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Provide a method for parsing any GeoJSON as an array of features

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This commit is contained in:
Tim Schaub
2013-08-07 11:25:40 -06:00
parent 1f588821b4
commit 254f325f29
2 changed files with 326 additions and 44 deletions
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261
test/spec/ol/parser/geojson.test.js
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@@ -267,6 +267,267 @@ describe('ol.parser.GeoJSON', function() {
});
describe('#parseAsFeatureCollection_()', function() {
it('returns an array of features for FeatureCollection', function() {
var pointVertices = new ol.geom.SharedVertices();
var lineVertices = new ol.geom.SharedVertices();
var polygonVertices = new ol.geom.SharedVertices();
var lookup = {
'point': pointVertices,
'linestring': lineVertices,
'polygon': polygonVertices,
'multipoint': pointVertices,
'multilinstring': lineVertices,
'multipolygon': polygonVertices
};
var callback = function(feature, type) {
return lookup[type];
};
var parser = new ol.parser.GeoJSON();
var json = {
type: 'FeatureCollection',
features: [{
type: 'Feature',
properties: {
foo: 'bar'
},
geometry: {
type: 'Point',
coordinates: [1, 2]
}
}, {
type: 'Feature',
properties: {
bam: 'baz'
},
geometry: {
type: 'LineString',
coordinates: [[1, 2], [3, 4]]
}
}]
};
var features = parser.parseAsFeatureCollection_(json,
{callback: callback});
expect(features.length).to.be(2);
var first = features[0];
expect(first).to.be.a(ol.Feature);
expect(first.get('foo')).to.be('bar');
expect(first.getGeometry()).to.be.a(ol.geom.Point);
var second = features[1];
expect(second).to.be.a(ol.Feature);
expect(second.get('bam')).to.be('baz');
expect(second.getGeometry()).to.be.a(ol.geom.LineString);
expect(pointVertices.coordinates.length).to.be(2);
expect(lineVertices.coordinates.length).to.be(4);
expect(polygonVertices.coordinates.length).to.be(0);
});
it('returns an array of features for Feature', function() {
var pointVertices = new ol.geom.SharedVertices();
var lineVertices = new ol.geom.SharedVertices();
var polygonVertices = new ol.geom.SharedVertices();
var lookup = {
'point': pointVertices,
'linestring': lineVertices,
'polygon': polygonVertices,
'multipoint': pointVertices,
'multilinstring': lineVertices,
'multipolygon': polygonVertices
};
var callback = function(feature, type) {
return lookup[type];
};
var parser = new ol.parser.GeoJSON();
var json = {
type: 'Feature',
properties: {
bam: 'baz'
},
geometry: {
type: 'LineString',
coordinates: [[1, 2], [3, 4]]
}
};
var features = parser.parseAsFeatureCollection_(json,
{callback: callback});
expect(features.length).to.be(1);
var first = features[0];
expect(first).to.be.a(ol.Feature);
expect(first.get('bam')).to.be('baz');
expect(first.getGeometry()).to.be.a(ol.geom.LineString);
expect(pointVertices.coordinates.length).to.be(0);
expect(lineVertices.coordinates.length).to.be(4);
expect(polygonVertices.coordinates.length).to.be(0);
});
it('returns an array of features for GeometryCollection', function() {
var pointVertices = new ol.geom.SharedVertices();
var lineVertices = new ol.geom.SharedVertices();
var polygonVertices = new ol.geom.SharedVertices();
var lookup = {
'point': pointVertices,
'linestring': lineVertices,
'polygon': polygonVertices,
'multipoint': pointVertices,
'multilinstring': lineVertices,
'multipolygon': polygonVertices
};
var callback = function(feature, type) {
return lookup[type];
};
var parser = new ol.parser.GeoJSON();
var json = {
type: 'GeometryCollection',
geometries: [{
type: 'Point',
coordinates: [1, 2]
}, {
type: 'LineString',
coordinates: [[3, 4], [5, 6]]
}, {
type: 'Polygon',
coordinates: [[[7, 8], [9, 10], [11, 12], [7, 8]]]
}]
};
var features = parser.parseAsFeatureCollection_(json,
{callback: callback});
expect(features.length).to.be(3);
expect(features[0].getGeometry()).to.be.a(ol.geom.Point);
expect(features[1].getGeometry()).to.be.a(ol.geom.LineString);
expect(features[2].getGeometry()).to.be.a(ol.geom.Polygon);
expect(pointVertices.coordinates.length).to.be(2);
expect(lineVertices.coordinates.length).to.be(4);
expect(polygonVertices.coordinates.length).to.be(8);
});
it('returns an array of features for Point', function() {
var pointVertices = new ol.geom.SharedVertices();
var lineVertices = new ol.geom.SharedVertices();
var polygonVertices = new ol.geom.SharedVertices();
var lookup = {
'point': pointVertices,
'linestring': lineVertices,
'polygon': polygonVertices,
'multipoint': pointVertices,
'multilinstring': lineVertices,
'multipolygon': polygonVertices
};
var callback = function(feature, type) {
return lookup[type];
};
var parser = new ol.parser.GeoJSON();
var json = {
type: 'Point',
coordinates: [1, 2]
};
var features = parser.parseAsFeatureCollection_(json,
{callback: callback});
expect(features.length).to.be(1);
expect(features[0].getGeometry()).to.be.a(ol.geom.Point);
expect(pointVertices.coordinates.length).to.be(2);
expect(lineVertices.coordinates.length).to.be(0);
expect(polygonVertices.coordinates.length).to.be(0);
});
it('returns an array of features for LineString', function() {
var pointVertices = new ol.geom.SharedVertices();
var lineVertices = new ol.geom.SharedVertices();
var polygonVertices = new ol.geom.SharedVertices();
var lookup = {
'point': pointVertices,
'linestring': lineVertices,
'polygon': polygonVertices,
'multipoint': pointVertices,
'multilinstring': lineVertices,
'multipolygon': polygonVertices
};
var callback = function(feature, type) {
return lookup[type];
};
var parser = new ol.parser.GeoJSON();
var json = {
type: 'LineString',
coordinates: [[3, 4], [5, 6]]
};
var features = parser.parseAsFeatureCollection_(json,
{callback: callback});
expect(features.length).to.be(1);
expect(features[0].getGeometry()).to.be.a(ol.geom.LineString);
expect(pointVertices.coordinates.length).to.be(0);
expect(lineVertices.coordinates.length).to.be(4);
expect(polygonVertices.coordinates.length).to.be(0);
});
it('returns an array of features for Polygon', function() {
var pointVertices = new ol.geom.SharedVertices();
var lineVertices = new ol.geom.SharedVertices();
var polygonVertices = new ol.geom.SharedVertices();
var lookup = {
'point': pointVertices,
'linestring': lineVertices,
'polygon': polygonVertices,
'multipoint': pointVertices,
'multilinstring': lineVertices,
'multipolygon': polygonVertices
};
var callback = function(feature, type) {
return lookup[type];
};
var parser = new ol.parser.GeoJSON();
var json = {
type: 'Polygon',
coordinates: [[[7, 8], [9, 10], [11, 12], [7, 8]]]
};
var features = parser.parseAsFeatureCollection_(json,
{callback: callback});
expect(features.length).to.be(1);
expect(features[0].getGeometry()).to.be.a(ol.geom.Polygon);
expect(pointVertices.coordinates.length).to.be(0);
expect(lineVertices.coordinates.length).to.be(0);
expect(polygonVertices.coordinates.length).to.be(8);
});
});
});
goog.require('ol.Feature');