.Module;
import org.scijava.module.ModuleItem;
import org.scijava.module.ModuleService;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;

/**
 * A preprocessor for saving populated input values to persistent storage.
 * 
 * This preprocessor runs late in the chain, giving other preprocessors every
 * chance to populate the inputs first. In particular, it executes after the
 * {@link org.scijava.widget.InputHarvester} has run, so that user-specified
 * values are persisted for next time.
 * 
 * 
 * @author Curtis Rueden
 */
@Plugin(type = PreprocessorPlugin.class,
	priority = SaveInputsPreprocessor.PRIORITY)
public class SaveInputsPreprocessor extends AbstractPreprocessorPlugin {

	public static final double PRIORITY = Priority.VERY_LOW - 1;

	@Parameter
	private ModuleService moduleService;

	// -- ModuleProcessor methods --

	@Override
	public void process(final Module module) {
		final Iterable> inputs = module.getInfo().inputs();
		for (final ModuleItem item : inputs) {
			saveValue(module, item);
		}
	}

	// -- Helper methods --

	/** Saves the value of the given module item to persistent storage. */
	private  void saveValue(final Module module, final ModuleItem item) {
		final T value = item.getValue(module);
		moduleService.save(item, value);
	}

}