[6380] | 1 | // License: GPL. For details, see LICENSE file.
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[626] | 2 | package org.openstreetmap.josm.io;
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| 3 |
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[782] | 4 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 5 |
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[626] | 6 | import java.io.IOException;
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| 7 | import java.io.InputStream;
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| 8 | import java.net.URLConnection;
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| 9 |
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[1811] | 10 | import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
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| 11 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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[626] | 12 |
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| 13 | /**
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| 14 | * Read from an other reader and increment an progress counter while on the way.
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| 15 | * @author Imi
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| 16 | */
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| 17 | public class ProgressInputStream extends InputStream {
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| 18 |
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[1169] | 19 | private final InputStream in;
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| 20 | private int readSoFar = 0;
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| 21 | private int lastDialogUpdate = 0;
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[1811] | 22 | private boolean sizeKnown;
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[1169] | 23 | private final URLConnection connection;
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[1811] | 24 | private final ProgressMonitor progressMonitor;
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[626] | 25 |
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[1811] | 26 | public ProgressInputStream(URLConnection con, ProgressMonitor progressMonitor) throws OsmTransferException {
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[1169] | 27 | this.connection = con;
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[1811] | 28 | if (progressMonitor == null) {
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| 29 | progressMonitor = NullProgressMonitor.INSTANCE;
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| 30 | }
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| 31 | this.progressMonitor = progressMonitor;
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| 32 | progressMonitor.beginTask(tr("Contacting OSM Server..."), 1);
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| 33 | progressMonitor.indeterminateSubTask(null);
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[626] | 34 |
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[1169] | 35 | try {
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| 36 | this.in = con.getInputStream();
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| 37 | } catch (IOException e) {
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[1875] | 38 | progressMonitor.finishTask();
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[1169] | 39 | if (con.getHeaderField("Error") != null)
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[1670] | 40 | throw new OsmTransferException(tr(con.getHeaderField("Error")));
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| 41 | throw new OsmTransferException(e);
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[1169] | 42 | }
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[626] | 43 |
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[1811] | 44 | updateSize();
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| 45 | if (!sizeKnown) {
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| 46 | progressMonitor.indeterminateSubTask(tr("Downloading OSM data..."));
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[1670] | 47 | }
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[1169] | 48 | }
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[626] | 49 |
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[1169] | 50 | @Override public void close() throws IOException {
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[5874] | 51 | try {
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| 52 | in.close();
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| 53 | } finally {
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| 54 | progressMonitor.finishTask();
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| 55 | }
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[1169] | 56 | }
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[626] | 57 |
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[1169] | 58 | @Override public int read(byte[] b, int off, int len) throws IOException {
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| 59 | int read = in.read(b, off, len);
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[1670] | 60 | if (read != -1) {
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[1169] | 61 | advanceTicker(read);
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[1811] | 62 | } else {
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| 63 | progressMonitor.finishTask();
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[1670] | 64 | }
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[1169] | 65 | return read;
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| 66 | }
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[626] | 67 |
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[1169] | 68 | @Override public int read() throws IOException {
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| 69 | int read = in.read();
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[1670] | 70 | if (read != -1) {
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[1169] | 71 | advanceTicker(1);
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[1811] | 72 | } else {
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| 73 | progressMonitor.finishTask();
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[1670] | 74 | }
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[1169] | 75 | return read;
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| 76 | }
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[626] | 77 |
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[1169] | 78 | /**
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| 79 | * Increase ticker (progress counter and displayed text) by the given amount.
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| 80 | * @param amount
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| 81 | */
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| 82 | private void advanceTicker(int amount) {
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| 83 | readSoFar += amount;
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[1811] | 84 | updateSize();
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[626] | 85 |
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[1169] | 86 | if (readSoFar / 1024 != lastDialogUpdate) {
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| 87 | lastDialogUpdate++;
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[1811] | 88 | if (sizeKnown) {
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| 89 | progressMonitor.setTicks(readSoFar);
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[1670] | 90 | }
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[3005] | 91 | progressMonitor.setExtraText(readSoFar/1024 + " KB");
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[1169] | 92 | }
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| 93 | }
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[1811] | 94 |
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| 95 | private void updateSize() {
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| 96 | if (!sizeKnown && connection.getContentLength() > 0) {
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| 97 | sizeKnown = true;
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| 98 | progressMonitor.subTask(tr("Downloading OSM data..."));
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| 99 | progressMonitor.setTicksCount(connection.getContentLength());
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| 100 | }
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| 101 | }
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[626] | 102 | }
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