-
-
Notifications
You must be signed in to change notification settings - Fork 3k
/
GMLBase.js
688 lines (642 loc) · 19.9 KB
/
GMLBase.js
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
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
/**
* @module ol/format/GMLBase
*/
// FIXME Envelopes should not be treated as geometries! readEnvelope_ is part
// of GEOMETRY_PARSERS_ and methods using GEOMETRY_PARSERS_ do not expect
// envelopes/extents, only geometries!
import Feature from '../Feature.js';
import Geometry from '../geom/Geometry.js';
import LineString from '../geom/LineString.js';
import LinearRing from '../geom/LinearRing.js';
import MultiLineString from '../geom/MultiLineString.js';
import MultiPoint from '../geom/MultiPoint.js';
import MultiPolygon from '../geom/MultiPolygon.js';
import Point from '../geom/Point.js';
import Polygon from '../geom/Polygon.js';
import XMLFeature from './XMLFeature.js';
import {extend} from '../array.js';
import {
getAllTextContent,
getAttributeNS,
makeArrayPusher,
makeReplacer,
parseNode,
pushParseAndPop,
} from '../xml.js';
import {get as getProjection} from '../proj.js';
import {
transformExtentWithOptions,
transformGeometryWithOptions,
} from './Feature.js';
/**
* @const
* @type {string}
*/
export const GMLNS = 'http://www.opengis.net/gml';
/**
* A regular expression that matches if a string only contains whitespace
* characters. It will e.g. match `''`, `' '`, `'\n'` etc.
*
* @const
* @type {RegExp}
*/
const ONLY_WHITESPACE_RE = /^\s*$/;
/**
* @typedef {Object} Options
* @property {Object<string, string>|string} [featureNS] Feature
* namespace. If not defined will be derived from GML. If multiple
* feature types have been configured which come from different feature
* namespaces, this will be an object with the keys being the prefixes used
* in the entries of featureType array. The values of the object will be the
* feature namespaces themselves. So for instance there might be a featureType
* item `topp:states` in the `featureType` array and then there will be a key
* `topp` in the featureNS object with value `http://www.openplans.org/topp`.
* @property {Array<string>|string} [featureType] Feature type(s) to parse.
* If multiple feature types need to be configured
* which come from different feature namespaces, `featureNS` will be an object
* with the keys being the prefixes used in the entries of featureType array.
* The values of the object will be the feature namespaces themselves.
* So for instance there might be a featureType item `topp:states` and then
* there will be a key named `topp` in the featureNS object with value
* `http://www.openplans.org/topp`.
* @property {string} [srsName] srsName to use when writing geometries.
* @property {boolean} [surface=false] Write gml:Surface instead of gml:Polygon
* elements. This also affects the elements in multi-part geometries.
* @property {boolean} [curve=false] Write gml:Curve instead of gml:LineString
* elements. This also affects the elements in multi-part geometries.
* @property {boolean} [multiCurve=true] Write gml:MultiCurve instead of gml:MultiLineString.
* Since the latter is deprecated in GML 3.
* @property {boolean} [multiSurface=true] Write gml:multiSurface instead of
* gml:MultiPolygon. Since the latter is deprecated in GML 3.
* @property {string} [schemaLocation] Optional schemaLocation to use when
* writing out the GML, this will override the default provided.
* @property {boolean} [hasZ=false] If coordinates have a Z value.
*/
/**
* @classdesc
* Abstract base class; normally only used for creating subclasses and not
* instantiated in apps.
* Feature base format for reading and writing data in the GML format.
* This class cannot be instantiated, it contains only base content that
* is shared with versioned format classes GML2 and GML3.
*
* @abstract
* @api
*/
class GMLBase extends XMLFeature {
/**
* @param {Options} [options] Optional configuration object.
*/
constructor(options) {
super();
options = options ? options : {};
/**
* @protected
* @type {Array<string>|string|undefined}
*/
this.featureType = options.featureType;
/**
* @protected
* @type {Object<string, string>|string|undefined}
*/
this.featureNS = options.featureNS;
/**
* @protected
* @type {string|undefined}
*/
this.srsName = options.srsName;
/**
* @protected
* @type {string}
*/
this.schemaLocation = '';
/**
* @type {Object<string, Object<string, Object>>}
*/
this.FEATURE_COLLECTION_PARSERS = {};
this.FEATURE_COLLECTION_PARSERS[this.namespace] = {
'featureMember': makeArrayPusher(this.readFeaturesInternal),
'featureMembers': makeReplacer(this.readFeaturesInternal),
};
this.supportedMediaTypes = ['application/gml+xml'];
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {Array<Feature> | undefined} Features.
