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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.felix.bundleplugin;
20  
21  
22  import java.io.BufferedReader;
23  import java.io.ByteArrayInputStream;
24  import java.io.ByteArrayOutputStream;
25  import java.io.IOException;
26  import java.io.InputStream;
27  import java.io.InputStreamReader;
28  import java.net.URL;
29  import java.util.HashSet;
30  import java.util.Map;
31  import java.util.Set;
32  
33  import javax.xml.transform.Transformer;
34  import javax.xml.transform.TransformerFactory;
35  import javax.xml.transform.stream.StreamResult;
36  import javax.xml.transform.stream.StreamSource;
37  
38  import aQute.bnd.osgi.Analyzer;
39  import aQute.bnd.osgi.Processor;
40  import aQute.bnd.osgi.Resource;
41  import aQute.bnd.service.AnalyzerPlugin;
42  import aQute.libg.generics.Create;
43  
44  /**
45   * Create capabilities for DS components
46   * @deprecated bnd generates these as well.
47   */
48  @Deprecated
49  public class ScrPlugin implements AnalyzerPlugin
50  {
51  
52      Transformer transformer;
53  
54      public ScrPlugin() throws Exception
55      {
56          transformer = getTransformer( getClass().getResource( "scr.xsl" ) );
57      }
58  
59  
60      public boolean analyzeJar( Analyzer analyzer ) throws Exception
61      {
62          Set<String> headers = Create.set();
63  
64          String bpHeader = analyzer.getProperty( "Service-Component" );
65  
66          Map<String, ? extends Map<String, String>> map = Processor.parseHeader( bpHeader, null );
67          for ( String root : map.keySet() )
68          {
69              Resource resource = analyzer.getJar().getResource(root);
70              if ( resource != null ) {
71                  process(analyzer, root, resource, headers);
72              }
73          }
74  
75          // Group and analyze
76          for ( String str : headers )
77          {
78              int idx = str.indexOf( ':' );
79              if ( idx < 0 )
80              {
81                  analyzer.warning( ( new StringBuilder( "Error analyzing services in scr resource: " ) ).append( str ).toString() );
82                  continue;
83              }
84              String h = str.substring( 0, idx ).trim();
85              String v = str.substring( idx + 1 ).trim();
86  
87              StringBuilder sb = new StringBuilder();
88              String header = analyzer.getProperty( h );
89              if (header != null && !header.isEmpty())
90              {
91                  sb.append(header);
92                  sb.append(",");
93              }
94              sb.append( v );
95              analyzer.setProperty(h, sb.toString());
96          }
97          return false;
98      }
99  
100 
101     private void process( Analyzer analyzer, String path, Resource resource, Set<String> headers )
102     {
103         InputStream in = null;
104         try
105         {
106             in = resource.openInputStream();
107 
108             // Retrieve headers
109             Set<String> set = analyze( in );
110             headers.addAll( set );
111         }
112         catch ( Exception e )
113         {
114             analyzer.error( ( new StringBuilder( "Unexpected exception in processing scr resources(" ) )
115                 .append( path ).append( "): " ).append( e ).toString() );
116         }
117         finally
118         {
119             try
120             {
121                 if ( in != null )
122                 {
123                     in.close();
124                 }
125             }
126             catch ( IOException e )
127             {
128             }
129         }
130     }
131 
132 
133     public Set<String> analyze( InputStream in ) throws Exception
134     {
135         Set<String> refers = new HashSet<String>();
136         ByteArrayOutputStream bout = new ByteArrayOutputStream();
137         javax.xml.transform.Result r = new StreamResult( bout );
138         javax.xml.transform.Source s = new StreamSource( in );
139         transformer.transform( s, r );
140         ByteArrayInputStream bin = new ByteArrayInputStream( bout.toByteArray() );
141         bout.close();
142         BufferedReader br = new BufferedReader( new InputStreamReader( bin ) );
143         for ( String line = br.readLine(); line != null; line = br.readLine() )
144         {
145             line = line.trim();
146             if ( line.length() > 0 )
147             {
148                 refers.add( line );
149             }
150         }
151 
152         br.close();
153         return refers;
154     }
155 
156 
157     protected Transformer getTransformer( URL url ) throws Exception
158     {
159         TransformerFactory tf = TransformerFactory.newInstance();
160         javax.xml.transform.Source source = new StreamSource( url.openStream() );
161         return tf.newTransformer( source );
162     }
163 
164 }