OLINGO-911: using json serializer for response purpose, but this will ever be used to just send the 204 in cases of update and delete

lib/server-core-ext/src/main/java/org/apache/olingo/server/core/ServiceRequest.java

@@ -276,6 +276,11 @@ public abstract class ServiceRequest {
     return this.odata.createSerializer(getResponseContentType());
   }
   
+  public ODataSerializer getSerializer(ContentType type) throws ContentNegotiatorException,
+      SerializerException {
+    return this.odata.createSerializer(type);
+  }  
+
   public Map<String, String> getPreferences(){
     HashMap<String, String> map = new HashMap<String, String>();
     List<String> headers = request.getHeaders(HttpHeader.PREFER);

lib/server-core-ext/src/main/java/org/apache/olingo/server/core/responses/PropertyResponse.java

@@ -51,17 +51,24 @@ public class PropertyResponse extends ServiceResponse {
   public static PropertyResponse getInstance(ServiceRequest request, ODataResponse response,
       EdmType edmType, ContextURL contextURL, boolean collection) throws ContentNegotiatorException,
       SerializerException {
+    
+    ContentType type = request.getResponseContentType();
+    ODataSerializer serializer = null;
+    if (type.equals(ContentType.TEXT_PLAIN)) {
+      serializer = request.getSerializer(ContentType.APPLICATION_JSON);
+    } else {
+      serializer = request.getSerializer();
+    }
+    
     if (edmType.getKind() == EdmTypeKind.PRIMITIVE) {
       PrimitiveSerializerOptions options = request.getSerializerOptions(
           PrimitiveSerializerOptions.class, contextURL, false);      
-      ContentType type = request.getResponseContentType();
+      return new PropertyResponse(request.getServiceMetaData(), serializer, response,
-      return new PropertyResponse(request.getServiceMetaData(), request.getSerializer(), response,
           options, type, collection, request.getPreferences());
     }
     ComplexSerializerOptions options = request.getSerializerOptions(ComplexSerializerOptions.class,
         contextURL, false);    
-    ContentType type = request.getResponseContentType();
+    return new PropertyResponse(request.getServiceMetaData(), serializer, response,
-    return new PropertyResponse(request.getServiceMetaData(), request.getSerializer(), response,
         options, type, collection, request.getPreferences());
   }
 

lib/server-core-ext/src/test/java/org/apache/olingo/server/example/TripPinServiceTest.java

@@ -204,6 +204,17 @@ public class TripPinServiceTest {
     assertEquals("American Airlines", IOUtils.toString(response.getEntity().getContent()));
   }
   
+  @Test
+  public void testUpdateRawValue() throws Exception {
+    // Note that in-real services must convert raw value (byte[]) to 
+    // the data type it needs to save in in updateProperty method
+    String editUrl = baseURL + "/Airlines('AF')/Name/$value";
+    HttpPut request = new HttpPut(editUrl);
+    request.setEntity(new StringEntity("Safari"));
+    HttpResponse response = httpSend(request, 204);
+    EntityUtils.consumeQuietly(response.getEntity());
+  }
+  
   @Test @Ignore
   // TODO: Support geometry types to make this run
   public void testReadComplexProperty() throws Exception {