Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* streams library
*
* Copyright (C) 2011-2014 by Christian Bockermann, Hendrik Blom
*
* streams is a library, API and runtime environment for processing high
* volume data streams. It is composed of three submodules "stream-api",
* "stream-core" and "stream-runtime".
*
* The streams library (and its submodules) is free software: you can
* redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* The stream.ai library (and its submodules) 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package stream.doc;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author chris
*
*/
public class ClassFinder {
static Logger log = LoggerFactory.getLogger(ClassFinder.class);
/**
* Scans all classes accessible from the context class loader which belong
* to the given package and subpackages.
*
* @param packageName
* The base package
* @return The classes
* @throws ClassNotFoundException
* @throws IOException
*/
public static List> getClasses(String packageName)
throws ClassNotFoundException, IOException {
ArrayList> classes = new ArrayList>();
ClassLoader classLoader = ClassFinder.class.getClassLoader(); // .getContextClassLoader();
log.debug("Using class-loader {}", classLoader);
assert classLoader != null;
List resources = new ArrayList();
String path = packageName.replace('.', '/');
Enumeration urlList = classLoader.getResources(path);
while (urlList.hasMoreElements()) {
resources.add(urlList.nextElement());
}
if (classLoader instanceof URLClassLoader) {
@SuppressWarnings("resource")
URLClassLoader ucl = (URLClassLoader) classLoader;
URL[] urls = ucl.getURLs();
if (urls != null) {
for (URL url : urls) {
log.debug("Adding URL {} from URLClassLoader", url);
resources.add(url);
}
}
// closing the ucl object will interfere with junit tests
// ucl.close();
}
List dirs = new ArrayList();
for (URL resource : resources) {
if (resource.toString().startsWith("jar:")
|| resource.toExternalForm().endsWith(".jar")) {
log.debug("Scanning jar-file {}", resource.getPath());
String p = resource.getPath();
if (p.indexOf("!") > 0) {
p = p.substring(0, p.indexOf("!"));
log.trace("Opening jar '{}'", p);
}
if (p.startsWith("file:"))
p = p.substring("file:".length());
classes.addAll(findClasses(new JarFile(p), packageName));
} else {
log.trace("Checking URL {}", resource);
dirs.add(new File(resource.getFile()));
}
}
for (File directory : dirs) {
List> cl = findClasses(directory, packageName);
log.debug("Found {} classes in {}", cl.size(), directory);
classes.addAll(cl);
}
return classes;
}
public static List> findClasses(JarFile jar, String packageName)
throws ClassNotFoundException {
List> classes = new ArrayList>();
log.debug("Checking jar-file {}", jar.getName());
Enumeration en = jar.entries();
while (en.hasMoreElements()) {
JarEntry entry = en.nextElement();
String resourceName = entry.getName().replaceAll("/", ".");
log.debug("Checking JarEntry '{}' (as className: {})",
entry.getName(), resourceName);
if (!resourceName.startsWith(packageName)) {
// log.info("Skipping entry due to package name mismatch!");
continue;
}
if (entry.getName().endsWith(".class")
&& !entry.getName().startsWith("com.rapidminer")
&& entry.getName().replaceAll("/", ".")
.startsWith(packageName)) {
try {
String className = entry.getName()
.replaceAll("\\.class$", "").replace('/', '.');
log.trace("Class-name is: '{}'", className);
Class clazz = Class.forName(className, false,
ClassFinder.class.getClassLoader());
log.trace("Found class {}", clazz);
classes.add(clazz);
} catch (IllegalAccessError iae) {
} catch (VerifyError ve) {
} catch (NoClassDefFoundError ncdfe) {
} catch (ClassNotFoundException cnfe) {
log.error("Failed to locate class for entry '{}': {}",
entry, cnfe.getMessage());
} catch (Exception e) {
log.error("Failed to load class for entry '{}'",
entry.getName());
}
}
}
return classes;
}
/**
* Recursive method used to find all classes in a given directory and
* subdirs.
*
* @param directory
* The base directory
* @param packageName
* The package name for classes found inside the base directory
* @return The classes
* @throws ClassNotFoundException
*/
private static List> findClasses(File directory, String packageName)
throws ClassNotFoundException {
if (packageName.startsWith("com.rapidminer"))
return new ArrayList>();
log.debug("Searching directory '{}' for package '{}'", directory,
packageName);
List> classes = new ArrayList>();
if (!directory.exists()) {
return classes;
}
File[] files = directory.listFiles();
if (files == null)
return classes;
for (File file : files) {
if (file.isDirectory()) {
if (file.getName().contains("."))
continue;
if (packageName.isEmpty()) {
classes.addAll(findClasses(file, file.getName()));
} else {
classes.addAll(findClasses(file,
packageName + "." + file.getName()));
}
} else if (file.getName().endsWith(".class")) {
try {
String className = packageName
+ '.'
+ file.getName().substring(0,
file.getName().length() - 6);
while (className.startsWith("."))
className = className.substring(1);
log.debug("Loading class '{}'", className);
classes.add(Class.forName(className));
} catch (ClassNotFoundException cnfe) {
} catch (NoClassDefFoundError ncdfe) {
} catch (Exception e) {
log.error("Failed to add class: {}", e.getMessage());
}
}
}
return classes;
}
}
