Guava r07, GWT and javax.annotation.Nullable

Question

I\'m trying to use Guava in a GWT project without success (a HashMultimap, to be precise). I get a never-ending list of stacktraces for classes:

• com.google.co

Answer 1

You need to obtain the JSR 305 JAR, but in addition, you need to include the @Nullable annotation source code as food for the GWT compiler.

Assuming your project is under com/example/myproject/ Create a file: com/example/myproject/annotation/javax/annotation/Nullable.java With the following content:

package com.example.myproject.annotation.javax.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

import javax.annotation.Nonnull;
import javax.annotation.meta.TypeQualifierNickname;
import javax.annotation.meta.When;

@Documented
@TypeQualifierNickname
@Nonnull(when = When.UNKNOWN)
@Retention(RetentionPolicy.RUNTIME)
public @interface Nullable {

}

Add the line to MyProject.gwt.xml:

And you're good to go.