source: josm/trunk/src/org/openstreetmap/josm/io/session/GpxTracksSessionExporter.java@ 18287

// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.io.session;

import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.nio.charset.StandardCharsets;
import java.time.Instant;

import org.openstreetmap.josm.gui.layer.GpxLayer;
import org.openstreetmap.josm.io.GpxWriter;

/**
 * Session exporter for {@link GpxLayer}.
 * @since 5501
 */
public class GpxTracksSessionExporter extends GenericSessionExporter<GpxLayer> {

    private Instant metaTime;

    /**
     * Constructs a new {@code GpxTracksSessionExporter}.
     * @param layer GPX layer to export
     */
    public GpxTracksSessionExporter(GpxLayer layer) { // NO_UCD (test only)
        this(layer, "tracks");
    }

    protected GpxTracksSessionExporter(GpxLayer layer, String type) {
        super(layer, type, "0.1", "gpx");
        if (layer.data == null) {
            throw new IllegalArgumentException("GPX layer without data: " + layer);
        }
    }

    @Override
    @SuppressWarnings("resource")
    protected void addDataFile(OutputStream out) {
        Writer writer = new OutputStreamWriter(out, StandardCharsets.UTF_8);
        GpxWriter w = new GpxWriter(new PrintWriter(writer));
        if (metaTime != null) {
            w.setMetaTime(metaTime);
        }
        w.write(layer.data);
        w.flush();
    }

    protected void setMetaTime(Instant metaTime) {
        this.metaTime = metaTime;
    }
}