public FinderFromDfltResource() 
{
    
        this(DFLT_RESOURCE_SUFFIX);
}

See #findLoader .

 public FinderFromDfltResource(String resourceSuffix) 
{
 
        this.resourceSuffix = resourceSuffix;
}

Create a rule-finder which can load an xmlrules file, cache the rules away, and later add them as a plugin's custom rules when that plugin is referenced.

Parameters:

resourceSuffix - must be non-null.

 public RuleLoader findLoader(Digester d,
    Class pluginClass,
    Properties p) throws PluginException 
{
        String resourceName = 
            pluginClass.getName().replace('.", '/") 
                    + resourceSuffix;
        InputStream is = 
            pluginClass.getClassLoader().getResourceAsStream(
                resourceName);
        if (is == null) {
            // ok, no such resource
            return null;
        }
        return FinderFromResource.loadRules(d, pluginClass, is, resourceName);
}

If there exists a resource file whose name is equal to the plugin class name + the suffix specified in the constructor, then load that file, run it through the xmlrules module and return an object encapsulating those rules.

If there is no such resource file, then just return null.

The returned object (when non-null) will add the selected rules to the digester whenever its addRules method is invoked.