1 cananian 1.1.2.1 // INClass.java, created Mon Dec 28 21:24:34 1998 by cananian
2 cananian 1.1.2.3 // Copyright (C) 1998 C. Scott Ananian <cananian@alumni.princeton.edu>
3 cananian 1.1.2.3 // Licensed under the terms of the GNU GPL; see COPYING for details.
4 cananian 1.1.2.1 package harpoon.Interpret.Quads;
5 cananian 1.1.2.1
6 cananian 1.1.2.2 import harpoon.ClassFile.HClass;
7 cananian 1.1.2.2 import harpoon.ClassFile.HMethod;
8 cananian 1.1.2.5 import harpoon.ClassFile.NoSuchClassException;
9 cananian 1.1.2.1
10 cananian 1.1.2.7 import harpoon.Util.Util;
11 cananian 1.1.2.7
12 cananian 1.1.2.1 import java.lang.reflect.Modifier;
13 cananian 1.1.2.1 import java.util.Hashtable;
14 cananian 1.1.2.1 /**
15 cananian 1.1.2.1 * <code>INClass</code> provides implementations of the native methods in
16 cananian 1.1.2.1 * <code>java.lang.Class</code>.
17 cananian 1.1.2.1 *
18 cananian 1.1.2.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu>
19 cananian 1.4 * @version $Id: INClass.java,v 1.4 2002/04/10 03:05:50 cananian Exp $
20 cananian 1.1.2.1 */
21 cananian 1.1.2.5 public class INClass {
22 cananian 1.1.2.1 static final void register(StaticState ss) {
23 cananian 1.1.2.7 try { // JDK 1.2 only
24 cananian 1.1.2.7 ss.register(forName0(ss));
25 cananian 1.1.2.7 } catch (NoSuchMethodError e) { // JDK 1.1 fallback.
26 cananian 1.1.2.7 ss.register(forName(ss));
27 cananian 1.1.2.7 }
28 cananian 1.1.2.5 ss.register(getComponentType(ss));
29 cananian 1.1.2.5 ss.register(getInterfaces(ss));
30 cananian 1.1.2.5 ss.register(getModifiers(ss));
31 cananian 1.1.2.5 ss.register(getName(ss));
32 cananian 1.1.2.5 ss.register(getPrimitiveClass(ss));
33 cananian 1.1.2.5 ss.register(getSuperclass(ss));
34 cananian 1.1.2.5 ss.register(isArray(ss));
35 cananian 1.1.2.5 ss.register(isInterface(ss));
36 cananian 1.1.2.5 ss.register(isPrimitive(ss));
37 cananian 1.1.2.7 try { // JDK 1.2 only
38 cananian 1.1.2.7 ss.register(newInstance0(ss));
39 cananian 1.1.2.7 } catch (NoSuchMethodError e) { // JDK 1.1 fallback.
40 cananian 1.1.2.7 ss.register(newInstance(ss));
41 cananian 1.1.2.7 }
42 cananian 1.1.2.1 // registry for name->class mapping
43 cananian 1.1.2.5 ss.putNativeClosure(ss.HCclass, new Hashtable());
44 cananian 1.1.2.4 // JDK 1.2 only
45 cananian 1.1.2.5 try { ss.register(registerNatives(ss)); } catch (NoSuchMethodError e){}
46 cananian 1.1.2.6 try { ss.register(getClassLoader0(ss)); } catch (NoSuchMethodError e){}
47 cananian 1.1.2.1 }
48 cananian 1.1.2.1 static final ObjectRef forClass(StaticState ss, HClass hc)
49 cananian 1.1.2.1 throws InterpretedThrowable {
50 cananian 1.1.2.5 Hashtable registry = (Hashtable) ss.getNativeClosure(ss.HCclass);
51 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) registry.get(hc);
52 cananian 1.1.2.1 if (obj!=null) return obj;
53 cananian 1.1.2.5 obj = new ObjectRef(ss, ss.HCclass);
54 cananian 1.1.2.5 Method.invoke(ss, ss.HCclass.getConstructor(new HClass[0]),
55 cananian 1.1.2.1 new Object[] { obj } );
56 cananian 1.1.2.1 obj.putClosure(hc);
57 cananian 1.1.2.1 registry.put(hc, obj);
58 cananian 1.1.2.1 return obj;
59 cananian 1.1.2.1 }
60 cananian 1.1.2.5 private static final NativeMethod forName(StaticState ss0) {
61 cananian 1.1.2.1 final HMethod hm =
62 cananian 1.1.2.5 ss0.HCclass.getMethod("forName", new HClass[] { ss0.HCstring });
63 cananian 1.1.2.1 return new NativeMethod() {
