Could anyone please provide sample OSLC code with a where clause for the service class?

The code that i have tried, but it is not giving records on basis of filter where condition.


@GET
@Produces({OslcMediaType.APPLICATION_RDF_XML, OslcMediaType.APPLICATION_XML, OslcMediaType.APPLICATION_JSON})
public Project[] getChangeRequests(@QueryParam("oslc.where") final String where,
                    @QueryParam("oslc.prefix") final String prefix)
{    
    final List< Project> results = new ArrayList<Project>();          
    Map<String, String> prefixMap;
    try
    {     
        QueryUtils.parseSearchTerms(where);
        prefixMap = QueryUtils.parsePrefixes(prefix);   
        WhereClause whereClause = QueryUtils.parseWhere(where, prefixMap);

    }
    catch (ParseException e)
    {
       e.printStackTrace();
    }

    final Project[] changeRequests = Persistence.getChangeRequestsForProject();
    for (final Project changeRequest : changeRequests)
    {
        changeRequest.setServiceProvider(ServiceProviderSingleton.getServiceProviderURI());
        results.add(changeRequest);
    }
    return results.toArray(new Project[results.size()]);
}