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javanullguicenullable

com.sun.istack.internal.Nullable Annotation and Guice

When Guice says that it recognizes any @Nullable annotation here (http://code.google.com/p/google-guice/wiki/UseNullable) does that mean I can use com.sun.istack.internal.Nullable provided by the Java 7 Runtime successfully?

The fact that the package name is com.sun.istack.internal leads me to believe that I probably shouldn't be using it, but it is pretty convenient to use...

Solution

  • If null is permissible by your class, you can annotate the field or parameter with @Nullable. Guice recognizes any @Nullable annotation, like edu.umd.cs.findbugs.annotations.Nullable or javax.annotation.Nullable. —from the Guice site

    To confirm chrylis's hunch above, Guice simply tests the name of the class.

    // from core/src/com/google/inject/internal/Nullability.java
if ("Nullable".equals(type.getSimpleName())) {
  return true;
}