/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.mx.util;
import javax.management.*;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* MBeanTyperInvoker handles method invocations against the MBeanTyper target object
* and forwards them to the MBeanServer and ObjectName for invocation.
*
* @author <a href="mailto:jhaynie@vocalocity.net">Jeff Haynie</a>
*/
final class MBeanTyperInvoker implements java.lang.reflect.InvocationHandler
{
private final MBeanServer server;
private final ObjectName mbean;
private final Map signatureCache = Collections.synchronizedMap(new HashMap());
MBeanTyperInvoker(MBeanServer server, ObjectName mbean)
{
this.server = server;
this.mbean = mbean;
}
private boolean isJMXAttribute(Method m)
{
String name = m.getName();
return (name.startsWith("get"));
}
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable
{
if (MBeanTyper.DEBUG)
{
System.err.println(" ++ method=" + method.getName() + ",args=" + args);
}
try
{
if (method.getDeclaringClass() == Object.class)
{
String name = method.getName();
if (name.equals("hashCode"))
{
return new Integer(this.hashCode());
}
else if (name.equals("toString"))
{
return this.toString();
}
else if (name.equals("equals"))
{
// FIXME: this needs to be reviewed - we should be
// smarter about this ...
return new Boolean(equals(args[0]));
}
}
else if (isJMXAttribute(method) && (args == null || args.length <= 0))
{
String name = method.getName().substring(3);
return server.getAttribute(mbean, name);
}
String sig[] = (String[]) signatureCache.get(method);
if (sig == null)
{
// get the method signature from the method argument directly
// vs. the arguments passed, since there may be primitives that
// are wrapped as objects in the arguments
Class _args[] = method.getParameterTypes();
if (_args != null && _args.length > 0)
{
sig = new String[_args.length];
for (int c = 0; c < sig.length; c++)
{
if (_args[c] != null)
{
sig[c] = _args[c].getName();
}
}
}
else
{
sig = new String[0];
}
signatureCache.put(method, sig);
}
return server.invoke(mbean, method.getName(), args, sig);
}
catch (Throwable t)
{
if (MBeanTyper.DEBUG)
{
t.printStackTrace();
}
if (t instanceof UndeclaredThrowableException)
{
UndeclaredThrowableException ut = (UndeclaredThrowableException) t;
throw ut.getUndeclaredThrowable();
}
else if (t instanceof InvocationTargetException)
{
InvocationTargetException it = (InvocationTargetException) t;
throw it.getTargetException();
}
else if (t instanceof MBeanException)
{
MBeanException me=(MBeanException)t;
throw me.getTargetException();
}
else
{
throw t;
}
}
}
}