*/
readFeaturesInternal(node, objectStack) {
const localName = node.localName;
let features = null;
if (localName == 'FeatureCollection') {
features = pushParseAndPop(
[],
this.FEATURE_COLLECTION_PARSERS,
node,
objectStack,
this,
);
} else if (
localName == 'featureMembers' ||
localName == 'featureMember' ||
localName == 'member'
) {
const context = objectStack[0];
let featureType = context['featureType'];
let featureNS = context['featureNS'];
const prefix = 'p';
const defaultPrefix = 'p0';
if (!featureType && node.childNodes) {
(featureType = []), (featureNS = {});
for (let i = 0, ii = node.childNodes.length; i < ii; ++i) {
const child = /** @type {Element} */ (node.childNodes[i]);
if (child.nodeType === 1) {
const ft = child.nodeName.split(':').pop();
if (!featureType.includes(ft)) {
let key = '';
let count = 0;
const uri = child.namespaceURI;
for (const candidate in featureNS) {
if (featureNS[candidate] === uri) {
key = candidate;
break;
}
++count;
}
if (!key) {
key = prefix + count;
featureNS[key] = uri;
}
featureType.push(key + ':' + ft);
}
}
}
if (localName != 'featureMember') {
// recheck featureType for each featureMember
context['featureType'] = featureType;
context['featureNS'] = featureNS;
}
}
if (typeof featureNS === 'string') {
const ns = featureNS;
featureNS = {};
featureNS[defaultPrefix] = ns;
}
/** @type {Object<string, Object<string, import("../xml.js").Parser>>} */
const parsersNS = {};
const featureTypes = Array.isArray(featureType)
? featureType
: [featureType];
for (const p in featureNS) {
/** @type {Object<string, import("../xml.js").Parser>} */
const parsers = {};
for (let i = 0, ii = featureTypes.length; i < ii; ++i) {
const featurePrefix = featureTypes[i].includes(':')
? featureTypes[i].split(':')[0]
: defaultPrefix;
if (featurePrefix === p) {
parsers[featureTypes[i].split(':').pop()] =
localName == 'featureMembers'
? makeArrayPusher(this.readFeatureElement, this)
: makeReplacer(this.readFeatureElement, this);
}
}
parsersNS[featureNS[p]] = parsers;
}
if (localName == 'featureMember' || localName == 'member') {
features = pushParseAndPop(undefined, parsersNS, node, objectStack);
} else {
features = pushParseAndPop([], parsersNS, node, objectStack);
}
}
if (features === null) {
features = [];
}
return features;
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {import("../geom/Geometry.js").default|import("../extent.js").Extent|undefined} Geometry.
*/
readGeometryOrExtent(node, objectStack) {
const context = /** @type {Object} */ (objectStack[0]);
context['srsName'] = node.firstElementChild.getAttribute('srsName');
context['srsDimension'] =
node.firstElementChild.getAttribute('srsDimension');
return pushParseAndPop(
null,
this.GEOMETRY_PARSERS,
node,
objectStack,
this,
);
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {import("../extent.js").Extent|undefined} Geometry.
*/
readExtentElement(node, objectStack) {
const context = /** @type {Object} */ (objectStack[0]);
const extent = /** @type {import("../extent.js").Extent} */ (
this.readGeometryOrExtent(node, objectStack)
);
return extent ? transformExtentWithOptions(extent, context) : undefined;
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {import("../geom/Geometry.js").default|undefined} Geometry.
*/
readGeometryElement(node, objectStack) {
const context = /** @type {Object} */ (objectStack[0]);
const geometry = /** @type {import("../geom/Geometry.js").default} */ (
this.readGeometryOrExtent(node, objectStack)
);
return geometry
? transformGeometryWithOptions(geometry, false, context)
: undefined;
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @param {boolean} asFeature whether result should be wrapped as a feature.
