Add support for the graph API that is part of xpack

Include GraphExploreControls in integration test

Remove JsonProperty attributes from GraphExploreControls

Conflicts:
	src/Nest/Nest.csproj
	src/Nest/_Generated/_Descriptors.generated.cs
	src/Nest/_Generated/_Requests.generated.cs
	src/Tests/Tests.csproj
	src/Tests/tests.yaml

Author: Mpdreamz

src/CodeGeneration/CodeGeneration.LowLevelClient/Program.cs

@@ -28,7 +28,7 @@ static void Main(string[] args)
 			if (redownloadCoreSpecification)
 				RestSpecDownloader.Download(downloadBranch);
 
-			ApiGenerator.Generate("Core", "DeleteByQuery");
+			ApiGenerator.Generate("Core", "DeleteByQuery", "Graph");
 			//ApiGenerator.Generate("Core", "Graph", "License");
 			//ApiGenerator.Generate(); //generates everything under ApiSpecification
 		}

src/CodeGeneration/CodeGeneration.LowLevelClient/RestSpecification/XPack/Graph/graph.explore.json

@@ -7,8 +7,9 @@
       "paths": ["/{index}/_graph/explore", "/{index}/{type}/_graph/explore"],   
       "parts" : {
         "index": {
-         "type" : "list",
-         "description" : "A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices"
+          "required" : true,
+          "type": "list",
+          "description": "A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices"
         },
         "type": {
           "type" : "list",

src/Elasticsearch.Net/Domain/RequestParameters/RequestParameters.Generated.cs

@@ -4519,4 +4519,30 @@ public class DeleteByQueryRequestParameters : FluentRequestParameters<DeleteByQu
 		public DeleteByQueryRequestParameters FilterPath(string filter_path) => this.AddQueryString("filter_path", filter_path);
 
 	}
+	
+	///<summary>Request parameters descriptor for GraphExplore
+	///<pre>
+	///https://www.elastic.co/guide/en/graph/current/explore.html
+	///</pre>
+	///</summary>
+	public class GraphExploreRequestParameters : FluentRequestParameters<GraphExploreRequestParameters> 
+	{
+		public override HttpMethod DefaultHttpMethod => HttpMethod.POST;
+		
+		///<summary>Specific routing value</summary>
+		public GraphExploreRequestParameters Routing(string routing) => this.AddQueryString("routing", routing);
+		
+		
+		///<summary>Explicit operation timeout</summary>
+		public GraphExploreRequestParameters Timeout(TimeSpan timeout) => this.AddQueryString("timeout", timeout.ToTimeUnit());
+		
+		
+		///<summary>The URL-encoded request definition</summary>
+		public GraphExploreRequestParameters Source(string source) => this.AddQueryString("source", source);
+		
+		
+		///<summary>Comma separated list of filters used to reduce the response returned by Elasticsearch</summary>
+		public GraphExploreRequestParameters FilterPath(string filter_path) => this.AddQueryString("filter_path", filter_path);
+		
+	}
 }

src/Elasticsearch.Net/ElasticLowLevelClient.Generated.cs

@@ -7751,6 +7751,126 @@ public ElasticsearchResponse<T> DeleteByQuery<T>(string index, string type, Post
 		public Task<ElasticsearchResponse<T>> DeleteByQueryAsync<T>(string index, string type, PostData<object> body, Func<DeleteByQueryRequestParameters, DeleteByQueryRequestParameters> requestParameters = null)
 			where T : class => this.DoRequestAsync<T>(DELETE, Url($"{index.NotNull("index")}/{type.NotNull("type")}/_query"), body, _params(requestParameters));
 
