Can't use MapFileTileSource in vtm-web

[Ivan3ol]

Hi all! I am trying to build a web app, which would use offline vector tiles via MapFileTileSource, as shown in the code below (create() method in org.oscim.web.client.GwtMap()) - just using MapFileTileSource instead of the default one.

 public void create() {
        MapConfig c = MapConfig.get();

        // stroke text takes about 70% cpu time in firefox:
        // https://bug568526.bugzilla.mozilla.org/attachment.cgi?id=447932
        // <- circle/stroke test 800ms firefox, 80ms chromium..
        // TODO use texture atlas to avoid drawing text-textures
        if (GwtApplication.agentInfo().isLinux() &&
                GwtApplication.agentInfo().isFirefox())
            GwtGdxGraphics.NO_STROKE_TEXT = true;

        GwtGdxGraphics.init();
        GdxAssets.init("");
        DateTimeAdapter.init(new GwtDateTime());
        CanvasAdapter.textScale = 0.7f;
        CanvasAdapter.dpi = (int) (GwtGraphics.getDevicePixelRatioJSNI() * CanvasAdapter.DEFAULT_DPI);
        Tile.SIZE = Tile.calculateTileSize();

        log.debug("GLAdapter.init");
        MapRenderer.setBackgroundColor(0xffffff);
        //Gdx.app.setLogLevel(Application.LOG_DEBUG);

        super.create();

        MapPosition p = new MapPosition();
        p.setZoomLevel(c.getZoom());
        p.setPosition(c.getLatitude(), c.getLongitude());

        MapUrl mapUrl = new MapUrl(mMap);
        mapUrl.parseUrl(p);
        mapUrl.scheduleRepeating(5000);

        mMap.setMapPosition(p);

        String mapName = mapUrl.getParam("map");
        String themeName = mapUrl.getParam("theme");

        VectorTileLayer l = null;

        if (mapName != null) {
            BitmapTileSource ts;

            if ("toner".equals(mapName))
                ts = DefaultSources.STAMEN_TONER.build();
            else if ("osm".equals(mapName)) {
                ts = DefaultSources.OPENSTREETMAP.build();
                ts.setHttpRequestHeaders(Collections.singletonMap("User-Agent", "vtm-web-app"));
            } else if ("watercolor".equals(mapName))
                ts = DefaultSources.STAMEN_WATERCOLOR.build();
            else if ("ne-landcover".equals(mapName))
                ts = DefaultSources.NE_LANDCOVER.build();
            else if ("hikebike".equals(mapName))
                ts = DefaultSources.HIKEBIKE.build();
            else if ("hikebike-hillshade".equals(mapName))
                ts = DefaultSources.HIKEBIKE_HILLSHADE.build();
            else
                ts = DefaultSources.STAMEN_TONER.build();

            mMap.setBaseMap(new BitmapTileLayer(mMap, ts));
        } else {
            MapFileTileSource ts = new MapFileTileSource();
            ts.setMapFile("/Users/user/Downloads/world.mbtiles");
            l = mMap.setBaseMap(ts);

            if (themeName == null) {
                // Local theme with texture atlas using png
                mMap.setTheme(new StreamRenderTheme("", AssetAdapter.readFileAsStream("vtm/default_atlas.xml")));
            } else {
                if ("osmarender".equals(themeName))
                    mMap.setTheme(VtmThemes.OSMARENDER);
                else if ("tron".equals(themeName))
                    mMap.setTheme(VtmThemes.TRONRENDER);
                else if ("newtron".equals(themeName))
                    mMap.setTheme(VtmThemes.NEWTRON);
                else
                    mMap.setTheme(VtmThemes.DEFAULT);
            }
        }

        boolean s3db = mapUrl.params.containsKey("s3db");
        if (s3db) {
            TileSource ts = OSciMap4TileSource.builder()
                    .url("http://opensciencemap.org/tiles/s3db")
                    .zoomMin(16)
                    .zoomMax(16)
                    .build();
            mMap.layers().add(new S3DBTileLayer(mMap, ts));
        }
        if (l != null) {
            boolean nolabels = mapUrl.params.containsKey("nolabels");
            boolean nobuildings = mapUrl.params.containsKey("nobuildings");

            if (!nobuildings && !s3db) {
                mBuildingLayer = new BuildingLayer(mMap, l);
                mBuildingLayer.getExtrusionRenderer().setZLimit((float) 65536 / 10);
                mMap.layers().add(mBuildingLayer);
            }

            mMap.layers().add(new Poi3DLayer(mMap, l));

            if (!nolabels)
                mMap.layers().add(new LabelLayer(mMap, l));
        }

        mSearchBox = new SearchBox(mMap);
    }

However when trying to run it via ./gradlew :vtm-web-app:farmRun, I get such an error messgae:

