1 cananian 1.1.4.1 // HClassProxy.java, created Tue Jan 11 07:39:47 2000 by cananian
2 cananian 1.1.4.3 // Copyright (C) 2000 C. Scott Ananian <cananian@alumni.princeton.edu>
3 cananian 1.1.4.1 // Licensed under the terms of the GNU GPL; see COPYING for details.
4 cananian 1.1.4.1 package harpoon.ClassFile;
5 cananian 1.1.4.1
6 cananian 1.1.4.1 import harpoon.Util.ArrayFactory;
7 cananian 1.5 import net.cscott.jutil.ReferenceUnique;
8 cananian 1.5 import net.cscott.jutil.UniqueVector;
9 cananian 1.1.4.1 import harpoon.Util.Util;
10 cananian 1.1.4.1
11 cananian 1.1.4.1 import java.lang.reflect.Modifier;
12 cananian 1.1.4.4 import java.io.Serializable;
13 cananian 1.1.4.1 /**
14 cananian 1.1.4.1 * <code>HClassProxy</code> serves as a proxy class for
15 cananian 1.1.4.1 * <code>HClass</code> objects, allowing them to be swapped out &
16 cananian 1.1.4.1 * "redefined" after creation.
17 cananian 1.1.4.1 *
18 cananian 1.1.4.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu>
19 cananian 1.5 * @version $Id: HClassProxy.java,v 1.5 2004/02/08 01:58:03 cananian Exp $
20 cananian 1.1.4.1 */
21 cananian 1.1.4.4 class HClassProxy extends HClass implements HClassMutator, Serializable {
22 cananian 1.1.4.1 Relinker relinker;
23 cananian 1.1.4.1 HClass proxy;
24 cananian 1.1.4.1 HClassMutator proxyMutator;
25 cananian 1.1.4.1 // this boolean indicates whether the proxied class is from
26 cananian 1.1.4.1 // the same linker as this HClassProxy, which only happens
27 cananian 1.1.4.1 // when our linker create new HClassSyns
28 cananian 1.1.4.1 boolean sameLinker;
29 cananian 1.1.4.1
30 cananian 1.1.4.1 HClassProxy(Relinker l, HClass proxy) {
31 cananian 1.1.4.1 super(l);
32 cananian 1.1.4.1 this.relinker = l;
33 cananian 1.1.4.1 relink(proxy);
34 cananian 1.1.4.1 }
35 cananian 1.1.4.1 void relink(HClass newproxy) {
36 cananian 1.3.2.1 assert newproxy!=null;
37 cananian 1.3.2.1 assert !(newproxy instanceof HClassProxy &&
38 cananian 1.3.2.1 ((HClassProxy)newproxy).relinker==relinker) : "should never proxy to a proxy of this same relinker.";
39 cananian 1.1.4.1 // first update all the fields and methods hanging around.
40 cananian 1.1.4.1 if (proxy!=null) {
41 cananian 1.1.4.1 HField[] hf = proxy.getDeclaredFields();
42 cananian 1.1.4.1 for (int i=0; i<hf.length; i++)
43 cananian 1.1.4.1 try {
44 cananian 1.1.4.1 HFieldProxy hfp = (HFieldProxy) relinker.memberMap.get(hf[i]);
45 cananian 1.1.4.1 if (hfp==null) continue;
46 cananian 1.1.4.1 hfp.flushMemberMap(); hfp.relink(null);
47 cananian 1.1.4.1 HField nhf = newproxy.getDeclaredField(hf[i].getName());
48 cananian 1.1.4.1 if (!nhf.getDescriptor().equals(hf[i].getDescriptor())) continue;
49 cananian 1.1.4.1 hfp.relink(nhf); hfp.updateMemberMap();
50 cananian 1.1.4.1 } catch (NoSuchFieldError e) { /* skip */ }
51 cananian 1.1.4.1 HMethod[] hm = proxy.getDeclaredMethods();
52 cananian 1.1.4.1 for (int i=0; i<hm.length; i++)
53 cananian 1.1.4.1 try {
54 cananian 1.1.4.1 HMethodProxy hmp = (HMethodProxy) relinker.memberMap.get(hm[i]);
55 cananian 1.1.4.1 if (hmp==null) continue;
56 cananian 1.1.4.1 hmp.flushMemberMap(); hmp.relink(null);
57 cananian 1.1.4.1 HMethod nhm = newproxy.getDeclaredMethod(hm[i].getName(),
58 cananian 1.1.4.1 hm[i].getDescriptor());
59 cananian 1.1.4.1 hmp.relink(nhm); hmp.updateMemberMap();
60 cananian 1.1.4.1 } catch (NoSuchMethodError e) { /* skip */ }
61 cananian 1.1.4.1 }
62 cananian 1.1.4.1 // okay, now that the members are updated, let's update this guy.
