From 922a96fee0553dda00e46f021d9c48f85457240e Mon Sep 17 00:00:00 2001
From: Michael Hackstein <michael@arangodb.com>
Date: Tue, 1 Mar 2016 16:37:21 +0100
Subject: [PATCH] Added a reset function to OperationCursor. ALso added a
 switch to getMore to define that all documents are referenced as Externals
 instead of inplace

---
 arangod/Utils/OperationCursor.cpp | 15 +++++++++++++--
 arangod/Utils/OperationCursor.h   |  8 +++++++-
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/arangod/Utils/OperationCursor.cpp b/arangod/Utils/OperationCursor.cpp
index f884575ed0..d729ca4bfd 100644
--- a/arangod/Utils/OperationCursor.cpp
+++ b/arangod/Utils/OperationCursor.cpp
@@ -25,6 +25,11 @@
 
 using namespace arangodb;
 
+
+void OperationCursor::reset() {
+  _indexIterator->reset();
+}
+
 //////////////////////////////////////////////////////////////////////////////
 /// @brief Get next default batchSize many elements.
 ///        Check hasMore()==true before using this
@@ -38,10 +43,12 @@ int OperationCursor::getMore() {
 //////////////////////////////////////////////////////////////////////////////
 /// @brief Get next batchSize many elements.
 ///        Check hasMore()==true before using this
+///        If useExternals is set to true all elements in the vpack are
+///        externals. Otherwise they are inlined.
 ///        NOTE: This will throw on OUT_OF_MEMORY
 //////////////////////////////////////////////////////////////////////////////
 
-int OperationCursor::getMore(uint64_t batchSize) {
+int OperationCursor::getMore(uint64_t batchSize, bool useExternals) {
   // This may throw out of memory
   if (!hasMore()) {
     TRI_ASSERT(false);
@@ -56,7 +63,11 @@ int OperationCursor::getMore(uint64_t batchSize) {
   while (batchSize > 0 && _limit > 0 && (mptr = _indexIterator->next()) != nullptr) {
     --batchSize;
     --_limit;
-    _builder.add(VPackSlice(mptr->vpack()));
+    if (useExternals) {
+      _builder.add(VPackValue(mptr->vpack(), VPackValueType::External));
+    } else {
+      _builder.add(VPackSlice(mptr->vpack()));
+    }
   }
   if (batchSize > 0 || _limit == 0) {
     // Iterator empty, there is no more
diff --git a/arangod/Utils/OperationCursor.h b/arangod/Utils/OperationCursor.h
index fdf58f8445..9c33b6d875 100644
--- a/arangod/Utils/OperationCursor.h
+++ b/arangod/Utils/OperationCursor.h
@@ -94,13 +94,19 @@ struct OperationCursor : public OperationResult {
     return _hasMore;
   }
 
+//////////////////////////////////////////////////////////////////////////////
+/// @brief Reset the cursor
+//////////////////////////////////////////////////////////////////////////////
+
+  void reset();
+
 //////////////////////////////////////////////////////////////////////////////
 /// @brief Get next batchSize many elements.
 ///        Check hasMore()==true before using this
 ///        NOTE: This will throw on OUT_OF_MEMORY
 //////////////////////////////////////////////////////////////////////////////
 
-  int getMore(uint64_t);
+  int getMore(uint64_t, bool useExternals = false);
 
 //////////////////////////////////////////////////////////////////////////////
 /// @brief Get next default batchSize many elements.