| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.lucene.mockfile; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.nio.MappedByteBuffer; |
| import java.nio.channels.FileChannel; |
| import java.nio.channels.FileLock; |
| import java.nio.channels.ReadableByteChannel; |
| import java.nio.channels.WritableByteChannel; |
| import java.util.Objects; |
| |
| /** |
| * A {@code FilterFileChannel} contains another |
| * {@code FileChannel}, which it uses as its basic |
| * source of data, possibly transforming the data along the |
| * way or providing additional functionality. |
| */ |
| public abstract class FilterFileChannel extends FileChannel { |
| |
| /** |
| * The underlying {@code FileChannel} instance. |
| */ |
| protected final FileChannel delegate; |
| |
| /** |
| * Construct a {@code FilterFileChannel} based on |
| * the specified base channel. |
| * <p> |
| * Note that base channel is closed if this channel is closed. |
| * @param delegate specified base channel. |
| */ |
| public FilterFileChannel(FileChannel delegate) { |
| this.delegate = Objects.requireNonNull(delegate); |
| } |
| |
| @Override |
| public int read(ByteBuffer dst) throws IOException { |
| return delegate.read(dst); |
| } |
| |
| @Override |
| public long read(ByteBuffer[] dsts, int offset, int length) throws IOException { |
| return delegate.read(dsts, offset, length); |
| } |
| |
| @Override |
| public int write(ByteBuffer src) throws IOException { |
| return delegate.write(src); |
| } |
| |
| @Override |
| public long write(ByteBuffer[] srcs, int offset, int length) throws IOException { |
| return delegate.write(srcs, offset, length); |
| } |
| |
| @Override |
| public long position() throws IOException { |
| return delegate.position(); |
| } |
| |
| @Override |
| public FileChannel position(long newPosition) throws IOException { |
| delegate.position(newPosition); |
| return this; |
| } |
| |
| @Override |
| public long size() throws IOException { |
| return delegate.size(); |
| } |
| |
| @Override |
| public FileChannel truncate(long size) throws IOException { |
| delegate.truncate(size); |
| return this; |
| } |
| |
| @Override |
| public void force(boolean metaData) throws IOException { |
| delegate.force(metaData); |
| } |
| |
| @Override |
| public long transferTo(long position, long count, WritableByteChannel target) throws IOException { |
| return delegate.transferTo(position, count, target); |
| } |
| |
| @Override |
| public long transferFrom(ReadableByteChannel src, long position, long count) throws IOException { |
| return delegate.transferFrom(src, position, count); |
| } |
| |
| @Override |
| public int read(ByteBuffer dst, long position) throws IOException { |
| return delegate.read(dst, position); |
| } |
| |
| @Override |
| public int write(ByteBuffer src, long position) throws IOException { |
| return delegate.write(src, position); |
| } |
| |
| @Override |
| public MappedByteBuffer map(MapMode mode, long position, long size) throws IOException { |
| return delegate.map(mode, position, size); |
| } |
| |
| @Override |
| public FileLock lock(long position, long size, boolean shared) throws IOException { |
| return delegate.lock(position, size, shared); |
| } |
| |
| @Override |
| public FileLock tryLock(long position, long size, boolean shared) throws IOException { |
| return delegate.tryLock(position, size, shared); |
| } |
| |
| @Override |
| protected void implCloseChannel() throws IOException { |
| // we can't call implCloseChannel, but calling this instead is "ok": |
| // http://mail.openjdk.java.net/pipermail/nio-dev/2015-September/003322.html |
| delegate.close(); |
| } |
| } |