Examples with SingleResultQuery org.eclipse.persistence.jpa.rs.util.list.SingleResultQuery used on opensource projects

Example 1 with SingleResultQuery

use of org.eclipse.persistence.jpa.rs.util.list.SingleResultQuery in project eclipselink by eclipse-ee4j.

the class AbstractSingleResultQueryResource method namedQuerySingleResultInternal.

/**
 * Named query single result.
 *
 * @param version the version
 * @param persistenceUnit the persistence unit
 * @param queryName the query name
 * @param headers the http headers
 * @param uriInfo the uriInfo
 * @return the response
 */
@SuppressWarnings("rawtypes")
protected Response namedQuerySingleResultInternal(String version, String persistenceUnit, String queryName, HttpHeaders headers, UriInfo uriInfo) {
    JPARSLogger.entering(CLASS_NAME, "namedQuerySingleResultInternal", new Object[] { "GET", version, persistenceUnit, queryName, uriInfo.getRequestUri().toASCIIString() });
    try {
        final PersistenceContext context = getPersistenceContext(persistenceUnit, null, uriInfo.getBaseUri(), version, null);
        final Query query = context.buildQuery(getMatrixParameters(uriInfo, persistenceUnit), queryName, getMatrixParameters(uriInfo, queryName), getQueryParameters(uriInfo));
        final DatabaseQuery dbQuery = ((EJBQueryImpl<?>) query).getDatabaseQuery();
        final FeatureResponseBuilder responseBuilder = context.getSupportedFeatureSet().getResponseBuilder(Feature.NO_PAGING);
        if (dbQuery instanceof ReportQuery) {
            final List<ReportItem> reportItems = ((ReportQuery) dbQuery).getItems();
            final Object queryResults = query.getSingleResult();
            final Object response = responseBuilder.buildSingleResultQueryResponse(context, getQueryParameters(uriInfo), queryResults, reportItems, uriInfo);
            if (response != null && response instanceof SingleResultQuery) {
                final SingleResultQuery singleResultQuery = (SingleResultQuery) response;
                final List<JAXBElement<?>> item = singleResultQuery.getFields();
                if ((item != null) && (item.size() == 1)) {
                    // Fix for Bug 393320 - JPA-RS: Respect the Accept Header for a singleResultQuery
                    // If there is only one item in the select clause and if value of that item is binary, we will create a response with
                    // that binary data without converting its to Base64.
                    JAXBElement element = item.get(0);
                    Object elementValue = element.getValue();
                    if (elementValue instanceof byte[]) {
                        List<MediaType> acceptableMediaTypes = headers.getAcceptableMediaTypes();
                        if (acceptableMediaTypes.contains(MediaType.APPLICATION_OCTET_STREAM_TYPE)) {
                            return Response.ok(new StreamingOutputMarshaller(context, elementValue, headers.getAcceptableMediaTypes())).build();
                        }
                    }
                }
                return Response.ok(new StreamingOutputMarshaller(context, response, headers.getAcceptableMediaTypes())).build();
            } else {
                // something went wrong with the descriptors, return error
                throw JPARSException.responseCouldNotBeBuiltForNamedQueryRequest(queryName, context.getName());
            }
        }
        final Object queryResult = query.getSingleResult();
        return Response.ok(new StreamingOutputMarshaller(context, responseBuilder.buildSingleEntityResponse(context, getQueryParameters(uriInfo), queryResult, uriInfo), headers.getAcceptableMediaTypes())).build();
    } catch (Exception ex) {
        throw JPARSException.exceptionOccurred(ex);
    }
}