Examples with SerializerResult org.apache.olingo.server.api.serializer.SerializerResult used on opensource projects

Example 1 with SerializerResult

use of org.apache.olingo.server.api.serializer.SerializerResult 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());
}