| /* |
| * 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.streaming.compress; |
| |
| import java.io.DataInput; |
| import java.io.IOException; |
| |
| import org.apache.cassandra.db.TypeSizes; |
| import org.apache.cassandra.io.IVersionedSerializer; |
| import org.apache.cassandra.io.compress.CompressionMetadata; |
| import org.apache.cassandra.io.compress.CompressionParameters; |
| import org.apache.cassandra.io.util.DataOutputPlus; |
| |
| /** |
| * Container that carries compression parameters and chunks to decompress data from stream. |
| */ |
| public class CompressionInfo |
| { |
| public static final IVersionedSerializer<CompressionInfo> serializer = new CompressionInfoSerializer(); |
| |
| public final CompressionMetadata.Chunk[] chunks; |
| public final CompressionParameters parameters; |
| |
| public CompressionInfo(CompressionMetadata.Chunk[] chunks, CompressionParameters parameters) |
| { |
| assert chunks != null && parameters != null; |
| this.chunks = chunks; |
| this.parameters = parameters; |
| } |
| |
| static class CompressionInfoSerializer implements IVersionedSerializer<CompressionInfo> |
| { |
| public void serialize(CompressionInfo info, DataOutputPlus out, int version) throws IOException |
| { |
| if (info == null) |
| { |
| out.writeInt(-1); |
| return; |
| } |
| |
| int chunkCount = info.chunks.length; |
| out.writeInt(chunkCount); |
| for (int i = 0; i < chunkCount; i++) |
| CompressionMetadata.Chunk.serializer.serialize(info.chunks[i], out, version); |
| // compression params |
| CompressionParameters.serializer.serialize(info.parameters, out, version); |
| } |
| |
| public CompressionInfo deserialize(DataInput in, int version) throws IOException |
| { |
| // chunks |
| int chunkCount = in.readInt(); |
| if (chunkCount < 0) |
| return null; |
| |
| CompressionMetadata.Chunk[] chunks = new CompressionMetadata.Chunk[chunkCount]; |
| for (int i = 0; i < chunkCount; i++) |
| chunks[i] = CompressionMetadata.Chunk.serializer.deserialize(in, version); |
| |
| // compression params |
| CompressionParameters parameters = CompressionParameters.serializer.deserialize(in, version); |
| return new CompressionInfo(chunks, parameters); |
| } |
| |
| public long serializedSize(CompressionInfo info, int version) |
| { |
| if (info == null) |
| return TypeSizes.NATIVE.sizeof(-1); |
| |
| // chunks |
| int chunkCount = info.chunks.length; |
| long size = TypeSizes.NATIVE.sizeof(chunkCount); |
| for (int i = 0; i < chunkCount; i++) |
| size += CompressionMetadata.Chunk.serializer.serializedSize(info.chunks[i], version); |
| // compression params |
| size += CompressionParameters.serializer.serializedSize(info.parameters, version); |
| return size; |
| } |
| } |
| } |