+		///<summary>Represents a GET on /{index}/_graph/explore 
+		///<para></para>Returns: ElasticsearchResponse&lt;T&gt; where the behavior depends on the type of T:
+		///<para> - T, an object you own that the elasticsearch response will be deserialized to </para>
+		///<para> - byte[], no deserialization, but the response stream will be closed </para>
+		///<para> - Stream, no deserialization, response stream is your responsibility </para>
+		///<para> - VoidResponse, no deserialization, response stream never read and closed </para>
+		///<para> - DynamicDictionary, a dynamic aware dictionary that can be safely traversed to any depth </para> 
+	    ///<para>See also: https://www.elastic.co/guide/en/graph/current/explore.html </para>	
+	    ///</summary>
+		///<param name="index">A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices</param>
+		///<param name="requestParameters">A func that allows you to describe the querystring parameters &amp; request specific connection settings.</param>
+		public ElasticsearchResponse<T> GraphExploreGet<T>(string index, Func<GraphExploreRequestParameters, GraphExploreRequestParameters> requestParameters = null)
+			where T : class => this.DoRequest<T>(GET, Url($"{index.NotNull("index")}/_graph/explore"), null, _params(requestParameters));
+		
+		///<summary>Represents a GET on /{index}/_graph/explore 
+		///<para></para>Returns: A task of ElasticsearchResponse&lt;T&gt; where the behaviour depends on the type of T:
+		///<para> - T, an object you own that the elasticsearch response will be deserialized to </para>
+		///<para> - byte[], no deserialization, but the response stream will be closed </para>
+		///<para> - Stream, no deserialization, response stream is your responsibility </para>
+		///<para> - VoidResponse, no deserialization, response stream never read and closed </para>
+		///<para> - DynamicDictionary, a dynamic aware dictionary that can be safely traversed to any depth </para> 
+	    ///<para>See also: https://www.elastic.co/guide/en/graph/current/explore.html </para>	
+	    ///</summary>
+		///<param name="index">A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices</param>
+		///<param name="requestParameters">A func that allows you to describe the querystring parameters &amp; request specific connection settings.</param>
+		public Task<ElasticsearchResponse<T>> GraphExploreGetAsync<T>(string index, Func<GraphExploreRequestParameters, GraphExploreRequestParameters> requestParameters = null)
+			where T : class => this.DoRequestAsync<T>(GET, Url($"{index.NotNull("index")}/_graph/explore"), null, _params(requestParameters));
+		
+		///<summary>Represents a GET on /{index}/{type}/_graph/explore 
+		///<para></para>Returns: ElasticsearchResponse&lt;T&gt; where the behavior depends on the type of T:
+		///<para> - T, an object you own that the elasticsearch response will be deserialized to </para>
+		///<para> - byte[], no deserialization, but the response stream will be closed </para>
+		///<para> - Stream, no deserialization, response stream is your responsibility </para>
+		///<para> - VoidResponse, no deserialization, response stream never read and closed </para>
+		///<para> - DynamicDictionary, a dynamic aware dictionary that can be safely traversed to any depth </para> 
+	    ///<para>See also: https://www.elastic.co/guide/en/graph/current/explore.html </para>	
+	    ///</summary>
+		///<param name="index">A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices</param>
+		///<param name="type">A comma-separated list of document types to search; leave empty to perform the operation on all types</param>
+		///<param name="requestParameters">A func that allows you to describe the querystring parameters &amp; request specific connection settings.</param>
+		public ElasticsearchResponse<T> GraphExploreGet<T>(string index, string type, Func<GraphExploreRequestParameters, GraphExploreRequestParameters> requestParameters = null)
+			where T : class => this.DoRequest<T>(GET, Url($"{index.NotNull("index")}/{type.NotNull("type")}/_graph/explore"), null, _params(requestParameters));
+		
+		///<summary>Represents a GET on /{index}/{type}/_graph/explore 
+		///<para></para>Returns: A task of ElasticsearchResponse&lt;T&gt; where the behaviour depends on the type of T:
+		///<para> - T, an object you own that the elasticsearch response will be deserialized to </para>
+		///<para> - byte[], no deserialization, but the response stream will be closed </para>
+		///<para> - Stream, no deserialization, response stream is your responsibility </para>
+		///<para> - VoidResponse, no deserialization, response stream never read and closed </para>
+		///<para> - DynamicDictionary, a dynamic aware dictionary that can be safely traversed to any depth </para> 
+	    ///<para>See also: https://www.elastic.co/guide/en/graph/current/explore.html </para>	
+	    ///</summary>
+		///<param name="index">A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices</param>
+		///<param name="type">A comma-separated list of document types to search; leave empty to perform the operation on all types</param>
+		///<param name="requestParameters">A func that allows you to describe the querystring parameters &amp; request specific connection settings.</param>
+		public Task<ElasticsearchResponse<T>> GraphExploreGetAsync<T>(string index, string type, Func<GraphExploreRequestParameters, GraphExploreRequestParameters> requestParameters = null)
+			where T : class => this.DoRequestAsync<T>(GET, Url($"{index.NotNull("index")}/{type.NotNull("type")}/_graph/explore"), null, _params(requestParameters));
+		
+		///<summary>Represents a POST on /{index}/_graph/explore 
+		///<para></para>Returns: ElasticsearchResponse&lt;T&gt; where the behavior depends on the type of T:
