This is a known (and on-purpose) limitation; see https://github.com/gwtproject/gwt/issues/9371 (tl;dr: exposing the method like any other would have been a breaking change for all existing generators, which would have wanted to implement the method, unless they are updated to recognize them as default methods; and for static methods it would have really broken many generators which would have tried to override the static method!). Because we want to encourage migration of generators to annotation processors, there was no pressing need to support it in generators; so generators (and users of generators!) cannot take advantage of static or default methods on interfaces.
On Thursday, October 3, 2019 at 6:34:14 AM UTC+2, Freddy Boucher wrote: > > Hi, > > I'm a user of the *gwt-jackson* library and I've just found the following > bug: > https://github.com/nmorel/gwt-jackson/issues/160 > > To fix it, I need to get access of the annotations on a *default* Java8 > method interface: > > public static interface InterfaceBean { > @JsonIgnore > default String getName(){ > return "defaultName"; > } > } > > > But tell me if I'm wrong, GWT doesn't provide this information! > I did setup a minimal demo project to explain the issue: > https://github.com/freddyboucher/gwt-java8-default-method-interface > > As you see the *default* `*getGender*` method is not listed in neither > *HasGender* or *Person* JClassType > > public interface HasGender { > @Nonnull > default String getGender() { > return "male"; > } > } > > > public class Person implements HasGender { > @Nonnull > public String getName() { > return "Paul"; > } > } > > public class CustomGenerator extends Generator { > > > @Override > public final String generate(TreeLogger logger, GeneratorContext context > , String typeName) throws UnableToCompleteException { > JClassType genderType = context.getTypeOracle().findType(HasGender. > class.getName()); > assert genderType.getMethods().length == 0; > assert genderType.getInheritableMethods().length == 0; > assert genderType.getOverridableMethods().length == 0; > > > JClassType personType = context.getTypeOracle().findType(Person.class. > getName()); > assert Arrays.equals(new String[] { "getName" }, Arrays.stream( > personType.getMethods()).map(JAbstractMethod::getName).toArray()); > assert personType.getMethods()[0].isAnnotationPresent(Nonnull.class); > > > String[] common = { "equals", "finalize", "getClass", "getName", > "hashCode", "toString" }; > assert Arrays.equals(common, Arrays.stream(personType. > getInheritableMethods()).map(JAbstractMethod::getName).toArray()); > assert Arrays.equals(common, Arrays.stream(personType. > getOverridableMethods()).map(JAbstractMethod::getName).toArray()); > return null; > } > > > } > > -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/google-web-toolkit/e27108c5-5d00-4956-9905-a2430aed644f%40googlegroups.com.
