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* Syncany, www.syncany.org

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

* This program 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 General Public License for more details.

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

package com.stacksync.desktop.util;

import java.io.File;

import java.io.IOException;

import java.net.JarURLConnection;

import java.net.URL;

import java.util.*;

import java.util.jar.JarEntry;

import java.util.jar.JarFile;

/**

* This utility class was based originally on <a href="private.php?do=newpm&u=47838">Daniel Le Berre</a>'s

* <code>RTSI</code> class. This class can be called in different modes, but the principal use

* is to determine what subclasses/implementations of a given class/interface exist in the current

* runtime environment.

* <p>Extremely slimmed down (2011, PC Heckel)

* @author Daniel Le Berre, Elliott Wade, Philipp C. Heckel

* @see http://www.velocityreviews.com/forums/t137693-find-all-implementing-classes-in-classpath.html

public class ClasspathUtil {

public enum ListType { CLASS, PACKAGE, BOTH };

private final static Comparator<URL> URL_COMPARATOR = new Comparator<URL>() {

@Override public int compare(URL u1, URL u2) { return String.valueOf(u1).compareTo(String.valueOf(u2)); }};

public static Map<URL, String> getClasspathClasses() {

return getClasspathLocations(ListType.CLASS);

}

public static Map<URL, String> getClasspathPackages() {

return getClasspathLocations(ListType.PACKAGE);

}

public static Map<URL, String> getClasspathEntries() {

return getClasspathLocations(ListType.BOTH);

}

/**

* Determine every URL location defined by the current classpath, and

* it's associated package name.

private static Map<URL, String> getClasspathLocations(ListType type) {

Map<URL, String> map = new TreeMap<URL, String>(URL_COMPARATOR);

String classpath = System.getProperty("java.class.path");

//System.out.println ("classpath=" + classpath);

StringTokenizer st = new StringTokenizer(classpath, File.pathSeparator);

while (st.hasMoreTokens()) {

String path = st.nextToken();

//System.out.println("PATH =" +path);

include(null, new File(path), type, map);

}

return map;

}

private static void include(String name, File file, ListType type, Map<URL, String> map) {

if (!file.exists()) {

return;

}

if (!file.isDirectory()) {

// could be a JAR file

includeJar(file, type, map);

return;

}

name = (name == null) ? "" : name + ".";

// add subpackages

File[] entries = file.listFiles();

for (File entry : entries) {

if (entry.isDirectory() && entry.getName().toUpperCase().equals("META-INF")) {

continue;

}

if (!entry.isDirectory() && !entry.getName().endsWith(".class")) {

continue;

}

try {

// Add if in filter

if ((entry.isDirectory() && type != ListType.CLASS) ||

(!entry.isDirectory() && type != ListType.PACKAGE)) {

String entryName = (entry.isDirectory()) ? name + entry.getName() : getFQCN(name + entry.getName());

URL entryURL = new URL("file://" + entry.getCanonicalPath());

map.put(entryURL, entryName);

}

// Include sub directories

if (entry.isDirectory()) {

include(name + entry.getName(), entry, type, map);

}

} catch (IOException ioe) {

continue;

}

private static void includeJar(File file, ListType type, Map<URL, String> map) {

if (file.isDirectory()) {

return;

}

URL jarURL;

JarFile jar;

try {

jarURL = new URL("file://" + file.getCanonicalPath());

jarURL = new URL("jar:" + jarURL.toExternalForm() + "!/");

JarURLConnection conn = (JarURLConnection) jarURL.openConnection();

jar = conn.getJarFile();

} catch (Exception e) {

//System.err.println(e);

// not a JAR or disk I/O error

return;

}

if (jar == null) {

return;

}

// include the jar's "default" package (i.e. jar's root)

map.put(jarURL, "");

Enumeration<JarEntry> e = jar.entries();

while (e.hasMoreElements()) {

JarEntry entry = e.nextElement();

if (entry.isDirectory()) {

if (type == ListType.CLASS) {

continue;

}

if (entry.getName().toUpperCase().equals("META-INF")) {

continue;

}

} else {

if (type == ListType.PACKAGE) {

continue;

}

if (!entry.getName().endsWith(".class")) {

continue;

}

try {

String entryName = (entry.isDirectory()) ? getPackageName(entry.getName()) : getFQCN(entry.getName());

URL entryURL = new URL(jarURL.toExternalForm() + entry.getName());

map.put(entryURL, entryName);

} catch (IOException ioe) {

continue;

}

private static String getPackageName(String s) {

if (s.startsWith("/")) {

s = s.substring(1, s.length());

}

if (s.endsWith("/")) {

s = s.substring(0, s.length() - 1);

}

return s.replace('/', '.');

}

private static String getFQCN(String s) {

s = s.replace('/', '.');

return s.replaceAll("\\.class$", "");

}

public static void main(String[] args) {

long start = System.currentTimeMillis();

for (Map.Entry<URL, String> m : ClasspathUtil.getClasspathPackages().entrySet()) {

String className = m.getValue();

if (!className.startsWith("com.stacksync.desktop.connection.plugins")) {

continue;

}

// if (!className.endsWith("PluginInfo"))

// continue;

System.out.println(m.getValue());

}

long duration = System.currentTimeMillis()-start;

System.out.println("duration: "+duration+"ms");

}

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