001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.tools; 003 004import static org.openstreetmap.josm.tools.I18n.tr; 005 006import java.util.regex.Matcher; 007import java.util.regex.Pattern; 008 009import org.openstreetmap.josm.data.Bounds; 010 011/** 012 * Parses a Geo URL (as specified in <a href="https://tools.ietf.org/html/rfc5870">RFC 5870</a>) into {@link Bounds}. 013 * 014 * Note that Geo URLs are also handled by {@link OsmUrlToBounds}. 015 */ 016public final class GeoUrlToBounds { 017 018 /** 019 * The pattern of a geo: url, having named match groups. 020 */ 021 public static final Pattern PATTERN = Pattern.compile( 022 "geo:(?<lat>[+-]?[0-9.]+),(?<lon>[+-]?[0-9.]+)(?<crs>;crs=wgs84)?(?<uncertainty>;u=[0-9.]+)?(\\?z=(?<zoom>[0-9]+))?"); 023 024 private GeoUrlToBounds() { 025 // Hide default constructor for utils classes 026 } 027 028 /** 029 * Parses a Geo URL (as specified in <a href="https://tools.ietf.org/html/rfc5870">RFC 5870</a>) into {@link Bounds}. 030 * @param url the URL to be parsed 031 * @return the parsed {@link Bounds} 032 */ 033 public static Bounds parse(final String url) { 034 CheckParameterUtil.ensureParameterNotNull(url, "url"); 035 final Matcher m = PATTERN.matcher(url); 036 if (m.matches()) { 037 final double lat; 038 final double lon; 039 final int zoom; 040 try { 041 lat = Double.parseDouble(m.group("lat")); 042 } catch (NumberFormatException e) { 043 Logging.warn(tr("URL does not contain valid {0}", tr("latitude")), e); 044 return null; 045 } 046 try { 047 lon = Double.parseDouble(m.group("lon")); 048 } catch (NumberFormatException e) { 049 Logging.warn(tr("URL does not contain valid {0}", tr("longitude")), e); 050 return null; 051 } 052 try { 053 zoom = m.group("zoom") != null ? Integer.parseInt(m.group("zoom")) : 18; 054 } catch (NumberFormatException e) { 055 Logging.warn(tr("URL does not contain valid {0}", tr("zoom")), e); 056 return null; 057 } 058 return OsmUrlToBounds.positionToBounds(lat, lon, zoom); 059 } else { 060 return null; 061 } 062 } 063}