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1
23
24 package org.objectweb.clif.util;
25
26 import org.objectweb.clif.util.bytearray.ByteArrayURLStreamHandler;
27 import java.net.URL  ;
28 import java.net.Socket ;
29 import java.io.IOException ;
30 import java.io.DataInputStream ;
31 import java.io.DataOutputStream ;
32 import java.util.Enumeration ;
33 import java.util.Vector ;
34 import java.util.Map ;
35 import java.util.HashMap ;
36
37
41 public class ClifClassLoader extends ClassLoader
42 {
43 static private ClifClassLoader cl = new ClifClassLoader();
44
45
46 static public ClifClassLoader getClassLoader()
47 {
48 return cl;
49 }
50
51
52 static public void clear()
53 {
54 cl.my_cache.clear();
55 cl = new ClifClassLoader();
56 }
57
58
59 Map my_cache = new HashMap ();
60 Socket sock = null;
61 DataInputStream dins;
62 DataOutputStream douts;
63
64
65 private ClifClassLoader()
66 {
67 super();
68 }
69
70
71 public synchronized byte[] getBytes(String name)
72 throws IOException
73 {
74 if (sock == null)
75 {
76 sock = new Socket (
77 System.getProperty("clif.codeserver.host"),
78 Integer.parseInt(System.getProperty("clif.codeserver.port")));
79 dins = new DataInputStream (sock.getInputStream());
80 douts = new DataOutputStream (sock.getOutputStream());
81 }
82 byte[] result = null;
83 result = (byte[])my_cache.get(name);
85 if (result == null && sock != null)
86 {
87 douts.writeUTF(name);
88 douts.flush();
89 int length = dins.readInt();
90 if (length >= 0)
91 {
92 result = new byte[length];
93 int offset = 0;
94 while (length > 0)
95 {
96 int n = dins.read(result, offset, length);
97 length -= n;
98 offset += n;
99 }
100 my_cache.put(name, result);
101 }
102 }
103 return result;
104 }
105
106
107 protected synchronized Class findClass(String name)
108 throws ClassNotFoundException
109 {
110 if (name.startsWith("org.objectweb.fractal.julia.generated."))
111 {
112 throw new ClassNotFoundException (name);
113 }
114 Class result = null;
115 String pathname = name.replace('.', '/') + ".class";
116 try
118 {
119 ClassLoader parent = getParent();
120 if (parent == null)
121 {
122 parent = getSystemClassLoader();
123 }
124 result = parent.loadClass(name);
125 }
126 catch (ClassNotFoundException e)
127 {
128 result = (Class )my_cache.get(name);
130 if (result == null)
131 {
132 byte[] code = null;
133 try
135 {
136 code = getBytes(pathname);
137 }
138 catch (IOException ex)
139 {
140 throw new ClassNotFoundException (name, ex);
141 }
142 if (code != null)
143 {
144 result = defineClass(name, code, 0, code.length);
145 my_cache.put(name, result);
146 }
147 else
148 {
149 throw new ClassNotFoundException (name);
150 }
151 }
152 }
153 return result;
154 }
155
156
157 public URL findResource(String name)
158 {
159 try
160 {
161 return new URL (null, "bytearray:" + name, new ByteArrayURLStreamHandler(this));
162 }
163 catch (Exception ex)
164 {
165 ex.printStackTrace();
166 return null;
167 }
168 }
169
170
171
176 public Enumeration findResources(String name)
177 {
178 Vector result = new Vector (1);
179 URL url = findResource(name);
180 if (url != null)
181 {
182 result.add(url);
183 }
184 return result.elements();
185 }
186 }
187 |
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