if (tileMatrixDao.isTableExists()) { ForeignCollection<TileMatrix> tileMatrixCollection = contents .getTileMatrix(); if (!tileMatrixCollection.isEmpty()) { tileMatrixDao.delete(tileMatrixCollection);
if (tileMatrixDao.isTableExists()) { ForeignCollection<TileMatrix> tileMatrixCollection = contents .getTileMatrix(); if (!tileMatrixCollection.isEmpty()) { tileMatrixDao.delete(tileMatrixCollection);