public ConfigCatalogRule(String nameAttribute,
    String catalogClass) 
{
        super();
        this.nameAttribute = nameAttribute;
        this.catalogClass = catalogClass;
}

Construct a new instance of this rule that looks for an attribute with the specified name.

Parameters:

nameAttribute - Name of the attribute containing the name under which this command should be registered

catalogClass - Name of the implementation class for newly created Catalog instances

 public  void begin(String namespace,
    String name,
    Attributes attributes) throws Exception 
{
    // --------------------------------------------------------- Public Methods
        // Retrieve any current Catalog with the specified name
        Catalog catalog = null;
        CatalogFactory factory = CatalogFactory.getInstance();
        String nameValue = attributes.getValue(nameAttribute);
        if (nameValue == null) {
            catalog = factory.getCatalog();
        } else {
            catalog = factory.getCatalog(nameValue);
        }
        // Create and register a new Catalog instance if necessary
        if (catalog == null) {
            Class clazz = digester.getClassLoader().loadClass(catalogClass);
            catalog = (Catalog) clazz.newInstance();
            if (nameValue == null) {
                factory.setCatalog(catalog);
            } else {
                factory.addCatalog(nameValue, catalog);
            }
        }
        // Push this Catalog onto the top of the stack
        digester.push(catalog);
}

Retrieve or create a Catalog with the name specified by the nameAttribute attribute, or the default Catalog if there is no such attribute defined. Push it onto the top of the stack.