/**
* This class is the main class of the "World of Zuul" application.
* "World of Zuul" is a very simple, text based adventure game.
*
* This class holds information about a command that was issued by the user.
* A command currently consists of two strings: a command word and a second
* word (for example, if the command was "take map", then the two strings
* obviously are "take" and "map").
*
* The way this is used is: Commands are already checked for being valid
* command words. If the user entered an invalid command (a word that is
* not known) then the command word is <null>.
*
* If the command had only one word, then the second word is <null>.
*
* @author Naufaliando
* @version 1.0
*/
class Command
{
private String commandWord;
private String secondWord;
/**
* Create a command object. First and second word must be supplied, but
* either one (or both) can be null. The command word should be null to
* indicate that this was a command that is not recognised by this game.
*/
public Command(String firstWord, String secondWord)
{
commandWord = firstWord;
this.secondWord = secondWord;
}
/**
* Return the command word (the first word) of this command.
* If the command was not understood, the result is null.
*/
public String getCommandWord()
{
return commandWord;
}
/**
* Return the second word of this command. Returns null
* if there was no second word.
*/
public String getSecondWord()
{
return secondWord;
}
/**
* Return true if this command was not understood.
*/
public boolean isUnknown()
{
return (commandWord == null);
}
/**
* Return true if the command has a second word.
*/
public boolean hasSecondWord()
{
return (secondWord != null);
}
}