ContainerUtil.java 文件源码

/**
 * Create a {@link DefaultContainer}, allowing users to upgrade to a child
 * of DefaultContainer using an {@link ServletConfig} init parameter of
 * <code>org.directwebremoting.Container</code>. Note that while the
 * parameter name is the classname of {@link Container}, currently the only
 * this can only be used to create children that inherit from
 * {@link DefaultContainer}. This restriction may be relaxed in the future.
 * Unlike {@link #setupDefaultContainer(DefaultContainer, ServletConfig)},
 * this method does not call any setup methods.
 * @param servletConfig The source of init parameters
 * @return An unsetup implementaion of DefaultContainer
 * @throws ServletException If the specified class could not be found
 * @see ServletConfig#getInitParameter(String)
 */
public static DefaultContainer createDefaultContainer(ServletConfig servletConfig) throws ServletException
{
    try
    {
        String typeName = servletConfig.getInitParameter(Container.class.getName());
        if (typeName == null)
        {
            return new DefaultContainer();
        }

        log.debug("Using alternate Container implementation: " + typeName);
        Class type = LocalUtil.classForName(typeName);
        return (DefaultContainer) type.newInstance();
    }
    catch (Exception ex)
    {
        throw new ServletException(ex);
    }
}