forked from json-iterator/java
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathCodegenImplObjectStrict.java
More file actions
374 lines (356 loc) · 16.4 KB
/
CodegenImplObjectStrict.java
File metadata and controls
374 lines (356 loc) · 16.4 KB
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
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
package com.jsoniter;
import com.jsoniter.spi.*;
import java.lang.reflect.Method;
import java.util.*;
import static com.jsoniter.CodegenImplObjectHash.appendVarDef;
import static com.jsoniter.CodegenImplObjectHash.appendWrappers;
class CodegenImplObjectStrict {
final static Map<String, String> DEFAULT_VALUES = new HashMap<String, String>() {{
put("float", "0.0f");
put("double", "0.0d");
put("boolean", "false");
put("byte", "0");
put("short", "0");
put("int", "0");
put("char", "0");
put("long", "0");
}};
public static String genObjectUsingStrict(ClassDescriptor desc) {
List<Binding> allBindings = desc.allDecoderBindings();
int lastRequiredIdx = assignMaskForRequiredProperties(allBindings);
boolean hasRequiredBinding = lastRequiredIdx > 0;
long expectedTracker = Long.MAX_VALUE >> (63 - lastRequiredIdx);
Map<Integer, Object> trieTree = buildTriTree(allBindings);
StringBuilder lines = new StringBuilder();
/*
* only strict mode binding support missing/extra properties tracking
* 1. if null, return null
* 2. if empty, return empty
* 3. bind first field
* 4. while (nextToken() == ',') { bind more fields }
* 5. handle missing/extra properties
* 6. create obj with args (if ctor binding)
* 7. assign fields to obj (if ctor binding)
* 8. apply multi param wrappers
*/
// === if null, return null
append(lines, "java.lang.Object existingObj = com.jsoniter.CodegenAccess.resetExistingObject(iter);");
append(lines, "if (iter.readNull()) { return null; }");
// === if input is empty obj, return empty obj
if (hasRequiredBinding) {
append(lines, "long tracker = 0;");
}
if (desc.ctor.parameters.isEmpty()) {
append(lines, "{{clazz}} obj = {{newInst}};");
append(lines, "if (!com.jsoniter.CodegenAccess.readObjectStart(iter)) {");
if (hasRequiredBinding) {
appendMissingRequiredProperties(lines, desc);
}
append(lines, "return obj;");
append(lines, "}");
// because obj can be created without binding
// so that fields and setters can be bind to obj directly without temp var
} else {
for (Binding parameter : desc.ctor.parameters) {
appendVarDef(lines, parameter);
}
append(lines, "if (!com.jsoniter.CodegenAccess.readObjectStart(iter)) {");
if (hasRequiredBinding) {
appendMissingRequiredProperties(lines, desc);
} else {
append(lines, "return {{newInst}};");
}
append(lines, "}");
for (Binding field : desc.fields) {
if (field.fromNames.length == 0) {
continue;
}
appendVarDef(lines, field);
}
for (Binding setter : desc.setters) {
appendVarDef(lines, setter);
}
}
for (WrapperDescriptor wrapper : desc.bindingTypeWrappers) {
for (Binding param : wrapper.parameters) {
appendVarDef(lines, param);
}
}
// === bind first field
if (desc.onExtraProperties != null || !desc.keyValueTypeWrappers.isEmpty()) {
append(lines, "java.util.Map extra = null;");
}
append(lines, "com.jsoniter.spi.Slice field = com.jsoniter.CodegenAccess.readObjectFieldAsSlice(iter);");
append(lines, "boolean once = true;");
append(lines, "while (once) {");
append(lines, "once = false;");
String rendered = renderTriTree(trieTree);
if (desc.ctor.parameters.isEmpty()) {
// if not field or setter, the value will set to temp variable
for (Binding field : desc.fields) {
if (field.fromNames.length == 0) {
continue;
}
rendered = updateBindingSetOp(rendered, field);
}
for (Binding setter : desc.setters) {
rendered = updateBindingSetOp(rendered, setter);
}
}
if (hasAnythingToBindFrom(allBindings)) {
append(lines, "switch (field.len()) {");
append(lines, rendered);
append(lines, "}"); // end of switch
}
appendOnUnknownField(lines, desc);
append(lines, "}"); // end of while
// === bind all fields
append(lines, "while (com.jsoniter.CodegenAccess.nextToken(iter) == ',') {");
append(lines, "field = com.jsoniter.CodegenAccess.readObjectFieldAsSlice(iter);");
if (hasAnythingToBindFrom(allBindings)) {
append(lines, "switch (field.len()) {");
append(lines, rendered);
append(lines, "}"); // end of switch
}
appendOnUnknownField(lines, desc);
append(lines, "}"); // end of while
if (hasRequiredBinding) {
