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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.discovery.ant;
18  
19  import java.util.Vector;
20  
21  import org.apache.commons.discovery.ResourceNameIterator;
22  import org.apache.commons.discovery.jdk.JDKHooks;
23  import org.apache.commons.discovery.resource.DiscoverResources;
24  
25  
26  /***
27   * Small ant task that will use discovery to locate a particular impl.
28   * and display all values.
29   *
30   * You can execute this and save it with an id, then other classes can use it.
31   *
32   * @author Costin Manolache
33   */
34  public class ServiceDiscoveryTask
35  {
36      String name;
37      int debug=0;
38      String[] drivers = null;
39          
40      public void setServiceName(String name ) {
41          this.name=name;
42      }
43  
44      public void setDebug(int i) {
45          this.debug=i;
46      }
47  
48      public String[] getServiceInfo() {
49          return drivers;
50      }
51  
52      public void execute() throws Exception {
53          System.out.println("XXX ");
54          
55          DiscoverResources disc = new DiscoverResources();
56          disc.addClassLoader( JDKHooks.getJDKHooks().getThreadContextClassLoader() );
57          disc.addClassLoader( this.getClass().getClassLoader() );
58          
59          ResourceNameIterator iterator = disc.findResources(name);
60  
61          Vector vector = new Vector();
62          while (iterator.hasNext()) {
63              String resourceInfo = iterator.nextResourceName();
64              vector.add(resourceInfo);
65              if( debug > 0 ) {
66                  System.out.println("Found " + resourceInfo);
67              }
68          }
69          
70          drivers = new String[vector.size()];
71          vector.copyInto(drivers);
72      }
73          
74  }