Ratpack Promise add support for apply method

Author: JLLeitschuh

java/ql/src/semmle/code/java/frameworks/ratpack/RatpackExec.qll

@@ -54,7 +54,7 @@ abstract private class SimpleFluentLambdaMethod extends FluentLambdaMethod {
 private class RatpackPromiseMapMethod extends SimpleFluentLambdaMethod {
   RatpackPromiseMapMethod() {
     getDeclaringType() instanceof RatpackPromise and
-    hasName(["map", "flatMap", "blockingMap"])
+    hasName(["map", "flatMap", "blockingMap", "apply"])
   }
 
   override predicate consumesTaint(int lambdaArg) { lambdaArg = 0 }

java/ql/test/library-tests/frameworks/ratpack/resources/Resource.java

@@ -189,4 +189,24 @@ void test8() {
                 sink(value); //$hasTaintFlow
             });
     }
+
+    void test9() {
+        String tainted = taint();
+        Promise
+            .value(tainted)
+            .apply(Resource::identity)
+            .then(value -> {
+                sink(value); //$hasTaintFlow
+            });
+        Promise
+            .value("potato")
+            .apply(Resource::identity)
+            .then(value -> {
+                sink(value); // no taints flow
+            });
+    }
+
+    public static Promise<String> identity(Promise<String> input) {
+        return input.map(i -> i);
+    }
 }