Re: Is there any GWT equivalent to Class.getDeclaredField?

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. Is this just not an option under GWT?

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