64 cananian 1.1.2.1 HMethod getMethod() { return hm; }
65 cananian 1.1.2.1 // throws ClassNotFoundException
66 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params)
67 cananian 1.1.2.1 throws InterpretedThrowable {
68 cananian 1.1.2.1 String clsname = ss.ref2str((ObjectRef)params[0]);
69 cananian 1.1.2.1 try {
70 cananian 1.1.2.5 return forClass(ss, ss.linker.forName(clsname));
71 cananian 1.1.2.5 } catch (NoSuchClassException e) {
72 cananian 1.1.2.5 ObjectRef obj = ss.makeThrowable(ss.HCclassnotfoundE);
73 cananian 1.1.2.1 throw new InterpretedThrowable(obj, ss);
74 cananian 1.1.2.1 }
75 cananian 1.1.2.1 }
76 cananian 1.1.2.1 };
77 cananian 1.1.2.1 }
78 cananian 1.1.2.7 // JDK 1.2 version of forName()
79 cananian 1.1.2.7 private static final NativeMethod forName0(StaticState ss0) {
80 cananian 1.1.2.7 final HMethod hm = ss0.HCclass.getMethod
81 cananian 1.1.2.7 ("forName0",
82 cananian 1.1.2.7 "(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;");
83 cananian 1.1.2.7 return new NativeMethod() {
84 cananian 1.1.2.7 HMethod getMethod() { return hm; }
85 cananian 1.1.2.7 // throws ClassNotFoundException
86 cananian 1.1.2.7 Object invoke(StaticState ss, Object[] params)
87 cananian 1.1.2.7 throws InterpretedThrowable {
88 cananian 1.1.2.7 String name = ss.ref2str((ObjectRef) params[0]);
89 cananian 1.1.2.7 boolean initialize = ((Boolean) params[1]).booleanValue();
90 cananian 1.1.2.7 ObjectRef loader = (ObjectRef) params[2];
91 cananian 1.3.2.1 assert loader==null : "Haven't implemented class loading "+
92 cananian 1.3.2.1 "from a ClassLoader object.";
93 cananian 1.3.2.1 assert initialize : "Haven't implemented uninitialized "+
94 cananian 1.3.2.1 "class loading.";
95 cananian 1.1.2.7 try {
96 cananian 1.1.2.7 return forClass(ss, ss.linker.forName(name));
97 cananian 1.1.2.7 } catch (NoSuchClassException e) {
98 cananian 1.1.2.7 ObjectRef obj = ss.makeThrowable(ss.HCclassnotfoundE);
99 cananian 1.1.2.7 throw new InterpretedThrowable(obj, ss);
100 cananian 1.1.2.7 }
101 cananian 1.1.2.7 }
102 cananian 1.1.2.7 };
103 cananian 1.1.2.7 }
104 cananian 1.1.2.5 private static final NativeMethod getPrimitiveClass(StaticState ss0) {
105 cananian 1.1.2.1 final HMethod hm =
106 cananian 1.1.2.5 ss0.HCclass.getMethod("getPrimitiveClass",
107 cananian 1.1.2.5 new HClass[] {ss0.HCstring});
108 cananian 1.1.2.1 return new NativeMethod() {
109 cananian 1.1.2.1 HMethod getMethod() { return hm; }
110 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params)
111 cananian 1.1.2.1 throws InterpretedThrowable {
112 cananian 1.1.2.1 String name = ss.ref2str((ObjectRef)params[0]);
113 cananian 1.1.2.1 if (name.equals("boolean")) return forClass(ss,HClass.Boolean);
114 cananian 1.1.2.1 if (name.equals("byte")) return forClass(ss,HClass.Byte);
115 cananian 1.1.2.1 if (name.equals("char")) return forClass(ss,HClass.Char);
116 cananian 1.1.2.1 if (name.equals("double")) return forClass(ss,HClass.Double);
117 cananian 1.1.2.1 if (name.equals("float")) return forClass(ss,HClass.Float);
118 cananian 1.1.2.1 if (name.equals("int")) return forClass(ss,HClass.Int);
119 cananian 1.1.2.1 if (name.equals("long")) return forClass(ss,HClass.Long);
120 cananian 1.1.2.1 if (name.equals("short")) return forClass(ss,HClass.Short);
121 cananian 1.1.2.1 if (name.equals("void")) return forClass(ss,HClass.Void);
122 cananian 1.1.2.1 // oops. throw exception.