63 cananian 1.1.4.1 this.proxy = newproxy;
64 cananian 1.1.4.1 this.proxyMutator = newproxy.getMutator();
65 cananian 1.1.4.1 this.sameLinker = (relinker == newproxy.getLinker());
66 cananian 1.1.4.1 }
67 cananian 1.1.4.1
68 cananian 1.1.4.1 /**
69 cananian 1.1.4.1 * Returns a mutator for this <code>HClass</code>, or <code>null</code>
70 cananian 1.1.4.1 * if this object is immutable.
71 cananian 1.1.4.1 */
72 cananian 1.1.4.1 public HClassMutator getMutator() {
73 cananian 1.1.4.1 if (proxyMutator==null) {
74 cananian 1.1.4.7 relink(isArray()
75 cananian 1.1.4.7 ? (HClass) new HClassArraySyn(relinker,
76 cananian 1.1.4.7 ((HClassArray)proxy).baseType,
77 cananian 1.1.4.7 ((HClassArray)proxy).dims)
78 cananian 1.1.4.7 : (HClass) new HClassSyn(relinker, proxy.getName(), this));
79 cananian 1.1.4.1 proxy.hasBeenModified = false; // exact copy of proxy.
80 cananian 1.1.4.1 }
81 cananian 1.1.4.1 return (proxyMutator==null) ? null : this;
82 cananian 1.1.4.1 }
83 cananian 1.1.4.1
84 cananian 1.1.4.1 // the following methods need no special handling:
85 cananian 1.1.4.1 public boolean hasBeenModified() { return proxy.hasBeenModified(); }
86 cananian 1.1.4.1 public String getName() { return proxy.getName(); }
87 cananian 1.1.4.1 public String getPackage() { return proxy.getPackage(); }
88 cananian 1.1.4.1 public String getDescriptor() { return proxy.getDescriptor(); }
89 cananian 1.1.4.1 public String getSourceFile() { return proxy.getSourceFile(); }
90 cananian 1.1.4.1 public int getModifiers() { return proxy.getModifiers(); }
91 cananian 1.1.4.1 public boolean isArray() { return proxy.isArray(); }
92 cananian 1.1.4.1 public boolean isInterface() { return proxy.isInterface(); }
93 cananian 1.1.4.1 public boolean isPrimitive() { return proxy.isPrimitive(); }
94 cananian 1.1.4.1
95 cananian 1.1.4.1 // the following methods require use to unwrap the parameters and
96 cananian 1.1.4.1 // wrap up the return values.
