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Replace numbers 1..12 with Roman numerals

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e.g. "Star Wars: Episode 4" -> "Star Wars: Episode IV"
This commit is contained in:
Reinhard Pointner 2016-11-22 09:59:42 +08:00
parent b6c2329e79
commit 894f76d8bc
1 changed files with 31 additions and 0 deletions
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31
source/net/filebot/format/ExpressionFormatMethods.java
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@ -21,6 +21,7 @@ import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.TreeMap;
import java.util.function.Function;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@ -329,6 +330,36 @@ public class ExpressionFormatMethods {
return self;
}
/**
* Replace numbers 1..12 with Roman numerals
*
* e.g. "Star Wars: Episode 4" -> "Star Wars: Episode IV"
*/
public static String roman(String self) {
TreeMap<Integer, String> numerals = new TreeMap<Integer, String>();
numerals.put(10, "X");
numerals.put(9, "IX");
numerals.put(5, "V");
numerals.put(4, "IV");
numerals.put(1, "Ⅰ");
StringBuffer s = new StringBuffer();
Matcher m = compile("\\b\\d+\\b").matcher(self);
while (m.find()) {
int n = Integer.parseInt(m.group());
m.appendReplacement(s, n >= 1 && n <= 12 ? roman(n, numerals) : m.group());
}
return m.appendTail(s).toString();
}
public static String roman(Integer n, TreeMap<Integer, String> numerals) {
int l = numerals.floorKey(n);
if (n == l) {
return numerals.get(n);
}
return numerals.get(l) + roman(n - l, numerals);
}
/**
* Apply ICU transliteration
*