[ 
https://issues.apache.org/jira/browse/OLINGO-1272?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Aarzoo Aggarwal updated OLINGO-1272:
------------------------------------
    Description: 
We create an entity with A primary key reference.

The request - [http://ip:host/odata/entity?$select=key,col1,|http://iphost/]col2

The same request when tried with select query parameter having columns except 
the primary key like -

[http://ip:host/odata/entity?$select=col1,|http://iphost/]col2 - stops working 
with json format.

Getting the same result works fine with request header set as - 
Accept=application/xml

It gives a null pointer exception with Accept=application/json with following 
trace -

java.lang.NullPointerException: null
 at 
org.apache.olingo.server.core.uri.UriHelperImpl.findPropertyRefValue(UriHelperImpl.java:125)
 at 
org.apache.olingo.server.core.uri.UriHelperImpl.buildKeyPredicate(UriHelperImpl.java:88)
 at 
org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.getEntityId(ODataJsonSerializer.java:334)
 at 
org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntity(ODataJsonSerializer.java:399)
 at 
org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntitySet(ODataJsonSerializer.java:312)
 at 
org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.entityCollection(ODataJsonSerializer.java:198

  was:
We create an entity with A primary key reference. Getting the same result works 
fine with request header set as - Accept=application/xml

It gives a null pointer exception with Accept=application/json with following 
trace -

java.lang.NullPointerException: null
 at 
org.apache.olingo.server.core.uri.UriHelperImpl.findPropertyRefValue(UriHelperImpl.java:125)
 at 
org.apache.olingo.server.core.uri.UriHelperImpl.buildKeyPredicate(UriHelperImpl.java:88)
 at 
org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.getEntityId(ODataJsonSerializer.java:334)
 at 
org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntity(ODataJsonSerializer.java:399)
 at 
org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntitySet(ODataJsonSerializer.java:312)
 at 
org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.entityCollection(ODataJsonSerializer.java:198)

 


> Select without primary key fails with JSON serializer but works fine with XML
> -----------------------------------------------------------------------------
>
>                 Key: OLINGO-1272
>                 URL: https://issues.apache.org/jira/browse/OLINGO-1272
>             Project: Olingo
>          Issue Type: Bug
>          Components: odata2-core, odata4-client, odata4-commons, odata4-server
>    Affects Versions: (Java) V4 4.4.0
>            Reporter: Aarzoo Aggarwal
>            Priority: Major
>
> We create an entity with A primary key reference.
> The request - 
> [http://ip:host/odata/entity?$select=key,col1,|http://iphost/]col2
> The same request when tried with select query parameter having columns except 
> the primary key like -
> [http://ip:host/odata/entity?$select=col1,|http://iphost/]col2 - stops 
> working with json format.
> Getting the same result works fine with request header set as - 
> Accept=application/xml
> It gives a null pointer exception with Accept=application/json with following 
> trace -
> java.lang.NullPointerException: null
>  at 
> org.apache.olingo.server.core.uri.UriHelperImpl.findPropertyRefValue(UriHelperImpl.java:125)
>  at 
> org.apache.olingo.server.core.uri.UriHelperImpl.buildKeyPredicate(UriHelperImpl.java:88)
>  at 
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.getEntityId(ODataJsonSerializer.java:334)
>  at 
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntity(ODataJsonSerializer.java:399)
>  at 
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntitySet(ODataJsonSerializer.java:312)
>  at 
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.entityCollection(ODataJsonSerializer.java:198



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