EmptyTermSpans.toString() not overridden - throws NPE
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Key: LUCENE-2752
URL: https://issues.apache.org/jira/browse/LUCENE-2752
Project: Lucene - Java
Issue Type: Bug
Components: Search
Environment: Ubuntu 10.10, solr/lucene revision 1033666.
Reporter: Sean O'Connor
Priority: Minor
While trying to use lucene SpanQuery (e.g. SpanTermQuery) in a solr
QueryComponent.process(), I got a NPE on the EmptySpanTerms.toString() method.
I assume this should be overridden, with something, but not sure what. I just
override and return "empty spans", but would assume something better should go
there (empty string, null,...).
Interestingly, the error did not bubble up, so I spent a while thinking I had
bad queries or test content. Queries just came back blank. After digging a bit,
I noticed the 'embedded' error, and tracked down the source. With an overridden
EST.toString() my span queries worked again. I have no idea what else depends
on EST, or if overriding the toString() will cascade problems. 'ant test' in
the lucene branch seemed to pass all tests (Build Successful).
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