Java Regex Version Validate parseVersion(final String versionString)

Description

parse Version

License

Open Source License

Declaration

public static Integer parseVersion(final String versionString) 

Method Source Code

//package com.java2s;

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

public class Main {
    public static Integer parseVersion(final String versionString) {
        // Our version format is as follows:
        // MajorVersion.MinorVersion.BuildVersion
        // JJ.NN.BB
        final String PERIOD_REGEX = "\\.";
        final int SIG_DIGITS = 100;

        String[] versionSections = versionString.split(PERIOD_REGEX);

        // strip trailing alpha characters, if any, from the build number
        // example 0.0.30A -> 0.0.30
        if (versionSections.length == 3) {
            final String BUILDINFO_REGEX = "([0-9]*)(.*)"; // capture groups
            final Pattern pattern = Pattern.compile(BUILDINFO_REGEX);
            final Matcher matcher = pattern.matcher(versionSections[2]);
            if (matcher.find() && matcher.groupCount() >= 2) {
                versionSections[2] = matcher.group(1); // first group
            }/*from  w  w w .j a va2s. co m*/
        }

        // /** LOG DISABLED Log.d(TAG, "parseVersion(" + versionString +
        // ") versionSections[" + versionSections.length + "]"); **/

        int iTmp = 0;

        for (int i = 0, len = versionSections.length; i < len; i++) {
            // /** LOG DISABLED Log.d(TAG, "parseVersion[" + i + "](" +
            // versionSections[i] + ")"); **/

            try {
                Integer tmpI = Integer.parseInt(versionSections[i]);
                // Increment the section (because each section can have two
                // significant digits
                iTmp *= SIG_DIGITS;
                // Add the current value to it
                iTmp += tmpI.intValue();
            } catch (NumberFormatException e) {
                /**
                 * LOG DISABLED Log.d(TAG,
                 * "Numeric Format Exception, when parsing (" +
                 * versionSections[i] + ")", e);
                 **/
            }
        }

        // /** LOG DISABLED Log.d(TAG, "parseVersion(" + versionString +
        // ") became: " + iTmp); **/

        return iTmp;
    }
}

Related

1. parseVersion(String s, String groupId, String artifactId)
2. parseVersion(String version, int defaultRevision)
3. parseVersion(String version, String currentVersion)
4. parseVersionNamespace(String versionNamespace)