mkorman

global interface InstallHandler {
    void onInstall(InstallContext context)
}

mkorman

global class PostInstallScript implements InstallHandler {
    global void onInstall (InstallContext context) {
       InitializePackage();
    }
}

mkorman

global class PostInstallScript implements InstallHandler {
    global void onInstall (InstallContext context) {
        // Only initialize package on a fresh install!
        if (context.previousVersion == null) {
            InitializePackage();
        }
    }
}

mkorman

global class PostInstallScript implements InstallHandler {
    global void onInstall (InstallContext context)
    {
        // Only initialize package on a fresh install!
        if (context.previousVersion == null)
        {
            InitializePackage();
        }
        // Migrate data, but only for versions older than 1.2
        else if (context.previousVersion().CompareTo(new Version (1,2)) < 0)

mkorman

global class PostInstallScript implements InstallHandler {

    global void onInstall (InstallContext context)
    {
        // Initialize package (and new feature) on fresh installs
        if (context.previousVersion() == null)
        {
            InitializePackage();
            InitializeFeature13();
        }

mkorman

global class PostInstallScript implements InstallHandler {
    global void onInstall (InstallContext context)
    {
        new Feature10Installer().onInstall(context);
        new Feature12Installer().onInstall(context);
        new Feature13Installer().onInstall(context);
    }
}

mkorman

public class Feature10Installer implements InstallHandler {
    global void OnInstall (InstallContext context)
    {
        // Only initialize package on a fresh install!
        if (context.previousVersion() == null)
        {
            InitializePackage();
        }
    }
}

mkorman

public class Feature12Installer implements InstallHandler {

    global void onInstall (InstallContext context)
    {
        // Migrate data, but only for versions older than 1.2
        if (context.previousVersion != null && context.previousVersion().CompareTo(new Version (1,2)) < 0)
        {
            UpgradeForFeature12();
        }
    }

mkorman

public class Feature13Installer implements InstallHandler {

    global void onInstall (InstallContext context)
    {
        if (context.previousVersion() == null)
        {
            InitializePackage();
        }
        else if (context.previousVersion().CompareTo(new Version (1,3)) < 0)
        {

mkorman

public abstract class InstallHandlerBase implements InstallHandler
{
    public abstract Version GetLastPackageVersionWithoutFeature ();

    public void onInstall(InstallContext context)
    {
        if (isFreshInstall (context))
        {
            OnFreshInstall (context);
        }