Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ServicesResourceTransformer |
|
| 2.0;2 |
1 | package org.apache.maven.plugins.shade.resource; | |
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.ByteArrayInputStream; | |
23 | import java.io.ByteArrayOutputStream; | |
24 | import java.io.IOException; | |
25 | import java.io.InputStream; | |
26 | import java.util.HashMap; | |
27 | import java.util.Iterator; | |
28 | import java.util.Map; | |
29 | import java.util.jar.JarEntry; | |
30 | import java.util.jar.JarOutputStream; | |
31 | ||
32 | import org.codehaus.plexus.util.IOUtil; | |
33 | ||
34 | /** | |
35 | * Resources transformer that appends entries in META-INF/services resources into | |
36 | * a single resource. For example, if there are several META-INF/services/org.apache.maven.project.ProjectBuilder | |
37 | * resources spread across many JARs the individual entries will all be concatenated into a single | |
38 | * META-INF/services/org.apache.maven.project.ProjectBuilder resource packaged into the resultant JAR produced | |
39 | * by the shading process. | |
40 | * | |
41 | * @author jvanzyl | |
42 | */ | |
43 | 0 | public class ServicesResourceTransformer |
44 | implements ResourceTransformer | |
45 | { | |
46 | private static final String SERVICES_PATH = "META-INF/services"; | |
47 | ||
48 | private ByteArrayOutputStream data; | |
49 | ||
50 | 0 | private Map serviceEntries = new HashMap(); |
51 | ||
52 | public boolean canTransformResource( String resource ) | |
53 | { | |
54 | 0 | if ( resource.startsWith( SERVICES_PATH ) ) |
55 | { | |
56 | 0 | data = (ByteArrayOutputStream) serviceEntries.get( resource ); |
57 | ||
58 | 0 | if ( data == null ) |
59 | { | |
60 | 0 | data = new ByteArrayOutputStream(); |
61 | 0 | serviceEntries.put( resource, data ); |
62 | } | |
63 | ||
64 | 0 | return true; |
65 | } | |
66 | ||
67 | 0 | return false; |
68 | } | |
69 | ||
70 | public void processResource( InputStream is ) | |
71 | throws IOException | |
72 | { | |
73 | 0 | IOUtil.copy( is, data ); |
74 | 0 | is.close(); |
75 | 0 | } |
76 | ||
77 | public boolean hasTransformedResource() | |
78 | { | |
79 | 0 | return serviceEntries.size() > 0; |
80 | } | |
81 | ||
82 | public void modifyOutputStream( JarOutputStream jos ) | |
83 | throws IOException | |
84 | { | |
85 | 0 | for ( Iterator i = serviceEntries.keySet().iterator(); i.hasNext(); ) |
86 | { | |
87 | 0 | String key = (String) i.next(); |
88 | 0 | ByteArrayOutputStream data = (ByteArrayOutputStream) serviceEntries.get( key ); |
89 | 0 | jos.putNextEntry( new JarEntry( key ) ); |
90 | 0 | IOUtil.copy( new ByteArrayInputStream( data.toByteArray() ), jos ); |
91 | 0 | data.reset(); |
92 | 0 | } |
93 | 0 | } |
94 | } |