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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   *
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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.james.transport;
20  import java.io.File;
21  import java.util.Vector;
22  
23  import org.apache.avalon.framework.activity.Initializable;
24  import org.apache.avalon.framework.configuration.Configurable;
25  import org.apache.avalon.framework.configuration.Configuration;
26  import org.apache.avalon.framework.configuration.ConfigurationException;
27  import org.apache.avalon.framework.context.Context;
28  import org.apache.avalon.framework.context.ContextException;
29  import org.apache.avalon.framework.context.Contextualizable;
30  import org.apache.avalon.framework.logger.AbstractLogEnabled;
31  import org.apache.avalon.framework.service.DefaultServiceManager;
32  import org.apache.avalon.framework.service.ServiceException;
33  import org.apache.avalon.framework.service.ServiceManager;
34  import org.apache.avalon.framework.service.Serviceable;
35  import org.apache.mailet.MailetContext;
36  
37  /***
38   *
39   * $Id: Loader.java 494012 2007-01-08 10:23:58Z norman $
40   */
41  public abstract class Loader extends AbstractLogEnabled implements Contextualizable, Serviceable, Configurable, Initializable {
42  
43      protected String baseDirectory = null;
44      protected final String MAILET_PACKAGE = "mailetpackage";
45      protected final String MATCHER_PACKAGE = "matcherpackage";
46      /***
47       * The list of packages that may contain Mailets or matchers
48       */
49      protected Vector packages;
50  
51      /***
52       * System service manager
53       */
54      private ServiceManager serviceManager;
55  
56      /***
57       * Mailet context
58       */
59      protected MailetContext mailetContext;
60  
61      /***
62       * @see org.apache.avalon.framework.context.Contextualizable#contextualize(Context)
63       */
64      public void contextualize(final Context context) throws ContextException 
65      {
66          try 
67          {
68              baseDirectory = ((File)context.get( "app.home") ).getCanonicalPath();
69          } 
70          catch (Throwable e) 
71          {
72              getLogger().error( "can't get base directory for mailet loader" );
73              throw new ContextException("can't contextualise mailet loader " + e.getMessage(), e);
74          }
75      }
76  
77      protected void getPackages(Configuration conf, String packageType)
78          throws ConfigurationException {
79          packages = new Vector();
80          packages.addElement("");
81          final Configuration[] pkgConfs = conf.getChildren(packageType);
82          for (int i = 0; i < pkgConfs.length; i++) {
83              Configuration c = pkgConfs[i];
84              String packageName = c.getValue();
85              if (!packageName.endsWith(".")) {
86                  packageName += ".";
87              }
88              packages.addElement(packageName);
89          }
90      }
91  
92      /***
93       * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
94       */
95      public void service(ServiceManager sm) throws ServiceException {
96          serviceManager = new DefaultServiceManager(sm);
97      }
98  
99      /***
100      * @see org.apache.avalon.framework.activity.Initializable#initialize()
101      */
102     public void initialize() throws Exception {
103         mailetContext = (MailetContext) serviceManager.lookup("org.apache.mailet.MailetContext");
104     }
105         
106     /***
107      * @see org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration)
108      */
109     public abstract void configure(Configuration arg0) throws ConfigurationException;
110 
111 }