append(lines, "if (tracker != " + expectedTracker + "L) {");
appendMissingRequiredProperties(lines, desc);
append(lines, "}");
}
if (desc.onExtraProperties != null) {
appendSetExtraProperteis(lines, desc);
}
if (!desc.keyValueTypeWrappers.isEmpty()) {
appendSetExtraToKeyValueTypeWrappers(lines, desc);
}
if (!desc.ctor.parameters.isEmpty()) {
append(lines, String.format("%s obj = {{newInst}};", CodegenImplNative.getTypeName(desc.clazz)));
for (Binding field : desc.fields) {
if (field.fromNames.length == 0) {
continue;
}
append(lines, String.format("obj.%s = _%s_;", field.field.getName(), field.name));
}
for (Binding setter : desc.setters) {
append(lines, String.format("obj.%s(_%s_);", setter.method.getName(), setter.name));
}
}
appendWrappers(desc.bindingTypeWrappers, lines);
append(lines, "return obj;");
return lines.toString()
.replace("{{clazz}}", desc.clazz.getCanonicalName())
.replace("{{newInst}}", CodegenImplObjectHash.genNewInstCode(desc.clazz, desc.ctor));
}
private static void appendSetExtraToKeyValueTypeWrappers(StringBuilder lines, ClassDescriptor desc) {
append(lines, "java.util.Iterator extraIter = extra.entrySet().iterator();");
append(lines, "while(extraIter.hasNext()) {");
for (Method wrapper : desc.keyValueTypeWrappers) {
append(lines, "java.util.Map.Entry entry = (java.util.Map.Entry)extraIter.next();");
append(lines, "String key = entry.getKey().toString();");
append(lines, "com.jsoniter.any.Any value = (com.jsoniter.any.Any)entry.getValue();");
append(lines, String.format("obj.%s(key, value.object());", wrapper.getName()));
}
append(lines, "}");
}
private static void appendSetExtraProperteis(StringBuilder lines, ClassDescriptor desc) {
Binding onExtraProperties = desc.onExtraProperties;
if (GenericsHelper.isSameClass(onExtraProperties.valueType, Map.class)) {
if (onExtraProperties.field != null) {
append(lines, String.format("obj.%s = extra;", onExtraProperties.field.getName()));
} else {
append(lines, String.format("obj.%s(extra);", onExtraProperties.method.getName()));
}
return;
}
throw new JsonException("extra properties can only be Map");
}
private static boolean hasAnythingToBindFrom(List<Binding> allBindings) {
for (Binding binding : allBindings) {
if (binding.fromNames.length > 0) {
return true;
}
}
return false;
}
private static int assignMaskForRequiredProperties(List<Binding> allBindings) {
int requiredIdx = 0;
for (Binding binding : allBindings) {
if (binding.asMissingWhenNotPresent) {
// one bit represent one field
binding.mask = 1L << requiredIdx;
requiredIdx++;
}
}
if (requiredIdx > 63) {
throw new JsonException("too many required properties to track");
}
return requiredIdx;
}
private static String updateBindingSetOp(String rendered, Binding binding) {
if (binding.fromNames.length == 0) {
return rendered;
}
while (true) {
String marker = "_" + binding.name + "_";
int start = rendered.indexOf(marker);
if (start == -1) {
return rendered;
}
int middle = rendered.indexOf('=', start);
if (middle == -1) {
throw new JsonException("can not find = in: " + rendered + " ,at " + start);
}
middle += 1;
int end = rendered.indexOf(';', start);
if (end == -1) {
throw new JsonException("can not find ; in: " + rendered + " ,at " + start);
}
String op = rendered.substring(middle, end);
if (binding.field != null) {
if (binding.valueCanReuse) {
// reuse; then field set
rendered = String.format("%scom.jsoniter.CodegenAccess.setExistingObject(iter, obj.%s);obj.%s=%s%s",
rendered.substring(0, start), binding.field.getName(), binding.field.getName(), op, rendered.substring(end));
} else {
// just field set
rendered = String.format("%sobj.%s=%s%s",
rendered.substring(0, start), binding.field.getName(), op, rendered.substring(end));
}
} else {
// method set
rendered = String.format("%sobj.%s(%s)%s",
rendered.substring(0, start), binding.method.getName(), op, rendered.substring(end));
}
}
}
private static void appendMissingRequiredProperties(StringBuilder lines, ClassDescriptor desc) {
append(lines, "java.util.List missingFields = new java.util.ArrayList();");
for (Binding binding : desc.allDecoderBindings()) {
if (binding.asMissingWhenNotPresent) {
long mask = binding.mask;
append(lines, String.format("com.jsoniter.CodegenAccess.addMissingField(missingFields, tracker, %sL, \"%s\");",
mask, binding.name));
}
}
if (desc.onMissingProperties == null || !desc.ctor.parameters.isEmpty()) {
