But by default, it all **"just works"**.

### Validation { #validation }

* Validation for most (or all?) Python **data types**, including:
    * JSON objects (`dict`).
    * JSON array (`list`) defining item types.
    * String (`str`) fields, defining min and max lengths.
    * Numbers (`int`, `float`) with min and max values, etc.

* Validation for more exotic types, like:
    * URL.
    * Email.

 * governing permissions and limitations under the License.
 */
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.

      }

    /**
     * Add a header with the specified name and value. Does validation of header names and values.
     */
    fun add(
      name: String,
      value: String,
    ) = commonAdd(name, value)

    /**
     * Add a header with the specified name and value. Does validation of header names, allowing
     * non-ASCII values.
     */
    fun addUnsafeNonAscii(

package org.codelibs.fess.app.web.admin.relatedquery;

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

import jakarta.validation.constraints.Size;

/**
 * The create form for managing related queries.
 */
public class CreateForm {

    /**

package org.codelibs.fess.app.web.admin.reqheader;

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

import jakarta.validation.constraints.Size;

/**
 * The create form for Request Header.
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.

 */
package org.codelibs.fess.app.web.admin.dict.protwords;

import org.codelibs.fess.app.web.CrudMode;
import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Size;

/**
 * Form class for creating protected words dictionary entries.
 * Protected words are terms that should not be modified or analyzed during

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.admin.scheduler;

import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Size;

/**
 * Form class for editing scheduled job configurations in the admin interface.

        }
        arraySettings.delete(BAD_WORD_SETTINGS_KEY);
    }

    /**
     * Get validation error.
     * @param badWord Bad word
     * @return Validation error
     */
    protected String getValidationError(final String badWord) {
        if (Strings.isNullOrEmpty(badWord)) {
            return "badWord was empty.";
        }

package org.codelibs.fess.app.web.admin.user;

import java.util.HashMap;
import java.util.Map;

import org.codelibs.fess.app.web.CrudMode;
import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Size;

/**
 * The create form for User.
 *
 */
public class CreateForm {

    /**
     * Default constructor.
     */

 */
package org.codelibs.fess.app.web.admin.general;

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.Size;

/**
 * Form class for editing general system settings in the admin interface.