| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| ProviderDetector |
|
| 4.666666666666667;4.667 |
| 1 | package org.apache.maven.plugin.surefire.booterclient; | |
| 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.BufferedReader; | |
| 23 | import java.io.IOException; | |
| 24 | import java.io.InputStream; | |
| 25 | import java.io.InputStreamReader; | |
| 26 | import java.net.URL; | |
| 27 | import java.util.Enumeration; | |
| 28 | import java.util.HashSet; | |
| 29 | import java.util.Set; | |
| 30 | ||
| 31 | /** | |
| 32 | * @author Stephen Conolly | |
| 33 | * @author Kristian Rosenvold | |
| 34 | * @noinspection UnusedDeclaration | |
| 35 | */ | |
| 36 | 0 | public class ProviderDetector |
| 37 | { | |
| 38 | ||
| 39 | public static Set getServiceNames( Class clazz, ClassLoader classLoader ) | |
| 40 | throws IOException | |
| 41 | { | |
| 42 | 0 | final String resourceName = "META-INF/services/" + clazz.getName(); |
| 43 | ||
| 44 | 0 | if ( classLoader == null ) |
| 45 | { | |
| 46 | 0 | return new HashSet( ); |
| 47 | } | |
| 48 | 0 | final Enumeration urlEnumeration = classLoader.getResources( resourceName ); |
| 49 | 0 | return getNames( urlEnumeration ); |
| 50 | } | |
| 51 | ||
| 52 | ||
| 53 | /** | |
| 54 | * Method loadServices loads the services of a class that are | |
| 55 | * defined using the SPI mechanism. | |
| 56 | * | |
| 57 | * @param urlEnumeration The urls from the resource | |
| 58 | * @throws IOException When reading the streams fails | |
| 59 | * @return The set of service provider names | |
| 60 | */ | |
| 61 | private static Set getNames( final Enumeration urlEnumeration ) | |
| 62 | throws IOException | |
| 63 | { | |
| 64 | 0 | final Set names = new HashSet(); |
| 65 | nextUrl: | |
| 66 | 0 | while ( urlEnumeration.hasMoreElements() ) |
| 67 | { | |
| 68 | 0 | final URL url = (URL) urlEnumeration.nextElement(); |
| 69 | 0 | final BufferedReader reader = getReader( url ); |
| 70 | try | |
| 71 | { | |
| 72 | String line; | |
| 73 | 0 | while ( ( line = reader.readLine() ) != null ) |
| 74 | { | |
| 75 | 0 | int ci = line.indexOf( '#' ); |
| 76 | 0 | if ( ci >= 0 ) |
| 77 | { | |
| 78 | 0 | line = line.substring( 0, ci ); |
| 79 | } | |
| 80 | 0 | line = line.trim(); |
| 81 | 0 | int n = line.length(); |
| 82 | 0 | if ( n == 0 ) |
| 83 | { | |
| 84 | 0 | continue; // next line |
| 85 | } | |
| 86 | ||
| 87 | 0 | if ( ( line.indexOf( ' ' ) >= 0 ) || ( line.indexOf( '\t' ) >= 0 ) ) |
| 88 | { | |
| 89 | continue nextUrl; // next url | |
| 90 | } | |
| 91 | 0 | char cp = line.charAt( 0 ); // should use codePointAt but this is JDK1.3 |
| 92 | 0 | if ( !Character.isJavaIdentifierStart( cp ) ) |
| 93 | { | |
| 94 | continue nextUrl; // next url | |
| 95 | } | |
| 96 | 0 | for ( int i = 1; i < n; i++ ) |
| 97 | { | |
| 98 | 0 | cp = line.charAt( i ); // should use codePointAt but this is JDK1.3 |
| 99 | 0 | if ( !Character.isJavaIdentifierPart( cp ) && ( cp != '.' ) ) |
| 100 | { | |
| 101 | continue nextUrl; // next url | |
| 102 | } | |
| 103 | } | |
| 104 | 0 | if ( !names.contains( line ) ) |
| 105 | { | |
| 106 | 0 | names.add( line ); |
| 107 | } | |
| 108 | 0 | } |
| 109 | } | |
| 110 | finally | |
| 111 | { | |
| 112 | 0 | reader.close(); |
| 113 | 0 | } |
| 114 | 0 | } |
| 115 | ||
| 116 | 0 | return names; |
| 117 | } | |
| 118 | ||
| 119 | ||
| 120 | private static BufferedReader getReader( URL url ) | |
| 121 | throws IOException | |
| 122 | { | |
| 123 | 0 | final InputStream inputStream = url.openStream(); |
| 124 | 0 | final InputStreamReader inputStreamReader = new InputStreamReader( inputStream ); |
| 125 | 0 | return new BufferedReader( inputStreamReader ); |
| 126 | } | |
| 127 | ||
| 128 | ||
| 129 | } |