97 cananian 1.1.4.1 public HField getDeclaredField(String name) throws NoSuchFieldError {
98 cananian 1.1.4.1 return wrap(proxy.getDeclaredField(name));
99 cananian 1.1.4.1 }
100 cananian 1.1.4.1 public HField[] getDeclaredFields() {
101 cananian 1.1.4.1 return wrap(proxy.getDeclaredFields());
102 cananian 1.1.4.1 }
103 cananian 1.1.4.1 public HMethod getDeclaredMethod(String name, HClass parameterTypes[])
104 cananian 1.1.4.1 throws NoSuchMethodError {
105 cananian 1.1.4.1 return wrap(proxy.getDeclaredMethod(name, unwrap(parameterTypes)));
106 cananian 1.1.4.1 }
107 cananian 1.1.4.1 public HMethod getDeclaredMethod(String name, String descriptor)
108 cananian 1.1.4.1 throws NoSuchMethodError {
109 cananian 1.1.4.1 return wrap(proxy.getDeclaredMethod(name, descriptor));
110 cananian 1.1.4.1 }
111 cananian 1.1.4.1 public HMethod[] getDeclaredMethods() {
112 cananian 1.1.4.1 return wrap(proxy.getDeclaredMethods());
113 cananian 1.1.4.1 }
114 cananian 1.1.4.1 public HConstructor getConstructor(HClass parameterTypes[])
115 cananian 1.1.4.1 throws NoSuchMethodError {
116 cananian 1.1.4.1 return wrap(proxy.getConstructor(unwrap(parameterTypes)));
117 cananian 1.1.4.1 }
118 cananian 1.1.4.1 public HConstructor[] getConstructors() {
119 cananian 1.1.4.1 return wrap(proxy.getConstructors());
120 cananian 1.1.4.1 }
121 cananian 1.1.4.1 public HInitializer getClassInitializer() {
122 cananian 1.1.4.1 return wrap(proxy.getClassInitializer());
123 cananian 1.1.4.1 }
124 cananian 1.1.4.1 public HClass getSuperclass() {
125 cananian 1.1.4.1 return wrap(proxy.getSuperclass());
126 cananian 1.1.4.1 }
127 cananian 1.1.4.1 public HClass[] getInterfaces() {
128 cananian 1.1.4.1 return wrap(proxy.getInterfaces());
129 cananian 1.1.4.7 }
130 cananian 1.1.4.7 public HClass getComponentType() {
131 cananian 1.1.4.7 return wrap(proxy.getComponentType());
132 cananian 1.1.4.8 }
133 cananian 1.1.4.8 public boolean equals(Object o) {
134 cananian 1.1.4.8 return (o instanceof HClass &&
135 cananian 1.1.4.8 ((HClass)o).getDescriptor().equals(getDescriptor()));
136 cananian 1.1.4.1 }
137 cananian 1.1.4.1 // HClassMutator interface
138 cananian 1.1.4.1 public HField addDeclaredField(String name, HClass type)
139 cananian 1.1.4.1 throws DuplicateMemberException {
140 cananian 1.1.4.1 return wrap(proxyMutator.addDeclaredField(name, unwrap(type)));
141 cananian 1.1.4.1 }
142 cananian 1.1.4.1 public HField addDeclaredField(String name, String descriptor)
143 cananian 1.1.4.1 throws DuplicateMemberException {
144 cananian 1.1.4.1 return wrap(proxyMutator.addDeclaredField(name, descriptor));
145 cananian 1.1.4.1 }
146 cananian 1.1.4.1 public HField addDeclaredField(String name, HField template)
147 cananian 1.1.4.1 throws DuplicateMemberException {
148 cananian 1.1.4.1 return wrap(proxyMutator.addDeclaredField(name, template));
149 cananian 1.1.4.1 }
150 cananian 1.1.4.1 public void removeDeclaredField(HField f) throws NoSuchMemberException {
151 cananian 1.1.4.1 HFieldProxy fp = (HFieldProxy) f;
152 cananian 1.1.4.1 fp.flushMemberMap();
153 cananian 1.1.4.1 proxyMutator.removeDeclaredField(fp.proxy);
154 cananian 1.1.4.1 }
155 cananian 1.1.4.1 public HInitializer addClassInitializer() throws DuplicateMemberException {
156 cananian 1.1.4.1 return wrap(proxyMutator.addClassInitializer());
157 cananian 1.1.4.1 }
158 cananian 1.1.4.1 public void removeClassInitializer(HInitializer m)
