| /* GENERATED SOURCE. DO NOT MODIFY. */ |
| /* |
| ******************************************************************************* |
| * Copyright (C) 1996-2016, International Business Machines Corporation and * |
| * others. All Rights Reserved. * |
| ******************************************************************************* |
| */ |
| package android.icu.text; |
| |
| /** |
| * <code>UnicodeFilter</code> defines a protocol for selecting a |
| * subset of the full range (U+0000 to U+FFFF) of Unicode characters. |
| */ |
| @SuppressWarnings("javadoc") // com.imb.icu.text.Transliterator is in another project |
| public abstract class UnicodeFilter implements UnicodeMatcher { |
| |
| /** |
| * Returns <tt>true</tt> for characters that are in the selected |
| * subset. In other words, if a character is <b>to be |
| * filtered</b>, then <tt>contains()</tt> returns |
| * <b><tt>false</tt></b>. |
| */ |
| public abstract boolean contains(int c); |
| |
| /** |
| * Default implementation of UnicodeMatcher::matches() for Unicode |
| * filters. Matches a single 16-bit code unit at offset. |
| */ |
| public int matches(Replaceable text, |
| int[] offset, |
| int limit, |
| boolean incremental) { |
| int c; |
| if (offset[0] < limit && |
| contains(c = text.char32At(offset[0]))) { |
| offset[0] += UTF16.getCharCount(c); |
| return U_MATCH; |
| } |
| if (offset[0] > limit && contains(text.char32At(offset[0]))) { |
| // Backup offset by 1, unless the preceding character is a |
| // surrogate pair -- then backup by 2 (keep offset pointing at |
| // the lead surrogate). |
| --offset[0]; |
| if (offset[0] >= 0) { |
| offset[0] -= UTF16.getCharCount(text.char32At(offset[0])) - 1; |
| } |
| return U_MATCH; |
| } |
| if (incremental && offset[0] == limit) { |
| return U_PARTIAL_MATCH; |
| } |
| return U_MISMATCH; |
| } |
| |
| // TODO Remove this when the JDK property implements MemberDoc.isSynthetic |
| /** |
| * (This should not be here; it is declared to make CheckTags |
| * happy. Java inserts a synthetic constructor and CheckTags |
| * can't tell that it's synthetic.) |
| * |
| * @deprecated This API is ICU internal only. |
| * @hide original deprecated declaration |
| * @hide draft / provisional / internal are hidden on Android |
| */ |
| @Deprecated |
| protected UnicodeFilter() {} |
| } |
