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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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* SciJava Common shared library for SciJava software.
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* Copyright (C) 2009 - 2017 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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* 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.io;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLDecoder;
import java.util.LinkedHashMap;
import java.util.Map;
import org.scijava.log.LogService;
import org.scijava.plugin.Parameter;
/**
* {@link Location} backed by a {@link URI} string.
*
* @author Curtis Rueden
*/
public class URILocation extends AbstractLocation {
@Parameter
private LogService log;
private final URI uri;
public URILocation(final URI uri) {
this.uri = uri;
}
public URILocation(final String uriPath) throws URISyntaxException {
this(new URI(uriPath));
}
// -- URILocation methods --
public Map getQueryMap() {
return decodeQuery(getURI().getRawQuery());
}
public String getQueryValue(final String key) {
return getQueryMap().get(key);
}
// FIXME: look up whether anyone has created a mutatable URI class,
// with individual setters for the various parts. Otherwise, we'll
// have to handle it here!
// -- Location methods --
@Override
public URI getURI() {
return uri;
}
// -- Helper methods --
/**
* Decodes a query string of ampersand-separated key/value pairs. E.g.:
* {@code apples=yummy&bananas=delicious&grapefruits=scrumptious}.
*
* @param query The query string to decode.
* @return A map of the decoded key/value pairs.
*/
private Map decodeQuery(final String query) {
final Map map = new LinkedHashMap<>();
if (query == null) return map;
for (final String param : query.split("&")) {
final int equals = param.indexOf("=");
if (equals < 0) {
map.put(decode(param), "true");
}
else {
final String key = decode(param.substring(0, equals));
final String value = decode(param.substring(equals + 1));
map.put(key, value);
}
}
return map;
}
/**
* Decodes a single uuencoded string.
*
* @see URLDecoder
*/
private String decode(final String s) {
// http://stackoverflow.com/a/6926987
try {
return URLDecoder.decode(s.replace("+", "%2B"), "UTF-8");
}
catch (UnsupportedEncodingException exc) {
return null;
}
}
}