forked from mozilla/rhino
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathNativeJSON.java
More file actions
505 lines (445 loc) · 16.8 KB
/
Copy pathNativeJSON.java
File metadata and controls
505 lines (445 loc) · 16.8 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
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
/* -*- Mode: java; tab-width: 4; indent-tabs-mode: 1; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Stack;
import org.mozilla.javascript.json.JsonParser;
/**
* This class implements the JSON native object.
* See ECMA 15.12.
* @author Matthew Crumley, Raphael Speyer
*/
public final class NativeJSON extends IdScriptableObject
{
private static final long serialVersionUID = -4567599697595654984L;
private static final Object JSON_TAG = "JSON";
private static final int MAX_STRINGIFY_GAP_LENGTH = 10;
static void init(Scriptable scope, boolean sealed)
{
NativeJSON obj = new NativeJSON();
obj.activatePrototypeMap(MAX_ID);
obj.setPrototype(getObjectPrototype(scope));
obj.setParentScope(scope);
if (sealed) { obj.sealObject(); }
ScriptableObject.defineProperty(scope, "JSON", obj,
ScriptableObject.DONTENUM);
}
private NativeJSON()
{
}
@Override
public String getClassName() { return "JSON"; }
@Override
protected void initPrototypeId(int id)
{
if (id <= LAST_METHOD_ID) {
String name;
int arity;
switch (id) {
case Id_toSource: arity = 0; name = "toSource"; break;
case Id_parse: arity = 2; name = "parse"; break;
case Id_stringify: arity = 3; name = "stringify"; break;
default: throw new IllegalStateException(String.valueOf(id));
}
initPrototypeMethod(JSON_TAG, id, name, arity);
} else {
throw new IllegalStateException(String.valueOf(id));
}
}
@Override
public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,
Scriptable thisObj, Object[] args)
{
if (!f.hasTag(JSON_TAG)) {
return super.execIdCall(f, cx, scope, thisObj, args);
}
int methodId = f.methodId();
switch (methodId) {
case Id_toSource:
return "JSON";
case Id_parse: {
String jtext = ScriptRuntime.toString(args, 0);
Object reviver = null;
if (args.length > 1) {
reviver = args[1];
}
if (reviver instanceof Callable) {
return parse(cx, scope, jtext, (Callable) reviver);
}
return parse(cx, scope, jtext);
}
case Id_stringify: {
Object value = null, replacer = null, space = null;
switch (args.length) {
case 3: space = args[2];
/* fall through */ case 2: replacer = args[1];
/* fall through */ case 1: value = args[0];
/* fall through */ case 0:
/* fall through */ default:
}
return stringify(cx, scope, value, replacer, space);
}
default: throw new IllegalStateException(String.valueOf(methodId));
}
}
private static Object parse(Context cx, Scriptable scope, String jtext) {
try {
return new JsonParser(cx, scope).parseValue(jtext);
} catch (JsonParser.ParseException ex) {
throw ScriptRuntime.constructError("SyntaxError", ex.getMessage());
}
}
public static Object parse(Context cx, Scriptable scope, String jtext,
Callable reviver)
{
Object unfiltered = parse(cx, scope, jtext);
Scriptable root = cx.newObject(scope);
root.put("", root, unfiltered);
return walk(cx, scope, reviver, root, "");
}
private static Object walk(Context cx, Scriptable scope, Callable reviver,
Scriptable holder, Object name)
{
final Object property;
if (name instanceof Number) {
property = holder.get( ((Number) name).intValue(), holder);
} else {
property = holder.get( ((String) name), holder);
}
if (property instanceof Scriptable) {
Scriptable val = ((Scriptable) property);
if (val instanceof NativeArray) {
long len = ((NativeArray) val).getLength();
for (long i = 0; i < len; i++) {
// indices greater than MAX_INT are represented as strings
if (i > Integer.MAX_VALUE) {
String id = Long.toString(i);
Object newElement = walk(cx, scope, reviver, val, id);
if (newElement == Undefined.instance) {
val.delete(id);
} else {
val.put(id, val, newElement);
}
} else {
int idx = (int) i;
Object newElement = walk(cx, scope, reviver, val, idx);
if (newElement == Undefined.instance) {
val.delete(idx);
