AnnotationProcessorPico.java 文件源码

private boolean _isValidElement(Element pElement)
{
  Retention retention = pElement.getAnnotation(Retention.class);
  if (retention == null || retention.value() != RetentionPolicy.RUNTIME)
  {
    processingEnv.getMessager().printMessage(Diagnostic.Kind.MANDATORY_WARNING, "Retention should be RUNTIME", pElement);
    return false;
  }
  Target target = pElement.getAnnotation(Target.class);
  if (target == null || target.value() == null || target.value().length == 0)
  {
    processingEnv.getMessager().printMessage(Diagnostic.Kind.MANDATORY_WARNING, "Target has to be defined", pElement);
    return false;
  }
  else
  {
    for (ElementType elementType : target.value())
    {
      if (elementType != ElementType.TYPE)
      {
        processingEnv.getMessager().printMessage(Diagnostic.Kind.MANDATORY_WARNING, "Unsupported type: " + elementType, pElement);
        return false;
      }
    }
  }
  return true;
}