[jira] [Created] (OLINGO-1120) Is grouping in $filter with "(" and ")" possible?

["Werner Mueller (JIRA)" <ji...@apache.org>]

Werner Mueller created OLINGO-1120:
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             Summary: Is grouping in $filter with  "(" and ")" possible?
                 Key: OLINGO-1120
                 URL: https://issues.apache.org/jira/browse/OLINGO-1120
             Project: Olingo
          Issue Type: Question
          Components: odata4-server
    Affects Versions: (Java) V4 4.3.0
            Reporter: Werner Mueller


I'm implementing an OData-server-application with Version v4.3.0 of 
Olingo.

According to  
https://olingo.apache.org/doc/odata4/tutorials/sqo_f/tutorial_sqo_f.html I 
created an ExpressionVisitor 
to construct a valid JDBC/SQL-where constraint.

I had a look to 
https://olingo.apache.org/doc/odata2/tutorials/Olingo_Tutorial_AdvancedRead_FilterVisitor.html
also.

My problem is with grouping. 

OData states that the Operators "(" and ")" should have the highest precedence (5.1.1.9 Operator Precedence, 
http://docs.oasis-open.org/odata/odata/v4.0/os/part2-url-conventions/odata-v4.0-os-part2-url-conventions.html)

How can I handle grouping with the ExpressionVisitor?

These are my urls for testing:
http://localhost:8080/Odata.svc/SomeEnittySet?$filter=(id gt 5 or shortName ne 'xxx' or name eq 'test') or (name eq 'xxx' and id lt 567)

and 

http://localhost:8080/Odata.svc/SomeEnittySet?$filter=(id gt 5 or  shortName ne 'xxx' or name eq 'test') or name eq 'xxx' and id lt 567




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