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From Peter Karman <>
Subject Re: [lucy-dev] FieldType: no default properties
Date Mon, 20 Sep 2010 21:20:32 GMT
Marvin Humphrey wrote on 09/18/2010 01:52 PM:

> However, I have come to believe that the advantages of succinctness do not
> outweigh the disadvantages of inconsistency, and that it would be better to
> have all properties default to false.


> Furthermore, by having all properties default to false, we can implement them
> as bit-flags and have the C constructors for FieldType subclasses take a
> "flags" integer which defaults to 0.


> If we change the defaults in Lucy, it will mean a back-compat break with
> KinoSearch.  However, we can minimize the disruption by consolidating 
> FullTextType and StringType into a single, new TextType class.  Then, when
> KinoSearch schema.json files are read and fieldtypes are detected which are
> labeled "fulltext" or "string" instead of the new "text", we can just add the
> flags and invoke TextType's constructor.
> Since numeric types are not public yet in KS, that leaves only BlobType, which
> is rarely used.  My thinking is that it probably makes sense to just break
> back compat for BlobType.


Peter Karman  .  .

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