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/*
D-Bus Java Implementation
Copyright (c) 2005-2006 Matthew Johnson
This program is free software; you can redistribute it and/or modify it
under the terms of either the GNU General Public License Version 2 or the
Academic Free Licence Version 2.1.
Full licence texts are included in the COPYING file with this program.
*/
package org.freedesktop.dbus;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Proxy;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.List;
import org.freedesktop.DBus;
import org.freedesktop.dbus.exceptions.DBusException;
import org.freedesktop.dbus.exceptions.DBusExecutionException;
import org.freedesktop.dbus.exceptions.NotConnected;
import cx.ath.matthew.debug.Debug;
class RemoteInvocationHandler implements InvocationHandler
{
public static final int CALL_TYPE_SYNC = 0;
public static final int CALL_TYPE_ASYNC = 1;
public static final int CALL_TYPE_CALLBACK = 2;
public static Object convertRV(String sig, Object[] rp, Method m, AbstractConnection conn) throws DBusException
{
Class c = m.getReturnType();
if (null == rp) {
if(null == c || Void.TYPE.equals(c)) return null;
else throw new DBusExecutionException("Wrong return type (got void, expected a value)");
}
switch (rp.length) {
case 0:
if (null == c || Void.TYPE.equals(c))
return null;
else throw new DBusExecutionException("Wrong return type (got void, expected a value)");
case 1:
try {
rp = Marshalling.deSerializeParameters(rp,
new Type[] { m.getGenericReturnType() }, conn);
}
catch (Exception e) {
if (AbstractConnection.EXCEPTION_DEBUG && Debug.debug) Debug.print(Debug.ERR, e);
throw new DBusExecutionException("Wrong return type (failed to de-serialize correct types: "+e.getMessage()+")");
}
return rp[0];
default:
// check we are meant to return multiple values
if (!Tuple.class.isAssignableFrom(c))
throw new DBusExecutionException("Wrong return type (not expecting Tuple)");
try {
rp = Marshalling.deSerializeParameters(rp, ((ParameterizedType) m.getGenericReturnType()).getActualTypeArguments(), conn);
} catch (Exception e) {
if (AbstractConnection.EXCEPTION_DEBUG && Debug.debug) Debug.print(Debug.ERR, e);
throw new DBusExecutionException("Wrong return type (failed to de-serialize correct types: "+e.getMessage()+")");
}
Constructor cons = c.getConstructors()[0];
try {
return cons.newInstance(rp);
} catch (Exception e) {
if (AbstractConnection.EXCEPTION_DEBUG && Debug.debug) Debug.print(Debug.ERR, e);
throw new DBusException(e.getMessage());
}
}
}
public static Object executeRemoteMethod(RemoteObject ro, Method m, AbstractConnection conn, int syncmethod, CallbackHandler callback, Object... args) throws DBusExecutionException
{
Type[] ts = m.getGenericParameterTypes();
String sig = null;
if (ts.length > 0) try {
sig = Marshalling.getDBusType(ts);
args = Marshalling.convertParameters(args, ts, conn);
} catch (DBusException DBe) {
throw new DBusExecutionException("Failed to construct D-Bus type: "+DBe.getMessage());
}
MethodCall call;
byte flags = 0;
if (!ro.autostart) flags |= Message.Flags.NO_AUTO_START;
if (syncmethod == CALL_TYPE_ASYNC) flags |= Message.Flags.ASYNC;
if (m.isAnnotationPresent(DBus.Method.NoReply.class)) flags |= Message.Flags.NO_REPLY_EXPECTED;
try {
if (null == ro.iface)
call = new MethodCall(ro.busname, ro.objectpath, null, m.getName(),flags, sig, args);
else
call = new MethodCall(ro.busname, ro.objectpath, AbstractConnection.dollar_pattern.matcher(ro.iface.getName()).replaceAll("."), m.getName(), flags, sig, args);
} catch (DBusException DBe) {
if (AbstractConnection.EXCEPTION_DEBUG && Debug.debug) Debug.print(Debug.ERR, DBe);
throw new DBusExecutionException("Failed to construct outgoing method call: "+DBe.getMessage());
}
if (null == conn.outgoing) throw new NotConnected("Not Connected");
switch (syncmethod) {
case CALL_TYPE_ASYNC:
conn.queueOutgoing(call);
return new DBusAsyncReply(call, m, conn);
case CALL_TYPE_CALLBACK:
synchronized (conn.pendingCallbacks) {
if (Debug.debug) Debug.print(Debug.VERBOSE, "Queueing Callback "+callback+" for "+call);
conn.pendingCallbacks.put(call, callback);
conn.pendingCallbackReplys.put(call, new DBusAsyncReply(call, m, conn));
}
conn.queueOutgoing(call);
return null;
case CALL_TYPE_SYNC:
conn.queueOutgoing(call);
break;
}
// get reply
if (m.isAnnotationPresent(DBus.Method.NoReply.class)) return null;
Message reply = call.getReply();
if (null == reply) throw new DBus.Error.NoReply("No reply within specified time");
if (reply instanceof Error)
((Error) reply).throwException();
try {
return convertRV(reply.getSig(), reply.getParameters(), m, conn);
} catch (DBusException e) {
if (AbstractConnection.EXCEPTION_DEBUG && Debug.debug) Debug.print(Debug.ERR, e);
throw new DBusExecutionException(e.getMessage());
}
}
AbstractConnection conn;
RemoteObject remote;
public RemoteInvocationHandler(AbstractConnection conn, RemoteObject remote)
{
this.remote = remote;
this.conn = conn;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
{
if (method.getName().equals("isRemote")) return true;
else if (method.getName().equals("clone")) return null;
else if (method.getName().equals("equals")) {
try {
if (1 == args.length)
return new Boolean(remote.equals(((RemoteInvocationHandler) Proxy.getInvocationHandler(args[0])).remote));
} catch (IllegalArgumentException IAe) {
return Boolean.FALSE;
}
}
else if (method.getName().equals("finalize")) return null;
else if (method.getName().equals("getClass")) return DBusInterface.class;
else if (method.getName().equals("hashCode")) return remote.hashCode();
else if (method.getName().equals("notify")) {
remote.notify();
return null;
} else if (method.getName().equals("notifyAll")) {
remote.notifyAll();
return null;
} else if (method.getName().equals("wait")) {
if (0 == args.length) remote.wait();
else if (1 == args.length
&& args[0] instanceof Long) remote.wait((Long) args[0]);
else if (2 == args.length
&& args[0] instanceof Long
&& args[1] instanceof Integer)
remote.wait((Long) args[0], (Integer) args[1]);
if (args.length <= 2)
return null;
}
else if (method.getName().equals("toString"))
return remote.toString();
return executeRemoteMethod(remote, method, conn, CALL_TYPE_SYNC, null, args);
}
}
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