1 files changed, 26 insertions, 0 deletions

diff --git a/store/src/main/java/tools/refinery/data/model/ModelDiffCursor.java b/store/src/main/java/tools/refinery/data/model/ModelDiffCursor.java
new file mode 100644
index 00000000..cd3eb316
--- /dev/null
+++ b/store/src/main/java/tools/refinery/data/model/ModelDiffCursor.java
@@ -0,0 +1,26 @@
+package tools.refinery.data.model;
+
+import java.util.Map;
+
+import tools.refinery.data.map.Cursor;
+import tools.refinery.data.map.DiffCursor;
+import tools.refinery.data.model.representation.DataRepresentation;
+
+public class ModelDiffCursor {
+        final Map<DataRepresentation<?, ?>,DiffCursor<?,?>> diffcursors;
+
+        public ModelDiffCursor(Map<DataRepresentation<?, ?>, DiffCursor<?, ?>> diffcursors) {
+                super();
+                this.diffcursors = diffcursors;
+        }
+        
+        @SuppressWarnings("unchecked")
+        public <K,V> DiffCursor<K,V> getCursor(DataRepresentation<K, V> representation) {
+                Cursor<?, ?> cursor = diffcursors.get(representation);
+                if(cursor != null) {
+                        return (DiffCursor<K, V>) cursor;
+                } else {
+                        throw new IllegalArgumentException("ModelCursor does not contain cursor for representation "+representation);
+                }
+        }
+}