append(lines, "throw new com.jsoniter.spi.JsonException(\"missing required properties: \" + missingFields);");
} else {
if (desc.onMissingProperties.field != null) {
append(lines, String.format("obj.%s = missingFields;", desc.onMissingProperties.field.getName()));
} else {
append(lines, String.format("obj.%s(missingFields);", desc.onMissingProperties.method.getName()));
}
}
}
private static void appendOnUnknownField(StringBuilder lines, ClassDescriptor desc) {
if (desc.asExtraForUnknownProperties && desc.onExtraProperties == null) {
append(lines, "throw new com.jsoniter.spi.JsonException('extra property: ' + field.toString());".replace('\'', '"'));
} else {
if (desc.asExtraForUnknownProperties || !desc.keyValueTypeWrappers.isEmpty()) {
append(lines, "if (extra == null) { extra = new java.util.HashMap(); }");
append(lines, "extra.put(field.toString(), iter.readAny());");
} else {
append(lines, "iter.skip();");
}
}
}
private static Map<Integer, Object> buildTriTree(List<Binding> allBindings) {
Map<Integer, Object> trieTree = new HashMap<Integer, Object>();
for (Binding field : allBindings) {
for (String fromName : field.fromNames) {
byte[] fromNameBytes = fromName.getBytes();
Map<Byte, Object> current = (Map<Byte, Object>) trieTree.get(fromNameBytes.length);
if (current == null) {
current = new HashMap<Byte, Object>();
trieTree.put(fromNameBytes.length, current);
}
for (int i = 0; i < fromNameBytes.length - 1; i++) {
byte b = fromNameBytes[i];
Map<Byte, Object> next = (Map<Byte, Object>) current.get(b);
if (next == null) {
next = new HashMap<Byte, Object>();
current.put(b, next);
}
current = next;
}
current.put(fromNameBytes[fromNameBytes.length - 1], field);
}
}
return trieTree;
}
private static String renderTriTree(Map<Integer, Object> trieTree) {
StringBuilder switchBody = new StringBuilder();
for (Map.Entry<Integer, Object> entry : trieTree.entrySet()) {
Integer len = entry.getKey();
append(switchBody, "case " + len + ": ");
Map<Byte, Object> current = (Map<Byte, Object>) entry.getValue();
addFieldDispatch(switchBody, len, 0, current, new ArrayList<Byte>());
append(switchBody, "break;");
}
return switchBody.toString();
}
private static void addFieldDispatch(
StringBuilder lines, int len, int i, Map<Byte, Object> current, List<Byte> bytesToCompare) {
for (Map.Entry<Byte, Object> entry : current.entrySet()) {
Byte b = entry.getKey();
if (i == len - 1) {
append(lines, "if (");
for (int j = 0; j < bytesToCompare.size(); j++) {
Byte a = bytesToCompare.get(j);
append(lines, String.format("field.at(%d)==%s && ", i - bytesToCompare.size() + j, a));
}
append(lines, String.format("field.at(%d)==%s", i, b));
append(lines, ") {");
Binding field = (Binding) entry.getValue();
if (field.asExtraWhenPresent) {
append(lines, String.format(
"throw new com.jsoniter.spi.JsonException('extra property: %s');".replace('\'', '"'),
field.name));
} else if (field.shouldSkip) {
append(lines, "iter.skip();");
append(lines, "continue;");
} else {
append(lines, String.format("_%s_ = %s;", field.name, CodegenImplNative.genField(field)));
if (field.asMissingWhenNotPresent) {
append(lines, "tracker = tracker | " + field.mask + "L;");
}
append(lines, "continue;");
}
append(lines, "}");
continue;
}
Map<Byte, Object> next = (Map<Byte, Object>) entry.getValue();
if (next.size() == 1) {
ArrayList<Byte> nextBytesToCompare = new ArrayList<Byte>(bytesToCompare);
nextBytesToCompare.add(b);
addFieldDispatch(lines, len, i + 1, next, nextBytesToCompare);
continue;
}
append(lines, "if (");
for (int j = 0; j < bytesToCompare.size(); j++) {
Byte a = bytesToCompare.get(j);
append(lines, String.format("field.at(%d)==%s && ", i - bytesToCompare.size() + j, a));
}
append(lines, String.format("field.at(%d)==%s", i, b));
append(lines, ") {");
addFieldDispatch(lines, len, i + 1, next, new ArrayList<Byte>());
append(lines, "}");
}
}
public static String genObjectUsingSkip(Class clazz, ConstructorDescriptor ctor) {
StringBuilder lines = new StringBuilder();
append(lines, "if (iter.readNull()) { return null; }");
append(lines, "{{clazz}} obj = {{newInst}};");
append(lines, "iter.skip();");
append(lines, "return obj;");
return lines.toString()
.replace("{{clazz}}", clazz.getCanonicalName())
.replace("{{newInst}}", CodegenImplObjectHash.genNewInstCode(clazz, ctor));
}
static void append(StringBuilder lines, String str) {
lines.append(str);
lines.append("\n");
}
}