123 cananian 1.1.2.5 ObjectRef obj = ss.makeThrowable(ss.HCclassnotfoundE);
124 cananian 1.1.2.1 throw new InterpretedThrowable(obj, ss);
125 cananian 1.1.2.1 }
126 cananian 1.1.2.1 };
127 cananian 1.1.2.1 }
128 cananian 1.1.2.5 private static final NativeMethod getName(StaticState ss0) {
129 cananian 1.1.2.5 final HMethod hm = ss0.HCclass.getMethod("getName", new HClass[0]);
130 cananian 1.1.2.1 return new NativeMethod() {
131 cananian 1.1.2.1 HMethod getMethod() { return hm; }
132 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params) {
133 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) params[0];
134 cananian 1.1.2.1 String name = ((HClass)obj.getClosure()).getName();
135 cananian 1.1.2.1 return ss.makeString(name);
136 cananian 1.1.2.1 }
137 cananian 1.1.2.1 };
138 cananian 1.1.2.1 }
139 cananian 1.1.2.5 private static final NativeMethod getSuperclass(StaticState ss0) {
140 cananian 1.1.2.5 final HMethod hm=ss0.HCclass.getMethod("getSuperclass", new HClass[0]);
141 cananian 1.1.2.1 return new NativeMethod() {
142 cananian 1.1.2.1 HMethod getMethod() { return hm; }
143 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params) {
144 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) params[0];
145 cananian 1.1.2.1 HClass hc = (HClass) obj.getClosure();
146 cananian 1.1.2.1 return forClass(ss, hc.getSuperclass());
147 cananian 1.1.2.1 }
148 cananian 1.1.2.1 };
149 cananian 1.1.2.1 }
150 cananian 1.1.2.5 private static final NativeMethod getInterfaces(StaticState ss0) {
151 cananian 1.1.2.5 final HMethod hm=ss0.HCclass.getMethod("getInterfaces", new HClass[0]);
152 cananian 1.1.2.1 return new NativeMethod() {
153 cananian 1.1.2.1 HMethod getMethod() { return hm; }
154 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params) {
155 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) params[0];
156 cananian 1.1.2.1 HClass hc = (HClass) obj.getClosure();
157 cananian 1.1.2.1 HClass in[] = hc.getInterfaces();
158 cananian 1.1.2.5 ArrayRef af=new ArrayRef(ss,ss.HCclassA, new int[]{in.length});
159 cananian 1.1.2.1 for (int i=0; i<in.length; i++)
160 cananian 1.1.2.1 af.update(i, forClass(ss, in[i]));
161 cananian 1.1.2.1 return af;
162 cananian 1.1.2.1 }
163 cananian 1.1.2.1 };
164 cananian 1.1.2.1 }
165 cananian 1.1.2.5 private static final NativeMethod getComponentType(StaticState ss0) {
166 cananian 1.1.2.5 final HMethod hm = ss0.HCclass.getMethod("getComponentType",
167 cananian 1.1.2.5 new HClass[0]);
168 cananian 1.1.2.1 return new NativeMethod() {
169 cananian 1.1.2.1 HMethod getMethod() { return hm; }
170 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params) {
171 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) params[0];
172 cananian 1.1.2.1 HClass hc = (HClass) obj.getClosure();
173 cananian 1.1.2.1 return forClass(ss, hc.getComponentType());
174 cananian 1.1.2.1 }
175 cananian 1.1.2.1 };
