io Programmo 39/IOPROG_39.ISO/SOFT/sdkjava40.exe/data1.cab/fg_Samples/Samples/afc11/AFCDetect/src/AFCVersionManager.java

Java Source | 2000-05-04 | 4.5 KB | 174 lines

//
// (C) Copyright 1995 - 1999 Microsoft Corporation.  All rights reserved.
//

import com.ms.util.SystemVersionManager;
import java.util.Properties;

/**
 *    Version Mananger class for AFC. This class will obtain version information
 *    about AFC through the getAFCVersion() method.
 *
 *    @version    1.0, 8/19/97
 */

public final class AFCVersionManager
{
    /**
     *    Creates a new Properties object with the keys necessary for extracting
     *    version information. Uses the passed values as the version number.
     *
     *    @param    major    Major version number
     *    @param    minor    Minor version number
     *    @param    buildnum    Build number
     *    @param    buildinc    Build increment number
     *    @param    description    Description of the version
     *    @returns    A Properties object which holds the version information
     */
    public static Properties createVersion (int major, int minor, int buildnum, int buildinc, String description)
        {
            // from the VersionManager sample from SDK 1.5 Samples.

            Properties info = new Properties();

            // These properties should be present on all version objects.

            info.put("MajorVersion", Integer.toString(major));
            info.put("MinorVersion", Integer.toString(minor));
            info.put("Description", new String(description));

            return info;
        }

    /**
     *    Find version information for the specified package. Returns this
     *    information in a Properties object. See the com.util.SystemVersionManager
     *    class for the keys to expect in the returned Properties object.
     *
     *    @param    pkgname    Name of package to retrieve version information
     *    @returns    A Properties object which holds the version information
     */
    public static Properties getPackageVersion (String pkgname)
        {
            // from the VersionManager sample from SDK 1.5 Samples.

            Properties info = null;

            try
                {
                    info = SystemVersionManager.getPackageVersion(pkgname);

                    if (info != null)
                        return info;
                }
            catch (Throwable e)
                {
                    // No system version manager installed.
                }

            if (pkgname == null)
                return null;


            // Attempt to locate a 'Version' class within the specified package.
            // If not found, try the parent package.

            try
                {
                    Class c = Class.forName((pkgname.length() > 0) ? (pkgname+".Version") : "Version");
                    Object o = c.newInstance();
                    //info = ((Version)o).getVersion();
                    info = (Properties)o;
                }
            catch (ClassNotFoundException e)
                {
                    int i = pkgname.lastIndexOf('.');

                    if (i != -1)
                        info = getPackageVersion(pkgname.substring(0,i));
                }
            catch (Throwable e)
                {
                }

            return info;
        }

    /**
     *    Retrieves the full dot-separated version number (major, minor, build number, build increment) of the package
     *
     *    @param    pkgname    Name of package to retrieve version information
     *    @returns    A string which holds the version information
     */
    static public String getPackageVersionFull(String packageName)
        {
            Properties prop = AFCVersionManager.getPackageVersion(packageName);

            if (prop == null)
                {
                    return null;
                }

            return    (String)prop.get("MajorVersion")+"."+
                    (String)prop.get("MinorVersion");
        }

    /**
     *    Retrieves the major version number of the package.
     *
     *    @param    pkgname    Name of package to retrieve version information
     *    @returns    The major version number of the package
     */
    static public int getPackageVersionMajor(String packageName)
        {
            Properties prop = getPackageVersion(packageName);

            if (prop == null)
                {
                    return -1;
                }

            return Integer.parseInt((String)prop.get("MajorVersion"));
        }

    /**
     *    Retrieves the minor version number of the package.
     *
     *    @param    pkgname    Name of package to retrieve version information
     *    @returns    The minor version number of the package
     */
    static public int getPackageVersionMinor(String packageName)
        {
            Properties prop = getPackageVersion(packageName);

            if (prop == null)
                {
                    return -1;
                }

            return Integer.parseInt((String)prop.get("MinorVersion"));
        }

    /**
     *    Retrieves the version description string from package.
     *
     *    @param    pkgname    Name of package to retrieve version information
     *    @returns    The description string of the package
     */

    static public String getPackageVersionDescription(String packageName)
        {
            Properties prop = getPackageVersion(packageName);

            if (prop == null)
                {
                    return null;
                }

            return (String)prop.get("Description");
        }
}