Github user NightOwl888 commented on the issue:
https://github.com/apache/lucenenet/pull/191
@conniey
I have nearly finished Highlighter on this branch
https://github.com/NightOwl888/lucenenet/tree/netcoremigration-highlighter
There is still 1 failing test (that doesn't appear to be related to
BreakIterator). I was able to make [hacky solutions for the first 3
issues](https://github.com/NightOwl888/lucenenet/blob/netcoremigration-highlighter/src/Lucene.Net.Highlighter/IcuBreakIterator.cs#L289-L306)
I mentioned
[above](https://github.com/apache/lucenenet/pull/191#issuecomment-266510336),
but after the link you provided I am convinced that none of them will suffice
for production, and we will need a `RuleBasedBreakIterator` to be sure we have
all of the breaking rules setup correctly for international support.
You can pull this now if you wish - let me know if you need me to work on
that failing test.
icu-dotnet
----
Some classes that I have already ported that you may wish to migrate into
icu-dotnet:
-
[BreakIterator](https://github.com/NightOwl888/lucenenet/blob/netcoremigration-highlighter/src/Lucene.Net.Core/Support/BreakIterator.cs)
- Note that is one change from the original - the Text property returns
string instead of CharacterIterator. In hindsight, this change may not have
been necessary.
-
[CharacterIterator](https://github.com/NightOwl888/lucenenet/blob/netcoremigration-highlighter/src/Lucene.Net.Core/Support/CharacterIterator.cs)
- a GetTextAsString() method was added primarily so we can get the text to
pass on to icu-dotnet, and the documentation hasn't yet been migrated from Java.
-
[StringCharacterIterator](https://github.com/NightOwl888/lucenenet/blob/netcoremigration-highlighter/src/Lucene.Net.Core/Support/StringCharacterIterator.cs)
- Exactly like Java (but documentation not yet migrated).
-
[IcuBreakIterator](https://github.com/NightOwl888/lucenenet/blob/netcoremigration-highlighter/src/Lucene.Net.Highlighter/IcuBreakIterator.cs)
- If you remove the hacks I put in to emulate the RuleBasedBreakIterator, it
would probably be a useful addition to icu-dotnet.
-
[TestBreakIterator](https://github.com/NightOwl888/lucenenet/blob/netcoremigration-highlighter/src/Lucene.Net.Tests.Highlighter/TestBreakIterator.cs)
- A partial set of tests that verify the sentence and word breaking
RuleBasedBreakIterator rules.
Note that CharacterIterator is a dependency of
[CharArrayIterator](https://github.com/NightOwl888/lucenenet/blob/netcoremigration-highlighter/src/Lucene.Net.Analysis.Common/Analysis/Util/CharArrayIterator.cs),
but since that is in Analysis.Common (which already depends on icu-dotnet), we
can completely remove all of these classes from Lucene.Net once the
functionality is available in icu-dotnet.
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