vtm/vtm-tests/test/org/oscim/tiling/source/TestTileSource.java

/*
 * Copyright 2012 Hannes Janetzek
 *
 * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.tiling.source;

import org.oscim.core.MapElement;
import org.oscim.core.Tag;
import org.oscim.core.Tile;
import org.oscim.layers.tile.MapTile;
import org.oscim.tiling.ITileDataSink;
import org.oscim.tiling.ITileDataSource;
import org.oscim.tiling.TileSource;

import static org.oscim.tiling.QueryResult.SUCCESS;

public class TestTileSource extends TileSource {

    // private boolean mOpenFile = false;

    public TestTileSource() {
        super(0, 18);
    }

    @Override
    public ITileDataSource getDataSource() {
        return new TileDataSource();
    }

    @Override
    public OpenResult open() {
        // mOpenFile =true;
        return OpenResult.SUCCESS;
    }

    @Override
    public void close() {
        // mOpenFile = false;
    }

    static class TileDataSource implements ITileDataSource {

        private static final Tag[] mTags = {
                new Tag("natural", "water")
        };
        private static final Tag[] mTagsWay = {
                new Tag("highway", "primary"),
                new Tag("name", "Highway Rd")
        };
        private static final Tag[] mTagsBoundary = {
                new Tag("boundary", "administrative"),
                new Tag("admin_level", "2")
        };

        private static final Tag[] mTagsPlace = {
                new Tag("place", "city"),
                null
        };

        private final MapElement mElem;

        public TileDataSource() {
            mElem = new MapElement();
        }

        private boolean renderWays = true;
        private boolean renderBoundary = true;
        private boolean renderPlace = false;

        @Override
        public void query(MapTile tile, ITileDataSink sink) {

            int size = Tile.SIZE;
            MapElement e = mElem;

            float x1 = -1;
            float y1 = -1;
            float x2 = size + 1;
            float y2 = size + 1;

            // always clear geometry before starting
            // a different type.
            e.clear();
            e.startPolygon();
            e.addPoint(x1, y1);
            e.addPoint(x2, y1);
            e.addPoint(x2, y2);
            e.addPoint(x1, y2);

            y1 = 5;
            y2 = size - 5;
            x1 = 5;
            x2 = size - 5;

            e.startHole();
            e.addPoint(x1, y1);
            e.addPoint(x2, y1);
            e.addPoint(x2, y2);
            e.addPoint(x1, y2);

            e.setLayer(0);
            e.tags.set(mTags);
            sink.process(e);

            if (renderWays) {
                e.clear();

                // middle horizontal
                e.startLine();
                e.addPoint(0, size / 2);
                e.addPoint(size, size / 2);

                // center up
                e.startLine();
                e.addPoint(size / 2, -size / 2);
                e.addPoint(size / 2, size / 2);

                // center down
                e.startLine();
                e.addPoint(size / 2, size / 2);
                e.addPoint(size / 2, size / 2 + size);

                // //e.setLayer(mTagsWay, 0);
                sink.process(e);

                e.clear();
                // left-top to center
                e.startLine();
                e.addPoint(size / 2, size / 2);
                e.addPoint(10, 10);

                e.startLine();
                e.addPoint(0, 10);
                e.addPoint(size, 10);

                e.startLine();
                e.addPoint(10, 0);
                e.addPoint(10, size);

                e.setLayer(1);
                e.tags.set(mTagsWay);
                sink.process(e);
            }

            if (renderBoundary) {
                e.clear();
                e.startPolygon();
                float r = size / 2;

                for (int i = 0; i < 360; i += 4) {
                    double d = Math.toRadians(i);
                    e.addPoint(r + (float) Math.cos(d) * (r - 40),
                            r + (float) Math.sin(d) * (r - 40));
                }

                e.setLayer(1);
                e.tags.set(mTagsBoundary);
                sink.process(e);
            }

            if (renderPlace) {
                e.clear();
                e.startPoints();
                e.addPoint(size / 2, size / 2);

                mTagsPlace[1] = new Tag("name", tile.toString());
                e.tags.set(mTagsPlace);
                sink.process(e);
            }

            sink.completed(SUCCESS);
        }

        @Override
        public void dispose() {
        }

        @Override
        public void cancel() {
        }
    }

}