kopia lustrzana https://github.com/onthegomap/planetiler
132 wiersze
4.6 KiB
Java
132 wiersze
4.6 KiB
Java
package com.onthegomap.flatmap.read;
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import com.onthegomap.flatmap.CommonParams;
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import com.onthegomap.flatmap.FileUtils;
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import com.onthegomap.flatmap.Profile;
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import com.onthegomap.flatmap.collections.FeatureGroup;
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import com.onthegomap.flatmap.monitoring.Stats;
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import com.onthegomap.flatmap.worker.Topology;
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import java.io.Closeable;
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import java.io.IOException;
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import java.net.URI;
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import java.nio.file.FileSystems;
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import java.nio.file.Path;
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import org.geotools.data.FeatureSource;
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import org.geotools.data.shapefile.ShapefileDataStore;
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import org.geotools.feature.FeatureCollection;
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import org.geotools.geometry.jts.JTS;
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import org.geotools.referencing.CRS;
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import org.locationtech.jts.geom.Geometry;
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import org.opengis.feature.simple.SimpleFeature;
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import org.opengis.feature.simple.SimpleFeatureType;
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import org.opengis.filter.Filter;
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import org.opengis.referencing.FactoryException;
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import org.opengis.referencing.crs.CoordinateReferenceSystem;
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import org.opengis.referencing.operation.MathTransform;
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public class ShapefileReader extends Reader implements Closeable {
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private final FeatureCollection<SimpleFeatureType, SimpleFeature> inputSource;
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private final String[] attributeNames;
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private final ShapefileDataStore dataStore;
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private MathTransform transformToLatLon;
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public static void process(String sourceProjection, String name, Path input, FeatureGroup writer, CommonParams config,
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Profile profile, Stats stats) {
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try (var reader = new ShapefileReader(sourceProjection, input, profile, stats)) {
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reader.process(name, writer, config);
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}
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}
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public static void process(String name, Path input, FeatureGroup writer, CommonParams config, Profile profile,
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Stats stats) {
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process(null, name, input, writer, config, profile, stats);
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}
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public ShapefileReader(String sourceProjection, Path input, Profile profile, Stats stats) {
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super(profile, stats);
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dataStore = decode(input);
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try {
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String typeName = dataStore.getTypeNames()[0];
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FeatureSource<SimpleFeatureType, SimpleFeature> source =
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dataStore.getFeatureSource(typeName);
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inputSource = source.getFeatures(Filter.INCLUDE);
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CoordinateReferenceSystem src =
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sourceProjection == null ? source.getSchema().getCoordinateReferenceSystem() : CRS.decode(sourceProjection);
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CoordinateReferenceSystem dest = CRS.decode("EPSG:4326", true);
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transformToLatLon = CRS.findMathTransform(src, dest);
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if (transformToLatLon.isIdentity()) {
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transformToLatLon = null;
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}
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attributeNames = new String[inputSource.getSchema().getAttributeCount()];
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for (int i = 0; i < attributeNames.length; i++) {
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attributeNames[i] = inputSource.getSchema().getDescriptor(i).getLocalName();
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}
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} catch (IOException | FactoryException e) {
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throw new RuntimeException(e);
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}
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}
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private ShapefileDataStore decode(Path path) {
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try {
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URI uri;
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if (FileUtils.hasExtension(path, "zip")) {
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try (var zipFs = FileSystems.newFileSystem(path)) {
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Path shapeFileInZip = FileUtils.walkFileSystem(zipFs)
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.filter(z -> FileUtils.hasExtension(z, "shp"))
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.findFirst()
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.orElseThrow(() -> new IllegalArgumentException("No .shp file found inside " + path));
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uri = shapeFileInZip.toUri();
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}
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} else if (FileUtils.hasExtension(path, "shp")) {
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uri = path.toUri();
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} else {
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throw new IllegalArgumentException("Invalid shapefile input: " + path + " must be zip or shp");
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}
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return new ShapefileDataStore(uri.toURL());
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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public ShapefileReader(Path input, Profile profile, Stats stats) {
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this(null, input, profile, stats);
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}
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@Override
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public long getCount() {
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return inputSource.size();
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}
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@Override
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public Topology.SourceStep<ReaderFeature> read() {
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return next -> {
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try (var iter = inputSource.features()) {
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while (iter.hasNext()) {
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SimpleFeature feature = iter.next();
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Geometry source = (Geometry) feature.getDefaultGeometry();
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Geometry latLonGeometry = source;
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if (transformToLatLon != null) {
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latLonGeometry = JTS.transform(source, transformToLatLon);
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}
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if (latLonGeometry != null) {
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ReaderFeature geom = new ReaderFeature(latLonGeometry, attributeNames.length);
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for (int i = 1; i < attributeNames.length; i++) {
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geom.setTag(attributeNames[i], feature.getAttribute(i));
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}
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next.accept(geom);
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}
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}
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}
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};
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}
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@Override
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public void close() {
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dataStore.dispose();
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}
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}
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