1 package org.apache.archiva.checksum; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import java.io.File; 23 24 import org.apache.commons.io.FilenameUtils; 25 26 /** 27 * Enumeration of available ChecksumAlgorithm techniques. 28 * 29 * @version $Id: ChecksumAlgorithm.java 718864 2008-11-19 06:33:35Z brett $ 30 */ 31 public enum ChecksumAlgorithm { 32 SHA1("SHA-1", "sha1", "SHA1"), 33 MD5("MD5", "md5", "MD5"); 34 35 public static ChecksumAlgorithm getByExtension( File file ) 36 { 37 String ext = FilenameUtils.getExtension( file.getName() ).toLowerCase(); 38 if ( ChecksumAlgorithm.SHA1.getExt().equals( ext ) ) 39 { 40 return ChecksumAlgorithm.SHA1; 41 } 42 else if ( ChecksumAlgorithm.MD5.getExt().equals( ext ) ) 43 { 44 return ChecksumAlgorithm.MD5; 45 } 46 47 throw new IllegalArgumentException( "Filename " + file.getName() + " has no associated extension." ); 48 } 49 50 /** 51 * The MessageDigest algorithm for this hash. 52 */ 53 private String algorithm; 54 55 /** 56 * The file extension for this ChecksumAlgorithm. 57 */ 58 private String ext; 59 60 /** 61 * The checksum type, the key that you see in checksum files. 62 */ 63 private String type; 64 65 /** 66 * Construct a ChecksumAlgorithm 67 * 68 * @param algorithm the MessageDigest algorithm 69 * @param ext the file extension. 70 * @param type the checksum type. 71 */ 72 private ChecksumAlgorithm( String algorithm, String ext, String type ) 73 { 74 this.algorithm = algorithm; 75 this.ext = ext; 76 this.type = type; 77 } 78 79 public String getAlgorithm() 80 { 81 return algorithm; 82 } 83 84 public String getExt() 85 { 86 return ext; 87 } 88 89 public String getType() 90 { 91 return type; 92 } 93 94 95 }