How to store object relationships in Lucene?

What is the best way to store the object relationships in lucene? I need to be able to read them back easily and fast. Currently the开发者_StackOverflow中文版y are not stored in the lucene index and reading them from DB is slow.

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Your best bet is probably to add all of the objects that you wish to reference in a large hashtable / dictionary and store the object key in the Lucene index.

(I may have used some .Net specific terminology there, but I assume that the same concept can be applied to whatever language you are using)