Added Closure class
diff --git a/ndn-cpp/Closure.hpp b/ndn-cpp/Closure.hpp
new file mode 100644
index 0000000..99dafdb
--- /dev/null
+++ b/ndn-cpp/Closure.hpp
@@ -0,0 +1,68 @@
+/**
+ * @author: Jeff Thompson
+ * This is a port of py from PyCCN, written by:
+ * Derek Kulinski <takeda@takeda.tk>
+ * Jeff Burke <jburke@ucla.edu>
+ *
+ * See COPYING for copyright and distribution information.
+ */
+
+#ifndef NDN_CLOSURE_HPP
+#define NDN_CLOSURE_HPP
+
+#include "Common.hpp"
+
+namespace ndn {
+
+enum UpcallResult {
+ CLOSURE_RESULT_ERR = -1, // upcall detected an error
+ CLOSURE_RESULT_OK = 0, // normal upcall return
+ CLOSURE_RESULT_REEXPRESS = 1, // reexpress the same interest again
+ CLOSURE_RESULT_INTEREST_CONSUMED = 2, // upcall claims to consume interest
+ CLOSURE_RESULT_VERIFY = 3, // force an unverified result to be verified
+ CLOSURE_RESULT_FETCHKEY = 4 // get the key in the key locator and re-call the interest
+};
+
+enum UpcallKind {
+ UPCALL_FINAL = 0, // handler is about to be deregistered
+ UPCALL_INTEREST = 1, // incoming interest
+ UPCALL_CONSUMED_INTEREST = 2, // incoming interest, someone has answered
+ UPCALL_CONTENT = 3, // incoming verified content
+ UPCALL_INTEREST_TIMED_OUT = 4, // interest timed out
+ UPCALL_CONTENT_UNVERIFIED = 5, // content that has not been verified
+ UPCALL_CONTENT_BAD = 6 // verification failed
+};
+
+class NDN;
+class Interest;
+class ContentObject;
+
+class UpcallInfo {
+public:
+ UpcallInfo(NDN *ndn, ptr_lib::shared_ptr<Interest> interest, int matchedComps, ptr_lib::shared_ptr<ContentObject> contentObject)
+ {
+ ndn_ = ndn;
+ interest_ = interest;
+ contentObject_ = contentObject;
+ }
+
+ NDN *getNDN() { return ndn_; }
+
+ ptr_lib::shared_ptr<Interest> getInterest() { return interest_; }
+
+ ptr_lib::shared_ptr<ContentObject> getContentObject() { return contentObject_; }
+
+private:
+ NDN *ndn_;
+ ptr_lib::shared_ptr<Interest> interest_;
+ ptr_lib::shared_ptr<ContentObject> contentObject_;
+};
+
+class Closure {
+public:
+ virtual UpcallResult upcall(UpcallKind kind, UpcallInfo &upcallInfo) = 0;
+};
+
+}
+
+#endif