use of org.apache.olingo.server.api.serializer.EntityCollectionSerializerOptions in project cxf by apache.
the class DemoEntityCollectionProcessor method readEntityCollection.
// CHECKSTYLE:ON
// the only method that is declared in the EntityCollectionProcessor interface
// this method is called, when the user fires a request to an EntitySet
// in our example, the URL would be:
// http://localhost:8080/ExampleService1/ExampleServlet1.svc/Products
public void readEntityCollection(ODataRequest request, ODataResponse response, UriInfo uriInfo, ContentType responseFormat) throws ODataApplicationException, SerializerException {
// 1st we have retrieve the requested EntitySet from the uriInfo object
// (representation of the parsed service URI)
List<UriResource> resourcePaths = uriInfo.getUriResourceParts();
// In our example, the first segment is the EntitySet
UriResourceEntitySet uriResourceEntitySet = (UriResourceEntitySet) resourcePaths.get(0);
EdmEntitySet edmEntitySet = uriResourceEntitySet.getEntitySet();
// 2nd: fetch the data from backend for this requested EntitySetName
// it has to be delivered as EntitySet object
EntityCollection entitySet = getData(edmEntitySet);
// 3rd: create a serializer based on the requested format (json)
ODataSerializer serializer = odata.createSerializer(responseFormat);
// 4th: Now serialize the content: transform from the EntitySet object to InputStream
EdmEntityType edmEntityType = edmEntitySet.getEntityType();
ContextURL contextUrl = ContextURL.with().entitySet(edmEntitySet).build();
final String id = request.getRawBaseUri() + "/" + edmEntitySet.getName();
EntityCollectionSerializerOptions opts = EntityCollectionSerializerOptions.with().id(id).contextURL(contextUrl).build();
SerializerResult serializedContent = serializer.entityCollection(serviceMetadata, edmEntityType, entitySet, opts);
// Finally: configure the response object: set the body, headers and status code
response.setContent(serializedContent.getContent());
response.setStatusCode(HttpStatusCode.OK.getStatusCode());
response.setHeader(HttpHeader.CONTENT_TYPE, responseFormat.toContentTypeString());
}
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