159 cananian 1.1.4.1 throws NoSuchMemberException {
160 cananian 1.1.4.1 HInitializerProxy ip = (HInitializerProxy) m;
161 cananian 1.1.4.1 ip.flushMemberMap();
162 cananian 1.1.4.1 proxyMutator.removeClassInitializer((HInitializer)ip.proxy);
163 cananian 1.1.4.1 }
164 cananian 1.1.4.1 public HConstructor addConstructor(String descriptor)
165 cananian 1.1.4.1 throws DuplicateMemberException {
166 cananian 1.1.4.1 return wrap(proxyMutator.addConstructor(descriptor));
167 cananian 1.1.4.1 }
168 cananian 1.1.4.1 public HConstructor addConstructor(HClass[] paramTypes)
169 cananian 1.1.4.1 throws DuplicateMemberException {
170 cananian 1.1.4.1 return wrap(proxyMutator.addConstructor(unwrap(paramTypes)));
171 cananian 1.1.4.1 }
172 cananian 1.1.4.1 public HConstructor addConstructor(HConstructor template)
173 cananian 1.1.4.1 throws DuplicateMemberException {
174 cananian 1.1.4.1 return wrap(proxyMutator.addConstructor(template));
175 cananian 1.1.4.1 }
176 cananian 1.1.4.1 public void removeConstructor(HConstructor c) throws NoSuchMemberException {
177 cananian 1.1.4.1 HConstructorProxy cp = (HConstructorProxy) c;
178 cananian 1.1.4.1 cp.flushMemberMap();
179 cananian 1.1.4.1 proxyMutator.removeConstructor((HConstructor)cp.proxy);
180 cananian 1.1.4.1 }
181 cananian 1.1.4.1 public HMethod addDeclaredMethod(String name, String descriptor)
182 cananian 1.1.4.1 throws DuplicateMemberException {
183 cananian 1.1.4.1 return wrap(proxyMutator.addDeclaredMethod(name, descriptor));
184 cananian 1.1.4.1 }
185 cananian 1.1.4.1 public HMethod addDeclaredMethod(String name, HClass[] paramTypes,
186 cananian 1.1.4.1 HClass returnType)
187 cananian 1.1.4.1 throws DuplicateMemberException {
188 cananian 1.1.4.1 return wrap(proxyMutator.addDeclaredMethod(name, unwrap(paramTypes),
189 cananian 1.1.4.1 unwrap(returnType)));
190 cananian 1.1.4.1 }
191 cananian 1.1.4.1 public HMethod addDeclaredMethod(String name, HMethod template)
192 cananian 1.1.4.1 throws DuplicateMemberException {
193 cananian 1.1.4.1 return wrap(proxyMutator.addDeclaredMethod(name, template));
194 cananian 1.1.4.1 }
195 cananian 1.1.4.1 public void removeDeclaredMethod(HMethod m) throws NoSuchMemberException {
196 cananian 1.1.4.1 HMethodProxy mp = (HMethodProxy) m;
197 cananian 1.1.4.1 mp.flushMemberMap();
198 cananian 1.1.4.1 proxyMutator.removeDeclaredMethod(mp.proxy);
199 cananian 1.1.4.1 }
200 cananian 1.1.4.1 public void addInterface(HClass in) {
201 cananian 1.1.4.1 proxyMutator.addInterface(unwrap(in));
202 cananian 1.1.4.1 }
203 cananian 1.1.4.1 public void removeInterface(HClass in) throws NoSuchClassException {
204 cananian 1.1.4.1 proxyMutator.removeInterface(unwrap(in));
205 cananian 1.1.4.1 }
206 cananian 1.1.4.1 public void removeAllInterfaces() { proxyMutator.removeAllInterfaces(); }
207 cananian 1.1.4.1 public void addModifiers(int m) { proxyMutator.addModifiers(m); }
208 cananian 1.1.4.1 public void setModifiers(int m) { proxyMutator.setModifiers(m); }
209 cananian 1.1.4.1 public void removeModifiers(int m) { proxyMutator.removeModifiers(m); }
210 cananian 1.1.4.1 public void setSuperclass(HClass sc) {
211 cananian 1.1.4.1 proxyMutator.setSuperclass(unwrap(sc));
212 cananian 1.1.4.1 }
213 cananian 1.1.4.1 public void setSourceFile(String sourcefilename) {
214 cananian 1.1.4.1 proxyMutator.setSourceFile(sourcefilename);
215 cananian 1.1.4.4 }
216 cananian 1.1.4.4
217 cananian 1.1.4.4 // Serializable interface.
