001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.io; 003 004import java.util.Set; 005 006import org.openstreetmap.josm.data.osm.OsmPrimitiveType; 007import org.openstreetmap.josm.gui.preferences.server.OverpassServerPreference; 008import org.openstreetmap.josm.tools.Utils; 009 010/** 011 * Retrieves a set of {@link org.openstreetmap.josm.data.osm.OsmPrimitive}s from an Overpass API server. 012 * 013 * @since 9241 014 */ 015class MultiFetchOverpassObjectReader extends MultiFetchServerObjectReader { 016 017 @Override 018 protected String buildRequestString(final OsmPrimitiveType type, Set<Long> idPackage) { 019 final Utils.Function<Long, Object> toOverpassExpression = new Utils.Function<Long, Object>() { 020 @Override 021 public Object apply(Long x) { 022 return type.getAPIName() + '(' + x + ");>;"; 023 } 024 }; 025 final String query = '(' + Utils.join("", Utils.transform(idPackage, toOverpassExpression)) + ");out meta;"; 026 return "interpreter?data=" + Utils.encodeUrl(query); 027 } 028 029 @Override 030 protected String getBaseUrl() { 031 return OverpassServerPreference.getOverpassServer(); 032 } 033 034 @Override 035 protected boolean recursesDown() { 036 // see https://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL#Recurse_down_.28.3E.29 for documentation 037 // accomplished using >; in the query string above 038 return true; 039 } 040}