com.celum.dbtool.step.RegularVersion 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;

/**
 * Representing regular software version in 4-number
 * format major[.minor[.build]].step
 *
 * @author Zdenko Vrabel ([email protected])
 */
public class RegularVersion extends Version
{
    private final long major;
    private final long minor;
    private final long build;
    private final long step;


    /**
     * Constructor
     */
    public RegularVersion(long major, long minor, long build, long step)
    {
        this.major = major;
        this.minor = minor;
        this.build = build;
        this.step = step;
    }


    /**
     * Constructor
     */
    public RegularVersion(long major, long minor, long step)
    {
        this(major, minor, -1, step);
    }


    /**
     * Constructor
     */
    public RegularVersion(long major, long step)
    {
        this(major, -1, step);
    }


    /**
     * Constructor
     */
    public RegularVersion(long step)
    {
        this(0, -1, step);
    }


    /**
     * returns major number
     */
    public long getMajor()
    {
        return major;
    }

    /**
     * returns minor number
     */
    public long getMinor()
    {
        return minor;
    }

    /**
     * returns build number
     */
    public long getBuild()
    {
        return build;
    }

    /**
     * returns DB migration step
     */
    public long getStep()
    {
        return step;
    }

    /**
     * {@inheritDoc}
     * @return
     */
    @Override
    public String toString()
    {
        String version = Long.toString(major);

        if (minor >= 0) {
            version += "." + minor;
        }

        if (build >= 0) {
            version += "." + build;
        }

        version += "." + step;

        return version;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public int hashCode() {
        int result = (int) (major ^ (major >>> 32));
        result = 31 * result + (int) (minor ^ (minor >>> 32));
        result = 31 * result + (int) (build ^ (build >>> 32));
        result = 31 * result + (int) (step ^ (step >>> 32));
        return result;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public int compareTo(Version o)
    {
        if (!(o instanceof RegularVersion)) {
            throw new VersionException("cannot compare RegularVersion with " + o.getClass().getName() );
        }
        RegularVersion version = (RegularVersion)o;

        //compare major
        if (major < version.major) {
            return -1;
        } else if (major > version.major) {
            return 1;
        }

        //compare minor
        if (minor < version.minor) {
            return -1;
        } else if (minor > version.minor) {
            return  1;
        }

        //compare build
        if (build < version.build) {
            return -1;
        } else if (build > version.build) {
            return  1;
        }

        //compare build
        if (step < version.step) {
            return -1;
        } else if (step > version.step) {
            return  1;
        }

        return 0;
    }
}