diff --git a/src/cryogen_core/classpath_able_io.clj b/src/cryogen_core/classpath_able_io.clj
index 643767a..26b1498 100644
--- a/src/cryogen_core/classpath_able_io.clj
+++ b/src/cryogen_core/classpath_able_io.clj
@@ -15,18 +15,12 @@
            [java.nio.file.attribute FileAttribute]))
 
 ; -------------------- Domain Definition ------------------------------
-(def SourceType (s/enum :classpath :filesystem))
-
+(def SourceType (s/enum :java-classpath-filesystem :java-classpath-jar :filesystem))
 (def ResourceType (s/enum :file :dir :unknown))
-
 (def Prefix s/Str)
-
 (def JavaUri s/Any) ; java.net.URI
-
 (def VirtualPath s/Str)
-
 (def JavaPath s/Any) ; java.nio.Path
-
 (def Resource
   {:virtual-path  VirtualPath
    :source-type   SourceType
@@ -37,29 +31,39 @@
 ; ----------------------- Domain functions ------------------------
 (def no-link-option (into-array [LinkOption/NOFOLLOW_LINKS]))
 
-(s/defn create-resource :- Resource
+(s/defn is-from-classpath-jar? :- s/Bool
+  [uri ;:- JavaUri
+   ]
+  (= (.getScheme uri) "jar"))
+
+(s/defn create-fs-resource :- Resource
   ([virtual-path :- VirtualPath
-    uri :- JavaUri
-    java-path :- JavaPath
-    source-type :- SourceType
-    resource-type :- ResourceType]
-   {:virtual-path    virtual-path
-    :java-uri            uri
+    java-path :- JavaPath]
+   {:virtual-path  virtual-path
+    :java-uri      (.toUri java-path)
     :java-path     java-path
-    :source-type   source-type
-    :resource-type resource-type})
-  ([virtual-path :- VirtualPath
-    java-path :- JavaPath
-    source-type :- SourceType]
-   {:virtual-path    virtual-path
-    :java-uri            (.toUri java-path)
-    :java-path     java-path
-    :source-type   source-type
+    :source-type   :filesystem
     :resource-type (cond
                      (Files/isDirectory java-path no-link-option) :dir
                      (Files/isRegularFile java-path no-link-option) :file
                      :else :unknown)}))
 
+
+(s/defn create-cp-resource :- Resource
+  ([virtual-path :- VirtualPath
+    java-path :- JavaPath]
+   (let [java-uri (.toUri java-path)]
+     {:virtual-path  virtual-path
+      :java-uri      java-uri
+      :java-path     java-path
+      :source-type   (cond (is-from-classpath-jar? java-uri)
+                           :java-classpath-jar
+                           :else :java-classpath-filesystem)
+      :resource-type (cond
+                       (Files/isDirectory java-path no-link-option) :dir
+                       (Files/isRegularFile java-path no-link-option) :file
+                       :else :unknown)})))
+
 (s/defn is-file? :- s/Bool
   [resource :- Resource]
   (= :file (:resource-type resource)))
@@ -98,18 +102,18 @@
         (FileSystems/newFileSystem filesystem-uri {})))))
 
 ; contains either a jar or a file
-(s/defn path-from-cp ;  :- JavaPath
+(s/defn path-from-cp ;:- JavaPath
   [resource-path :- VirtualPath]
   (try
-    (let [resource-uri (.toURI (io/resource resource-path))] ; check if contains jar:
-      (when (= (.getScheme resource-uri) "jar")
+    (let [resource-uri (.toURI (io/resource resource-path))]
+      (when (is-from-classpath-jar? resource-uri)
         (init-file-system resource-uri))
       (when (Files/exists (Paths/get resource-uri) no-link-option)
         (Paths/get resource-uri)))
     (catch Exception e
       nil)))
 
-(s/defn path-from-fs ;  :- JavaPath
+(s/defn path-from-fs ;:- JavaPath
   [full-path :- VirtualPath]
   (let [path-from-fs (Paths/get (URI. (str "file://" full-path)))] ;fragile
     (try
@@ -118,10 +122,10 @@
       (catch Exception e
         nil))))
 
