org.microemu.microedition.io.ConnectionInvocationHandler Maven / Gradle / Ivy
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/**
* MicroEmulator
* Copyright (C) 2006-2007 Bartek Teodorczyk
* Copyright (C) 2006-2007 Vlad Skarzhevskyy
*
* It is licensed under the following two licenses as alternatives:
* 1. GNU Lesser General Public License (the "LGPL") version 2.1 or any newer version
* 2. Apache License (the "AL") Version 2.0
*
* You may not use this file except in compliance with at least one of
* the above two licenses.
*
* You may obtain a copy of the LGPL at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
*
* You may obtain a copy of the AL at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the LGPL or the AL for the specific language governing permissions and
* limitations.
*
* @version $Id: ConnectionInvocationHandler.java 1605 2008-02-25 21:07:14Z barteo $
*/
package org.microemu.microedition.io;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import javax.microedition.io.Connection;
import org.microemu.log.Logger;
/**
* Dynamic proxy class for GCF Connections returend to MIDlet
* Used to debug excetions thrown to MIDlet
* Makes PrivilegedCalls when rinning in Webstart
*
* @author vlads
*/
public class ConnectionInvocationHandler implements InvocationHandler {
private Connection originalConnection;
/* The context to be used when connecting to network */
private AccessControlContext acc;
static {
Logger.addLogOrigin(ConnectionInvocationHandler.class);
}
public ConnectionInvocationHandler(Connection con, boolean needPrivilegedCalls) {
this.originalConnection = con;
if (needPrivilegedCalls) {
this.acc = AccessController.getContext();
}
}
/* (non-Javadoc)
* @see java.lang.reflect.InvocationHandler#invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[])
*/
public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
if (ConnectorImpl.debugConnectionInvocations) {
Logger.debug("invoke", method);
}
try {
if (this.acc != null) {
return AccessController.doPrivileged(new PrivilegedExceptionAction() {
public Object run() throws InvocationTargetException, IllegalAccessException {
return method.invoke(originalConnection, args);
}
}, acc);
} else {
return method.invoke(this.originalConnection, args);
}
} catch (PrivilegedActionException e) {
if (e.getCause() instanceof InvocationTargetException) {
if (ConnectorImpl.debugConnectionInvocations) {
Logger.error("Connection." + method.getName(), e.getCause().getCause());
}
throw e.getCause().getCause();
} else {
if (ConnectorImpl.debugConnectionInvocations) {
Logger.error("Connection." + method.getName(), e.getCause());
}
throw e.getCause();
}
} catch (InvocationTargetException e) {
if (ConnectorImpl.debugConnectionInvocations) {
Logger.error("Connection." + method.getName(), e.getCause());
}
throw e.getCause();
}
}
}