| 1 | /** |
| 2 | * |
| 3 | */ |
| 4 | package net.digitaltsunami.word.trie.filter; |
| 5 | |
| 6 | /** |
| 7 | * Basic filter to include only characters determined to be letters. Uses |
| 8 | * {@link Character#isLetter(char)} to determine validity. |
| 9 | * |
| 10 | * @author dhagberg |
| 11 | * |
| 12 | */ |
| 13 | public class LetterCharFilter implements CharFilter { |
| 14 | |
| 15 | /** |
| 16 | * Returns character if it {@link Character#isLetter(char)} returns true, |
| 17 | * otherwise it will return {@link CharFilter#SKIP_CHAR}. |
| 18 | */ |
| 19 | @Override |
| 20 | public char apply(char input) { |
| 21 | return Character.isLetter(input) | input == ' ' ? input : CharFilter.SKIP_CHAR; |
| 22 | } |
| 23 | |
| 24 | } |