HibernateValidatorInfo.java

/*
 * The MIT License
 *
 * Copyright 2013-2014 Jakub Jirutka <jakub@jirutka.cz>.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package cz.jirutka.validator.collection.internal;

import org.hibernate.validator.HibernateValidator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static java.lang.Integer.parseInt;
import static org.apache.commons.lang3.StringUtils.isNotEmpty;

public abstract class HibernateValidatorInfo {

    private static final Logger LOG = LoggerFactory.getLogger(HibernateValidatorInfo.class);

    /**
     * Returns version of the Hibernate Validator determined from the package
     * info on classpath.
     *
     * <p>Version number is parsed as: 5.1.1.Final -> 511, 5.2.0-SNAPSHOT -> 520.</p>
     *
     * @return A parsed version number, or {@link Integer#MAX_VALUE} if could not be determined.
     */
    public static int getVersion() {

        Package pkg = HibernateValidator.class.getPackage();

        if (pkg != null) {
            String version = pkg.getImplementationVersion();
            String title = pkg.getImplementationTitle();

            if (isNotEmpty(version) && "hibernate-validator".equals(title)) {
                LOG.info("Found Hibernate Validator {}", version);
                return parseVersion(version);
            }
        }
        LOG.warn("Could not determine Hibernate Validator version");
        return Integer.MAX_VALUE;
    }

    static int parseVersion(String version) {
        String[] tokens = version.split("[.-]");

        return parseInt(tokens[0]) * 100
                + parseInt(tokens[1]) * 10
                + parseInt(tokens[2]);
    }
}