/******************************************************************************* * Copyright (c) 2015 VoyagerSearch * All rights reserved. This program and the accompanying materials * are made available under the terms of the Apache License, Version 2.0 which * accompanies this distribution and is available at * http://www.apache.org/licenses/LICENSE-2.0.txt ******************************************************************************/ package org.locationtech.spatial4j.io.jts; import java.io.IOException; import java.io.Writer; import java.text.NumberFormat; import org.locationtech.spatial4j.context.SpatialContextFactory; import org.locationtech.spatial4j.context.jts.JtsSpatialContext; import org.locationtech.spatial4j.io.GeoJSONWriter; import org.locationtech.spatial4j.io.LegacyShapeWriter; import org.locationtech.spatial4j.shape.Shape; import org.locationtech.spatial4j.shape.jts.JtsGeometry; import com.vividsolutions.jts.geom.Coordinate; import com.vividsolutions.jts.geom.CoordinateSequence; import com.vividsolutions.jts.geom.Geometry; import com.vividsolutions.jts.geom.GeometryCollection; import com.vividsolutions.jts.geom.LineString; import com.vividsolutions.jts.geom.MultiLineString; import com.vividsolutions.jts.geom.MultiPoint; import com.vividsolutions.jts.geom.MultiPolygon; import com.vividsolutions.jts.geom.Point; import com.vividsolutions.jts.geom.Polygon; public class JtsGeoJSONWriter extends GeoJSONWriter { protected final JtsSpatialContext ctx; public JtsGeoJSONWriter(JtsSpatialContext ctx, SpatialContextFactory factory) { super(ctx, factory); this.ctx = ctx; } // -------------------------------------------------------------- // Write JTS To GeoJSON // -------------------------------------------------------------- protected void write(Writer output, NumberFormat nf, Coordinate coord) throws IOException { output.write('['); output.write(nf.format(coord.x)); output.write(','); output.write(nf.format(coord.y)); output.write(']'); } protected void write(Writer output, NumberFormat nf, CoordinateSequence coordseq) throws IOException { output.write('['); int dim = coordseq.getDimension(); for (int i = 0; i < coordseq.size(); i++) { if (i > 0) { output.write(','); } output.write('['); output.write(nf.format(coordseq.getOrdinate(i, 0))); output.write(','); output.write(nf.format(coordseq.getOrdinate(i, 1))); if (dim > 2) { double v = coordseq.getOrdinate(i, 2); if (!Double.isNaN(v)) { output.write(','); output.write(nf.format(v)); } } output.write(']'); } output.write(']'); } protected void write(Writer output, NumberFormat nf, Coordinate[] coord) throws IOException { output.write('['); for (int i = 0; i < coord.length; i++) { if (i > 0) { output.append(','); } write(output, nf, coord[i]); } output.write(']'); } protected void write(Writer output, NumberFormat nf, Polygon p) throws IOException { output.write('['); write(output, nf, p.getExteriorRing().getCoordinateSequence()); for (int i = 0; i < p.getNumInteriorRing(); i++) { output.append(','); write(output, nf, p.getInteriorRingN(i).getCoordinateSequence()); } output.write(']'); } public void write(Writer output, Geometry geom) throws IOException { NumberFormat nf = LegacyShapeWriter.makeNumberFormat(6); if (geom instanceof Point) { Point v = (Point) geom; output.append("{\"type\":\"Point\",\"coordinates\":"); write(output, nf, v.getCoordinate()); output.append("}"); return; } else if (geom instanceof Polygon) { output.append("{\"type\":\"Polygon\",\"coordinates\":"); write(output, nf, (Polygon) geom); output.append("}"); return; } else if (geom instanceof LineString) { LineString v = (LineString) geom; output.append("{\"type\":\"LineString\",\"coordinates\":"); write(output, nf, v.getCoordinateSequence()); output.append("}"); return; } else if (geom instanceof MultiPoint) { MultiPoint v = (MultiPoint) geom; output.append("{\"type\":\"MultiPoint\",\"coordinates\":"); write(output, nf, v.getCoordinates()); output.append("}"); return; } else if (geom instanceof MultiLineString) { MultiLineString v = (MultiLineString) geom; output.append("{\"type\":\"MultiLineString\",\"coordinates\":["); for (int i = 0; i < v.getNumGeometries(); i++) { if (i > 0) { output.append(','); } write(output, nf, v.getGeometryN(i).getCoordinates()); } output.append("]}"); } else if (geom instanceof MultiPolygon) { MultiPolygon v = (MultiPolygon) geom; output.append("{\"type\":\"MultiPolygon\",\"coordinates\":["); for (int i = 0; i < v.getNumGeometries(); i++) { if (i > 0) { output.append(','); } write(output, nf, (Polygon) v.getGeometryN(i)); } output.append("]}"); } else if (geom instanceof GeometryCollection) { GeometryCollection v = (GeometryCollection) geom; output.append("{\"type\":\"GeometryCollection\",\"geometries\":["); for (int i = 0; i < v.getNumGeometries(); i++) { if (i > 0) { output.append(','); } write(output, v.getGeometryN(i)); } output.append("]}"); } else { throw new UnsupportedOperationException("unknown: " + geom); } } @Override public void write(Writer output, Shape shape) throws IOException { if (shape == null) { throw new NullPointerException("Shape can not be null"); } if (shape instanceof JtsGeometry) { write(output, ((JtsGeometry) shape).getGeom()); return; } super.write(output, shape); } }