176 cananian 1.1.2.1 }
177 cananian 1.1.2.5 private static final NativeMethod getModifiers(StaticState ss0) {
178 cananian 1.1.2.5 final HMethod hm = ss0.HCclass.getMethod("getModifiers",new HClass[0]);
179 cananian 1.1.2.1 return new NativeMethod() {
180 cananian 1.1.2.1 HMethod getMethod() { return hm; }
181 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params) {
182 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) params[0];
183 cananian 1.1.2.1 HClass hc = (HClass) obj.getClosure();
184 cananian 1.1.2.1 return new Integer(hc.getModifiers());
185 cananian 1.1.2.1 }
186 cananian 1.1.2.1 };
187 cananian 1.1.2.1 }
188 cananian 1.1.2.5 private static final NativeMethod newInstance(StaticState ss0) {
189 cananian 1.1.2.5 final HMethod hm0 = ss0.HCclass.getMethod("newInstance",new HClass[0]);
190 cananian 1.1.2.1 return new NativeMethod() {
191 cananian 1.1.2.1 HMethod getMethod() { return hm0; }
192 cananian 1.1.2.1 private InterpretedThrowable inst(StaticState ss)
193 cananian 1.1.2.1 throws InterpretedThrowable {
194 cananian 1.1.2.5 ObjectRef obj = ss.makeThrowable(ss.HCinstantiationE);
195 cananian 1.1.2.1 return new InterpretedThrowable(obj, ss);
196 cananian 1.1.2.1 }
197 cananian 1.1.2.1 private InterpretedThrowable illacc(StaticState ss)
198 cananian 1.1.2.1 throws InterpretedThrowable {
199 cananian 1.1.2.5 ObjectRef obj = ss.makeThrowable(ss.HCillegalaccessE);
200 cananian 1.1.2.1 return new InterpretedThrowable(obj, ss);
201 cananian 1.1.2.1 }
202 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params) {
203 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) params[0];
204 cananian 1.1.2.1 try {
205 cananian 1.1.2.1 HClass hc = (HClass) obj.getClosure();
206 cananian 1.1.2.1 if (hc.isInterface() ||
207 cananian 1.1.2.1 Modifier.isAbstract(hc.getModifiers()))
208 cananian 1.1.2.1 throw inst(ss);
209 cananian 1.1.2.1 HMethod hm = hc.getConstructor(new HClass[0]);
210 cananian 1.1.2.8 int modf = hm.getModifiers();
211 cananian 1.1.2.8 if (Modifier.isPrivate(modf))
212 cananian 1.1.2.1 throw illacc(ss);
213 cananian 1.1.2.8 if (!Modifier.isPublic(modf)) {
214 cananian 1.1.2.8 // package or protected.
215 cananian 1.1.2.8 HClass context = ss.getCaller().getDeclaringClass();
216 cananian 1.1.2.8 if (context.getPackage().equals(hc.getPackage()) ||
217 cananian 1.1.2.8 (Modifier.isProtected(modf) &&
218 cananian 1.1.2.8 context.isInstanceOf(hc)))
219 cananian 1.1.2.8 /* this case is okay. */;
220 cananian 1.1.2.8 else throw illacc(ss);
221 cananian 1.1.2.8 }
222 cananian 1.1.2.1 obj = new ObjectRef(ss, hc);
223 cananian 1.1.2.1 Method.invoke(ss, hm, new Object[] { obj } );
224 cananian 1.1.2.1 return obj;
225 cananian 1.1.2.1 } catch (InterpretedThrowable e) {
226 cananian 1.1.2.1 throw inst(ss);
227 cananian 1.1.2.1 }
228 cananian 1.1.2.7 }
229 cananian 1.1.2.7 };
230 cananian 1.1.2.7 }
231 cananian 1.1.2.7 // JDK 1.2 stub.
