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package org.glassfish.apf.impl;
import java.io.File;
import java.io.IOException;
import java.security.PrivilegedAction;
import java.util.Set;
import java.util.Iterator;
import java.util.Enumeration;
import java.util.HashSet;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.jar.JarFile;
import java.util.jar.JarEntry;
import org.glassfish.apf.Scanner;
/**
* Implements the scanner interface on a jar file.
*
* @author Jerome Dochez
*/
public class JarScanner extends JavaEEScanner implements Scanner<Object> {
File jarFile;
Set<JarEntry> entries = new HashSet<JarEntry>();
ClassLoader classLoader = null;
public void process(File jarFile, Object bundleDesc, ClassLoader loader) throws java.io.IOException {
this.jarFile = jarFile;
JarFile jf = new JarFile(jarFile);
try {
Enumeration<JarEntry> entriesEnum = jf.entries();
while(entriesEnum.hasMoreElements()) {
JarEntry je = entriesEnum.nextElement();
if (je.getName().endsWith(".class")) {
entries.add(je);
}
}
} finally {
if (jf != null) {
jf.close();
}
}
initTypes(jarFile);
}
public ClassLoader getClassLoader() {
if (classLoader==null) {
final URL[] urls = new URL[1];
try {
if (jarFile == null) throw new IllegalStateException("jarFile must first be set with the process method.");
urls[0] = jarFile.getAbsoluteFile().toURL();
classLoader = new PrivilegedAction<URLClassLoader>() {
@Override
public URLClassLoader run() {
return new URLClassLoader(urls);
}
}.run();
} catch(Exception e) {
e.printStackTrace();
}
}
return classLoader;
}
public Set<Class> getElements() {
Set<Class> elements = new HashSet<Class>();
if (getClassLoader()==null) {
AnnotationUtils.getLogger().severe("Class loader null");
return elements;
}
for (JarEntry je : entries) {
String fileName = je.getName();
// convert to a class name...
String className = fileName.replace(File.separatorChar, '.');
className = className.substring(0, className.length()-6);
try {
elements.add(classLoader.loadClass(className));
} catch(ClassNotFoundException cnfe) {
cnfe.printStackTrace();
}
}
return elements;
}
}