| /** |
| * 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.distributedlog.io; |
| |
| /** |
| * Utils for compression related operations. |
| */ |
| public class CompressionUtils { |
| |
| public static final String LZ4 = "lz4"; |
| public static final String NONE = "none"; |
| |
| /** |
| * Get a cached compression codec instance for the specified type. |
| * @param type compression codec type |
| * @return compression codec instance |
| */ |
| public static CompressionCodec getCompressionCodec(CompressionCodec.Type type) { |
| if (type == CompressionCodec.Type.LZ4) { |
| return LZ4CompressionCodec.of(); |
| } |
| // No Compression |
| return IdentityCompressionCodec.of(); |
| } |
| |
| /** |
| * Compression type value from string. |
| * @param compressionString compression codec presentation in string |
| * @return compression codec type |
| */ |
| public static CompressionCodec.Type stringToType(String compressionString) { |
| if (compressionString.equals(LZ4)) { |
| return CompressionCodec.Type.LZ4; |
| } else if (compressionString.equals(NONE)) { |
| return CompressionCodec.Type.NONE; |
| } else { |
| return CompressionCodec.Type.UNKNOWN; |
| } |
| } |
| } |