need to clarify/change D&Penum api for hasPayload/getPayload
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Key: LUCENE-3259
URL: https://issues.apache.org/jira/browse/LUCENE-3259
Project: Lucene - Java
Issue Type: Bug
Reporter: Robert Muir
We encountered this bug while integrating the faceting module:
* D&PEnum says getPayload() will return null if there is no payload.
* however, in some cases this is not what happens.
* things do work (with no exceptions), if you always check hasPayload() first.
The easiest fix could be to correct the javadocs, and say that you should
always check hasPayload() first... otherwise getPayload() is not defined.
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