Functional Interfaces in the Java Client(#3047)

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/Action.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface Action {
     void invoke();
 }

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/Action1.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface Action1<T1> {
     void invoke(T1 param1);
 }

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/Action2.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface Action2<T1, T2> {
     void invoke(T1 param1, T2 param2);
 }

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/Action3.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface Action3<T1, T2, T3> {
     void invoke(T1 param1, T2 param2, T3 param3);
 }

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/Action4.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface Action4<T1, T2, T3, T4> {
     void invoke(T1 param1, T2 param2, T3 param3, T4 param4);
 }

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/Action5.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface Action5<T1, T2, T3, T4, T5> {
     void invoke(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5);
 }

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/Action6.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface Action6<T1, T2, T3, T4, T5, T6> {
     void invoke(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5, T6 param6);
 }

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/Action7.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface Action7<T1, T2, T3, T4, T5, T6, T7> {
     void invoke(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5, T6 param6, T7 param7);
 }

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/Action8.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface Action8<T1, T2, T3, T4, T5, T6, T7, T8> {
     void invoke(T1 param1, T2 param2, T3 param3, T4 param4, T5 param5, T6 param6, T7 param7, T8 param8);
 }

clients/java/signalr/src/main/java/com/microsoft/aspnet/signalr/ActionBase.java

@@ -3,6 +3,7 @@
 
 package com.microsoft.aspnet.signalr;
 
+@FunctionalInterface
 public interface ActionBase {
     void invoke(Object ... params);
 }