diff options
Diffstat (limited to 'jimfs/src/main/java/com/google/common/jimfs/DowngradedSeekableByteChannel.java')
-rw-r--r-- | jimfs/src/main/java/com/google/common/jimfs/DowngradedSeekableByteChannel.java | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/jimfs/src/main/java/com/google/common/jimfs/DowngradedSeekableByteChannel.java b/jimfs/src/main/java/com/google/common/jimfs/DowngradedSeekableByteChannel.java new file mode 100644 index 0000000..5d4db8b --- /dev/null +++ b/jimfs/src/main/java/com/google/common/jimfs/DowngradedSeekableByteChannel.java @@ -0,0 +1,81 @@ +/* + * Copyright 2014 Google 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 com.google.common.jimfs; + +import static com.google.common.base.Preconditions.checkNotNull; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; +import java.nio.channels.SeekableByteChannel; + +/** + * A thin wrapper around a {@link FileChannel} that exists only to implement {@link + * SeekableByteChannel} but NOT extend {@link FileChannel}. + * + * @author Colin Decker + */ +final class DowngradedSeekableByteChannel implements SeekableByteChannel { + + private final FileChannel channel; + + DowngradedSeekableByteChannel(FileChannel channel) { + this.channel = checkNotNull(channel); + } + + @Override + public int read(ByteBuffer dst) throws IOException { + return channel.read(dst); + } + + @Override + public int write(ByteBuffer src) throws IOException { + return channel.write(src); + } + + @Override + public long position() throws IOException { + return channel.position(); + } + + @Override + public SeekableByteChannel position(long newPosition) throws IOException { + channel.position(newPosition); + return this; + } + + @Override + public long size() throws IOException { + return channel.size(); + } + + @Override + public SeekableByteChannel truncate(long size) throws IOException { + channel.truncate(size); + return this; + } + + @Override + public boolean isOpen() { + return channel.isOpen(); + } + + @Override + public void close() throws IOException { + channel.close(); + } +} |