Returns a string copy of the input character sequence, with each group of consecutive characters that match this matcher replaced by a single replacement character. For example: CharMatcher.anyOf("eko").collapseFrom("bookkeeper", '-') ... returns "b-p-r". The de
(CharSequence sequence, char replacement)
| 991 | |
| 992 | |
| 993 | public String collapseFrom(CharSequence sequence, char replacement) { |
| 994 | // This implementation avoids unnecessary allocation. |
| 995 | int len = sequence.length(); |
| 996 | for (int i = 0; i < len; i++) { |
| 997 | char c = sequence.charAt(i); |
| 998 | if (matches(c)) { |
| 999 | if (c == replacement && (i == len - 1 || !matches(sequence.charAt(i + 1)))) { |
| 1000 | // a no-op replacement |
| 1001 | i++; |
| 1002 | } else { |
| 1003 | StringBuilder builder = new StringBuilder(len).append(sequence, 0, i).append(replacement); |
| 1004 | return finishCollapseFrom(sequence, i + 1, len, replacement, builder, true); |
| 1005 | } |
| 1006 | } |
| 1007 | } |
| 1008 | // no replacement needed |
| 1009 | return sequence.toString(); |
| 1010 | } |
| 1011 | |
| 1012 | /** |
| 1013 | * Collapses groups of matching characters exactly as {@link #collapseFrom} does, except that |
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