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AnnotationCombiner.java
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AnnotationCombiner.java
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/*
* #%L
* SciJava Common shared library for SciJava software.
* %%
* Copyright (C) 2009 - 2014 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
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* #L%
*/
package org.scijava.annotations;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;
import org.scijava.util.Combiner;
import org.scijava.util.FileUtils;
/**
* Combines annotation indexes from all JAR files on the classpath.
*
* @author Curtis Rueden
*/
public class AnnotationCombiner extends AbstractIndexWriter implements Combiner
{
private static final String PREFIX = "META-INF/json/";
private static final String LEGACY_PREFIX = "META-INF/annotations/";
/** Reads in annotations from all available resources and combines them. */
@Override
public void combine(File outputDirectory) throws Exception {
if (outputDirectory == null) {
outputDirectory = new File("src/main/assembly/all");
}
final Set<String> annotationFiles = getAnnotationFiles();
final ClassLoader loader = Thread.currentThread().getContextClassLoader();
log("");
log("Writing annotations to " + outputDirectory.getAbsolutePath());
new File(outputDirectory, PREFIX).mkdirs();
for (final String annotationFile : annotationFiles) {
final String annotationName = annotationFile.substring(PREFIX.length());
@SuppressWarnings("unchecked")
final Class<? extends Annotation> annotation =
(Class<? extends Annotation>) loader.loadClass(annotationName);
for (IndexItem<? extends Annotation> item : Index
.load(annotation, loader))
{
add(adapt(item.annotation()), annotationName, item.className());
}
}
write(new AnnotationStreamFactory(outputDirectory));
}
/** Scans for annotations files in every resource on the classpath. */
public Set<String> getAnnotationFiles() throws IOException {
final HashSet<String> files = new HashSet<String>();
for (final String prefix : new String[] { PREFIX, LEGACY_PREFIX }) {
final Enumeration<URL> directories =
Thread.currentThread().getContextClassLoader().getResources(prefix);
while (directories.hasMoreElements()) {
final URL url = directories.nextElement();
for (final URL annotationIndexURL : FileUtils.listContents(url)) {
String string = annotationIndexURL.toString();
if (string.endsWith("/")) {
continue;
}
final int length = string.length();
add(files, PREFIX +
string.substring(string.lastIndexOf('/', length - 1) + 1, length));
}
}
}
return files;
}
// -- Helper methods --
private void add(final HashSet<String> set, final String item) {
log("\t" + item);
set.add(item);
}
private void log(final String msg) {
System.out.println(msg);
}
// -- Helper Class --
/**
* {@link StreamFactory} implementation for writing an annotation.
*
*/
private static class AnnotationStreamFactory implements StreamFactory {
private final File outputDirectory;
public AnnotationStreamFactory(final File outputDirectory) {
this.outputDirectory = outputDirectory;
}
@Override
public InputStream openInput(String annotationName) throws IOException {
return null;
}
@Override
public OutputStream openOutput(String annotationName) throws IOException {
final File file = new File(outputDirectory, PREFIX + annotationName);
return new FileOutputStream(file);
}
@Override
public boolean isClassObsolete(String className) {
return false;
}
}
// -- Main method --
public static void main(final String[] args) throws Exception {
new AnnotationCombiner().combine(args.length > 0 ? new File(args[0]) : null);
}
}