From 9c169083adb77b7ab046daa1600ba283a786e90f Mon Sep 17 00:00:00 2001
From: Florian Enner <florian@enner.org>
Date: Wed, 28 Jan 2015 23:32:41 -0500
Subject: [PATCH] Added FlatBufferBuilder reuse

init resets internal variables, but keeps memory that has been allocated
for temporary storage

Change-Id: If2aa7d27de3c2717cf4c82b1e4e4b6732e495cea
---
 java/com/google/flatbuffers/FlatBufferBuilder.java | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/java/com/google/flatbuffers/FlatBufferBuilder.java b/java/com/google/flatbuffers/FlatBufferBuilder.java
index 9f3f4b4..44ef1d9 100644
--- a/java/com/google/flatbuffers/FlatBufferBuilder.java
+++ b/java/com/google/flatbuffers/FlatBufferBuilder.java
@@ -59,10 +59,29 @@ public class FlatBufferBuilder {
      * @param existing_bb The byte buffer to reuse
      */
     public FlatBufferBuilder(ByteBuffer existing_bb) {
+        init(existing_bb);
+    }
+
+    /**
+     * Alternative initializer that allows reusing this object on an existing
+     * ByteBuffer. This method resets the builder's internal state, but keeps
+     * objects that have been allocated for temporary storage.
+     *
+     * @param existing_bb The byte buffer to reuse
+     * @return this
+     */
+    public FlatBufferBuilder init(ByteBuffer existing_bb){
         bb = existing_bb;
         bb.clear();
         bb.order(ByteOrder.LITTLE_ENDIAN);
+        minalign = 1;
         space = bb.capacity();
+        vtable_in_use = 0;
+        nested = false;
+        object_start = 0;
+        num_vtables = 0;
+        vector_num_elems = 0;
+        return this;
     }
 
     static ByteBuffer newByteBuffer(int capacity) {
-- 
2.7.4