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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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 * 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.
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package org.scijava.module;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;

/**
 * Abstract superclass of {@link Module} implementations.
 * 

* By default, input and output values are stored in {@link HashMap}s. *

* * @author Curtis Rueden */ public abstract class AbstractModule implements Module { private final HashMap inputs; private final HashMap outputs; /** Table indicating resolved inputs. */ private final HashSet resolvedInputs; private MethodRef initializerRef; public AbstractModule() { inputs = new HashMap<>(); outputs = new HashMap<>(); resolvedInputs = new HashSet<>(); } // -- Module methods -- @Override public void preview() { // do nothing by default } @Override public void cancel() { // do nothing by default } @Override public void initialize() throws MethodCallException { // execute global module initializer final Object delegateObject = getDelegateObject(); if (initializerRef == null) { final String initializer = getInfo().getInitializer(); initializerRef = new MethodRef(delegateObject.getClass(), initializer); } initializerRef.execute(delegateObject); // execute individual module item initializers for (final ModuleItem item : getInfo().inputs()) { item.initialize(this); } } @Override public Object getDelegateObject() { return this; } @Override public Object getInput(final String name) { return inputs.get(name); } @Override public Object getOutput(final String name) { return outputs.get(name); } @Override public Map getInputs() { return createMap(getInfo().inputs(), false); } @Override public Map getOutputs() { return createMap(getInfo().outputs(), true); } @Override public void setInput(final String name, final Object value) { inputs.put(name, value); } @Override public void setOutput(final String name, final Object value) { outputs.put(name, value); } @Override public void setInputs(final Map inputs) { for (final String name : inputs.keySet()) { setInput(name, inputs.get(name)); } } @Override public void setOutputs(final Map outputs) { for (final String name : outputs.keySet()) { setOutput(name, outputs.get(name)); } } @Override public boolean isResolved(final String name) { return resolvedInputs.contains(name); } @Override public void setResolved(final String name, final boolean resolved) { if (resolved) resolvedInputs.add(name); else resolvedInputs.remove(name); } // -- Helper methods -- private Map createMap(final Iterable> items, final boolean outputMap) { final Map map = new HashMap<>(); for (final ModuleItem item : items) { final String name = item.getName(); final Object value = outputMap ? getOutput(name) : getInput(name); map.put(name, value); } return map; } }




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