com.notifier.desktop.update.Version.java Source code

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Here is the source code for com.notifier.desktop.update.Version.java

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/*
 * Android Notifier Desktop is a multiplatform remote notification client for Android devices.
 *
 * Copyright (C) 2010  Leandro Aparecido
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.notifier.desktop.update;

import java.util.*;

import com.google.common.base.*;
import com.google.common.collect.*;

public class Version implements Comparable<Version> {

    public static final Version DEV = new Version(Integer.MAX_VALUE, Integer.MAX_VALUE, Integer.MAX_VALUE);

    private static final Splitter SNAPSHOT_SPLITTER = Splitter.on('-');
    private static final Splitter NUMBER_SPLITTER = Splitter.on('.');

    private final int major;
    private final int minor;
    private final int incremental;

    public Version(int major, int minor, int incremental) {
        this.major = major;
        this.minor = minor;
        this.incremental = incremental;
    }

    public static Version parse(String s) {
        String number = Iterables.get(SNAPSHOT_SPLITTER.split(s), 0);
        Iterator<String> parts = NUMBER_SPLITTER.split(number).iterator();

        int major, minor, incremental;
        major = minor = incremental = 0;

        if (parts.hasNext()) {
            major = Integer.parseInt(parts.next());
        }

        if (parts.hasNext()) {
            minor = Integer.parseInt(parts.next());
        }

        if (parts.hasNext()) {
            incremental = Integer.parseInt(parts.next());
        }

        return new Version(major, minor, incremental);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + incremental;
        result = prime * result + major;
        result = prime * result + minor;
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof Version)) {
            return false;
        }
        Version other = (Version) obj;
        if (major != other.major) {
            return false;
        }
        if (minor != other.minor) {
            return false;
        }
        if (incremental != other.incremental) {
            return false;
        }
        return true;
    }

    @Override
    public int compareTo(Version o) {
        int diff = major - o.major;
        if (diff == 0) {
            diff = minor - o.minor;
            if (diff == 0) {
                return incremental - o.incremental;
            }
            return diff;
        }
        return diff;
    }

    @Override
    public String toString() {
        if (this.equals(DEV)) {
            return "DEV";
        }
        return major + "." + minor + "." + incremental;
    }
}