| 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.gui.io;
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| 3 |
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| 4 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 5 |
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| 6 | import java.io.IOException;
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| 7 |
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| 8 | import org.openstreetmap.josm.data.Bounds;
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| 9 | import org.openstreetmap.josm.data.osm.DataSet;
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| 10 | import org.openstreetmap.josm.data.osm.DataSetMerger;
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| 11 | import org.openstreetmap.josm.gui.ExceptionDialogUtil;
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| 12 | import org.openstreetmap.josm.gui.PleaseWaitRunnable;
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| 13 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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| 14 | import org.openstreetmap.josm.io.OsmTransferException;
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| 15 | import org.openstreetmap.josm.io.OverpassDownloadReader;
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| 16 | import org.xml.sax.SAXException;
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| 17 |
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| 18 | /**
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| 19 | * Download OSM data from Overpass API
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| 20 | *
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| 21 | */
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| 22 | public class DownloadFromOverpassTask extends PleaseWaitRunnable {
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| 23 | private boolean canceled;
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| 24 | private final String request;
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| 25 | private final DataSet ds;
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| 26 | private Exception lastException;
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| 27 |
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| 28 | /**
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| 29 | * Constructor
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| 30 | * @param request the overpass query
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| 31 | * @param ds the {@code DataSet} instance that should contain the downloaded data
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| 32 | * @param monitor ProgressMonitor to use or null to create a new one.
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| 33 | */
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| 34 | public DownloadFromOverpassTask(String request, DataSet ds, ProgressMonitor monitor) {
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| 35 | super(tr("Download objects via Overpass API"), monitor, false);
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| 36 | this.request = request;
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| 37 | this.ds = ds;
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| 38 | }
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| 39 |
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| 40 | @Override
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| 41 | protected void cancel() {
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| 42 | canceled = true;
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| 43 | }
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| 44 |
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| 45 | @Override
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| 46 | protected void realRun() throws SAXException, IOException, OsmTransferException {
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| 47 | try {
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| 48 | OverpassDownloadReader reader = new OverpassDownloadReader(new Bounds(0, 0, 0, 0),
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| 49 | OverpassDownloadReader.OVERPASS_SERVER.get(), request);
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| 50 | DataSet tmpDs = reader.parseOsm(progressMonitor.createSubTaskMonitor(1, false));
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| 51 | if (!canceled) {
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| 52 | new DataSetMerger(ds, tmpDs).merge();
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| 53 | }
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| 54 | } catch (OsmTransferException e) {
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| 55 | if (canceled)
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| 56 | return;
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| 57 | lastException = e;
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| 58 | }
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| 59 |
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| 60 | }
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| 61 |
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| 62 | @Override
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| 63 | protected void finish() {
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| 64 | if (canceled)
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| 65 | return;
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| 66 | if (lastException != null) {
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| 67 | ExceptionDialogUtil.explainException(lastException);
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| 68 | }
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| 69 | }
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| 70 | }
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