#919 - io.ebean package initial

src/main/java/io/ebeaninternal/server/query/OrderVersionDesc.java

@@ -0,0 +1,29 @@
+package io.ebeaninternal.server.query;
+
+import io.ebean.Version;
+
+import java.sql.Timestamp;
+import java.util.Comparator;
+
+/**
+ * Compare Version beans in descending order with nulls last.
+ */
+class OrderVersionDesc implements Comparator<Version<?>> {
+
+  static final OrderVersionDesc INSTANCE = new OrderVersionDesc();
+
+  @Override
+  public int compare(Version<?> o1, Version<?> o2) {
+
+    Timestamp v1 = o1.getStart();
+    if (v1 == null) {
+      return 1;
+    }
+    Timestamp v2 = o2.getStart();
+    if (v2 == null) {
+      return -1;
+    }
+    return v1.compareTo(v2) * -1;
+  }
+
+}