| /* |
| * 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.cassandra.spark.utils.streaming; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * A generic wrapper around bytes to allow for on/off-heap byte arrays, |
| * whichever the underlying {@link SSTableSource} implementation uses |
| */ |
| public interface StreamBuffer |
| { |
| void getBytes(int index, ByteBuffer destination, int length); |
| |
| void getBytes(int index, byte[] destination, int destinationIndex, int length); |
| |
| byte getByte(int index); |
| |
| int readableBytes(); |
| |
| void release(); |
| |
| static ByteArrayWrapper wrap(byte[] bytes) |
| { |
| return new ByteArrayWrapper(bytes); |
| } |
| |
| class ByteArrayWrapper implements StreamBuffer |
| { |
| private final byte[] bytes; |
| |
| private ByteArrayWrapper(byte[] bytes) |
| { |
| this.bytes = bytes; |
| } |
| |
| @Override |
| public void getBytes(int index, ByteBuffer destination, int length) |
| { |
| destination.put(bytes, index, length); |
| } |
| |
| @Override |
| public void getBytes(int index, byte[] destination, int destinationIndex, int length) |
| { |
| System.arraycopy(bytes, index, destination, destinationIndex, length); |
| } |
| |
| @Override |
| public byte getByte(int index) |
| { |
| return bytes[index]; |
| } |
| |
| @Override |
| public int readableBytes() |
| { |
| return bytes.length; |
| } |
| |
| @Override |
| public void release() |
| { |
| } |
| } |
| } |