plugin::filter::target - Use data types

manifests/plugin/filter/target.pp

@@ -1,18 +1,14 @@
 # https://collectd.org/wiki/index.php/Chains
 define collectd::plugin::filter::target (
-  $chain,
-  $plugin,
-  $options = undef,
-  $rule    = undef,
+  String $chain,
+  Collectd::Filter::Target $plugin,
+  Optional[Hash] $options = undef,
+  Optional[String] $rule  = undef,
 ) {
 
   include ::collectd
   include ::collectd::plugin::filter
 
-  unless $plugin in ['return','stop','write', 'jump'] or $plugin in $collectd::plugin::filter::plugin_targets {
-    fail("Unknown rule plugin '${plugin}' provided")
-  }
-
   # Load plugins
   if $plugin in $collectd::plugin::filter::plugin_targets {
     $order = 30

types/filter/builtintarget.pp

@@ -0,0 +1,2 @@
+# https://collectd.org/wiki/index.php/Chains#Built-in_targets
+type Collectd::Filter::Builtintarget = Enum['jump', 'stop', 'return', 'write']

types/filter/plugintarget.pp

@@ -0,0 +1,2 @@
+# https://collectd.org/wiki/index.php/Table_of_Targets
+type Collectd::Filter::Plugintarget = Enum['notification', 'replace', 'scale', 'set']

types/filter/target.pp

@@ -0,0 +1,2 @@
+# https://collectd.org/wiki/index.php/Chains
+type Collectd::Filter::Target = Variant[Collectd::Plugin::Filter::Builtintarget, Collectd::Plugin::Filter::Plugintarget]