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package org.jvnet.hk2.internal;
import java.lang.reflect.Method;
import javassist.util.proxy.MethodHandler;
import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.Context;
import org.glassfish.hk2.api.MultiException;
import org.glassfish.hk2.api.ServiceHandle;
import org.glassfish.hk2.utilities.reflection.ReflectionHelper;
/**
* @author jwells
* @author mtaube
*/
public class MethodInterceptorImpl implements MethodHandler {
private final static String PROXY_MORE_METHOD_NAME = "__make";
private final ServiceLocatorImpl locator;
private final ActiveDescriptor descriptor;
private final ServiceHandle root;
/* package */ MethodInterceptorImpl(ServiceLocatorImpl sli, ActiveDescriptor descriptor, ServiceHandle root) {
this.locator = sli;
this.descriptor = descriptor;
this.root = root;
}
@Override
public Object invoke(Object target, Method method, Method proceed, Object[] params) throws Throwable {
Context context;
Object service;
context = locator.resolveContext(descriptor.getScopeAnnotation());
service = context.findOrCreate(descriptor, root);
if (service == null) {
throw new MultiException(new IllegalStateException("Proxiable context " +
context + " findOrCreate returned a null for descriptor " + descriptor +
" and handle " + root));
}
if (method.getName().equals(PROXY_MORE_METHOD_NAME)) {
// We did what we came here to do
return service;
}
return ReflectionHelper.invoke(service, method, params, locator.getNeutralContextClassLoader());
}
}