| /* |
| * Copyright (C) 2018 Square, Inc. |
| * |
| * 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 okio.samples; |
| |
| import java.io.IOException; |
| import java.nio.channels.FileChannel; |
| import java.nio.channels.ReadableByteChannel; |
| import okio.Buffer; |
| import okio.Sink; |
| import okio.Timeout; |
| |
| /** |
| * Special Sink for a FileChannel to take advantage of the |
| * {@link FileChannel#transferFrom(ReadableByteChannel, long, long) transfer} method available. |
| */ |
| final class FileChannelSink implements Sink { |
| private final FileChannel channel; |
| private final Timeout timeout; |
| |
| private long position; |
| |
| FileChannelSink(FileChannel channel, Timeout timeout) throws IOException { |
| this.channel = channel; |
| this.timeout = timeout; |
| |
| this.position = channel.position(); |
| } |
| |
| @Override public void write(Buffer source, long byteCount) throws IOException { |
| if (!channel.isOpen()) throw new IllegalStateException("closed"); |
| if (byteCount == 0) return; |
| |
| long remaining = byteCount; |
| while (remaining > 0) { |
| long written = channel.transferFrom(source, position, remaining); |
| position += written; |
| remaining -= written; |
| } |
| } |
| |
| @Override public void flush() throws IOException { |
| // Cannot alter meta data through this Sink |
| channel.force(false); |
| } |
| |
| @Override public Timeout timeout() { |
| return timeout; |
| } |
| |
| @Override public void close() throws IOException { |
| channel.close(); |
| } |
| } |