ClassLoadHelper


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.spi;
22  
23  import java.net.URL  ;
24  import java.io.InputStream  ;
25  
26  /**
27   * An interface for classes wishing to provide the service of loading classes
28   * and resources within the scheduler...
29   * 
30   * @author jhouse
31   */
32  public interface ClassLoadHelper {
33  
34      /*
35       * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
36       * 
37       * Interface.
38       * 
39       * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
40       */
41  
42      /**
43       * Called to give the ClassLoadHelper a chance to initialize itself,
44       * including the oportunity to "steal" the class loader off of the calling
45       * thread, which is the thread that is initializing Quartz.
46       */
47      void initialize();
48  
49      /**
50       * Return the class with the given name.
51       */
52      Class   loadClass(String   name) throws ClassNotFoundException  ;
53  
54      /**
55       * Finds a resource with a given name. This method returns null if no
56       * resource with this name is found.
57       * @param name name of the desired resource
58       * @return a java.net.URL object
59       */
60      URL   getResource(String   name);
61  
62      /**
63       * Finds a resource with a given name. This method returns null if no
64       * resource with this name is found.
65       * @param name name of the desired resource
66       * @return a java.io.InputStream object
67       */
68      InputStream   getResourceAsStream(String   name);
69  }
70
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