Can you compare a parameter to another parameter using ChoiceFormat?

Question

I'm currently using the I18NBundle (wiki | docs) package from LibGDX to do some internationalization for my game. the I18NBundle internally uses the java MessageFormat (docs) to format strings such as this:

// The string to format.
shields = Shields: {0, number, integer}

// Do the formatting
bundle.format("shields", 5);
>> Shields: 5

It can also do conditionals like so:

// # = if exact
// < = if greater than
shields = Shields: {0, choice, 0# No Shields! | 1# One Shield! | 1< {0, number, integer} Shields!}

bundle.format("shields", 0);
>> Shields: No Shield!

bundle.format("shields", 1);
>> Shields: One Shield!

bundle.format("shields", 5);
>> Shields: 5 Shields!

Now I'm trying to compare two input parameters to each other. I tried this:

// If parameter 1 is greater than parameter 0...
score = Score: {0, choice, {1}< {0} New high score! | {0}}

bundle.format("score", newScore, highScore);

// Expected Output if new score is lesser than high score
bundle.format("score", 1, 5);
>> Score: 1

// Expected output if new score is greater than high score
bundle.format("score", 7, 5);
>> Score: 7 New high score!

But this throws an exception since it is invalid formatting. So my question is: Is it possible to compare two input parameters to each other when using ChoiceFormat?

Answer 1

You can use this workaround of using a number (0 for false and 1 for true) instead of a boolean, since a boolean is not permitted.

condition=Score: {0,choice,0#Cool Score, but {1, number} is less than {2, number}!|1#New Highscore of {1, number}!}

This code :

int highScore = 15;
int newScore = 20;

boolean isHighScore = newScore > highScore;

//I use a ternary if in order to translate the boolean into a number since booleans
//are not accepted by ChoiceFormat
String res = i18NBundle.format("condition", isHighScore ? 1 : 0, newScore, highScore);
System.out.println(res);

//I test again with a new score that is not the highscore
if(isHighScore)
    highScore = newScore;

newScore = 13;
isHighScore = newScore > highScore;
String res2 =i18NBundle.format("condition", isHighScore ? 1 : 0, newScore, highScore);
System.out.println(res2);

Outputs :

Score: New Highscore of 20!
Score: Cool Score, but 13 is less than 20!