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CommandWords.java
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CommandWords.java
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import java.util.HashMap;
/**
* This class holds an enumeration of all command words known to the game.
* It is used to recognise commands as they are typed in.
*
* @author 162224
* @version 15/11
*/
public class CommandWords
{
// A mapping between a command word and the CommandWord
// associated with it.
private HashMap<String, CommandWord> validCommands;
/**
* Constructor - initialise the command words.
*/
public CommandWords()
{
validCommands = new HashMap<String, CommandWord>();
for(CommandWord command : CommandWord.values()) {
if(command != CommandWord.UNKNOWN) {
validCommands.put(command.toString(), command);
}
}
}
/**
* Find the CommandWord associated with a command word.
* @param commandWord The word to look up.
* @return The CommandWord correspondng to commandWord, or UNKNOWN
* if it is not a valid command word.
*/
public CommandWord getCommandWord(String commandWord)
{
CommandWord command = validCommands.get(commandWord);
if(command != null) {
return command;
}
else {
return CommandWord.UNKNOWN;
}
}
/**
* Check whether a given String is a valid command word.
* @return true if it is, false if it isn't.
*/
public boolean isCommand(String aString)
{
return validCommands.containsKey(aString);
}
/**
* Print all valid commands to System.out.
*/
public void showAll()
{
for(String command : validCommands.keySet()) {
System.out.print(command + " ");
}
System.out.println();
}
}