} else {
val.put(idx, val, newElement);
}
}
}
} else {
Object[] keys = val.getIds();
for (Object p : keys) {
Object newElement = walk(cx, scope, reviver, val, p);
if (newElement == Undefined.instance) {
if (p instanceof Number)
val.delete(((Number) p).intValue());
else
val.delete((String) p);
} else {
if (p instanceof Number)
val.put(((Number) p).intValue(), val, newElement);
else
val.put((String) p, val, newElement);
}
}
}
}
return reviver.call(cx, scope, holder, new Object[] { name, property });
}
private static String repeat(char c, int count) {
char chars[] = new char[count];
Arrays.fill(chars, c);
return new String(chars);
}
private static class StringifyState {
StringifyState(Context cx, Scriptable scope, String indent, String gap,
Callable replacer, List<Object> propertyList,
Object space)
{
this.cx = cx;
this.scope = scope;
this.indent = indent;
this.gap = gap;
this.replacer = replacer;
this.propertyList = propertyList;
this.space = space;
}
Stack<Scriptable> stack = new Stack<Scriptable>();
String indent;
String gap;
Callable replacer;
List<Object> propertyList;
Object space;
Context cx;
Scriptable scope;
}
public static Object stringify(Context cx, Scriptable scope, Object value,
Object replacer, Object space)
{
String indent = "";
String gap = "";
List<Object> propertyList = null;
Callable replacerFunction = null;
if (replacer instanceof Callable) {
replacerFunction = (Callable) replacer;
} else if (replacer instanceof NativeArray) {
propertyList = new LinkedList<Object>();
NativeArray replacerArray = (NativeArray) replacer;
for (int i : replacerArray.getIndexIds()) {
Object v = replacerArray.get(i, replacerArray);
if (v instanceof String || v instanceof Number) {
propertyList.add(v);
} else if (v instanceof NativeString || v instanceof NativeNumber) {
propertyList.add(ScriptRuntime.toString(v));
}
}
}
if (space instanceof NativeNumber) {
space = ScriptRuntime.toNumber(space);
} else if (space instanceof NativeString) {
space = ScriptRuntime.toString(space);
}
if (space instanceof Number) {
int gapLength = (int) ScriptRuntime.toInteger(space);
gapLength = Math.min(MAX_STRINGIFY_GAP_LENGTH, gapLength);
gap = (gapLength > 0) ? repeat(' ', gapLength) : "";
space = gapLength;
} else if (space instanceof String) {
gap = (String) space;
if (gap.length() > MAX_STRINGIFY_GAP_LENGTH) {
gap = gap.substring(0, MAX_STRINGIFY_GAP_LENGTH);
}
}
StringifyState state = new StringifyState(cx, scope,
indent,
gap,
replacerFunction,
propertyList,
space);
ScriptableObject wrapper = new NativeObject();
wrapper.setParentScope(scope);
wrapper.setPrototype(ScriptableObject.getObjectPrototype(scope));
wrapper.defineProperty("", value, 0);
return str("", wrapper, state);
}
private static Object str(Object key, Scriptable holder,
StringifyState state)
{
Object value = null;
if (key instanceof String) {
value = getProperty(holder, (String) key);
} else {
value = getProperty(holder, ((Number) key).intValue());
}
if (value instanceof Scriptable && hasProperty((Scriptable) value, "toJSON")) {
Object toJSON = getProperty((Scriptable) value, "toJSON");
if (toJSON instanceof Callable) {
value = callMethod(state.cx, (Scriptable) value, "toJSON",
new Object[] { key });
}
}
if (state.replacer != null) {
value = state.replacer.call(state.cx, state.scope, holder,
new Object[] { key, value });
}
if (value instanceof NativeNumber) {
value = ScriptRuntime.toNumber(value);
} else if (value instanceof NativeString) {
value = ScriptRuntime.toString(value);
} else if (value instanceof NativeBoolean) {
value = ((NativeBoolean) value).getDefaultValue(ScriptRuntime.BooleanClass);
}
if (value == null) return "null";
if (value.equals(Boolean.TRUE)) return "true";
if (value.equals(Boolean.FALSE)) return "false";
if (value instanceof CharSequence) {
return quote(value.toString());
}
if (value instanceof Number) {
double d = ((Number) value).doubleValue();
if (!Double.isNaN(d) && d != Double.POSITIVE_INFINITY &&
d != Double.NEGATIVE_INFINITY)
{
