-
Notifications
You must be signed in to change notification settings - Fork 5
/
Root.java
278 lines (226 loc) · 8.51 KB
/
Root.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
package org.genericsystem.common;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Collectors;
import org.genericsystem.api.core.ApiStatics;
import org.genericsystem.api.core.ISignature;
import org.genericsystem.api.core.annotations.DirectClass;
import org.genericsystem.api.core.annotations.InstanceClass;
import org.genericsystem.defaults.DefaultConfig.MetaAttribute;
import org.genericsystem.defaults.DefaultConfig.MetaRelation;
import org.genericsystem.defaults.DefaultConfig.Sequence;
import org.genericsystem.defaults.DefaultConfig.SystemMap;
import org.genericsystem.defaults.DefaultGeneric;
import org.genericsystem.defaults.DefaultRoot;
import javassist.util.proxy.MethodFilter;
import javassist.util.proxy.MethodHandler;
import javassist.util.proxy.ProxyFactory;
import javassist.util.proxy.ProxyObject;
/**
* @author Nicolas Feybesse
*
*/
public abstract class Root implements DefaultRoot<Generic>, ProxyObject, Generic {
private final Map<Long, Generic> genericsById = new ConcurrentHashMap<>();
private final SystemCache systemCache = buildSystemCache(this);
protected boolean isInitialized = false;
private final ThreadLocal<AbstractCache> cacheLocal = new ThreadLocal<AbstractCache>();
protected abstract SystemCache buildSystemCache(Root root);
@Override
public Root getRoot() {
return this;
}
protected void startSystemCache(Class<?>... userClasses) {
checkNames(userClasses);
newCache().start();
systemCache.mount(Arrays.asList(MetaAttribute.class, MetaRelation.class, SystemMap.class, Sequence.class), userClasses);
getCurrentCache().flush();
// shiftContext();
}
private void checkNames(Class<?>[] userClasses) {
Set<String> set = new HashSet<String>();
List<String> names = Arrays.stream(userClasses).map(Class::getName).filter(className -> !set.add(className)).collect(Collectors.toList());
if (!names.isEmpty())
throw new IllegalStateException("Class name clash detected : " + names);
}
private MethodHandler handler;
@Override
public void setHandler(MethodHandler handler) {
this.handler = handler;
}
@Override
public MethodHandler getHandler() {
return handler;
}
@Override
public abstract AbstractCache newCache();
@SuppressWarnings("unchecked")
@Override
public <Custom extends Generic> Custom find(Class<?> clazz) {
return (Custom) systemCache.find(clazz);
}
@SuppressWarnings("unchecked")
@Override
public <Custom extends Generic> Custom bind(Class<?> clazz) {
return (Custom) systemCache.bind(clazz);
}
@Override
public Class<?> findAnnotedClass(Generic generic) {
return systemCache.getClassByVertex(generic);
}
public Generic getGenericById(long ts) {
return genericsById.get(ts);
}
protected void release(long ts) {
genericsById.remove(ts);
}
protected final Generic newT(Class<?> clazz) {
try {
return newInstance(clazz);
} catch (IllegalArgumentException e) {
getCurrentCache().discardWithException(e);
}
return null; // Not reached
}
@Override
public final Generic[] newTArray(int dim) {
return new Generic[dim];
}
protected Generic build(Vertex vertex) {
return build(vertex.getTs(), vertex.getClazz(), vertex.getMeta() == vertex.getTs() ? null : getGenericById(vertex.getMeta()), vertex.getSupers().stream().map(this::getGenericById).collect(Collectors.toList()), vertex.getValue(),
vertex.getComponents().stream().map(this::getGenericById).collect(Collectors.toList()), vertex.getBirthTs());
}
protected Class<?> adaptClass(Class<?> clazz, Generic meta) {
InstanceClass metaAnnotation = meta == null ? null : getAnnotedClass(meta).getAnnotation(InstanceClass.class);
if (clazz == null)
return metaAnnotation == null ? getTClass() : metaAnnotation.value();
DirectClass directClass = clazz.getAnnotation(DirectClass.class);
if (directClass != null){
if (metaAnnotation == null||metaAnnotation.value().isAssignableFrom(clazz))
return clazz;
else
getCurrentCache().discardWithException(new IllegalStateException(clazz + " must extend " + metaAnnotation.value()));}
if (metaAnnotation == null)
