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/*
* Sonar, open source software quality management tool.
* Copyright (C) 2008-2012 SonarSource
* mailto:contact AT sonarsource DOT com
*
* Sonar is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* Sonar is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sonar; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
*/
package org.sonar.server.plugins;
import com.google.common.base.*;
import com.google.common.collect.Lists;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.CharEncoding;
import org.apache.commons.lang.StringUtils;
import javax.annotation.Nullable;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Collection;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
/**
* @since 2.15
*/
public final class ClassLoaderUtils {
private ClassLoaderUtils() {
}
public static File copyResources(ClassLoader classLoader, String rootPath, File toDir) {
return copyResources(classLoader, rootPath, toDir, Functions.<String>identity());
}
public static File copyResources(ClassLoader classLoader, String rootPath, File toDir, Function<String, String> relocationFunction) {
Collection<String> relativePaths = listFiles(classLoader, rootPath);
for (String relativePath : relativePaths) {
URL resource = classLoader.getResource(relativePath);
String filename = relocationFunction.apply(relativePath);
File toFile = new File(toDir, filename);
try {
FileUtils.copyURLToFile(resource, toFile);
} catch (IOException e) {
throw new IllegalStateException("Fail to extract " + relativePath + " to " + toFile.getAbsolutePath());
}
}
return toDir;
}
/**
* Finds files within a given directory and its subdirectories
*
* @param classLoader
* @param rootPath the root directory, for example org/sonar/sqale
* @return a list of relative paths, for example {"org/sonar/sqale/foo/bar.txt}. Never null.
*/
public static Collection<String> listFiles(ClassLoader classLoader, String rootPath) {
return listResources(classLoader, rootPath, new Predicate<String>() {
public boolean apply(@Nullable String path) {
return !StringUtils.endsWith(path, "/");
}
});
}
public static Collection<String> listResources(ClassLoader classLoader, String rootPath) {
return listResources(classLoader, rootPath, Predicates.<String>alwaysTrue());
}
/**
* Finds directories and files within a given directory and its subdirectories.
*
* @param classLoader
* @param rootPath the root directory, for example org/sonar/sqale, or a file in this root directory, for example org/sonar/sqale/index.txt
* @param
* @return a list of relative paths, for example {"org/sonar/sqale", "org/sonar/sqale/foo", "org/sonar/sqale/foo/bar.txt}. Never null.
*/
public static Collection<String> listResources(ClassLoader classLoader, String rootPath, Predicate<String> predicate) {
try {
Collection<String> paths = Lists.newArrayList();
rootPath = StringUtils.removeStart(rootPath, "/");
URL root = classLoader.getResource(rootPath);
if (root != null) {
checkJarFile(root);
// Path of the root directory
// Examples :
// org/sonar/sqale/index.txt -> rootDirectory is org/sonar/sqale
// org/sonar/sqale/ -> rootDirectory is org/sonar/sqale
// org/sonar/sqale -> rootDirectory is org/sonar/sqale
String rootDirectory = rootPath;
if (StringUtils.substringAfterLast(rootPath, "/").indexOf('.') >= 0) {
rootDirectory = StringUtils.substringBeforeLast(rootPath, "/");
}
String jarPath = root.getPath().substring(5, root.getPath().indexOf("!")); //strip out only the JAR file
JarFile jar = new JarFile(URLDecoder.decode(jarPath, CharEncoding.UTF_8));
Enumeration<JarEntry> entries = jar.entries();
while (entries.hasMoreElements()) {
String name = entries.nextElement().getName();
if (name.startsWith(rootDirectory) && predicate.apply(name)) {
paths.add(name);
}
}
}
return paths;
} catch (Exception e) {
throw Throwables.propagate(e);
}
}
private static void checkJarFile(URL root) {
if (!"jar".equals(root.getProtocol())) {
throw new IllegalStateException("Unsupported protocol: " + root.getProtocol());
}
}
}
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