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package com.sun.ejb.containers;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Proxy;
import java.lang.reflect.Method;
import javax.ejb.EJBException;
import java.rmi.RemoteException;
public final class InvocationHandlerUtil {
InvocationHandlerUtil() {}
public static Object invokeJavaObjectMethod(InvocationHandler handler,
Method method, Object[] args)
throws EJBException {
Object returnValue = null;
// Can only be one of :
// boolean java.lang.Object.equals(Object)
// int java.lang.Object.hashCode()
// String java.lang.Object.toString()
//
// Optimize by comparing as few characters as possible.
switch( method.getName().charAt(0) ) {
case 'e' :
boolean result = false;
if (args[0] != null) {
Object other = Proxy.isProxyClass(args[0].getClass()) ?
Proxy.getInvocationHandler(args[0]) : args[0];
result = handler.equals(other);
}
returnValue = result;
break;
case 'h' :
returnValue = handler.hashCode();
break;
case 't' :
returnValue = handler.toString();
break;
default :
throw new EJBException(method.getName());
}
return returnValue;
}
public static boolean isDeclaredException(Throwable t,
Class[] declaredExceptions)
{
boolean declaredException = false;
for(int i = 0; i < declaredExceptions.length; i++) {
Class next = declaredExceptions[i];
if( next.isAssignableFrom(t.getClass()) ) {
declaredException = true;
break;
}
}
return declaredException;
}
public static void throwLocalException(Throwable t,
Class[] declaredExceptions)
throws Throwable
{
Throwable toThrow = t;
if( (t instanceof java.lang.RuntimeException) ||
(isDeclaredException(t, declaredExceptions)) ) {
toThrow = t;
} else {
toThrow = new EJBException(t.getMessage());
toThrow.initCause(t);
}
throw toThrow;
}
public static void throwRemoteException(Throwable t,
Class[] declaredExceptions)
throws Throwable
{
Throwable toThrow = t;
if( (t instanceof java.lang.RuntimeException) ||
(t instanceof java.rmi.RemoteException) ||
(isDeclaredException(t, declaredExceptions)) ) {
toThrow = t;
} else {
toThrow = new RemoteException(t.getMessage(), t);
}
throw toThrow;
}
}