[Java] Added Play! WS filters support for retrofit2 client (#6499)

* added play! ws filters support

* samples updated

Author: lukoyanov

modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/play25/Play25CallFactory.mustache

@@ -6,6 +6,7 @@ import okio.BufferedSource;
 import play.libs.ws.WSClient;
 import play.libs.ws.WSRequest;
 import play.libs.ws.WSResponse;
+import play.libs.ws.WSRequestFilter;
 
 import java.io.IOException;
 import java.net.MalformedURLException;
@@ -31,11 +32,19 @@ public class Play25CallFactory implements okhttp3.Call.Factory {
 
     /** Extra query parameters to add to request */
     private List<Pair> extraQueryParams = new ArrayList<>();
+    
+    /** Filters (interceptors) */
+    private List<WSRequestFilter> filters = new ArrayList<>();
 
     public Play25CallFactory(WSClient wsClient) {
         this.wsClient = wsClient;
     }
 
+    public Play25CallFactory(WSClient wsClient, List<WSRequestFilter> filters) {
+        this.wsClient = wsClient;
+        this.filters.addAll(filters);
+    }
+
     public Play25CallFactory(WSClient wsClient, Map<String, String> extraHeaders,
         List<Pair> extraQueryParams) {
         this.wsClient = wsClient;
@@ -74,7 +83,7 @@ public class Play25CallFactory implements okhttp3.Call.Factory {
             }
         }
 
-        return new PlayWSCall(wsClient, rb.build());
+        return new PlayWSCall(wsClient, this.filters, rb.build());
     }
 
     /**
@@ -84,12 +93,14 @@ public class Play25CallFactory implements okhttp3.Call.Factory {
 
         private final WSClient wsClient;
         private WSRequest wsRequest;
+        private List<WSRequestFilter> filters;
 
         private final Request request;
 
-        public PlayWSCall(WSClient wsClient, Request request) {
+        public PlayWSCall(WSClient wsClient, List<WSRequestFilter> filters, Request request) {
             this.wsClient = wsClient;
             this.request = request;
+            this.filters = filters;
         }
 
         @Override
@@ -126,6 +137,7 @@ public class Play25CallFactory implements okhttp3.Call.Factory {
                 if (request.body() != null) {
                     addBody(wsRequest);
                 }
+                filters.stream().forEach(f -> wsRequest.withRequestFilter(f));
 
                 return wsRequest.execute(request.method());
             } catch (Exception e) {

samples/client/petstore/java/retrofit2-play25/src/main/java/io/swagger/client/Play25CallFactory.java

@@ -6,6 +6,7 @@
 import play.libs.ws.WSClient;
 import play.libs.ws.WSRequest;
 import play.libs.ws.WSResponse;
+import play.libs.ws.WSRequestFilter;
 
 import java.io.IOException;
 import java.net.MalformedURLException;
@@ -31,11 +32,19 @@ public class Play25CallFactory implements okhttp3.Call.Factory {
 
     /** Extra query parameters to add to request */
     private List<Pair> extraQueryParams = new ArrayList<>();
+    
+    /** Filters (interceptors) */
+    private List<WSRequestFilter> filters = new ArrayList<>();
 
     public Play25CallFactory(WSClient wsClient) {
         this.wsClient = wsClient;
     }
 
+    public Play25CallFactory(WSClient wsClient, List<WSRequestFilter> filters) {
+        this.wsClient = wsClient;
+        this.filters.addAll(filters);
+    }
+
     public Play25CallFactory(WSClient wsClient, Map<String, String> extraHeaders,
         List<Pair> extraQueryParams) {
         this.wsClient = wsClient;
@@ -74,7 +83,7 @@ public Call newCall(Request request) {
             }
         }
 
-        return new PlayWSCall(wsClient, rb.build());
+        return new PlayWSCall(wsClient, this.filters, rb.build());
     }
 
     /**
@@ -84,12 +93,14 @@ static class PlayWSCall implements Call {
 
         private final WSClient wsClient;
         private WSRequest wsRequest;
+        private List<WSRequestFilter> filters;
 
         private final Request request;
 
-        public PlayWSCall(WSClient wsClient, Request request) {
+        public PlayWSCall(WSClient wsClient, List<WSRequestFilter> filters, Request request) {
             this.wsClient = wsClient;
             this.request = request;
+            this.filters = filters;
         }
 
         @Override
@@ -126,6 +137,7 @@ CompletionStage<WSResponse> executeAsync() {
                 if (request.body() != null) {
                     addBody(wsRequest);
                 }
+                filters.stream().forEach(f -> wsRequest.withRequestFilter(f));
 
                 return wsRequest.execute(request.method());
             } catch (Exception e) {