/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in compliance with the License, which is
* available at www.apache.org/licenses/LICENSE-2.0
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied, as more fully set forth in the License.
*
* See the NOTICE file distributed with this work for information regarding copyright ownership.
*/
package alluxio.worker.block.io;
import io.netty.buffer.ByteBuf;
import java.io.ByteArrayInputStream;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
/**
* A simple {@link BlockReader} to use for testing purposes.
*/
public final class MockBlockReader implements BlockReader {
private final byte[] mBytes;
/**
* Constructs a mock block reader which will read the given data.
*
* @param bytes the bytes to read from
*/
public MockBlockReader(byte[] bytes) {
mBytes = bytes;
}
@Override
public void close() {
// no-op
}
@Override
public ByteBuffer read(long offset, long length) {
return ByteBuffer.wrap(mBytes, (int) offset, (int) length);
}
@Override
public int transferTo(ByteBuf buf) {
int remaining = buf.readableBytes();
return buf.writeBytes(mBytes).readableBytes() - remaining;
}
public boolean isClosed() {
return false;
}
@Override
public long getLength() {
return mBytes.length;
}
@Override
public ReadableByteChannel getChannel() {
return Channels.newChannel(new ByteArrayInputStream(mBytes));
}
}