218 cananian 1.1.4.4 // we have to work around the fact that the base HClass is not Serializable.
219 cananian 1.1.4.4 public Object writeReplace() { return new HClassProxyStub(this); }
220 cananian 1.1.4.4 private static final class HClassProxyStub implements java.io.Serializable {
221 cananian 1.1.4.4 private Relinker relinker;
222 cananian 1.1.4.4 private HClass proxy;
223 cananian 1.1.4.4 HClassProxyStub(HClassProxy hcp) {
224 cananian 1.1.4.4 this.relinker = hcp.relinker;
225 cananian 1.1.4.4 this.proxy = hcp.proxy;
226 cananian 1.1.4.4 }
227 cananian 1.1.4.4 public Object readResolve() {
228 cananian 1.1.4.5 // leverage relinker during reconstruct. this makes sure all our
229 cananian 1.1.4.5 // mappings are consistent with the descCache.
230 cananian 1.1.4.6 return relinker.load(proxy.getDescriptor(), proxy);
231 cananian 1.1.4.4 }
232 cananian 1.1.4.1 }
233 cananian 1.1.4.1
234 cananian 1.1.4.1 // wrap/unwrap methods.
235 cananian 1.1.4.1 private HClass wrap(HClass hc) {
236 cananian 1.1.4.5 //if (sameLinker && hc != proxy) return hc; else return relinker.wrap(hc);
237 cananian 1.1.4.5 return relinker.wrap(hc); // it can never hurt to wrap the class.
238 cananian 1.1.4.1 }
239 cananian 1.1.4.1 private HClass unwrap(HClass hc) {
240 cananian 1.1.4.5 if (sameLinker) return hc; else return relinker.unwrap(hc);
241 cananian 1.1.4.1 }
242 cananian 1.1.4.1 private HField wrap(HField hf) { return relinker.wrap(hf); }
243 cananian 1.1.4.1 private HMethod wrap(HMethod hm) { return relinker.wrap(hm); }
244 cananian 1.1.4.1 private HConstructor wrap(HConstructor hc) { return relinker.wrap(hc); }
245 cananian 1.1.4.1 private HInitializer wrap(HInitializer hi) { return relinker.wrap(hi); }
246 cananian 1.1.4.1
247 cananian 1.1.4.1 // array wrap/unwrap
248 cananian 1.1.4.1 private HField[] wrap(HField hf[]) { return relinker.wrap(hf); }
249 cananian 1.1.4.1 private HMethod[] wrap(HMethod hm[]) { return relinker.wrap(hm); }
250 cananian 1.1.4.1 private HConstructor[] wrap(HConstructor hc[]) {return relinker.wrap(hc);}
251 cananian 1.1.4.1
252 cananian 1.1.4.1 private HClass[] wrap(HClass[] hc) {
253 cananian 1.1.4.1 HClass[] result = new HClass[hc.length];
254 cananian 1.1.4.1 for (int i=0; i<result.length; i++)
255 cananian 1.1.4.1 result[i] = wrap(hc[i]);
256 cananian 1.1.4.1 return result;
257 cananian 1.1.4.1 }
258 cananian 1.1.4.1 private HClass[] unwrap(HClass[] hc) {
259 cananian 1.1.4.1 HClass[] result = new HClass[hc.length];
260 cananian 1.1.4.1 for (int i=0; i<result.length; i++)
261 cananian 1.1.4.1 result[i] = unwrap(hc[i]);
262 cananian 1.1.4.1 return result;
263 cananian 1.1.4.1 }
264 cananian 1.1.4.1 }
265 cananian 1.1.4.1
266 cananian 1.1.4.1 // set emacs indentation style.
267 cananian 1.1.4.1 // Local Variables:
268 cananian 1.1.4.1 // c-basic-offset:2
269 cananian 1.2 // End: