| // 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.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.Queue; |
| |
| /** Utilities for serialization. */ |
| public class ExperimentalSerializationUtil { |
| |
| /** |
| * Serializes the given message to a byte array using {@link com.google.protobuf.BinaryWriter}. |
| */ |
| public static <T> byte[] toByteArray(T msg) throws IOException { |
| return toByteArray(msg, Protobuf.getInstance().schemaFor(msg)); |
| } |
| |
| /** |
| * Serializes the given message to a byte array using {@link com.google.protobuf.BinaryWriter} |
| * with a customized Schema. |
| */ |
| public static <T> byte[] toByteArray(T msg, Schema<T> schema) throws IOException { |
| BinaryWriter writer = BinaryWriter.newHeapInstance(BufferAllocator.unpooled()); |
| schema.writeTo(msg, writer); |
| |
| byte[] out = new byte[writer.getTotalBytesWritten()]; |
| int outPos = 0; |
| Queue<AllocatedBuffer> buffers = writer.complete(); |
| while (true) { |
| AllocatedBuffer buffer = buffers.poll(); |
| if (buffer == null) { |
| break; |
| } |
| int length = buffer.limit() - buffer.position(); |
| System.arraycopy( |
| buffer.array(), buffer.arrayOffset() + buffer.position(), out, outPos, length); |
| outPos += length; |
| } |
| if (out.length != outPos) { |
| throw new IllegalArgumentException("Failed to serialize test message"); |
| } |
| return out; |
| } |
| |
| /** Deserializes a message from the given byte array. */ |
| public static <T> T fromByteArray(byte[] data, Class<T> messageType) { |
| if (Android.isOnAndroidDevice()) { |
| return fromByteArrayFastPath(data, messageType); |
| } else { |
| return fromByteArray(data, messageType, ExtensionRegistryLite.getEmptyRegistry()); |
| } |
| } |
| |
| /** |
| * Deserializes a message from the given byte array using {@link com.google.protobuf.BinaryReader} |
| * with an extension registry and a customized Schema. |
| */ |
| public static <T> T fromByteArray( |
| byte[] data, Class<T> messageType, ExtensionRegistryLite extensionRegistry) { |
| try { |
| Schema<T> schema = Protobuf.getInstance().schemaFor(messageType); |
| T msg = schema.newInstance(); |
| schema.mergeFrom( |
| msg, BinaryReader.newInstance(ByteBuffer.wrap(data), true), extensionRegistry); |
| schema.makeImmutable(msg); |
| return msg; |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** Deserializes a lite message from the given byte array using fast path. */ |
| private static <T> T fromByteArrayFastPath(byte[] data, Class<T> messageType) { |
| try { |
| Schema<T> schema = Protobuf.getInstance().schemaFor(messageType); |
| T msg = schema.newInstance(); |
| schema.mergeFrom(msg, data, 0, data.length, new ArrayDecoders.Registers()); |
| schema.makeImmutable(msg); |
| return msg; |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |