## Custom Validation { #custom-validation }

There could be cases where you need to do some **custom validation** that can't be done with the parameters shown above.

In those cases, you can use a **custom validator function** that is applied after the normal validation (e.g. after validating that the value is a `str`).

 */
package org.codelibs.fess.validation;

import java.lang.annotation.Annotation;

import org.codelibs.fess.unit.UnitFessTestCase;

import jakarta.validation.ConstraintValidatorContext;
import jakarta.validation.Payload;

public class CustomSizeValidatorTest extends UnitFessTestCase {

    private CustomSizeValidator validator;

    @Override
    public void setUp() throws Exception {

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

import jakarta.validation.Constraint;
import jakarta.validation.Payload;

/**
 * Validation constraint to ensure that a string is a valid cron expression.
 */
@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Retention(RUNTIME)
@Documented

 */
package org.codelibs.fess.validation;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Set;

import org.codelibs.fess.unit.UnitFessTestCase;

import jakarta.validation.ConstraintViolation;
import jakarta.validation.Validation;
import jakarta.validation.Validator;
import jakarta.validation.ValidatorFactory;

 */
package org.codelibs.fess.validation;

import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.util.ComponentUtil;

import jakarta.validation.ConstraintDefinitionException;
import jakarta.validation.ConstraintValidator;
import jakarta.validation.ConstraintValidatorContext;

/**
 * Validator implementation for URI type constraints.
 * This validator checks URI strings against specified protocol types.

     * Constructs an SMB signature validation exception with message and cause.
     *
     * @param msg the detail message describing the validation failure
     * @param rootCause the underlying cause of the validation failure
     */
    public SMBSignatureValidationException(final String msg, final Throwable rootCause) {
        super(msg, rootCause);
    }

    /**
     * Constructs an SMB signature validation exception with a detail message.

        assertTrue(validator.isValid("", context));
    }

    public void test_determineValid_nullAndBlank() {
        assertTrue(validator.determineValid(null));
        assertTrue(validator.determineValid(""));
        assertTrue(validator.determineValid(" "));
        assertTrue(validator.determineValid("   "));
        assertTrue(validator.determineValid("\t"));

 */
package org.codelibs.fess.validation;

import org.lastaflute.core.message.UserMessages;
import org.lastaflute.core.message.supplier.UserMessagesCreator;
import org.lastaflute.web.servlet.request.RequestManager;
import org.lastaflute.web.validation.ActionValidator;

/**
 * Fess-specific action validator that extends the LastaFlute ActionValidator.
 * This validator provides validation functionality for Fess web actions with custom

         */
        BASE,

        /**
         * Validation for Maven 2.0 POM format.
         */
        V20,

        /**
         * Validation for Maven 3.0 POM format.
         */
        V30,

        /**
         * Validation for Maven 3.1 POM format.
         */
        V31,

        /**
         * Validation for Maven 4.0 POM format.
         */
        V40,

import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.validation.CustomSize;
import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Max;
import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.Pattern;
import jakarta.validation.constraints.Size;

/**
 * The create form for Label Type.
 */