--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/edu/harvard/iq/dataverse/DatasetVersionDatasetUserId.java	Tue Sep 08 17:00:21 2015 +0200
@@ -0,0 +1,49 @@
+package edu.harvard.iq.dataverse;
+import java.io.Serializable;
+
+/**
+ * Id Class for {@link DatasetVersionUser}, representing a composite key.
+ * @author skraffmiller
+ */
+
+public class DatasetVersionDatasetUserId implements Serializable {
+
+    private String userIdentifier;    
+    private long datasetversionid;
+
+    @Override
+    public int hashCode() {
+        return (int) (userIdentifier.hashCode() ^ datasetversionid);
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (!(object instanceof DatasetVersionDatasetUserId)) {
+            return false;
+        }
+        DatasetVersionDatasetUserId other = (DatasetVersionDatasetUserId) object;
+        return (this.userIdentifier.equals(other.userIdentifier) && this.datasetversionid == other.datasetversionid ); 
+    }
+
+    @Override
+    public String toString() {
+        return "DatasetVersionDatasetUserId{" + "userIdentifier=" + userIdentifier + ", datasetversionid=" + datasetversionid + '}';
+    }
+
+    public String getUserIdentifier() {
+        return userIdentifier;
+    }
+
+    public void setUserIdentifier(String userIdentifier) {
+        this.userIdentifier = userIdentifier;
+    }
+
+    public long getDatasetversionid() {
+        return datasetversionid;
+    }
+
+    public void setDatasetversionid(long datasetversionid) {
+        this.datasetversionid = datasetversionid;
+    }
+    
+}