com.sun.grizzly.util.ClassLoaderUtil Maven / Gradle / Ivy
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package com.sun.grizzly.util;
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
/**
* Simple Classloader utility.
*
* @author Jeanfrancois Arcand
*/
public class ClassLoaderUtil {
/**
* Create a class loader that can load classes from the specified
* file directory. The file directory must contains .jar ot .zip
*
* @param file a directory
* @param ClassLoader the parent classloader, or null if none.
* @return A Classloader that can load classes from a directory that
* contains jar and zip files.
*/
public final static ClassLoader createClassloader(File libDir, ClassLoader cl)
throws IOException{
URLClassLoader urlClassloader = null;
if (libDir.exists()){
if (libDir.isDirectory()){
String[] jars = libDir.list(new FilenameFilter() {
public boolean accept(File dir, String name) {
if (name.endsWith(".jar") || name.endsWith(".zip")){
return true;
} else {
return false;
}
}
});
URL[] urls = new URL[jars.length];
for (int i=0; i < jars.length; i++){
String path = new File(libDir.getName()
+ File.separator + jars[i]).getCanonicalFile().toURL()
.toString();
urls[i] = new URL(path);
}
urlClassloader = new URLClassLoader(urls,cl);
}
}
return urlClassloader;
}
}