com.celum.dbtool.step.RegularVersionFactory Maven / Gradle / Ivy

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/*****************************************************************************
 * Copyright 2012 celum Slovakia s r.o.
 *
 * 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.celum.dbtool.step;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Factory class parse the string to {@link RegularVersion}.
 *
 * @author Zdenko Vrabel ([email protected])
 */
public class RegularVersionFactory implements VersionFactory
{
    private final static Pattern p1 = Pattern.compile("(\\d+)\\.(\\d+)\\.(\\d+)\\.(\\d+)");
    private final static Pattern p2 = Pattern.compile("(\\d+)\\.(\\d+)\\.(\\d+)");
    private final static Pattern p3 = Pattern.compile("(\\d+)\\.(\\d+)");

    private final static Pattern p4 = Pattern.compile("(\\d+)_(\\d+)_(\\d+)_(\\d+)");
    private final static Pattern p5 = Pattern.compile("(\\d+)_(\\d+)_(\\d+)");
    private final static Pattern p6 = Pattern.compile("(\\d+)_(\\d+)");

    private final static Pattern p7 = Pattern.compile("(\\d+)");


    /**
     * {@inheritDoc}
     */
    @Override
    public Version parse(String text)
    {
        Matcher m = null;

        m = p1.matcher(text);
        if (m.find()) {
            return new RegularVersion(Long.parseLong(m.group(1)), Long.parseLong(m.group(2)), Long.parseLong(m.group(3)), Long.parseLong(m.group(4)));
        }

        m = p2.matcher(text);
        if (m.find()) {
            return new RegularVersion(Long.parseLong(m.group(1)), Long.parseLong(m.group(2)), Long.parseLong(m.group(3)));
        }

        m = p3.matcher(text);
        if (m.find()) {
            return new RegularVersion(Long.parseLong(m.group(1)), Long.parseLong(m.group(2)));
        }

        m = p4.matcher(text);
        if (m.find()) {
            return new RegularVersion(Long.parseLong(m.group(1)), Long.parseLong(m.group(2)), Long.parseLong(m.group(3)), Long.parseLong(m.group(4)));
        }

        m = p5.matcher(text);
        if (m.find()) {
            return new RegularVersion(Long.parseLong(m.group(1)), Long.parseLong(m.group(2)), Long.parseLong(m.group(3)));
        }

        m = p6.matcher(text);
        if (m.find()) {
            return new RegularVersion(Long.parseLong(m.group(1)), Long.parseLong(m.group(2)));
        }

        m = p7.matcher(text);
        if (m.find()) {
            return new RegularVersion(Long.parseLong(m.group(1)));
        }

        throw new VersionException("cannot parse RegularVersion from '" + text + "'");
    }
}