CodeValueValidator.java

/*
 * Copyright 2020 Global Crop Diversity Trust
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.gringlobal.custom.validation.javax;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

import org.apache.commons.lang3.StringUtils;
import org.gringlobal.component.elastic.AppContextHelper;

/**
 * @author Maxym Borodenko
 */
public class CodeValueValidator implements ConstraintValidator<CodeValueField, String> {

    /**
     * Specified group.
     */
    private String groupName;

    /**
     * When not strict then validation is skipped.
     */
    private boolean strict;

    /**
     * Initializes the validator.
     */
    @Override
    public void initialize(CodeValueField constraintAnnotation) {
        this.groupName = constraintAnnotation.value();
        this.strict = constraintAnnotation.strict();
    }

    /**
     * Implements the validation logic.
     * @return {@code false} if {@code value} isn't defined in the specified group
     */
    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        if (StringUtils.isBlank(value) || !strict) {
            return true; // nothing to validate here
        }

        if (! AppContextHelper.validateCodeValue(groupName, value)) {
            context.disableDefaultConstraintViolation();
            String message = value + " is not a valid CodeValue of " + groupName;
            context.buildConstraintViolationWithTemplate(message).addConstraintViolation();
            return false;
        }

        return true;
    }

}