openlayers
Version:
Build tools and sources for developing OpenLayers based mapping applications
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JavaScript
goog.provide('ol.format.GML2');
goog.require('ol');
goog.require('ol.extent');
goog.require('ol.format.GMLBase');
goog.require('ol.format.XSD');
goog.require('ol.proj');
goog.require('ol.xml');
/**
* @classdesc
* Feature format for reading and writing data in the GML format,
* version 2.1.2.
*
* @constructor
* @param {olx.format.GMLOptions=} opt_options Optional configuration object.
* @extends {ol.format.GMLBase}
* @api
*/
ol.format.GML2 = function(opt_options) {
var options = /** @type {olx.format.GMLOptions} */
(opt_options ? opt_options : {});
ol.format.GMLBase.call(this, options);
this.FEATURE_COLLECTION_PARSERS[ol.format.GMLBase.GMLNS][
'featureMember'] =
ol.xml.makeArrayPusher(ol.format.GMLBase.prototype.readFeaturesInternal);
/**
* @inheritDoc
*/
this.schemaLocation = options.schemaLocation ?
options.schemaLocation : ol.format.GML2.schemaLocation_;
};
ol.inherits(ol.format.GML2, ol.format.GMLBase);
/**
* @const
* @type {string}
* @private
*/
ol.format.GML2.schemaLocation_ = ol.format.GMLBase.GMLNS +
' http://schemas.opengis.net/gml/2.1.2/feature.xsd';
/**
* @param {Node} node Node.
* @param {Array.<*>} objectStack Object stack.
* @private
* @return {Array.<number>|undefined} Flat coordinates.
*/
ol.format.GML2.prototype.readFlatCoordinates_ = function(node, objectStack) {
var s = ol.xml.getAllTextContent(node, false).replace(/^\s*|\s*$/g, '');
var context = /** @type {ol.XmlNodeStackItem} */ (objectStack[0]);
var containerSrs = context['srsName'];
var containerDimension = node.parentNode.getAttribute('srsDimension');
var axisOrientation = 'enu';
if (containerSrs) {
var proj = ol.proj.get(containerSrs);
if (proj) {
axisOrientation = proj.getAxisOrientation();
}
}
var coords = s.split(/[\s,]+/);
// The "dimension" attribute is from the GML 3.0.1 spec.
var dim = 2;
if (node.getAttribute('srsDimension')) {
dim = ol.format.XSD.readNonNegativeIntegerString(
node.getAttribute('srsDimension'));
} else if (node.getAttribute('dimension')) {
dim = ol.format.XSD.readNonNegativeIntegerString(
node.getAttribute('dimension'));
} else if (containerDimension) {
dim = ol.format.XSD.readNonNegativeIntegerString(containerDimension);
}
var x, y, z;
var flatCoordinates = [];
for (var i = 0, ii = coords.length; i < ii; i += dim) {
x = parseFloat(coords[i]);
y = parseFloat(coords[i + 1]);
z = (dim === 3) ? parseFloat(coords[i + 2]) : 0;
if (axisOrientation.substr(0, 2) === 'en') {
flatCoordinates.push(x, y, z);
} else {
flatCoordinates.push(y, x, z);
}
}
return flatCoordinates;
};
/**
* @param {Node} node Node.
* @param {Array.<*>} objectStack Object stack.
* @private
* @return {ol.Extent|undefined} Envelope.
*/
ol.format.GML2.prototype.readBox_ = function(node, objectStack) {
ol.DEBUG && console.assert(node.nodeType == Node.ELEMENT_NODE,
'node.nodeType should be ELEMENT');
ol.DEBUG && console.assert(node.localName == 'Box', 'localName should be Box');
/** @type {Array.<number>} */
var flatCoordinates = ol.xml.pushParseAndPop([null],
this.BOX_PARSERS_, node, objectStack, this);
return ol.extent.createOrUpdate(flatCoordinates[1][0],
flatCoordinates[1][1], flatCoordinates[1][3],
flatCoordinates[1][4]);
};
/**
* @param {Node} node Node.
* @param {Array.<*>} objectStack Object stack.
