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@sruehl
Created December 1, 2014 17:21
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LocalDateValidator JSR-303
package training.domain;
import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.time.temporal.ChronoUnit;
import java.util.concurrent.TimeUnit;
/**
* @author sruehl
* @version $LastChangedVersion$
*/
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = LocalDateValidator.class)
@Documented
public @interface CheckLocalDate {
public static enum Direction {
AFTER, BEFORE
}
String message() default "{training.domain.localDate}";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
Direction direction();
ChronoUnit timeUnit();
long units();
}
package training.domain;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.time.LocalDate;
import java.time.chrono.ChronoLocalDate;
import java.time.temporal.ChronoUnit;
/**
* @author sruehl
* @version $LastChangedVersion$
*/
public class LocalDateValidator implements ConstraintValidator<CheckLocalDate, LocalDate> {
private CheckLocalDate.Direction direction;
private ChronoLocalDate chronoLocalDate;
public void initialize(CheckLocalDate constraintAnnotation) {
direction = constraintAnnotation.direction();
final long d = constraintAnnotation.units();
final ChronoUnit unit = constraintAnnotation.timeUnit();
chronoLocalDate = LocalDate.now().minus(d, unit);
}
public boolean isValid(LocalDate dateToCheck, ConstraintValidatorContext constraintContext) {
if (dateToCheck == null) {
return true;
}
switch (direction) {
case AFTER:
return dateToCheck.isBefore(chronoLocalDate);
case BEFORE:
return dateToCheck.isAfter(chronoLocalDate);
}
throw new IllegalStateException("Unreachable code");
}
}
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