232 cananian 1.1.2.7 private static final NativeMethod newInstance0(StaticState ss0) {
233 cananian 1.1.2.7 final HMethod hm = ss0.HCclass.getMethod("newInstance0",new HClass[0]);
234 cananian 1.1.2.7 return new NativeMethod() {
235 cananian 1.1.2.7 HMethod getMethod() { return hm; }
236 cananian 1.1.2.7 Object invoke(StaticState ss, Object[] params) {
237 cananian 1.1.2.7 return newInstance(ss).invoke(ss, params);
238 cananian 1.1.2.1 }
239 cananian 1.1.2.1 };
240 cananian 1.1.2.1 }
241 cananian 1.1.2.5 private static final NativeMethod isInterface(StaticState ss0) {
242 cananian 1.1.2.5 final HMethod hm = ss0.HCclass.getMethod("isInterface", new HClass[0]);
243 cananian 1.1.2.1 return new NativeMethod() {
244 cananian 1.1.2.1 HMethod getMethod() { return hm; }
245 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params) {
246 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) params[0];
247 cananian 1.1.2.1 HClass hc = (HClass) obj.getClosure();
248 cananian 1.1.2.1 return new Boolean(hc.isInterface());
249 cananian 1.1.2.1 }
250 cananian 1.1.2.1 };
251 cananian 1.1.2.1 }
252 cananian 1.1.2.5 private static final NativeMethod isArray(StaticState ss0) {
253 cananian 1.1.2.5 final HMethod hm = ss0.HCclass.getMethod("isArray", new HClass[0]);
254 cananian 1.1.2.1 return new NativeMethod() {
255 cananian 1.1.2.1 HMethod getMethod() { return hm; }
256 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params) {
257 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) params[0];
258 cananian 1.1.2.1 HClass hc = (HClass) obj.getClosure();
259 cananian 1.1.2.1 return new Boolean(hc.isArray());
260 cananian 1.1.2.1 }
261 cananian 1.1.2.1 };
262 cananian 1.1.2.1 }
263 cananian 1.1.2.5 private static final NativeMethod isPrimitive(StaticState ss0) {
264 cananian 1.1.2.5 final HMethod hm = ss0.HCclass.getMethod("isPrimitive", new HClass[0]);
265 cananian 1.1.2.1 return new NativeMethod() {
266 cananian 1.1.2.1 HMethod getMethod() { return hm; }
267 cananian 1.1.2.1 Object invoke(StaticState ss, Object[] params) {
268 cananian 1.1.2.1 ObjectRef obj = (ObjectRef) params[0];
269 cananian 1.1.2.1 HClass hc = (HClass) obj.getClosure();
270 cananian 1.1.2.1 return new Boolean(hc.isPrimitive());
271 cananian 1.1.2.1 }
272 cananian 1.1.2.1 };
273 cananian 1.1.2.4 }
274 cananian 1.1.2.4 // JDK 1.2 only: Class.registerNatives()
275 cananian 1.1.2.5 private static final NativeMethod registerNatives(StaticState ss0) {
276 cananian 1.1.2.4 final HMethod hm =
277 cananian 1.1.2.5 ss0.HCclass.getMethod("registerNatives",new HClass[0]);
278 cananian 1.1.2.6 return new NullNativeMethod(hm);
279 cananian 1.1.2.6 }
280 cananian 1.1.2.6 // JDK 1.2 only: Class.getClassLoader0()
281 cananian 1.1.2.6 private static final NativeMethod getClassLoader0(StaticState ss0) {
282 cananian 1.1.2.6 // always return 'null', indicating the boot class loader.
283 cananian 1.1.2.6 final HMethod hm =
284 cananian 1.1.2.6 ss0.HCclass.getMethod("getClassLoader0",new HClass[0]);
285 cananian 1.1.2.4 return new NullNativeMethod(hm);
286 cananian 1.1.2.1 }
287 cananian 1.2 }