Duplicate of:
http://stackoverflow.com/questions/15471931/replacing-triples-into-an-op-object-using-arq-jena
Seeing the code you do have would be helpful.
Andy
On 18/03/13 07:27, arpita agrawal wrote:
Hello,
I was searching for a way to replace the triples into the original sql
query.
I found the following in your group....
The algebra part of ARQ also supports the visitor pattern but also a transform
pattern for rewriting one algebra expression into another (transform actually
builds on visitor). Subclass TransformCopy and add your manipulation of BGPs;
use class Tranformer to apply your transform. It's a bottom-up rewrite of the
algebra form. This is the better way to manipulate queries - ARQ uses itself
for some optimizations, and uses the visitor pattern for reference evaluation
and serialization into SSE as in your example.
I used op visitor to visit the Op object and i got into bgp object and accessed
triples. Now i have the original object and the new triples. How to build the
whole Op object ( same as original ) but with replaced triples. YOu have
written that we should do bottom-up rewrite, but can you help me how to proceed
with it ?
Thanks a lot in advance.
Regards,
Arpita Agrawal
