Converted the ModelAndView to return a Map<String, Object>.

Updated GenericIntegrationTest to pass with the change.

src/main/java/spark/ModelAndView.java

@@ -16,6 +16,8 @@
  */
 package spark;
 
+import java.util.Map;
+
 /**
  * Model And View class is used to set the name of the view and the model object
  * to be rendered.
@@ -27,7 +29,7 @@ public class ModelAndView {
     /**
      * Model object.
      */
-    private Object model;
+    private Map<String, Object> model;
     /**
      * View name used to render output.
      */
@@ -39,16 +41,15 @@ public class ModelAndView {
      * @param model    the model
      * @param viewName the view name
      */
-    public ModelAndView(Object model, String viewName) {
-        super();
+    public ModelAndView(Map<String, Object> model, String viewName) {
         this.model = model;
         this.viewName = viewName;
     }
 
     /**
      * @return the model object
      */
-    public Object getModel() {
+    public Map<String, Object> getModel() {
         return model;
     }
 

src/main/java/spark/Spark.java

@@ -16,6 +16,8 @@
  */
 package spark;
 
+import java.util.Map;
+
 import static spark.Service.ignite;
 
 /**
@@ -1077,7 +1079,7 @@ public static void init() {
      * @param viewName the view name
      * @return the model and view
      */
-    public static ModelAndView modelAndView(Object model, String viewName) {
+    public static ModelAndView modelAndView(Map<String, Object> model, String viewName) {
         return new ModelAndView(model, viewName);
     }
 

src/main/java/spark/TemplateEngine.java

@@ -1,6 +1,8 @@
 package spark;
 
 
+import java.util.Map;
+
 /**
  * A Template holds the implementation of the 'render' method.
  * TemplateViewRoute instead of returning the result of calling toString() as body, it returns the result of calling render method.
@@ -28,7 +30,7 @@ public String render(Object object) {
      * @param viewName to be rendered.
      * @return object with model and view set.
      */
-    public ModelAndView modelAndView(Object model, String viewName) {
+    public ModelAndView modelAndView(Map<String, Object> model, String viewName) {
         return new ModelAndView(model, viewName);
     }
 

src/main/java/spark/TemplateViewRouteImpl.java

@@ -17,6 +17,8 @@
 package spark;
 
 
+import java.util.Map;
+
 /**
  * A TemplateViewRoute is built up by a path (for url-matching) and the implementation of the 'render' method.
  * TemplateViewRoute instead of returning the result of calling toString() as body, it returns the result of calling render method.
@@ -92,7 +94,7 @@ public Object render(Object object) {
      * @param viewName t be rendered.
      * @return object with model and view set.
      */
-    public ModelAndView modelAndView(Object model, String viewName) {
+    public ModelAndView modelAndView(Map<String, Object> model, String viewName) {
         return new ModelAndView(model, viewName);
     }
 

src/test/java/spark/GenericIntegrationTest.java

@@ -117,7 +117,10 @@ public static void setup() throws IOException {
         });
 
         get("/templateView", (q, a) -> {
-            return new ModelAndView("Hello", "my view");
+            return new ModelAndView(new HashMap<String, Object>() {
+                {
+                    put("hello", "Hello");
+                }}, "my view");
         }, new TemplateEngine() {
             public String render(ModelAndView modelAndView) {
                 return modelAndView.getModel() + " from " + modelAndView.getViewName();
@@ -214,7 +217,7 @@ public void routes_should_be_accept_type_aware() throws Exception {
     public void template_view_should_be_rendered_with_given_model_view_object() throws Exception {
         UrlResponse response = testUtil.doMethod("GET", "/templateView", null);
         Assert.assertEquals(200, response.status);
-        Assert.assertEquals("Hello from my view", response.body);
+        Assert.assertEquals("{hello=Hello} from my view", response.body);
     }
 
     @Test