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package eu.equalparts.cardbase.comparator;
final class ComparatorDelegates {
private ComparatorDelegates() {}
/*
* Delegates
*/
/**
* Compares two dirty numbers, that is, strings containing a single number
* and, optionally, additional non-numerical characters.
* For instance, when comparing "150a" and "36", this comparator delegate
* first compares 150 with 36 using the standard integer comparison, and
* returns an integer > 1 because 150 > 36.
*
* @param field1 the first field to compare.
* @param field2 the second field to compare.
* @return a value smaller than, equal to or greater than 0 according to the standard comparison convention.
*/
public static Integer compareDirtyNumber(Comparable<String> field1, Comparable<String> field2) {
// this assumes that the format is uninterrupted numbers and letters
String number1 = ((String) field1).replaceAll("[^0-9]+", "");
String number2 = ((String) field2).replaceAll("[^0-9]+", "");
Integer int1 = number1.matches("[0-9]+") ? Integer.parseInt(number1) : null;
Integer int2 = number2.matches("[0-9]+") ? Integer.parseInt(number2) : null;
if (int1 == null) {
if (int2 != null) {
// field1 has no numbers but field2 does, field1 is less by default
// if neither have numbers, letters will be looked at below
return -1;
}
} else if (int2 == null) {
// field2 has no numbers but field1 does, field1 is more by default
return 1;
} else {
// both have numbers, perform comparison if not identical
// if identical, look at letters below
if (int1 != int2)
return int1.compareTo(int2);
}
// compare by letters
String letter1 = number1.replaceAll("[0-9]+", "");
String letter2 = number2.replaceAll("[0-9]+", "");
return letter1.compareTo(letter2);
}
public static Integer compareRarity(Comparable<String> field1, Comparable<String> field2) {
// assign numerical values based on the different possibilities and compare those instead
Integer value1 = getRarityValue((String) field1);
Integer value2 = getRarityValue((String) field2);
return value1.compareTo(value2);
}
/*
* Internally used utility functions
*/
private static int getRarityValue(String rarityString) {
return rarityString.equalsIgnoreCase("Common") ? 0 :
rarityString.equalsIgnoreCase("Uncommon") ? 1 :
rarityString.equalsIgnoreCase("Rare") ? 2 :
rarityString.equalsIgnoreCase("Mythic Rare") ? 3 :
rarityString.equalsIgnoreCase("Basic Land") ? 4 :
rarityString.equalsIgnoreCase("Special") ? 5 : 6;
}
}
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