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avaje validator constraint annotations

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package io.avaje.validation.constraints;

import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE_USE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

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

/**
 * The annotated element must not be {@code null}. Accepts any type.
 *
 * @author Emmanuel Bernard
 */
@Constraint
@Documented
@Target({METHOD, FIELD, ANNOTATION_TYPE, PARAMETER, TYPE_USE})
@Retention(RUNTIME)
public @interface NotNull {

  String message() default "{avaje.NotNull.message}";

  Class[] groups() default {};
}