Difference between revisions of "READERNAME ExceptionHandler.java"

Revision as of 19:15, 1 February 2008

This class should extend GenericExceptionHandler.

It should override three methods:

CommandNotFoundError

This exception is thrown in the CommandAdapter if a command is sent to the reader that is not defined in the reader.xml

public abstract ArrayList<Object> commandNotFoundError(ArrayList<Object> arg, CommandObject obj);

Arguments

1. arg - The incoming command
2. obj - The incoming command object

Return Value

An array of objects where the first object in the array is a message to be sent back to the client.

Reference Implementation

This is the commandNotFoundError in the alien reader

	public ArrayList<Object> commandNotFoundError(ArrayList<Object> arg,
			CommandObject obj) {
		String message = "";
		for (Object i : arg) {
			message += i.toString();
		}
		message = "Error 1: Command not understood" + message;
		ArrayList<Object> returnValue = new ArrayList<Object>();
		returnValue.add(message);
                return returnValue;

	}

invalidCommandError

public abstract ArrayList<Object> invalidCommandError(ArrayList<Object> arg, String value, CommandObject obj);

malformedMessageError

public abstract ArrayList<Object> malformedMessageError(ArrayList<Object> arg, CommandObject obj);