/** Closes the loader and jar file */
public final synchronized void close() {
if (System.getProperty("java.version")
.startsWith("1.6")) { // Java 6 doesn't have the URLClassLoader.close() method
try { // Insert Reflection Magic
Class<?> clazz = URLClassLoader.class;
Field ucpField = clazz.getDeclaredField("ucp"); // get field for sun.misc.URLClassPath
ucpField.setAccessible(true); // Allow access
Object ucp = ucpField.get(this); // get URLClassPath instance
Field loadersField =
ucp.getClass().getDeclaredField("loaders"); // get the loaders collection
loadersField.setAccessible(true); // Allow access
Object loaders = loadersField.get(ucp); // get loaders
for (Object jarLoader : ((Collection<?>) loaders)) { // iterate the loaders
try {
Field jarField = jarLoader.getClass().getDeclaredField("jar"); // Get the jarField
jarField.setAccessible(true); // Allow access
Object jarFile = jarField.get(jarLoader); // get the JarFile
((JarFile) jarFile).close(); // Close jar
} catch (Throwable t) {
// Not a loader, ignored...
}
}
} catch (Throwable t) {
// probably not a SUN/Oracle VM
}
} else { // If running on Java 7 or above, call URLClassLoader.close(). Since we should be
// compiling with Java 6, lower versions shouldn't be a worry
try {
// We have to invoke the method since we compile with Java 6 (or should be)
URLClassLoader.class.getDeclaredMethod("close").invoke(this);
} catch (Exception ex) {
// Probably IOException, ignore it.
}
}
ccw.removeLoader(this); // And finally remove url and classes from the jar
}