* @return {Feature|Object} Feature
*/
readFeatureElementInternal(node, objectStack, asFeature) {
let geometryName;
const values = {};
for (let n = node.firstElementChild; n; n = n.nextElementSibling) {
let value;
const localName = n.localName;
// first, check if it is simple attribute
if (
n.childNodes.length === 0 ||
(n.childNodes.length === 1 &&
(n.firstChild.nodeType === 3 || n.firstChild.nodeType === 4))
) {
value = getAllTextContent(n, false);
if (ONLY_WHITESPACE_RE.test(value)) {
value = undefined;
}
} else {
if (asFeature) {
//if feature, try it as a geometry or extent
value =
localName === 'boundedBy'
? this.readExtentElement(n, objectStack)
: this.readGeometryElement(n, objectStack);
}
if (!value) {
//if not a geometry or not a feature, treat it as a complex attribute
value = this.readFeatureElementInternal(n, objectStack, false);
} else if (localName !== 'boundedBy') {
// boundedBy is an extent and must not be considered as a geometry
geometryName = localName;
}
}
const len = n.attributes.length;
if (len > 0 && !(value instanceof Geometry)) {
value = {_content_: value};
for (let i = 0; i < len; i++) {
const attName = n.attributes[i].name;
value[attName] = n.attributes[i].value;
}
}
if (values[localName]) {
if (!(values[localName] instanceof Array)) {
values[localName] = [values[localName]];
}
values[localName].push(value);
} else {
values[localName] = value;
}
}
if (!asFeature) {
return values;
}
const feature = new Feature(values);
if (geometryName) {
feature.setGeometryName(geometryName);
}
const fid =
node.getAttribute('fid') || getAttributeNS(node, this.namespace, 'id');
if (fid) {
feature.setId(fid);
}
return feature;
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {Feature} Feature.
*/
readFeatureElement(node, objectStack) {
return this.readFeatureElementInternal(node, objectStack, true);
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {Point|undefined} Point.
*/
readPoint(node, objectStack) {
const flatCoordinates = this.readFlatCoordinatesFromNode(node, objectStack);
if (flatCoordinates) {
return new Point(flatCoordinates, 'XYZ');
}
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {MultiPoint|undefined} MultiPoint.
*/
readMultiPoint(node, objectStack) {
/** @type {Array<Array<number>>} */
const coordinates = pushParseAndPop(
[],
this.MULTIPOINT_PARSERS,
node,
objectStack,
this,
);
if (coordinates) {
return new MultiPoint(coordinates);
}
return undefined;
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {MultiLineString|undefined} MultiLineString.
*/
readMultiLineString(node, objectStack) {
/** @type {Array<LineString>} */
const lineStrings = pushParseAndPop(
[],
this.MULTILINESTRING_PARSERS,
node,
objectStack,
this,
);
if (lineStrings) {
return new MultiLineString(lineStrings);
}
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {MultiPolygon|undefined} MultiPolygon.
*/
readMultiPolygon(node, objectStack) {
/** @type {Array<Polygon>} */
const polygons = pushParseAndPop(
[],
this.MULTIPOLYGON_PARSERS,
node,
objectStack,
this,
);
if (polygons) {
return new MultiPolygon(polygons);
}
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
*/
pointMemberParser(node, objectStack) {
parseNode(this.POINTMEMBER_PARSERS, node, objectStack, this);
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
*/
lineStringMemberParser(node, objectStack) {
parseNode(this.LINESTRINGMEMBER_PARSERS, node, objectStack, this);
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
*/
polygonMemberParser(node, objectStack) {
parseNode(this.POLYGONMEMBER_PARSERS, node, objectStack, this);
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {LineString|undefined} LineString.
*/
readLineString(node, objectStack) {
const flatCoordinates = this.readFlatCoordinatesFromNode(node, objectStack);
if (flatCoordinates) {
const lineString = new LineString(flatCoordinates, 'XYZ');
return lineString;
}
return undefined;
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {Array<number>|undefined} LinearRing flat coordinates.
*/
readFlatLinearRing(node, objectStack) {
const ring = pushParseAndPop(
null,
this.GEOMETRY_FLAT_COORDINATES_PARSERS,
node,
objectStack,
this,
);
if (ring) {
return ring;
}
return undefined;
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {LinearRing|undefined} LinearRing.
*/
readLinearRing(node, objectStack) {
const flatCoordinates = this.readFlatCoordinatesFromNode(node, objectStack);
if (flatCoordinates) {
return new LinearRing(flatCoordinates, 'XYZ');
}
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {Polygon|undefined} Polygon.
