[jira] [Commented] (OLINGO-811) Use of $count for expanded items does not work

["Riccardo Mariani (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/OLINGO-811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14987852#comment-14987852 ] 

Riccardo Mariani commented on OLINGO-811:
-----------------------------------------

A possible solution:
{code:title=ODataJsonSerializer.java|borderStyle=solid}
protected void writeExpandedNavigationProperty(final ServiceMetadata metadata, final EdmNavigationProperty property,
      final Link navigationLink, final ExpandOption innerExpand, final SelectOption innerSelect, final CountOption innerCount,
      final JsonGenerator json) throws IOException, SerializerException {
    json.writeFieldName(property.getName());
    if (property.isCollection()) {
      if (navigationLink == null || navigationLink.getInlineEntitySet() == null) {
        json.writeStartArray();
        json.writeEndArray();
      } else {

if (innerCount != null && innerCount.getCount() != null) {
        writeCount(navigationLink.getInlineEntitySet(), json);
      }

        writeEntitySet(metadata, property.getType(), navigationLink.getInlineEntitySet(), innerExpand,
            innerSelect, false, json);
      }
    } else {
      if (navigationLink == null || navigationLink.getInlineEntity() == null) {
        json.writeNull();
      } else {
        writeEntity(metadata, property.getType(), navigationLink.getInlineEntity(), null,
            innerExpand, innerSelect, false, json);
      }
    }
  }
{code}

> Use of $count for expanded items does not work
> ----------------------------------------------
>
>                 Key: OLINGO-811
>                 URL: https://issues.apache.org/jira/browse/OLINGO-811
>             Project: Olingo
>          Issue Type: Bug
>          Components: odata4-server
>    Affects Versions: (Java) V4 4.0.0
>            Reporter: Michael Bolz
>
> The {{$count}} query option within the {{$expand}} clause does not work correctly (see in [Specification|http://docs.oasis-open.org/odata/odata/v4.0/errata02/os/complete/part1-protocol/odata-v4.0-errata02-os-part1-protocol-complete.html#_The_$inlinecount_System]
> Example URL (for *TecSvc*):
> http://localhost:8080/odata.svc/ESAllPrim/?$expand=NavPropertyETTwoPrimMany($count=true)&$format=json&$count=true
> And example for OData-TripPin Service:
> [http://services.odata.org/V4/(S(kb3m31znaqv0xd4oqq0esxfv))/TripPinServiceRW/People?$expand=Trips($count=true)]



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