|
1
55
56 package org.apache.bsf.util.event.generator;
57
58 import java.util.*;
59 import org.apache.bsf.debug.util.DebugLog;
60
61 public class AdapterClassLoader extends ClassLoader 
62 {
63 private static Hashtable classCache = new Hashtable();
64 private Class c;
65
66 public AdapterClassLoader()
67 {
68 super();
69 }
70 public synchronized Class defineClass(String name, byte[] b)
71 {
72 if ((c = getLoadedClass(name)) == null)
73 {
74 c = defineClass(name, b, 0, b.length);
75 put(name, c);
76 }
77 else
78 {
79 DebugLog.stderrPrintln("AdapterClassLoader: " + c +
80 " previously loaded. Can not redefine class.",
81 DebugLog.BSF_LOG_L2);
82 }
83
84 return c;
85 }
86 final protected Class findClass(String name)
87 {
88 return get(name);
89 }
90 final protected Class get(String name)
91 {
92 return (Class )classCache.get(name);
93 }
94 public synchronized Class getLoadedClass(String name)
95 {
96 Class c = findLoadedClass(name);
97
98 if (c == null)
99 {
100 try
101 {
102 c = findSystemClass(name);
103 }
104 catch (ClassNotFoundException e)
105 {
106 }
107 }
108
109 if (c == null)
110 {
111 c = findClass(name);
112 }
113
114 return c;
115 }
116 protected synchronized Class loadClass(String name, boolean resolve)
117 throws ClassNotFoundException
118 {
119 Class c = getLoadedClass(name);
120
121 if (c != null && resolve)
122 {
123 resolveClass(c);
124 }
125
126 return c;
127 }
128
134 final protected void put(String name, Class c)
135 {
136 classCache.put(name, c);
137 }
138 }
139 |
Popular Tags |
Java API By Example, From Geeks To Geeks.