com.crosstreelabs.jaxrs.api.versioned.util.ValidationUtils Maven / Gradle / Ivy

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/*
 * 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 com.crosstreelabs.jaxrs.api.versioned.util;

import java.util.Collection;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.ValidationException;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;

/**
 * We encapsulate the value object validation into another class so that we can
 * check if javax.validation is available before attempting to load any related
 * classes.
 */
public class ValidationUtils {
    public static  void validate(final T vo) {
        ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
        Validator validator = factory.getValidator();
        Collection> violations = validator.validate(vo);
        if (!violations.isEmpty()) {
            ConstraintViolation violation = violations.iterator().next();
            throw new ValidationException(violation.getPropertyPath().toString()+" "+violation.getMessage());
        }
    }
}