private void processExpressionCommand(
Commands.ValueObject valueObject, InvokableValueSender valueSender)
throws IOException, CommandException {
Integer expressionID = new Integer(in.readInt());
byte cmdType = in.readByte();
ExpressionProcesserController exp = null;
switch (cmdType) {
case ExpressionCommands.START_EXPRESSION_TREE_PROCESSING:
byte trace = in.readByte();
if (trace == ExpressionCommands.TRACE_DEFAULT)
exp = new ExpressionProcesserController(server, this);
else
exp =
new ExpressionProcesserController(server, this, trace == ExpressionCommands.TRACE_ON);
expressionProcessors.put(expressionID, exp);
break;
case ExpressionCommands.TRANSFER_EXPRESSION_REQUEST:
exp = (ExpressionProcesserController) expressionProcessors.remove(expressionID);
sendObject(exp, NOT_A_PRIMITIVE, valueObject, out, true);
break;
case ExpressionCommands.RESUME_EXPRESSION_REQUEST:
Commands.readValue(in, valueObject);
exp = (ExpressionProcesserController) getInvokableObject(valueObject);
expressionProcessors.put(expressionID, exp);
break;
case ExpressionCommands.PUSH_EXPRESSION:
exp = (ExpressionProcesserController) expressionProcessors.get(expressionID);
exp.process(in);
break;
case ExpressionCommands.SYNC_REQUEST:
boolean haveProxies =
in.readBoolean(); // See if we expression proxy ids that need to be resolved
if (haveProxies) {
Commands.readValue(in, valueObject);
valueSender.initialize(valueObject);
Commands.readArray(in, valueObject.anInt, valueSender, valueObject, false);
}
exp = (ExpressionProcesserController) expressionProcessors.get(expressionID);
if (haveProxies)
sendExpressionProxyResolutions(valueObject, (int[]) valueSender.getArray(), exp);
if (exp.noErrors()) {
valueObject.set(true); // Mark that all is good.
Commands.writeValue(out, valueObject, true, true);
} else {
processExpressionError(exp, valueObject);
}
break;
case ExpressionCommands.PULL_VALUE_REQUEST:
haveProxies = in.readBoolean(); // See if we expression proxy ids that need to be resolved
if (haveProxies) {
Commands.readValue(in, valueObject);
valueSender.initialize(valueObject);
Commands.readArray(in, valueObject.anInt, valueSender, valueObject, false);
}
exp = (ExpressionProcesserController) expressionProcessors.get(expressionID);
if (haveProxies)
sendExpressionProxyResolutions(valueObject, (int[]) valueSender.getArray(), exp);
if (exp.noErrors()) {
try {
Object[] pulledValue = exp.pullValue();
// Send back the command code for pull value. Don't flush. We will flush when all done.
if (((Class) pulledValue[1]).isPrimitive()) {
int returnTypeID = server.getIdentityID(pulledValue[1]);
// Need to tell sendObject the correct primitive type.
sendObject(pulledValue[0], returnTypeID, valueObject, out, true, true);
} else {
sendObject(
pulledValue[0],
NOT_A_PRIMITIVE,
valueObject,
out,
true,
true); // Just send the object back. sendObject knows how to iterpret the type
}
} catch (NoExpressionValueException e) {
sendNoValueErrorCommand(exp, valueObject);
}
} else processExpressionError(exp, valueObject);
break;
case ExpressionCommands.END_EXPRESSION_TREE_PROCESSING:
exp = (ExpressionProcesserController) expressionProcessors.remove(expressionID);
exp.close();
break;
}
}
