infer_clone/infer/tests/codetoanalyze/java/performance/InheritanceTest.java

/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

class InheritanceTest {
  interface MyInterface {
    public void foo(int x);
  }

  class UniqueImpl implements MyInterface {
    public void foo(int x) {
      for (int i = 0; i < x; i++) {}
    }
  }

  public void call_interface_method_linear_FN(MyInterface c, int x) {
    c.foo(x);
  }

  interface MyInterface2 {
    public void foo(int x);
  }

  abstract class AbsImpl implements MyInterface2 {
    public abstract void foo(int x);
  }

  class Impl1 extends AbsImpl {
    @Override
    public void foo(int x) {
      for (int i = 0; i < x; i++) {}
    }
  }

  class Impl2 extends AbsImpl {
    @Override
    public void foo(int x) {}
  }

  /* By heuristics, [Impl1.foo] is selected. It is hard to say good or bad. */
  public void call_interface_method2_linear_FN(MyInterface2 c, int x) {
    c.foo(x);
  }

  interface MyInterface3 {
    public int unknown();
  }

  interface MyInterface4 {
    public void top_cost(MyInterface3 x);
  }

  class UniqueImpl4 implements MyInterface4 {
    public void top_cost(MyInterface3 i3) {
      for (int i = 0; i < i3.unknown(); i++) {}
    }
  }

  public void ignore_top_costed_sub_method_constant(MyInterface3 i3, MyInterface4 i4) {
    i4.top_cost(i3);
  }
}