public Optional<BoardTileModel> placeTileModel(
GridModel.GridPosition gridPosition, ConveyorTileModel conveyorTileModel) {
if (cannotPlaceTileAtPosition(gridPosition)) return Optional.absent();
BoardTileModel boardTileModel = boardTileModelFactory.createTileModel(conveyorTileModel);
gridModel.set(gridPosition, boardTileModel);
return Optional.of(boardTileModel);
}
public void placeSourceAndSink() {
GridModel.GridPosition gridPosition =
new GridModel.GridPosition(random.nextInt(numRows), random.nextInt(numCols));
sourceTileModel = boardTileModelFactory.createTileModel(BoardTileType.START_PIPE);
boolean placedSource = placeTileModel(gridPosition, sourceTileModel);
boolean placedSink;
do {
gridPosition = new GridModel.GridPosition(random.nextInt(numRows), random.nextInt(numCols));
sinkTileModel = boardTileModelFactory.createTileModel(BoardTileType.END_PIPE);
placedSink = placeTileModel(gridPosition, sinkTileModel);
} while (!placedSink);
try {
rotateTile(sourceTileModel);
rotateTile(sinkTileModel);
} catch (GridPositionOutOfBoundsException e) {
// Do nothing
// There may be exceptions due to the tile being adjacent
// to an edge and facing towards it, that's why we're rotating it.
}
}