In case anyone is curious, I think CHM disallows null values so that putIfAbsent() can work efficiently. Hashtable's restriction is probably just because it was written 11 years ago :-)
From: tc-dev-boun...@lists.terracotta.org [mailto:tc-dev-boun...@lists.terracotta.org] On Behalf Of Tim Eck Sent: Saturday, January 31, 2009 10:21 AM To: tc-dev@lists.terracotta.org Subject: Re: [tc-dev] Why are null values illegal in ConcurrentStringMap? CHM and Hashtable don't allow null values either :-) From: tc-dev-boun...@lists.terracotta.org [mailto:tc-dev-boun...@lists.terracotta.org] On Behalf Of Steven Harris Sent: Saturday, January 31, 2009 10:15 AM To: tc-dev@lists.terracotta.org Subject: Re: [tc-dev] Why are null values illegal in ConcurrentStringMap? That would be simple but I'm not talking about keys I'm talking about values :-) Cheers, Steve Harris <http://www.miketec.org/serendipity/index.php?/archives/7-Oracle-and-Postg res-Redux.html> "Terracotta. It's ten pounds of awesome in a five pound sack." On Jan 31, 2009, at 11:40 PM, Geert Bevin wrote: Very simply, neither Hashtable nor ConcurrentHashMap allow null keys and the first one is backing the DSO version of CSM and the second one the non DSO version. Take care, Geert On 31 Jan 2009, at 15:33, Steven Harris wrote: Just curious. Clearly an explicitly decision, probably a good reason but I don't recall what it is? Cheers, Steve Harris "Terracotta. It's ten pounds of awesome in a five pound sack." _______________________________________________ tc-dev mailing list tc-dev@lists.terracotta.org http://lists.terracotta.org/mailman/listinfo/tc-dev -- Geert Bevin Terracotta - http://www.terracotta.org Uwyn "Use what you need" - http://uwyn.com RIFE Java application framework - http://rifers.org Flytecase Band - http://flytecase.be Music and words - http://gbevin.com _______________________________________________ tc-dev mailing list tc-dev@lists.terracotta.org http://lists.terracotta.org/mailman/listinfo/tc-dev
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