| /* |
| * 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; |
| } |
| |
| } |
| |
| /// @} |