convert worddelimiterfilter to new tokenstream API
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Key: SOLR-1710
URL: https://issues.apache.org/jira/browse/SOLR-1710
Project: Solr
Issue Type: Improvement
Components: Schema and Analysis
Reporter: Robert Muir
This one was a doozy, attached is a patch to convert it to the new tokenstream
API.
Some of the logic was split into WordDelimiterIterator (exposes a
BreakIterator-like api for iterating subwords)
the filter is much more efficient now, no cloning.
before applying the patch, rename the existing WordDelimiterFilter to
OriginalWordDelimiterFilter
the patch includes a testcase (TestWordDelimiterBWComp) which generates random
strings from various subword combinations.
For each random string, it compares output against the existing
WordDelimiterFilter for all 512 combinations of boolean parameters.
NOTE: due to bugs found (SOLR-1706), this currently only tests 256 of these
combinations. The bugs discovered in SOLR-1706 are fixed here.
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