public static <T extends FeatureType, F extends org.opengis.feature.Feature> void featuresToJson(
FeatureCollection<T, F> collection, JSONBuilder json, boolean returnGeometry)
throws IOException {
FeatureIterator<F> iterator = collection.features();
T schema = collection.getSchema();
json.object().key("objectIdFieldName").value("objectid").key("globalIdFieldName").value("");
if (returnGeometry) {
GeometryDescriptor geometryDescriptor = schema.getGeometryDescriptor();
if (geometryDescriptor == null)
throw new RuntimeException(
"No geometry descriptor for type " + schema + "; " + schema.getDescriptors());
GeometryType geometryType = geometryDescriptor.getType();
if (geometryType == null) throw new RuntimeException("No geometry type for type " + schema);
Class<?> binding = geometryType.getBinding();
if (binding == null) throw new RuntimeException("No binding for geometry type " + schema);
GeometryTypeEnum geometryTypeEnum = GeometryTypeEnum.forJTSClass(binding);
json.key("geometryType").value(geometryTypeEnum.getGeometryType());
}
if (schema.getCoordinateReferenceSystem() != null) {
try {
SpatialReference sr = SpatialReferences.fromCRS(schema.getCoordinateReferenceSystem());
json.key("spatialReference");
SpatialReferenceEncoder.toJson(sr, json);
} catch (FactoryException e) {
throw new RuntimeException(e);
}
}
json.key("fields").array();
for (PropertyDescriptor desc : schema.getDescriptors()) {
if (schema.getGeometryDescriptor() != null
&& !desc.getName().equals(schema.getGeometryDescriptor().getName())) {
descriptorToJson(desc, json);
}
}
json.endArray();
try {
json.key("features");
json.array();
while (iterator.hasNext()) {
F feature = iterator.next();
featureToJson(feature, json, returnGeometry);
}
json.endArray();
} finally {
iterator.close();
}
json.endObject();
}
/**
* Overrides to handle the case of encoding {@code java.util.Date} and its date/time/timestamp
* descendants, as well as {@code java.util.Calendar} instances as ISO 8601 strings. In addition
* handles rounding numbers to the specified number of decimal points.
*
* @see net.sf.json.util.JSONBuilder#value(java.lang.Object)
*/
@Override
public GeoJSONBuilder value(Object value) {
if (value instanceof java.util.Date || value instanceof Calendar) {
value = Converters.convert(value, String.class);
}
super.value(value);
return this;
}
public static void featureToJson(
org.opengis.feature.Feature feature, JSONBuilder json, boolean returnGeometry) {
GeometryAttribute geometry = feature.getDefaultGeometryProperty();
json.object();
if (returnGeometry) {
json.key("geometry");
GeometryEncoder.toJson((com.vividsolutions.jts.geom.Geometry) geometry.getValue(), json);
}
json.key("attributes");
json.object();
json.key("objectid").value(adaptId(feature.getIdentifier().getID()));
for (Property prop : feature.getProperties()) {
if (geometry == null || !prop.getName().equals(geometry.getName())) {
final Object value;
if (prop.getValue() instanceof java.util.Date) {
value = ((java.util.Date) prop.getValue()).getTime();
} else {
value = prop.getValue();
}
json.key(prop.getName().getLocalPart()).value(value);
}
}
json.endObject();
json.endObject();
}
@Test
public void testIconRenderer() throws Exception {
StyleFactory factory = CommonFactoryFinder.getStyleFactory();
SLDParser parser = new SLDParser(factory, getClass().getResource("mark.sld"));
org.geotools.styling.Style sld = parser.readXML()[0];
JSONBuilder json = new JSONStringer();
Renderer renderer = StyleEncoder.styleToRenderer((org.geotools.styling.Style) sld);
assertNotNull(renderer);
StyleEncoder.encodeRenderer(json, renderer);
JSONObject object = JSONObject.fromObject(json.toString());
JSONObject symbol = object.getJSONObject("symbol");
String url = symbol.getString("url");
String contentType = symbol.getString("contentType");
int width = symbol.getInt("width");
int height = symbol.getInt("height");
assertTrue(url.endsWith("example.jpg"));
assertEquals("image/jpeg", contentType);
assertEquals(64, width);
assertEquals(64, height);
}
private static void descriptorToJson(PropertyDescriptor desc, JSONBuilder json) {
String name = desc.getName().getLocalPart();
FieldTypeEnum type = FieldTypeEnum.forClass(desc.getType().getBinding());
String alias = name;
// TODO: For text fields we are expected to include a "length" field.
json.object()
.key("name")
.value(name)
.key("type")
.value(type.getFieldType())
.key("alias")
.value(alias)
.endObject();
}
public static <T extends FeatureType, F extends Feature> void featureIdSetToJson(
FeatureCollection<T, F> features, JSONBuilder json) {
json.object();
json.key("objectIdFieldName");
json.value("objectid"); // TODO: Advertise "real" identifier property
FeatureIterator<F> iterator = features.features();
try {
json.key("objectIds");
json.array();
while (iterator.hasNext()) {
F feature = iterator.next();
json.value(adaptId(feature.getIdentifier().getID()));
}
json.endArray();
} finally {
iterator.close();
}
json.endObject();
}
private void roundedValue(double value) {
super.value(RoundingUtil.round(value, numDecimals));
}