+		///<para> - T, an object you own that the elasticsearch response will be deserialized to </para>
+		///<para> - byte[], no deserialization, but the response stream will be closed </para>
+		///<para> - Stream, no deserialization, response stream is your responsibility </para>
+		///<para> - VoidResponse, no deserialization, response stream never read and closed </para>
+		///<para> - DynamicDictionary, a dynamic aware dictionary that can be safely traversed to any depth </para> 
+	    ///<para>See also: https://www.elastic.co/guide/en/graph/current/explore.html </para>	
+	    ///</summary>
+		///<param name="index">A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices</param>
+		///<param name="body">Graph Query DSL</param>
+		///<param name="requestParameters">A func that allows you to describe the querystring parameters &amp; request specific connection settings.</param>
+		public ElasticsearchResponse<T> GraphExplore<T>(string index, PostData<object> body, Func<GraphExploreRequestParameters, GraphExploreRequestParameters> requestParameters = null)
+			where T : class => this.DoRequest<T>(POST, Url($"{index.NotNull("index")}/_graph/explore"), body, _params(requestParameters));
+		
+		///<summary>Represents a POST on /{index}/_graph/explore 
+		///<para></para>Returns: A task of ElasticsearchResponse&lt;T&gt; where the behaviour depends on the type of T:
+		///<para> - T, an object you own that the elasticsearch response will be deserialized to </para>
+		///<para> - byte[], no deserialization, but the response stream will be closed </para>
+		///<para> - Stream, no deserialization, response stream is your responsibility </para>
+		///<para> - VoidResponse, no deserialization, response stream never read and closed </para>
+		///<para> - DynamicDictionary, a dynamic aware dictionary that can be safely traversed to any depth </para> 
+	    ///<para>See also: https://www.elastic.co/guide/en/graph/current/explore.html </para>	
+	    ///</summary>
+		///<param name="index">A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices</param>
+		///<param name="body">Graph Query DSL</param>
+		///<param name="requestParameters">A func that allows you to describe the querystring parameters &amp; request specific connection settings.</param>
+		public Task<ElasticsearchResponse<T>> GraphExploreAsync<T>(string index, PostData<object> body, Func<GraphExploreRequestParameters, GraphExploreRequestParameters> requestParameters = null)
+			where T : class => this.DoRequestAsync<T>(POST, Url($"{index.NotNull("index")}/_graph/explore"), body, _params(requestParameters));
+		
+		///<summary>Represents a POST on /{index}/{type}/_graph/explore 
+		///<para></para>Returns: ElasticsearchResponse&lt;T&gt; where the behavior depends on the type of T:
+		///<para> - T, an object you own that the elasticsearch response will be deserialized to </para>
+		///<para> - byte[], no deserialization, but the response stream will be closed </para>
+		///<para> - Stream, no deserialization, response stream is your responsibility </para>
+		///<para> - VoidResponse, no deserialization, response stream never read and closed </para>
+		///<para> - DynamicDictionary, a dynamic aware dictionary that can be safely traversed to any depth </para> 
+	    ///<para>See also: https://www.elastic.co/guide/en/graph/current/explore.html </para>	
+	    ///</summary>
+		///<param name="index">A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices</param>
+		///<param name="type">A comma-separated list of document types to search; leave empty to perform the operation on all types</param>
+		///<param name="body">Graph Query DSL</param>
+		///<param name="requestParameters">A func that allows you to describe the querystring parameters &amp; request specific connection settings.</param>
+		public ElasticsearchResponse<T> GraphExplore<T>(string index, string type, PostData<object> body, Func<GraphExploreRequestParameters, GraphExploreRequestParameters> requestParameters = null)
+			where T : class => this.DoRequest<T>(POST, Url($"{index.NotNull("index")}/{type.NotNull("type")}/_graph/explore"), body, _params(requestParameters));
+		
+		///<summary>Represents a POST on /{index}/{type}/_graph/explore 
+		///<para></para>Returns: A task of ElasticsearchResponse&lt;T&gt; where the behaviour depends on the type of T:
+		///<para> - T, an object you own that the elasticsearch response will be deserialized to </para>
+		///<para> - byte[], no deserialization, but the response stream will be closed </para>
+		///<para> - Stream, no deserialization, response stream is your responsibility </para>
+		///<para> - VoidResponse, no deserialization, response stream never read and closed </para>
+		///<para> - DynamicDictionary, a dynamic aware dictionary that can be safely traversed to any depth </para> 
+	    ///<para>See also: https://www.elastic.co/guide/en/graph/current/explore.html </para>	
+	    ///</summary>
+		///<param name="index">A comma-separated list of index names to search; use `_all` or empty string to perform the operation on all indices</param>
+		///<param name="type">A comma-separated list of document types to search; leave empty to perform the operation on all types</param>
+		///<param name="body">Graph Query DSL</param>
+		///<param name="requestParameters">A func that allows you to describe the querystring parameters &amp; request specific connection settings.</param>
+		public Task<ElasticsearchResponse<T>> GraphExploreAsync<T>(string index, string type, PostData<object> body, Func<GraphExploreRequestParameters, GraphExploreRequestParameters> requestParameters = null)
+			where T : class => this.DoRequestAsync<T>(POST, Url($"{index.NotNull("index")}/{type.NotNull("type")}/_graph/explore"), body, _params(requestParameters));
+		
 
 	  }
 	  }