What steps will reproduce the problem? 1. Create a BrowseRequest with a MatchAllDocsQuery type query 2. convert the BrowseRequest into a BrowseRequestBPO.Request 3. convert the resulting BrowseRequestBPO.Request back to a BrowseRequest

We should expect to get a BrowseRequest back with MatchAllDocsQuery. But we get back a BrowseRequest with a TermQuery.

The information loss is not restricted to just MatchAllDocsQuery.

Conversion using Query.toString does not work for MatchAllDocsQuery from lucene, whose toString() method returns "MatchAllDocsQuery" instead of the query string ":", which can be parsed. The fact that MatchAllDocsQuery class does not override toString() method should be considered a defect in Lucene 2.4.

Using QueryParser to parse a query string may change the class type of the Query that we start from. For example, a WildCardQuery of "xx*" will be parsed into a PrefixQuery, which is quite appropriate.