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## org.apache.logging.log4j.core.config.plugins.validation
Annotation Type Constraint

    @Documented
    @Target(value=ANNOTATION_TYPE)
    @Retention(value=RUNTIME)
    public @interface Constraint

Meta annotation to mark an annotation as a validation constraint. This annotation must specify a `ConstraintValidator` implementation class that has a default constructor.

Since:
  2.1

Required Element Summary
`Class<? extends ConstraintValidator<? extends Annotation>>` | `value` `ConstraintValidator` class that implements the validation logic for the annotated constraint annotation.

Element Detail

### value

    public abstract Class<? extends ConstraintValidator<? extends Annotation>> value

  `ConstraintValidator` class that implements the validation logic for the annotated constraint annotation.

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