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32 package net.sf.retrotranslator.runtime.java.rmi.server;
33
34 import java.io.*;
35 import java.lang.reflect.*;
36 import java.rmi.*;
37 import java.rmi.server.*;
38 import java.security.*;
39 import net.sf.retrotranslator.runtime.asm.Type;
40 import net.sf.retrotranslator.runtime.impl.NullOutputStream;
41
42
45 public class RemoteObjectInvocationHandler_ extends RemoteObject implements InvocationHandler {
46
47 public RemoteObjectInvocationHandler_(RemoteRef ref) {
48 super(ref);
49 if (ref == null) {
50 throw new NullPointerException  ();
51 }
52 }
53
54 public Object invoke(Object proxy, Method method, Object [] args) throws Throwable {
55 if (method.getDeclaringClass() == Object .class) {
56 String name = method.getName();
57 if (name.equals("hashCode")) {
58 return hashCode();
59 }
60 if (name.equals("equals")) {
61 Object arg = args[0];
62 return arg == proxy ||
63 arg != null && Proxy.isProxyClass(arg.getClass()) && equals(Proxy.getInvocationHandler(arg));
64 }
65 if (name.equals("toString")) {
66 StringBuilder result = new StringBuilder ("Proxy[");
67 Class [] interfaces = proxy.getClass().getInterfaces();
68 if (interfaces.length > 0) {
69 boolean isFirst = interfaces.length == 1 || interfaces[0] != Remote.class;
70 result.append(getShortName(interfaces[isFirst ? 0 : 1])).append(',');
71 }
72 return result.append(this).append(']').toString();
73 }
74 }
75 if (proxy instanceof Remote) {
76 try {
77 return ref.invoke((Remote) proxy, method, args, getOperationNumber(method));
78 } catch (RuntimeException e) {
79 throw e;
80 } catch (Exception e) {
81 throw isExceptionDeclared(e.getClass(), proxy.getClass(), method)
82 ? e : new UnexpectedException(e.getMessage(), e);
83 }
84 } else {
85 throw new IllegalArgumentException ();
86 }
87 }
88
89 public String toString() {
90 return ref == null ? getShortName(getClass()) : getShortName(getClass()) + '[' + ref.remoteToString() + ']';
91 }
92
93 private static String getShortName(Class aClass) {
94 String name = aClass.getName();
95 return name.substring(name.lastIndexOf('.') + 1);
96 }
97
98 private static long getOperationNumber(Method method) {
99 try {
100 MessageDigest digest = MessageDigest.getInstance("SHA");
101 DataOutputStream stream = new DataOutputStream(new DigestOutputStream(NullOutputStream.INSTANCE, digest));
102 stream.writeUTF(method.getName() + Type.getMethodDescriptor(method));
103 byte[] bytes = digest.digest();
104 long result = 0;
105 for (int i = 7; i >= 0; i--) {
106 result = result << 8 | bytes[i] & 0xFF;
107 }
108 return result;
109 } catch (NoSuchAlgorithmException e) {
110 throw new SecurityException (e);
111 } catch (IOException e) {
112 throw new SecurityException (e);
113 }
114 }
115
116 private static boolean isExceptionDeclared(Class exceptionClass, Class proxyClass, Method method) {
117 try {
118 method = proxyClass.getMethod(method.getName(), method.getParameterTypes());
119 } catch (NoSuchMethodException ignore) {
120 }
122 for (Class declaredClass : method.getExceptionTypes()) {
123 if (declaredClass.isAssignableFrom(exceptionClass)) return true;
124 }
125 return false;
126 }
127
128 }
129 |
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