| // Protocol Buffers - Google's data interchange format |
| // Copyright 2008 Google Inc. All rights reserved. |
| // https://developers.google.com/protocol-buffers/ |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| package com.google.protobuf; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * An object responsible for allocation of buffers. This is an extension point to enable buffer |
| * pooling within an application. |
| */ |
| @ExperimentalApi |
| abstract class BufferAllocator { |
| private static final BufferAllocator UNPOOLED = |
| new BufferAllocator() { |
| @Override |
| public AllocatedBuffer allocateHeapBuffer(int capacity) { |
| return AllocatedBuffer.wrap(new byte[capacity]); |
| } |
| |
| @Override |
| public AllocatedBuffer allocateDirectBuffer(int capacity) { |
| return AllocatedBuffer.wrap(ByteBuffer.allocateDirect(capacity)); |
| } |
| }; |
| |
| /** Returns an unpooled buffer allocator, which will create a new buffer for each request. */ |
| public static BufferAllocator unpooled() { |
| return UNPOOLED; |
| } |
| |
| /** Allocates a buffer with the given capacity that is backed by an array on the heap. */ |
| public abstract AllocatedBuffer allocateHeapBuffer(int capacity); |
| |
| /** Allocates a direct (i.e. non-heap) buffer with the given capacity. */ |
| public abstract AllocatedBuffer allocateDirectBuffer(int capacity); |
| } |