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package gtPlusPlus.preloader;
import java.security.AllPermission;
import java.security.CodeSource;
import java.security.Permissions;
import java.security.ProtectionDomain;
import java.security.cert.Certificate;
import java.util.HashMap;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.tree.ClassNode;
public class CustomClassLoader extends ClassLoader {
private HashMap<String, ClassNode> classes = new HashMap<String, ClassNode>();
@Override
public Class<?> loadClass(String name) throws ClassNotFoundException {
return findClass(name);
}
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
ClassNode node = classes.get(name.replace('.', '/'));
if (node != null)
return nodeToClass(node);
else
return super.findClass(name);
}
public final void addNode(ClassNode node) {
classes.put(node.name, node);
}
private final Class<?> nodeToClass(ClassNode node) {
if (super.findLoadedClass(node.name) != null)
return findLoadedClass(node.name);
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
node.accept(cw);
byte[] b = cw.toByteArray();
return defineClass(node.name.replace('/', '.'), b, 0, b.length, getDomain());
}
private final ProtectionDomain getDomain() {
CodeSource code = new CodeSource(null, (Certificate[]) null);
return new ProtectionDomain(code, getPermissions());
}
private final Permissions getPermissions() {
Permissions permissions = new Permissions();
permissions.add(new AllPermission());
return permissions;
}
}
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