Java: remove Function.apply model

Author: Jami Cogswell

java/ql/lib/ext/java.util.function.model.yml

@@ -9,5 +9,4 @@ extensions:
       pack: codeql/java-all
       extensible: summaryModel
     data:
-      - ["java.util.function", "Function", True, "apply", "(Object)", "", "Argument[0]", "ReturnValue", "taint", "manual"]
       - ["java.util.function", "Supplier", False, "get", "()", "", "Argument[-1]", "ReturnValue", "value", "manual"]

java/ql/test/ext/TestModels/Test.java

@@ -78,12 +78,6 @@ public void test() throws Exception {
             sink(ar.get());  // $hasValueFlow
 
             // java.util.function
-            Function<Object, Object> func = a -> a + "";
-            sink(func.apply(source()));  // $hasTaintFlow
-
-            Function<Integer, Double> half = a -> a / 2.0;
-            sink(half.apply((Integer)source())); // $hasTaintFlow
-
             Supplier<Double> sup = (Supplier)source();
             sink(sup.get()); // $hasValueFlow
 

java/ql/test/ext/TopJdkApis/TopJdkApis.qll

@@ -146,6 +146,7 @@ class TopJdkApi extends SummarizedCallableBase {
    * `java.lang.String#valueOf(Object)`: a complex case; an alias for `Object.toString`, except the dispatch is hidden
    * `java.lang.Throwable#printStackTrace()`: should probably not be a general step, but there might be specialised queries that care
    * `java.util.function.Consumer#accept(Object)`: specialized lambda flow
+   * `java.util.function.Function#apply(Object)`: specialized lambda flow
    * `java.util.stream.Collectors#joining(CharSequence)`: cannot be modeled completely without a model for `java.util.stream.Stream#collect(Collector)` as well
    * `java.util.stream.Collectors#toMap(Function,Function)`: specialized collectors flow
    * `java.util.stream.Stream#collect(Collector)`: handled separately on a case-by-case basis as it is too complex for MaD

java/ql/test/ext/TopJdkApis/TopJdkApisTest.expected

@@ -1,6 +1,7 @@
 | java.lang.String#valueOf(Object) | no manual model |
 | java.lang.Throwable#printStackTrace() | no manual model |
 | java.util.function.Consumer#accept(Object) | no manual model |
+| java.util.function.Function#apply(Object) | no manual model |
 | java.util.stream.Collectors#joining(CharSequence) | no manual model |
 | java.util.stream.Collectors#toMap(Function,Function) | no manual model |
 | java.util.stream.Stream#collect(Collector) | no manual model |