> Task :vtm-web-app:draftCompileGwt
/Users/user/StudioProjects/else/vtm/vtm-web-app/.
assets
Copying resources from assets to build/gwt/draftOut/
/Users/user/StudioProjects/else/vtm/vtm-web-app/assets
/Users/user/StudioProjects/else/vtm/vtm-web-app/assets
Compiling module org.oscim.web.VtmWebApp
   [ERROR] Errors in 'file:/Users/user/StudioProjects/else/vtm/vtm/src/org/oscim/tiling/source/mapfile/MapFileTileSource.java'
      [ERROR] Line 120: The method getChannel() is undefined for the type FileInputStream
      [ERROR] Line 137: The method getChannel() is undefined for the type FileInputStream
      [ERROR] Line 139: The method size() is undefined for the type FileChannel
      [ERROR] Line 177: The method close() is undefined for the type FileChannel
   Tracing compile failure path for type 'org.oscim.tiling.source.mapfile.MapFileTileSource'
      [ERROR] Errors in 'file:/Users/user/StudioProjects/else/vtm/vtm/src/org/oscim/tiling/source/mapfile/MapFileTileSource.java'
         [ERROR] Line 137: The method getChannel() is undefined for the type FileInputStream
         [ERROR] Line 177: The method close() is undefined for the type FileChannel
         [ERROR] Line 120: The method getChannel() is undefined for the type FileInputStream
         [ERROR] Line 139: The method size() is undefined for the type FileChannel
      [ERROR] Errors in 'file:/Users/user/StudioProjects/else/vtm/vtm/src/org/oscim/tiling/source/mapfile/IMapFileTileSource.java'
         [ERROR] org.oscim.tiling.source.mapfile.MapFileTileSource.Callback cannot be resolved to a type
      [ERROR] Errors in 'file:/Users/user/StudioProjects/else/vtm/vtm/src/org/oscim/tiling/source/mapfile/IndexCache.java'
         [ERROR] Line 105: The method position(long) is undefined for the type FileChannel
         [ERROR] Line 106: The method read(ByteBuffer) is undefined for the type FileChannel
         [ERROR] Line 58: The method synchronizedMap(LRUCache<IndexCacheEntryKey,byte[]>) is undefined for the type Collections
      [ERROR] Errors in 'file:/Users/user/StudioProjects/else/vtm/vtm/src/org/oscim/tiling/source/mapfile/header/MapFileHeader.java'
         [ERROR] org.oscim.tiling.source.mapfile.ReadBuffer cannot be resolved to a type
      [ERROR] Errors in 'file:/Users/user/StudioProjects/else/vtm/vtm/src/org/oscim/tiling/source/mapfile/header/MapFileInfo.java'
         [ERROR] org.oscim.tiling.source.mapfile.header.MapFileInfoBuilder cannot be resolved to a type
      [ERROR] Errors in 'file:/Users/user/StudioProjects/else/vtm/vtm/src/org/oscim/tiling/source/mapfile/ReadBuffer.java'
         [ERROR] Line 105: The method read(ByteBuffer) is undefined for the type FileChannel
         [ERROR] Line 142: The method position(long) is undefined for the type FileChannel
         [ERROR] Line 143: The method read(ByteBuffer) is undefined for the type FileChannel
      [ERROR] Errors in 'file:/Users/user/StudioProjects/else/vtm/vtm/src/org/oscim/tiling/source/mapfile/header/MapFileInfoBuilder.java'
         [ERROR] org.oscim.tiling.source.mapfile.header.OptionalFields cannot be resolved to a type
      [ERROR] Errors in 'file:/Users/user/StudioProjects/else/vtm/vtm/src/org/oscim/tiling/source/mapfile/header/OptionalFields.java'
         [ERROR] org.oscim.tiling.source.mapfile.ReadBuffer cannot be resolved to a type

> Task :vtm-web-app:draftCompileGwt FAILED

BUILD FAILED in 5s
23 actionable tasks: 4 executed, 19 up-to-date

Apparently, there is an empty implementation of FileInputStream in vtm-web/org/oscim/gdx/emu/java/io/FileInputStream.java. When I try to use the proper java.io implementation instead of this one, I get an error message stating the following:

[ERROR] Line 246: No source code is available for type java.io.FileInputStream; did you forget to inherit a required module?

I have earlier used MapFileTileSource on Android build and it worked fine. But I can't get it working on the web build, so could anyone help out with that? Maybe this tile source is not supported for web? Thanks.

[devemux86]

VTM web supports online tiles.

It works with GWT, for extra classes may need work in the emu package.

For offline maps on browser can look other implementations, like the server apps here:
https://github.com/mapsforge/mapsforge/blob/master/docs/Mapsforge-Applications.md