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From "Geert Graat (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OLINGO-1145) How to create a valid URI with a date(time) literal using the FilterArgFactory?
Date Tue, 04 Jul 2017 09:27:00 GMT

     [ https://issues.apache.org/jira/browse/OLINGO-1145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Geert Graat updated OLINGO-1145:
    Component/s: odata4-client

> 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
>          Components: odata4-client
>    Affects Versions: (Java) V4 4.3.0
>            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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