We are currently using Lucene 2.3.2 and want to migrate to 3.4.0 . We have our own custom Tokenizer generated using Java CC which has been in use ever since we started using Lucene and we want to continue with the same behavior. I appreciate pointers to any resources that deal with building a Tokenizer for new TokenStream API from grammar.
UPDATE:
I found the grammar used to generate StandardTokenizer at http://svn.apache.org/viewvc/lucene/java/trunk/src/java/org/apache/lucene/analysis/standard/StandardTokenizerImpl.jflex?view=log&pathrev=692211. Modified grammar to suit to our requirements and generated java code using jflex http://jflex.de/
I found the grammar used to generate StandardTokenizer at http://svn.apache.org/viewvc/lucene/java/trunk/src/java/org/apache/lucene/analysis/standard/StandardTokenizerImpl.jflex?view=log&pathrev=692211. Modified grammar to suit to our requirements and generated java code using jflex http://jflex.de/
来源：https://stackoverflow.com/questions/7846305/generating-a-custom-tokenizer-for-new-tokenstream-api-using-jflex-java-cc