Geert Graat created OLINGO-1145:
-----------------------------------
Summary: How to create a valid URI with a date(time) literal using
the FilterArgFactory?
Key: OLINGO-1145
URL: https://issues.apache.org/jira/browse/OLINGO-1145
Project: Olingo
Issue Type: Question
Reporter: Geert Graat
Hi,
We use the Olingo client library to call an OData service (which also uses the
Olingo library). We are implementing filtering using the {{FilterFactory}} and
{{FilterArgFactory}}. We want to filter on a property that is of type
{{Edm.Date}} (and also {{Edm.DateTimeOffset}}), for instance for a date that
equals 2017-07-04, e.g.
{code}
$filter=date eq 2017-07-04
{code}
Note that we do not use the {{date()}} function, is this is not implemented in
the OData service that we call. That being said, the {{date()}} function also
needs a {{FilterArg}}, so it has the same problem.
The problem is that we cannot find how to use the {{FilterArgFactory}} to
create such a valid date literal. If we use the {{literal()}} method, the date
value is surrounded with quotes, leading the OData service to interpret the
value as a String which is inconsistent with our model, so it fails. We need to
create a {{FilterArg}} with the date literal as a String value, without quotes.
The only way to achieve this is to "disguise" it as a property, like the code
below. That works, but it is clearly not the way it should be in the end.
{code}
FilterFactory filterFactory = new FilterFactoryImpl();
Date dateValue = <a valid date>;
String dateString = EdmDate.getInstance().valueToString(dateValue, null, null,
null, null, null);
return filterFactory.getArgFactory().property(dateString);
{code}
Can you show an example how this should be done?
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