LayoutSetLocalServiceUtil.updateLayoutSetPrototypeLinkEnabled

SitesUtil.mergeLayoutSetProtypeLayouts

public static void setupSitesFromSiteTemplate(long groupId, long publicSiteTemplateId,
                                              long privateSiteTemplateId) throws PortalException, SystemException {
    Group group = GroupLocalServiceUtil.getGroup(groupId);
    if (publicSiteTemplateId != 0) setSiteTemplate(group, publicSiteTemplateId, false);
    if (privateSiteTemplateId != 0) setSiteTemplate(group, privateSiteTemplateId, true);
}

public static void setSiteTemplate(Group group, long siteTemplateId, boolean isPrivateLayout)
        throws PortalException, SystemException {
    long groupId = group.getGroupId();
    LayoutSetPrototype prototype = LayoutSetPrototypeLocalServiceUtil.getLayoutSetPrototype(siteTemplateId);
    boolean layoutSetPrototypeLinkEnabled = true;
    LayoutSetLocalServiceUtil.updateLayoutSetPrototypeLinkEnabled(groupId, isPrivateLayout,
            layoutSetPrototypeLinkEnabled, prototype.getUuid());
    try {
        LayoutSet layoutSet = LayoutSetLocalServiceUtil.getLayoutSet(groupId, isPrivateLayout);
        mergeLayoutSetProtypeLayouts(group, layoutSet);
    } catch (Exception e) {
        if (_log.isWarnEnabled()) {
            String privatePublic = isPrivateLayout ? "private" : "public";
            _log.warn(String.format("Could not merge %s layouts for group[%d] from template[%d]", privatePublic,
                    groupId, siteTemplateId));
            e.printStackTrace();
        }
    }
}

public static void mergeLayoutSetProtypeLayouts(Group group, LayoutSet layoutSet) throws Exception {

    MethodKey key = SitesUtilMethodKey("mergeLayoutSetProtypeLayouts", Group.class, LayoutSet.class);
    invokePortalClassMethod(key, group, layoutSet);
}
/*
 * copied from
 * http://www.liferay.com/community/forums/-/message_boards/view_message /10488983#_19_message_10488983
 * post by Jelmer Kuperus
 *
 * key: key of method to be called, e.g. com.liferay.portlet.sites.util.SitesUtil
 * arguments:  arguments to be passed to the invoked method
 * returns: result of the invoked method
 */
private static Object invokePortalClassMethod(MethodKey key, Object... arguments) throws PortalException {
    try {
        // noinspection unchecked
        return PortalClassInvoker.invoke(false, key, arguments);
    } catch (PortalException e) {
        throw e;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}
private static final String SITES_UTIL_CLASS_NAME = "com.liferay.portlet.sites.util.SitesUtil";
private static MethodKey SitesUtilMethodKey(String methodName, Class<?>... parameterTypes) {
    return new MethodKey(SITES_UTIL_CLASS_NAME, methodName, parameterTypes);
}