[7937] | 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.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.InputStream;
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| 7 | import java.util.Arrays;
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| 8 |
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| 9 | import javax.xml.stream.XMLStreamConstants;
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| 10 | import javax.xml.stream.XMLStreamException;
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| 11 |
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| 12 | import org.openstreetmap.josm.data.osm.DataSet;
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| 13 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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| 14 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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| 15 |
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| 16 | /**
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| 17 | * Reader for <a href="http://wiki.openstreetmap.org/wiki/OsmChange">OsmChange</a> file format.
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| 18 | */
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| 19 | public class OsmChangeReader extends OsmReader {
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| 20 |
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| 21 | /**
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| 22 | * List of possible actions.
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| 23 | */
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| 24 | private static final String[] ACTIONS = {"create", "modify", "delete"};
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| 25 |
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| 26 | /**
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| 27 | * constructor (for private and subclasses use only)
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| 28 | *
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| 29 | * @see #parseDataSet(InputStream, ProgressMonitor)
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| 30 | */
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| 31 | protected OsmChangeReader() {
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[8415] | 32 | // Restricts visibility
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[7937] | 33 | }
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| 34 |
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| 35 | @Override
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| 36 | protected void parseRoot() throws XMLStreamException {
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| 37 | if ("osmChange".equals(parser.getLocalName())) {
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| 38 | parseOsmChange();
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| 39 | } else {
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| 40 | parseUnknown();
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| 41 | }
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| 42 | }
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| 43 |
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| 44 | private void parseOsmChange() throws XMLStreamException {
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| 45 | String v = parser.getAttributeValue(null, "version");
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| 46 | if (v == null) {
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| 47 | throwException(tr("Missing mandatory attribute ''{0}''.", "version"));
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| 48 | }
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| 49 | if (!"0.6".equals(v)) {
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| 50 | throwException(tr("Unsupported version: {0}", v));
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| 51 | }
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| 52 | ds.setVersion(v);
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| 53 | while (parser.hasNext()) {
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| 54 | int event = parser.next();
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| 55 | if (event == XMLStreamConstants.START_ELEMENT) {
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| 56 | if (Arrays.asList(ACTIONS).contains(parser.getLocalName())) {
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| 57 | parseCommon(parser.getLocalName());
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| 58 | } else {
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| 59 | parseUnknown();
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| 60 | }
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| 61 | } else if (event == XMLStreamConstants.END_ELEMENT) {
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| 62 | return;
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| 63 | }
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| 64 | }
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| 65 | }
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| 66 |
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| 67 | private void parseCommon(String action) throws XMLStreamException {
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| 68 | while (parser.hasNext()) {
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| 69 | int event = parser.next();
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| 70 | if (event == XMLStreamConstants.START_ELEMENT) {
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| 71 | OsmPrimitive p = null;
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| 72 | switch (parser.getLocalName()) {
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| 73 | case "node":
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| 74 | p = parseNode();
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| 75 | break;
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| 76 | case "way":
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| 77 | p = parseWay();
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| 78 | break;
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| 79 | case "relation":
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| 80 | p = parseRelation();
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| 81 | break;
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| 82 | default:
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| 83 | parseUnknown();
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| 84 | }
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| 85 | if (p != null && action != null) {
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| 86 | if ("modify".equals(action)) {
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| 87 | p.setModified(true);
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| 88 | } else if ("delete".equals(action)) {
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| 89 | p.setDeleted(true);
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| 90 | }
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| 91 | }
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| 92 | } else if (event == XMLStreamConstants.END_ELEMENT) {
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| 93 | return;
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| 94 | }
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| 95 | }
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| 96 | }
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| 97 |
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| 98 | /**
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| 99 | * Parse the given input source and return the dataset.
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| 100 | *
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| 101 | * @param source the source input stream. Must not be <code>null</code>.
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| 102 | * @param progressMonitor the progress monitor. If <code>null</code>,
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| 103 | * {@link org.openstreetmap.josm.gui.progress.NullProgressMonitor#INSTANCE} is assumed
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| 104 | *
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| 105 | * @return the dataset with the parsed data
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[8291] | 106 | * @throws IllegalDataException if the an error was found while parsing the data from the source
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| 107 | * @throws IllegalArgumentException if source is <code>null</code>
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[7937] | 108 | */
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| 109 | public static DataSet parseDataSet(InputStream source, ProgressMonitor progressMonitor) throws IllegalDataException {
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| 110 | return new OsmChangeReader().doParseDataSet(source, progressMonitor);
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| 111 | }
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| 112 | }
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