| /* |
| * 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.hugegraph.util; |
| |
| import java.util.zip.DataFormatException; |
| import java.util.zip.Deflater; |
| import java.util.zip.Inflater; |
| |
| import org.apache.commons.codec.digest.DigestUtils; |
| |
| import org.apache.hugegraph.backend.BackendException; |
| import org.apache.hugegraph.backend.serializer.BytesBuffer; |
| |
| public final class GZipUtil { |
| |
| private static final int BUF_SIZE = (int) (4 * Bytes.KB); |
| |
| public static String md5(String input) { |
| return DigestUtils.md5Hex(input); |
| } |
| |
| public static BytesBuffer compress(byte[] data) { |
| int estimateSize = data.length >> 3; |
| BytesBuffer output = BytesBuffer.allocate(estimateSize); |
| |
| Deflater deflater = new Deflater(); |
| deflater.setInput(data); |
| deflater.finish(); |
| byte[] buffer = new byte[BUF_SIZE]; |
| while (!deflater.finished()) { |
| int count = deflater.deflate(buffer); |
| output.write(buffer, 0, count); |
| } |
| output.forReadWritten(); |
| return output; |
| } |
| |
| public static BytesBuffer decompress(byte[] data) { |
| int estimateSize = data.length << 3; |
| BytesBuffer output = BytesBuffer.allocate(estimateSize); |
| |
| Inflater inflater = new Inflater(); |
| inflater.setInput(data); |
| byte[] buffer = new byte[BUF_SIZE]; |
| while (!inflater.finished()) { |
| try { |
| int count = inflater.inflate(buffer); |
| output.write(buffer, 0, count); |
| } catch (DataFormatException e) { |
| throw new BackendException("Failed to decompress", e); |
| } |
| } |
| output.forReadWritten(); |
| return output; |
| } |
| } |