Examples of org.openstreetmap.josm.data.osm.DataSet

org.openstreetmap.josm.data.osm.DataSet
o something with dataset } finally { ds.getReadLock().unlock(); } Write lock should be used in case of bulk operations. In addition to ensuring that other threads can't use dataset in the middle of modifications it also stops sending of dataset events. That's good for performance reasons - GUI can be updated after all changes are done. Sample usage: ds.beginUpdate() try { // .. do modifications } finally { ds.endUpdate(); } Note that it is not necessary to call beginUpdate/endUpdate for every dataset modification - dataset will get locked automatically. Note that locks cannot be upgraded - if one threads use read lock and and then write lock, dead lock will occur - see #5814 for sample ticket @author imi

                    }
                    rememberChildRelationsToDownload(r);
                    progressMonitor.setCustomText(tr("Downloading relation {0}", r.getDisplayName(DefaultNameFormatter.getInstance())));
                    OsmServerObjectReader reader = new OsmServerObjectReader(r.getId(), OsmPrimitiveType.RELATION,
                            true);
                    DataSet dataSet = null;
                    try {
                        dataSet = reader.parseOsm(progressMonitor
                                .createSubTaskMonitor(ProgressMonitor.ALL_TICKS, false));
                    } catch(OsmApiException e) {
                        if (e.getResponseCode() == HttpURLConnection.HTTP_GONE) {

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                        continue;
                    }
                    progressMonitor.setCustomText(tr("Downloading relation {0}", r.getDisplayName(DefaultNameFormatter.getInstance())));
                    OsmServerObjectReader reader = new OsmServerObjectReader(r.getId(), OsmPrimitiveType.RELATION,
                            true);
                    DataSet dataSet = reader.parseOsm(progressMonitor
                            .createSubTaskMonitor(ProgressMonitor.ALL_TICKS, false));
                    mergeDataSet(dataSet);
                    refreshView(r);
                }
            } catch (Exception e) {

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    }


    @Override
    protected void realRun() throws SAXException, IOException, OsmTransferException {
        try {
            final DataSet allDownloads = new DataSet();
            int i=0;
            getProgressMonitor().setTicksCount(relations.size());
            for (Relation relation: relations) {
                i++;
                getProgressMonitor().setCustomText(tr("({0}/{1}): Downloading relation ''{2}''...", i,relations.size(),relation.getDisplayName(DefaultNameFormatter.getInstance())));
                synchronized (this) {
                    if (canceled) return;
                    objectReader = new OsmServerObjectReader(relation.getPrimitiveId(), true /* full download */);
                }
                DataSet dataSet = objectReader.parseOsm(
                        getProgressMonitor().createSubTaskMonitor(0, false)
                );
                if (dataSet == null)
                    return;
                synchronized (this) {

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        if (!needsRepaint && !drawTargetHighlight)
            return false;


        // update selection to reflect which way being modified
        DataSet currentDataSet = getCurrentDataSet();
        if (currentBaseNode != null && currentDataSet != null && !currentDataSet.getSelected().isEmpty()) {
            Way continueFrom = getWayForNode(currentBaseNode);
            if (alt && continueFrom != null && (!currentBaseNode.isSelected() || continueFrom.isSelected())) {
                addRemoveSelection(currentDataSet, currentBaseNode, continueFrom);
                needsRepaint = true;
            } else if (!alt && continueFrom != null && !continueFrom.isSelected()) {
                currentDataSet.addSelected(continueFrom);
                needsRepaint = true;
            }
        }


        if(needsRepaint) {

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        Main.map.keyDetector.removeModifierListener(this);


        // when exiting we let everybody know about the currently selected
        // primitives
        //
        DataSet ds = getCurrentDataSet();
        if(ds != null) {
            ds.fireSelectionChanged();
        }
    }

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        // keyDetector didn't make it through the security manager. Unclear
        // if that can ever happen but better be safe.
        updateKeyModifiers(e);
        mousePos = e.getPoint();


        DataSet ds = getCurrentDataSet();
        Collection<OsmPrimitive> selection = new ArrayList<>(ds.getSelected());
        Collection<Command> cmds = new LinkedList<>();
        Collection<OsmPrimitive> newSelection = new LinkedList<>(ds.getSelected());


        List<Way> reuseWays = new ArrayList<>(),
                replacedWays = new ArrayList<>();
        boolean newNode = false;
        Node n = null;

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     * For this case, this method returns the current way as selection,
     * to work around this issue.
     * Otherwise the normal selection of the current data layer is returned.
     */
    public Collection<OsmPrimitive> getInProgressSelection() {
        DataSet ds = getCurrentDataSet();
        if (ds == null) return null;
        if (currentBaseNode != null && !ds.getSelected().isEmpty()) {
            Way continueFrom = getWayForNode(currentBaseNode);
            if (continueFrom != null)
                return Collections.<OsmPrimitive>singleton(continueFrom);
        }
        return ds.getSelected();
    }

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    /**
     * Slow method to import all currently highlighted primitives into this instance
     */
    public void findAllHighlighted() {
        DataSet ds = Main.main.getCurrentDataSet();
        if (ds!=null) {
            highlightedPrimitives.addAll( ds.allNonDeletedPrimitives() );
        }
    }

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    /**
     * Slow method to remove highlights from all primitives
     */
    public static void clearAllHighlighted() {
        DataSet ds = Main.main.getCurrentDataSet();
        if (ds!=null) {
            for (OsmPrimitive p: ds.allNonDeletedPrimitives()) {
                p.setHighlighted(false);
            }
        }
    }

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    }


    @Override
    public void showNotify() {
        DataSet.addSelectionListener(this);
        DataSet ds = Main.main.getCurrentDataSet();
        if (ds != null) {
            updateSelection(ds.getAllSelected());
        }
        MapView.addLayerChangeListener(this);
        Layer activeLayer = Main.map.mapView.getActiveLayer();
        if (activeLayer != null) {
            activeLayerChange(null, activeLayer);

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