It is effectively not possible to use reflection in GWT (well, not entirely
true, some people have made libraries to make it somehow possible); see
notes
in http://www.gwtproject.org/doc/latest/DevGuideCodingBasicsCompatibility.html
and
http://www.gwtproject.org/doc/latest/DevGuideCodingBasicsDeferred.html#benefits
(returned by a search on "reflection" in the website).
Note however that GWT Generators are likely to go away in the so-called
"GWT 3.0" and you're invited to use annotation processors instead. In any
case, the idea is the same: to cut down on boilerplate, have it generated
for you rather than relying on reflection; in other words, do your
meta-programming at compilation-time rather than at runtime.
On Tuesday, December 1, 2015 at 10:25:23 AM UTC+1, Jonathan Fischer wrote:
>
> Basically, I want to cut down on a bunch of boilerplate code (needing to
> check if a list of boolean fields are true/false across a collection of
> objects). In normal Java, I can use Class.getDeclaredField and
> Field.getBoolean to do that, something like:
>
>
> public static boolean allTrue(Class<? extends Object> cls, List<? extends
> Object> things, String fieldName) {
> try {
> Field field = cls.getDeclaredField(fieldName);
> boolean val = true;
> for (Object o : things) {
> val = val && field.getBoolean(o);
> }
>
> return val;
> } catch (Exception e) {
> return false;
> }
> }
>
>
> I don't see any way to accomplish the same thing in GWT code, at least not
> in the GWT site
> <http://www.gwtproject.org/doc/latest/RefJreEmulation.html>. Is this just
> not an option under GWT?
>
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