[Support Old Format] Add polymorphic index usage.

1 files changed, 19 insertions, 0 deletions

diff --git a/indexer/interval_index_iface.hpp b/indexer/interval_index_iface.hpp
new file mode 100644
index 0000000000..879ee59eb9
--- /dev/null
+++ b/indexer/interval_index_iface.hpp
@@ -0,0 +1,19 @@
+#pragma once
+#include "../std/function.hpp"
+
+
+class IntervalIndexIFace
+{
+public:
+  virtual ~IntervalIndexIFace() {}
+
+  class QueryIFace
+  {
+  public:
+    virtual ~QueryIFace() {}
+  };
+
+  typedef function<void (uint32_t)> FunctionT;
+
+  virtual void DoForEach(FunctionT const & f, uint64_t beg, uint64_t end, QueryIFace & query) = 0;
+};