Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8180075

Javadoc of MethodHandles.Lookup::bind should note the difference from MethodHandle::bindTo

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P5
    • Resolution: Fixed
    • Affects Version/s: 9
    • Fix Version/s: 9
    • Component/s: core-libs
    • Subcomponent:
    • Resolved In Build:
      b170
    • Verification:
      Not verified

      Backports

        Description

        Javadoc of MethodHandles.Lookup::bind describes its relation to the MethodHandle::bindTo. Specifically, it says
            (Note that {@code bindTo} does not preserve variable arity.)

        JDK-8177146 introduced another difference: in the example below 'bind' throws IllegalAccessException but 'bindTo' throws ClassCastException.
        That should be noted in the Javadoc.

        Example:
        =================================
        public class B extends A {
            public static void main(String[] args) throws Throwable {
                // throws IAE
                MethodHandle bound2 = lookup().bind(new A() , "m", MethodType.methodType(void.class));

                // throws CCE
                lookup().findVirtual(A.class, "m", MethodType.methodType(void.class))
                        .bindTo(new A());
            }
        }

        package pkg;
        public class A {
            protected void m() { }
        }
        =================================

          Attachments

            Issue Links

              Activity

                People

                Assignee:
                psandoz Paul Sandoz
                Reporter:
                slukyanov Stanislav Lukyanov (Inactive)
                Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                  Dates

                  Created:
                  Updated:
                  Resolved: