v5 middleware support

src/main/java/com/microsoft/azure/functions/ExecutionContext.java

@@ -6,8 +6,6 @@
 
 package com.microsoft.azure.functions;
 
-import java.lang.reflect.Parameter;
-import java.util.Map;
 import java.util.logging.Logger;
 
 /**
@@ -52,19 +50,5 @@ public interface ExecutionContext {
     default RetryContext getRetryContext() {
         return null;
     }
-
-    Map<String, Parameter> getParameterMap();
-
-    Map<String, String> getParameterPayloadMap();
-
-    void setMiddlewareInput(String key, Object value);
-
-    Object getReturnValue();
-
-    void setMiddlewareOutput(Object value);
-
-    void setFunctionInstance(Object functionInstance);
-
-    Class<?> getContainingClass();
 }
 

src/main/java/com/microsoft/azure/functions/middleware/FunctionWorkerChain.java

@@ -5,8 +5,6 @@
  */
 package com.microsoft.azure.functions.middleware;
 
-import com.microsoft.azure.functions.ExecutionContext;
-
 public interface FunctionWorkerChain {
-    void doNext(ExecutionContext context) throws Exception;
+    void doNext(MiddlewareExecutionContext context) throws Exception;
 }

src/main/java/com/microsoft/azure/functions/middleware/FunctionWorkerMiddleware.java

@@ -5,8 +5,6 @@
  */
 package com.microsoft.azure.functions.middleware;
 
-import com.microsoft.azure.functions.ExecutionContext;
-
 public interface FunctionWorkerMiddleware {
-    void invoke(ExecutionContext context, FunctionWorkerChain next) throws Exception;
+    void invoke(MiddlewareExecutionContext context, FunctionWorkerChain next) throws Exception;
 }

src/main/java/com/microsoft/azure/functions/middleware/MiddlewareExecutionContext.java

@@ -0,0 +1,28 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ */
+package com.microsoft.azure.functions.middleware;
+
+import com.microsoft.azure.functions.ExecutionContext;
+import java.lang.reflect.Parameter;
+import java.util.Map;
+
+//TODO: think about using aggregation
+public interface MiddlewareExecutionContext extends ExecutionContext {
+
+    Object getReturnValue();
+
+    void setMiddlewareOutput(Object value);
+
+    void setFunctionInstance(Object functionInstance);
+
+    Class<?> getContainingClass();
+
+    Map<String, Parameter> getParameterMap();
+
+    Object getParameterPayloadByName(String name);
+
+    void updateParameterPayloadByName(String name, Object payload);
+}