feat(Discovery v1): Discriminator for QueryAggreagation

Author: mediumTaj

src/IBM.Watson.Discovery.v1/Model/Calculation.cs

@@ -23,7 +23,7 @@ namespace IBM.Watson.Discovery.v1.Model
     /// <summary>
     /// Calculation.
     /// </summary>
-    public class Calculation
+    public class Calculation : QueryAggregation
     {
         /// <summary>
         /// The field where the aggregation is located in the document.

src/IBM.Watson.Discovery.v1/Model/Filter.cs

@@ -23,7 +23,7 @@ namespace IBM.Watson.Discovery.v1.Model
     /// <summary>
     /// Filter.
     /// </summary>
-    public class Filter
+    public class Filter : QueryAggregation
     {
         /// <summary>
         /// The match the aggregated results queried for.

src/IBM.Watson.Discovery.v1/Model/Histogram.cs

@@ -23,7 +23,7 @@ namespace IBM.Watson.Discovery.v1.Model
     /// <summary>
     /// Histogram.
     /// </summary>
-    public class Histogram
+    public class Histogram : QueryAggregation
     {
         /// <summary>
         /// The field where the aggregation is located in the document.

src/IBM.Watson.Discovery.v1/Model/Nested.cs

@@ -23,7 +23,7 @@ namespace IBM.Watson.Discovery.v1.Model
     /// <summary>
     /// Nested.
     /// </summary>
-    public class Nested
+    public class Nested : QueryAggregation
     {
         /// <summary>
         /// The area of the results the aggregation was restricted to.

src/IBM.Watson.Discovery.v1/Model/QueryAggregation.cs

@@ -16,13 +16,26 @@
 */
 
 using System.Collections.Generic;
+using JsonSubTypes;
 using Newtonsoft.Json;
 
 namespace IBM.Watson.Discovery.v1.Model
 {
     /// <summary>
     /// An aggregation produced by  Discovery to analyze the input provided.
     /// </summary>
+    [JsonConverter(typeof(JsonSubtypes), "Type")]
+    [JsonSubtypes.KnownSubType(typeof(Histogram), "histogram")]
+    [JsonSubtypes.KnownSubType(typeof(Calculation), "max")]
+    [JsonSubtypes.KnownSubType(typeof(Calculation), "min")]
+    [JsonSubtypes.KnownSubType(typeof(Calculation), "average")]
+    [JsonSubtypes.KnownSubType(typeof(Calculation), "sum")]
+    [JsonSubtypes.KnownSubType(typeof(Calculation), "unique_count")]
+    [JsonSubtypes.KnownSubType(typeof(Term), "term")]
+    [JsonSubtypes.KnownSubType(typeof(Filter), "filter")]
+    [JsonSubtypes.KnownSubType(typeof(Nested), "nested")]
+    [JsonSubtypes.KnownSubType(typeof(Timeslice), "timeslice")]
+    [JsonSubtypes.KnownSubType(typeof(TopHits), "top_hits")]
     public class QueryAggregation
     {
         /// <summary>

src/IBM.Watson.Discovery.v1/Model/Term.cs

@@ -23,7 +23,7 @@ namespace IBM.Watson.Discovery.v1.Model
     /// <summary>
     /// Term.
     /// </summary>
-    public class Term
+    public class Term : QueryAggregation
     {
         /// <summary>
         /// The field where the aggregation is located in the document.

src/IBM.Watson.Discovery.v1/Model/Timeslice.cs

@@ -23,7 +23,7 @@ namespace IBM.Watson.Discovery.v1.Model
     /// <summary>
     /// Timeslice.
     /// </summary>
-    public class Timeslice
+    public class Timeslice : QueryAggregation
     {
         /// <summary>
         /// The field where the aggregation is located in the document.

src/IBM.Watson.Discovery.v1/Model/TopHits.cs

@@ -23,7 +23,7 @@ namespace IBM.Watson.Discovery.v1.Model
     /// <summary>
     /// TopHits.
     /// </summary>
-    public class TopHits
+    public class TopHits : QueryAggregation
     {
         /// <summary>
         /// Number of top hits returned by the aggregation.