/** @return a byte array with the vector tile */
public byte[] encode() {
VectorTile.Tile tile = new VectorTile.Tile();
List<VectorTile.Tile.Layer> tileLayers = new ArrayList<VectorTile.Tile.Layer>();
for (Map.Entry<String, Layer> e : layers.entrySet()) {
String layerName = e.getKey();
Layer layer = e.getValue();
VectorTile.Tile.Layer tileLayer = new VectorTile.Tile.Layer();
tileLayer.version = 1;
tileLayer.name = layerName;
tileLayer.keys = layer.keys();
List<VectorTile.Tile.Value> values = new ArrayList<VectorTile.Tile.Value>();
for (Object value : layer.values()) {
VectorTile.Tile.Value tileValue = new VectorTile.Tile.Value();
if (value instanceof String) {
tileValue.setStringValue((String) value);
} else if (value instanceof Integer) {
tileValue.setSintValue(((Integer) value).intValue());
} else if (value instanceof Long) {
tileValue.setSintValue(((Long) value).longValue());
} else if (value instanceof Float) {
tileValue.setFloatValue(((Float) value).floatValue());
} else if (value instanceof Double) {
tileValue.setDoubleValue(((Double) value).doubleValue());
} else {
tileValue.setStringValue(value.toString());
}
values.add(tileValue);
}
tileLayer.values = values.toArray(new VectorTile.Tile.Value[values.size()]);
tileLayer.setExtent(extent);
List<VectorTile.Tile.Feature> features = new ArrayList<VectorTile.Tile.Feature>();
for (Feature feature : layer.features) {
Geometry geometry = feature.geometry;
VectorTile.Tile.Feature featureBuilder = new VectorTile.Tile.Feature();
featureBuilder.tags = toIntArray(feature.tags);
featureBuilder.setType(toGeomType(geometry));
featureBuilder.geometry = toIntArray(commands(geometry));
features.add(featureBuilder);
}
tileLayer.features = features.toArray(new VectorTile.Tile.Feature[features.size()]);
tileLayers.add(tileLayer);
}
tile.layers = tileLayers.toArray(new VectorTile.Tile.Layer[tileLayers.size()]);
return MessageNano.toByteArray(tile);
}