return getTClass().isAssignableFrom(clazz) ? clazz : getTClass();
if (metaAnnotation.value().isAssignableFrom(clazz))
return clazz;
else
getCurrentCache().discardWithException(new IllegalStateException(clazz + " must extend " + metaAnnotation.value()));
return null;// Not reached
}
public abstract long pickNewTs();
Generic build(Long ts, Class<?> clazz, Generic meta, List<Generic> supers, Serializable value, List<Generic> components) {
return build(ts, clazz, meta, supers, value, components, isInitialized() ? Long.MAX_VALUE : ApiStatics.TS_SYSTEM);
}
protected abstract Generic build(Long ts, Class<?> clazz, Generic meta, List<Generic> supers, Serializable value, List<Generic> components, long birhTs);
protected Generic init(Generic generic, DefaultHandler handler) {
((ProxyObject) generic).setHandler(handler);
assert ((ProxyObject) generic).getHandler() instanceof Root.DefaultHandler;
Generic gresult = genericsById.putIfAbsent(handler.getTs(), generic);
assert gresult == null : gresult.info();
return generic;
}
protected abstract Class<Generic> getTClass();
private final static ProxyFactory PROXY_FACTORY = new ProxyFactory();
private final static MethodFilter METHOD_FILTER = method -> method.getName().equals("toString");
private Generic newInstance(Class<?> clazz) {
PROXY_FACTORY.setSuperclass(clazz.isInterface() ? Object.class : clazz);
PROXY_FACTORY.setInterfaces(clazz.isInterface() ? (getTClass().isAssignableFrom(clazz) ? new Class[] { clazz } : new Class[] { clazz, getTClass() }) : getTClass().isAssignableFrom(clazz) ? new Class[] {} : new Class[] { getTClass() });
try {
return (Generic) PROXY_FACTORY.createClass(METHOD_FILTER).newInstance();
} catch (InstantiationException | IllegalAccessException e) {
throw new IllegalStateException(e);
}
}
public Class<?> getAnnotedClass(Generic generic) {
if (generic.isSystem()) {
Class<?> annotedClass = findAnnotedClass(generic);
if (annotedClass != null)
return annotedClass;
}
if (!generic.isRoot() && generic instanceof ProxyObject)
return generic.getClass().getSuperclass();
return generic.getClass();
}
public boolean isInitialized() {
return isInitialized;
}
public abstract class DefaultHandler implements MethodHandler, ISignature<Generic> {
private final Class<?> clazz;
private final Generic meta;
private final List<Generic> supers;
private final Serializable value;
private final List<Generic> components;
private final long ts;
protected DefaultHandler(Class<?> clazz, Generic meta, List<Generic> supers, Serializable value, List<Generic> components, long ts) {
this.clazz = clazz;
this.meta = meta;
this.supers = supers;
this.value = value;
this.components = components;
this.ts = ts;
}
@Override
public Object invoke(Object self, Method m, Method proceed, Object[] args) throws Throwable {
return ((DefaultGeneric<?>) self).defaultToString();
}
abstract protected Root getRoot();
public Vertex getVertex() {
return new Vertex(getClazz(), getTs(), getMeta() != null ? getMeta().getTs() : getTs(), getSupers().stream().map(Generic::getTs).collect(Collectors.toList()), getValue(),
getComponents().stream().map(Generic::getTs).collect(Collectors.toList()), getBirthTs());
}
public Class<?> getClazz() {
return clazz;
}
@Override
public Generic getMeta() {
return meta;
}
@Override
public List<Generic> getSupers() {
return supers;
}
@Override
public Serializable getValue() {
return value;
}
@Override
public List<Generic> getComponents() {
return components;
}
@Override
public long getTs() {
return ts;
}
};
@Override
public AbstractCache getCurrentCache() {
AbstractCache context = cacheLocal.get();
if (context == null)
throw new IllegalStateException("Unable to find the current cache, thread context is not defined. Did you miss to call start() method on your cache ? or perhaps have you accidentaly closed your engine ?");
return context;
}
protected AbstractCache start(AbstractCache cache) {
if (cache == null)
throw new NullPointerException();
cacheLocal.set(cache);
return cache;
}
protected void stop(AbstractCache cache) {
cacheLocal.remove();
}
@Override
public void close() {
cacheLocal.remove();
}
@Override
public String toString() {
return defaultToString();
}
}