Hi Jody, while the problem of where to hold the debate of this proposal is
resolved, I answer you this email.
The code provides a shapefile and a related CDX-index file. I created it with
FoxPro. There is a test that executes aplhanumeric and spatial queries to
validate the changes.
https://github.com/geotools/geotools/pull/1056/files#diff-f8d5fc3873867d0bed6ca07ccba7c7e1R99
About tools to create dbase-indexes, I tried to respond to Ian in the pull...
https://github.com/geotools/geotools/pull/1056#issuecomment-160000748
Best regardsAlvaro
De: Jody Garnett <[email protected]>
Para: A Huarte <[email protected]>
CC: Andrea Aime <[email protected]>;
"[email protected]" <[email protected]>
Enviado: Jueves 26 de noviembre de 2015 20:16
Asunto: Re: [Geotools-devel] [NEW FEATURE] Implement a pure java Dbase
indexing + full integration of spatial and alphanumeric filters
I guess I should ask if the
ComplexPropertyAccessor/ComplexPropertyAccessorFactory are just internal to the
shapefile datastore implementation - at which point I do not think anyone would
notice/care, or if this is something that would show up in end user
applications.
I would like to ask that your proposal include a code example of how to use /
generate an attribute index. Thus far your proposal as kind of been about the
internals of shapefile datastore.
--Jody Garnett
On 25 November 2015 at 23:44, A Huarte <[email protected]> wrote:
Hi Jody, thanks for your reply!
Don't worry, I am patient :-) I can not imagine how much work
Geoserver/GeoTools team solves.
About this porprosal, I would like to work about second pull. First pull does
not modify the current behavior (alphanumeric and spatial filters are solved
separately as until now) and it only is executed when a dbase-index file exist
(Now, it only supports .CDX files, but .MDX specification is very similar).
Second pull integrates fully the processing of alphanumeric and spatial parts
of a filter. We can solve spatial parts of a filter with other parts whose
results do not share the envelope of the spatial part.
About ComplexPropertyAccessor/ComplexPropertyAccessorFactory classes, sorry, I
did not find other generic mechanism to provide attributes to a filter without
to have a SimpleFeature object. When the dbase-index is evaluated we only have
a key-value attribute collection. These new classes are generic and IMHO them
would be useful for other purposes, but if you recommend other option then I
change it.
Best regardsAlvaro
De: Jody Garnett <[email protected]>
Para: A Huarte <[email protected]>
CC: Andrea Aime <[email protected]>;
"[email protected]" <[email protected]>
Enviado: Jueves 26 de noviembre de 2015 5:05
Asunto: Re: [Geotools-devel] [NEW FEATURE] Implement a pure java Dbase
indexing + full integration of spatial and alphanumeric filters
I think you are stuck waiting, Andrea has been a champ reviewing pull requests
while many other members of our team have been busy.
I have some time to work on GeoTools, before I can review your two pull
requests we need to ask the project steering committee to review your proposal:
*
https://github.com/geotools/geotools/wiki/Implement-a-pure-java-Dbase-indexing-to-optimize-shapefile-access
This is really interesting functionality, an attribute based index has been a
long standing feature request for our shapefile datastore.
Out of the two pull requests you are proposing which one do you like? I also
got a bit lost in your proposal when you started mentioning
ComplexPropertyAccessor and ComplexPropertyAccessorFactory?
--Jody Garnett
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