JavaClass


1   /*
2    * Copyright 2001-2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy 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,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.apache.axis.utils.cache;
18  
19  import java.lang.reflect.Method  ;
20  import java.util.Hashtable  ;
21  import java.io.Serializable  ;
22  
23  /**
24   * A simple cache of previously loaded classes, and their methods.
25   *
26   * @author Sam Ruby <rubys@us.ibm.com>
27   */
28  public class JavaClass implements Serializable   {
29  
30      private static Hashtable   classes = new Hashtable  ();
31      private Hashtable   methods = new Hashtable  ();
32  
33      private Class   jc;
34  
35      /**
36       * Find (or create if necessary) a JavaClass associated with a given
37       * class
38       */
39      public static synchronized JavaClass find(Class   jc) {
40          JavaClass result = (JavaClass) classes.get(jc);
41  
42          if (result == null) {
43              result = new JavaClass(jc);
44              classes.put(jc, result);
45          }
46  
47          return result;
48      }
49  
50      /**
51       * Create a cache entry for this java.lang.Class
52       */
53      public JavaClass(Class   jc) {
54          this.jc = jc;
55          classes.put(jc, this);
56      }
57      
58      /**
59       * Return the java.lang.Class associated with this entry
60       */
61      public Class   getJavaClass() {
62          return jc;
63      }
64  
65      /**
66       * Lookup a method based on name.  This method returns an array just in
67       * case there is more than one.
68       * @param name name of method
69       */
70      public Method  [] getMethod(String   name) {
71          JavaMethod jm = (JavaMethod) methods.get(name);
72  
73          if (jm == null) {
74              methods.put(name, jm=new JavaMethod(jc, name));
75          }
76  
77          return jm.getMethod();
78      }
79  };
80
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