return ScriptRuntime.toString(value);
}
return "null";
}
if (value instanceof Scriptable && !(value instanceof Callable)) {
if (value instanceof NativeArray) {
return ja((NativeArray) value, state);
}
return jo((Scriptable) value, state);
}
return Undefined.instance;
}
private static String join(Collection<Object> objs, String delimiter) {
if (objs == null || objs.isEmpty()) {
return "";
}
Iterator<Object> iter = objs.iterator();
if (!iter.hasNext()) return "";
StringBuilder builder = new StringBuilder(iter.next().toString());
while (iter.hasNext()) {
builder.append(delimiter).append(iter.next().toString());
}
return builder.toString();
}
private static String jo(Scriptable value, StringifyState state) {
if (state.stack.search(value) != -1) {
throw ScriptRuntime.typeError0("msg.cyclic.value");
}
state.stack.push(value);
String stepback = state.indent;
state.indent = state.indent + state.gap;
Object[] k = null;
if (state.propertyList != null) {
k = state.propertyList.toArray();
} else {
k = value.getIds();
}
List<Object> partial = new LinkedList<Object>();
for (Object p : k) {
Object strP = str(p, value, state);
if (strP != Undefined.instance) {
String member = quote(p.toString()) + ":";
if (state.gap.length() > 0) {
member = member + " ";
}
member = member + strP;
partial.add(member);
}
}
final String finalValue;
if (partial.isEmpty()) {
finalValue = "{}";
} else {
if (state.gap.length() == 0) {
finalValue = '{' + join(partial, ",") + '}';
} else {
String separator = ",\n" + state.indent;
String properties = join(partial, separator);
finalValue = "{\n" + state.indent + properties + '\n' +
stepback + '}';
}
}
state.stack.pop();
state.indent = stepback;
return finalValue;
}
private static String ja(NativeArray value, StringifyState state) {
if (state.stack.search(value) != -1) {
throw ScriptRuntime.typeError0("msg.cyclic.value");
}
state.stack.push(value);
String stepback = state.indent;
state.indent = state.indent + state.gap;
List<Object> partial = new LinkedList<Object>();
long len = value.getLength();
for (long index = 0; index < len; index++) {
Object strP;
if (index > Integer.MAX_VALUE) {
strP = str(Long.toString(index), value, state);
} else {
strP = str((int) index, value, state);
}
if (strP == Undefined.instance) {
partial.add("null");
} else {
partial.add(strP);
}
}
final String finalValue;
if (partial.isEmpty()) {
finalValue = "[]";
} else {
if (state.gap.length() == 0) {
finalValue = '[' + join(partial, ",") + ']';
} else {
String separator = ",\n" + state.indent;
String properties = join(partial, separator);
finalValue = "[\n" + state.indent + properties + '\n' + stepback + ']';
}
}
state.stack.pop();
state.indent = stepback;
return finalValue;
}
private static String quote(String string) {
StringBuilder product = new StringBuilder(string.length()+2); // two extra chars for " on either side
product.append('"');
int length = string.length();
for (int i = 0; i < length; i++) {
char c = string.charAt(i);
switch (c) {
case '"':
product.append("\\\"");
break;
case '\\':
product.append("\\\\");
break;
case '\b':
product.append("\\b");
break;
case '\f':
product.append("\\f");
break;
case '\n':
product.append("\\n");
break;
case '\r':
product.append("\\r");
break;
case '\t':
product.append("\\t");
break;
default:
if (c < ' ') {
product.append("\\u");
String hex = String.format("%04x", (int) c);
product.append(hex);
}
else {
product.append(c);
}
break;
}
}
product.append('"');
return product.toString();
}
// #string_id_map#
@Override
protected int findPrototypeId(String s)
{
int id;
// #generated# Last update: 2009-05-25 16:01:00 EDT
{ id = 0; String X = null;
L: switch (s.length()) {
case 5: X="parse";id=Id_parse; break L;
case 8: X="toSource";id=Id_toSource; break L;
case 9: X="stringify";id=Id_stringify; break L;
}
if (X!=null && X!=s && !X.equals(s)) id = 0;
}
// #/generated#
return id;
}
private static final int
Id_toSource = 1,
Id_parse = 2,
Id_stringify = 3,
LAST_METHOD_ID = 3,
MAX_ID = 3;
// #/string_id_map#
}