*/
readPolygon(node, objectStack) {
/** @type {Array<Array<number>>} */
const flatLinearRings = pushParseAndPop(
[null],
this.FLAT_LINEAR_RINGS_PARSERS,
node,
objectStack,
this,
);
if (flatLinearRings && flatLinearRings[0]) {
const flatCoordinates = flatLinearRings[0];
const ends = [flatCoordinates.length];
let i, ii;
for (i = 1, ii = flatLinearRings.length; i < ii; ++i) {
extend(flatCoordinates, flatLinearRings[i]);
ends.push(flatCoordinates.length);
}
return new Polygon(flatCoordinates, 'XYZ', ends);
}
return undefined;
}
/**
* @param {Element} node Node.
* @param {Array<*>} objectStack Object stack.
* @return {Array<number>} Flat coordinates.
*/
readFlatCoordinatesFromNode(node, objectStack) {
return pushParseAndPop(
null,
this.GEOMETRY_FLAT_COORDINATES_PARSERS,
node,
objectStack,
this,
);
}
/**
* @param {Element} node Node.
* @param {import("./Feature.js").ReadOptions} [options] Options.
* @protected
* @return {import("../geom/Geometry.js").default} Geometry.
* @override
*/
readGeometryFromNode(node, options) {
const geometry = this.readGeometryElement(node, [
this.getReadOptions(node, options ? options : {}),
]);
return geometry ? geometry : null;
}
/**
* @param {Element} node Node.
* @param {import("./Feature.js").ReadOptions} [options] Options.
* @return {Array<import("../Feature.js").default>} Features.
* @override
*/
readFeaturesFromNode(node, options) {
const internalOptions = {
featureType: this.featureType,
featureNS: this.featureNS,
};
if (internalOptions) {
Object.assign(internalOptions, this.getReadOptions(node, options));
}
const features = this.readFeaturesInternal(node, [internalOptions]);
return features || [];
}
/**
* @param {Element} node Node.
* @return {import("../proj/Projection.js").default} Projection.
* @override
*/
readProjectionFromNode(node) {
return getProjection(
this.srsName
? this.srsName
: node.firstElementChild.getAttribute('srsName'),
);
}
}
GMLBase.prototype.namespace = GMLNS;
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.FLAT_LINEAR_RINGS_PARSERS = {
'http://www.opengis.net/gml': {},
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.GEOMETRY_FLAT_COORDINATES_PARSERS = {
'http://www.opengis.net/gml': {},
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.GEOMETRY_PARSERS = {
'http://www.opengis.net/gml': {},
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.MULTIPOINT_PARSERS = {
'http://www.opengis.net/gml': {
'pointMember': makeArrayPusher(GMLBase.prototype.pointMemberParser),
'pointMembers': makeArrayPusher(GMLBase.prototype.pointMemberParser),
},
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.MULTILINESTRING_PARSERS = {
'http://www.opengis.net/gml': {
'lineStringMember': makeArrayPusher(
GMLBase.prototype.lineStringMemberParser,
),
'lineStringMembers': makeArrayPusher(
GMLBase.prototype.lineStringMemberParser,
),
},
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.MULTIPOLYGON_PARSERS = {
'http://www.opengis.net/gml': {
'polygonMember': makeArrayPusher(GMLBase.prototype.polygonMemberParser),
'polygonMembers': makeArrayPusher(GMLBase.prototype.polygonMemberParser),
},
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.POINTMEMBER_PARSERS = {
'http://www.opengis.net/gml': {
'Point': makeArrayPusher(GMLBase.prototype.readFlatCoordinatesFromNode),
},
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.LINESTRINGMEMBER_PARSERS = {
'http://www.opengis.net/gml': {
'LineString': makeArrayPusher(GMLBase.prototype.readLineString),
},
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.POLYGONMEMBER_PARSERS = {
'http://www.opengis.net/gml': {
'Polygon': makeArrayPusher(GMLBase.prototype.readPolygon),
},
};
/**
* @const
* @type {Object<string, Object<string, import("../xml.js").Parser>>}
*/
GMLBase.prototype.RING_PARSERS = {
'http://www.opengis.net/gml': {
'LinearRing': makeReplacer(GMLBase.prototype.readFlatLinearRing),
},
};
export default GMLBase;