Multimap in Hibernate

Question

I need a collection that stores entries as key-value pairs (so I can look up values by a key), but I need one that allows multiple values to share the same key using hibernate

score 11 · Answer 1 · edited Oct 25 '22 at 08:18

11

A map with multiple values for one key is known as a multimap - there's an implementation in the Apache commons library. Hibernate does not support this kind of collection directly, but it can be extended to do so relatively easily by implementing the UserCollectionType interface. This blog article describes how to do it in detail.

edited Oct 25 '22 at 08:18

Timon

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answered Jan 24 '09 at 11:59

Michael Borgwardt

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cool answered my question here: http://stackoverflow.com/questions/545047/hibernate-collections-of-collections – Pat Feb 13 '09 at 19:45
The link is dead. – Vsevolod Golovanov May 16 '18 at 19:43

score -1 · Answer 2 · edited Jan 12 '11 at 16:06

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There is a multimap over on google collections. I don't know if they are hibernate compatible though.

edited Jan 12 '11 at 16:06

Kev

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answered Jul 14 '09 at 22:42

krumpi

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score -1 · Answer 3 · edited Jan 24 '11 at 19:37

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I have also found something relevent

http://commons.apache.org/collections/api-3.1/org/apache/commons/collections/MultiMap.html#get(java.lang.Object)

So can prefer this also.

edited Jan 24 '11 at 19:37

Kev

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answered Jan 24 '09 at 13:00

vyom

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Multimap in Hibernate

3 Answers3

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