LoadingLoaderClassLoadHelper


1   /* 
2    * Copyright 2004-2005 OpenSymphony 
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License"); you may not 
5    * use this file except in compliance with the License. You may obtain a copy 
6    * of the License at 
7    * 
8    *   http://www.apache.org/licenses/LICENSE-2.0 
9    *   
10   * Unless required by applicable law or agreed to in writing, software 
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 
13   * License for the specific language governing permissions and limitations 
14   * under the License.
15   * 
16   */
17  
18  /*
19   * Previously Copyright (c) 2001-2004 James House
20   */
21  package org.quartz.simpl;
22  
23  import org.quartz.spi.ClassLoadHelper;
24  
25  import java.net.URL  ;
26  import java.io.InputStream  ;
27  
28  /**
29   * A <code>ClassLoadHelper</code> that uses either the loader of it's own
30   * class (<code>this.getClass().getClassLoader().loadClass( .. )</code>).
31   * 
32   * @see org.quartz.spi.ClassLoadHelper
33   * @see org.quartz.simpl.InitThreadContextClassLoadHelper
34   * @see org.quartz.simpl.SimpleClassLoadHelper
35   * @see org.quartz.simpl.CascadingClassLoadHelper
36   * 
37   * @author jhouse
38   */
39  public class LoadingLoaderClassLoadHelper implements ClassLoadHelper {
40  
41      /*
42       * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
43       * 
44       * Interface.
45       * 
46       * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
47       */
48  
49      /**
50       * Called to give the ClassLoadHelper a chance to initialize itself,
51       * including the oportunity to "steal" the class loader off of the calling
52       * thread, which is the thread that is initializing Quartz.
53       */
54      public void initialize() {
55      }
56  
57      /**
58       * Return the class with the given name.
59       */
60      public Class   loadClass(String   name) throws ClassNotFoundException   {
61          return getClassLoader().loadClass(name);
62      }
63  
64      /**
65       * Finds a resource with a given name. This method returns null if no
66       * resource with this name is found.
67       * @param name name of the desired resource
68       * @return a java.net.URL object
69       */
70      public URL   getResource(String   name) {
71          return getClassLoader().getResource(name);
72      }
73  
74      /**
75       * Finds a resource with a given name. This method returns null if no
76       * resource with this name is found.
77       * @param name name of the desired resource
78       * @return a java.io.InputStream object
79       */
80      public InputStream   getResourceAsStream(String   name) {
81          return getClassLoader().getResourceAsStream(name);
82      }
83  
84      private ClassLoader   getClassLoader() {
85          return this.getClass().getClassLoader();
86      }
87  }
88
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