-(defn resource-from-cp-or-fs ; :- Resource 
-  [fs-prefix ; :- Prefix
-   base-path ; :- VirtualPath
-   resource-path ; :- VirtualPath
+(defn resource-from-cp-or-fs ;:- Resource 
+  [fs-prefix ;:- Prefix
+   base-path ;:- VirtualPath
+   resource-path ;:- VirtualPath
    & {:keys [from-cp from-fs]
       :or   {from-cp true
              from-fs true}}]
@@ -137,9 +141,9 @@
                        nil)]
     (cond
       (some? path-from-fs)
-      (create-resource resource-path path-from-fs :filesystem)
+      (create-fs-resource resource-path path-from-fs)
       (some? path-from-cp)
-      (create-resource resource-path path-from-cp :classpath)
+      (create-cp-resource resource-path path-from-cp)
       :else nil)))
 
 (defn path-from-cp-or-fs ; :- JavaPath
@@ -156,6 +160,10 @@
     (when (some? resource)
       (:java-path resource))))
 
+(s/defn list-entries-for-dir ;:- [VirtualPath]
+  [resource :- Resource] 
+  (.list (io/file (.toString (:java-path resource))))) ; TODO doesnt work in jars
+
 (defn get-resources-recursive ;:- [Resource]
   [fs-prefix ;:- Prefix
    base-path ;:- VirtualPath
@@ -186,7 +194,7 @@
             (recur (into (drop 1 paths)
                          (map #(str path-to-work-with "/" %)
                               ; Bsp-Code: https://github.com/clojure/java.classpath/blob/c10fc96a8ff98db4eb925a13ef0f5135ad8dacc6/src/main/clojure/clojure/java/classpath.clj#L50
-                              (.list (io/file (.toString (:java-path resource-to-work-with)))))) ; TODO doesnt work in jars
+                              (list-entries-for-dir resource-to-work-with))) 
                    result))))
       result)))
 
diff --git a/test/cryogen_core/classpath_able_io_test.clj b/test/cryogen_core/classpath_able_io_test.clj
index 22a7e33..f582bfa 100644
--- a/test/cryogen_core/classpath_able_io_test.clj
+++ b/test/cryogen_core/classpath_able_io_test.clj
@@ -30,9 +30,9 @@
    (some? (sut/resource-from-cp-or-fs
            "not-existing-filesystem-path"
            ""
-           "dummy")))
+            "dummy")))
   (is
-   (Files/exists
+   (Files/exists        
     (:java-path
      (sut/resource-from-cp-or-fs
       "./test-resources"
@@ -53,7 +53,7 @@
            "./not-existing-so-load-from-cp" "" ".gitkeep")))
   (is (=
        {:virtual-path    "js/subdir"
-        :source-type   :classpath
+        :source-type   :java-classpath-filesystem
         :resource-type :dir}
        (ftt/filter-object
         (sut/resource-from-cp-or-fs
@@ -61,6 +61,20 @@
          "templates/themes/bootstrap4-test"
          "js/subdir")))))
 
+(deftest test-list-entries-for-dir
+  (is (= ["subdummy.js", "test.js"]
+         (seq
+          (sut/list-entries-for-dir (sut/resource-from-cp-or-fs
+                                     "./not-existing-so-load-from-cp"
+                                     "templates/themes/bootstrap4-test"
+                                     "js/subdir")))))
+  (is (= ["dummy-from-jar"]
+         (sut/list-entries-for-dir (sut/resource-from-cp-or-fs
+                                    "not-existing-filesystem-path"
+                                    ""
+                                    "dummy")))))
+
+
 (deftest test-get-resources-recursive
   (is (=
        []
@@ -70,13 +84,13 @@
   ; add test here
   ; TODO: fix dir.list on jar
   (is (=
-       [{:virtual-path "dummy", :source-type :classpath, :resource-type :dir}
-        {:virtual-path "dummy/dummy_from_jar", :source-type :classpath, :resource-type :file}]
+       [{:virtual-path "dummy", :source-type :java-classpath-jar, :resource-type :dir}
+        {:virtual-path "dummy/dummy_from_jar", :source-type :java-classpath-jar, :resource-type :file}]
        (map ftt/filter-object
             (sut/get-resources-recursive "not-existing" "" ["dummy"]))))
   (is (=
        [{:virtual-path   "js/dummy.js"
-         :source-type   :classpath
+         :source-type   :java-classpath-filesystem
          :resource-type :file}]
        (map ftt/filter-object
             (sut/get-resources-recursive