* @private
*/
ol.format.GML2.prototype.innerBoundaryIsParser_ = function(node, objectStack) {
ol.DEBUG && console.assert(node.nodeType == Node.ELEMENT_NODE,
'node.nodeType should be ELEMENT');
ol.DEBUG && console.assert(node.localName == 'innerBoundaryIs',
'localName should be innerBoundaryIs');
/** @type {Array.<number>|undefined} */
var flatLinearRing = ol.xml.pushParseAndPop(undefined,
this.RING_PARSERS, node, objectStack, this);
if (flatLinearRing) {
var flatLinearRings = /** @type {Array.<Array.<number>>} */
(objectStack[objectStack.length - 1]);
ol.DEBUG && console.assert(Array.isArray(flatLinearRings),
'flatLinearRings should be an array');
ol.DEBUG && console.assert(flatLinearRings.length > 0,
'flatLinearRings should have an array length larger than 0');
flatLinearRings.push(flatLinearRing);
}
};
/**
* @param {Node} node Node.
* @param {Array.<*>} objectStack Object stack.
* @private
*/
ol.format.GML2.prototype.outerBoundaryIsParser_ = function(node, objectStack) {
ol.DEBUG && console.assert(node.nodeType == Node.ELEMENT_NODE,
'node.nodeType should be ELEMENT');
ol.DEBUG && console.assert(node.localName == 'outerBoundaryIs',
'localName should be outerBoundaryIs');
/** @type {Array.<number>|undefined} */
var flatLinearRing = ol.xml.pushParseAndPop(undefined,
this.RING_PARSERS, node, objectStack, this);
if (flatLinearRing) {
var flatLinearRings = /** @type {Array.<Array.<number>>} */
(objectStack[objectStack.length - 1]);
ol.DEBUG && console.assert(Array.isArray(flatLinearRings),
'flatLinearRings should be an array');
ol.DEBUG && console.assert(flatLinearRings.length > 0,
'flatLinearRings should have an array length larger than 0');
flatLinearRings[0] = flatLinearRing;
}
};
/**
* @const
* @type {Object.<string, Object.<string, ol.XmlParser>>}
* @private
*/
ol.format.GML2.prototype.GEOMETRY_FLAT_COORDINATES_PARSERS_ = {
'http://www.opengis.net/gml' : {
'coordinates': ol.xml.makeReplacer(
ol.format.GML2.prototype.readFlatCoordinates_)
}
};
/**
* @const
* @type {Object.<string, Object.<string, ol.XmlParser>>}
* @private
*/
ol.format.GML2.prototype.FLAT_LINEAR_RINGS_PARSERS_ = {
'http://www.opengis.net/gml' : {
'innerBoundaryIs': ol.format.GML2.prototype.innerBoundaryIsParser_,
'outerBoundaryIs': ol.format.GML2.prototype.outerBoundaryIsParser_
}
};
/**
* @const
* @type {Object.<string, Object.<string, ol.XmlParser>>}
* @private
*/
ol.format.GML2.prototype.BOX_PARSERS_ = {
'http://www.opengis.net/gml' : {
'coordinates': ol.xml.makeArrayPusher(
ol.format.GML2.prototype.readFlatCoordinates_)
}
};
/**
* @const
* @type {Object.<string, Object.<string, ol.XmlParser>>}
* @private
*/
ol.format.GML2.prototype.GEOMETRY_PARSERS_ = {
'http://www.opengis.net/gml' : {
'Point': ol.xml.makeReplacer(ol.format.GMLBase.prototype.readPoint),
'MultiPoint': ol.xml.makeReplacer(
ol.format.GMLBase.prototype.readMultiPoint),
'LineString': ol.xml.makeReplacer(
ol.format.GMLBase.prototype.readLineString),
'MultiLineString': ol.xml.makeReplacer(
ol.format.GMLBase.prototype.readMultiLineString),
'LinearRing' : ol.xml.makeReplacer(
ol.format.GMLBase.prototype.readLinearRing),
'Polygon': ol.xml.makeReplacer(ol.format.GMLBase.prototype.readPolygon),
'MultiPolygon': ol.xml.makeReplacer(
ol.format.GMLBase.prototype.readMultiPolygon),
'Box': ol.xml.makeReplacer(ol.format.GML2.prototype.readBox_)
}
};