Squashed 'third_party/flatbuffers/' content from commit acc9990ab
Change-Id: I48550d40d78fea996ebe74e9723a5d1f910de491
git-subtree-dir: third_party/flatbuffers
git-subtree-split: acc9990abd2206491480291b0f85f925110102ea
diff --git a/java/com/google/flatbuffers/ByteBufferUtil.java b/java/com/google/flatbuffers/ByteBufferUtil.java
new file mode 100644
index 0000000..624dc4e
--- /dev/null
+++ b/java/com/google/flatbuffers/ByteBufferUtil.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2017 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.flatbuffers;
+
+import static com.google.flatbuffers.Constants.*;
+
+import java.nio.ByteBuffer;
+
+/// @file
+/// @addtogroup flatbuffers_java_api
+/// @{
+
+/**
+ * Class that collects utility functions around `ByteBuffer`.
+ */
+public class ByteBufferUtil {
+
+ /**
+ * Extract the size prefix from a `ByteBuffer`.
+ *
+ * @param bb a size-prefixed buffer
+ * @return the size prefix
+ */
+ public static int getSizePrefix(ByteBuffer bb) {
+ return bb.getInt(bb.position());
+ }
+
+ /**
+ * Create a duplicate of a size-prefixed `ByteBuffer` that has its position
+ * advanced just past the size prefix.
+ *
+ * @param bb a size-prefixed buffer
+ * @return a new buffer on the same underlying data that has skipped the
+ * size prefix
+ */
+ public static ByteBuffer removeSizePrefix(ByteBuffer bb) {
+ ByteBuffer s = bb.duplicate();
+ s.position(s.position() + SIZE_PREFIX_LENGTH);
+ return s;
+ }
+
+}
+
+/// @}