FirstUpperValidator.java

/**
 * 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.deephacks.confit.test.validation;

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

public class FirstUpperValidator implements ConstraintValidator<FirstUpper, String> {

    @Override
    public void initialize(FirstUpper firstUpper) {
        // See JSR 303 Section 2.4.1 for sample implementation.
    }

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        if (value == null || value.length() == 0) {
            return false;
        }
        return value.substring(0, 1).equals(value.substring(0, 1).toUpperCase());
    }
}