I’m using spring data validation and i want to validate Set or List of Date but all the examples that i saw before were validating single value, Here is request class representation
CircuitJurisdictionRequest.java
package eg.intercom.ppo.revamp.model.to.request;
import com.fasterxml.jackson.annotation.JsonFormat;
import eg.intercom.ppo.revamp.model.enums.AppliedLawEnum;
import eg.intercom.ppo.revamp.model.enums.TimeStatusEnum;
import eg.intercom.ppo.revamp.model.to.RequestActivationStatus;
import jakarta.validation.constraints.*;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.time.LocalDate;
import java.util.Date;
import java.util.Set;
@Data
@NoArgsConstructor
public class CircuitJurisdictionRequest {
@NotNull(message = "Circuit ID is required")
@Positive(message = "Circuit ID Must Be >= 1")
private Long circuitId;
@NotNull(message = "Table type ID is required")
@Positive(message = "Table type ID Must Be >= 1")
private Long tableTypeId;
@NotNull(message = "Court room ID is required")
@Positive(message = "Court room ID Must Be >= 1")
private Long courtRoomId;
@NotNull(message = "Applied law is required")
private AppliedLawEnum appliedLaw;
@NotNull(message = "Time status is required")
private TimeStatusEnum timeStatus;
@Size(max = 10, message = "Session day should not exceed 10 characters")
@Pattern(
regexp = "^(SUNDAY|MONDAY|TUESDAY|WEDNESDAY|THURSDAY|FRIDAY|SATURDAY)$",
message = "Session day must be a valid day of the week (e.g., SUNDAY, MONDAY, etc.)"
)
private String sessionDay;
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy")
private Set<@NotNull(message = "Each date in Session Scheduler must not be null") Date> sessionScheduler;
@NotNull(message = "new Cases Capacity is required")
@Min(value = 0, message = "New cases capacity must be zero or positive")
@Max(value = 1000, message = "New cases capacity should not exceed 1000")
private Integer newCasesCapacity;
@NotNull(message = "postponed Cases Capacity is required")
@Min(value = 0, message = "Postponed cases capacity must be zero or positive")
@Max(value = 1000, message = "Postponed cases capacity should not exceed 1000")
private Integer postponedCasesCapacity;
@NotNull(message = "first Session Date is required")
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy")
private LocalDate firstSessionDate; // Optionally add @Future or @NotNull if required
@NotEmpty(message = "At least one digital Jurisdiction is required")
private Set<@Min(value = 0, message = "Digital Jurisdiction Must be >= 0")
@Max(value = 9, message = "Digital Jurisdiction Must be <= 9") Integer> digitalJurisdiction;
private RequestActivationStatus activationStatus;
}
What i Want
i want to validate all dates into sessionScheduler to be sent in the request as json string with format dd-MM-yyyy
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy")
private Set<@NotNull(message = "Each date in Session Scheduler must not be null") Date> sessionScheduler;
2
To validate a collection of dates with a specific format (dd-MM-yyyy) in Spring Boot, you’ll need to combine @JsonFormat for date deserialization and a custom validator to ensure each date follows the desired format
1 ) Define ValidDateFormat Annoation for Validation
import jakarta.validation.Constraint;
import jakarta.validation.Payload;
import java.lang.annotation.*;
@Documented
@Constraint(validatedBy = DateFormatValidator.class)
@Target({ ElementType.FIELD })
@Retention(RetentionPolicy.RUNTIME)
public @interface ValidDateFormat {
String message() default "Invalid date format. Expected format is dd-MM-yyyy";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
String pattern() default "dd-MM-yyyy";
}
2 ) Define DateFormatValidator
import jakarta.validation.ConstraintValidator;
import jakarta.validation.ConstraintValidatorContext;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Set;
public class DateFormatValidator implements ConstraintValidator<ValidDateFormat, Set<Date>> {
private String pattern;
@Override
public void initialize(ValidDateFormat constraintAnnotation) {
this.pattern = constraintAnnotation.pattern();
}
@Override
public boolean isValid(Set<Date> dates, ConstraintValidatorContext context) {
if (dates == null || dates.isEmpty()) {
return true; // @NotNull/@NotEmpty will handle null/empty cases
}
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
sdf.setLenient(false);
for (Date date : dates) {
try {
String formattedDate = sdf.format(date);
sdf.parse(formattedDate);
} catch (ParseException e) {
return false;
}
}
return true;
}
}
3 ) Apply the Validator to sessionScheduler
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy")
@ValidDateFormat(message = "Each date must follow the format dd-MM-yyyy")
private Set<@NotNull(message = "Each date in Session Scheduler must not be null") Date> sessionScheduler;