| /* |
| * 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.channels.SeekableByteChannel; |
| |
| /** |
| * A {@code FilterSeekableByteChannel} contains another |
| * {@code SeekableByteChannel}, which it uses as its basic |
| * source of data, possibly transforming the data along the |
| * way or providing additional functionality. |
| */ |
| public class FilterSeekableByteChannel implements SeekableByteChannel { |
| |
| /** |
| * The underlying {@code SeekableByteChannel} instance. |
| */ |
| protected final SeekableByteChannel delegate; |
| |
| /** |
| * Construct a {@code FilterSeekableByteChannel} based on |
| * the specified base channel. |
| * <p> |
| * Note that base channel is closed if this channel is closed. |
| * @param delegate specified base channel. |
| */ |
| public FilterSeekableByteChannel(SeekableByteChannel delegate) { |
| this.delegate = delegate; |
| } |
| |
| @Override |
| public boolean isOpen() { |
| return delegate.isOpen(); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| delegate.close(); |
| } |
| |
| @Override |
| public int read(ByteBuffer dst) throws IOException { |
| return delegate.read(dst); |
| } |
| |
| @Override |
| public int write(ByteBuffer src) throws IOException { |
| return delegate.write(src); |
| } |
| |
| @Override |
| public long position() throws IOException { |
| return delegate.position(); |
| } |
| |
| @Override |
| public SeekableByteChannel position(long newPosition) throws IOException { |
| delegate.position(newPosition); |
| return this; |
| } |
| |
| @Override |
| public long size() throws IOException { |
| return delegate.size(); |
| } |
| |
| @Override |
| public SeekableByteChannel truncate(long size) throws IOException { |
| delegate.truncate(size); |
| return this; |
| } |
| } |