import com.google.auth.Credentials;
import com.google.auth.oauth2.ServiceAccountCredentials;
import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.Table;
import com.google.cloud.bigquery.TableId;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class Main {

  private static final String CREDENTIALS_PATH = "/Users/sergiorodriguez/key.json";
  private static final String PROJECT_ID = "streamsets-engineering";
  private static final String DATASET_NAME = "sergio_dataset";
  // Will throw NullPointerException if empty, and specific error if not empty
  private static final String TABLE_NAME = "";

  private Credentials getCredentials(String path) throws IOException {
    File credentialsFile = new File(path);
    return ServiceAccountCredentials.fromStream(new FileInputStream(credentialsFile));
  }

  private Main() throws IOException {
    Credentials credentials = getCredentials(CREDENTIALS_PATH);
    BigQueryOptions options = BigQueryOptions.newBuilder()
                                             .setCredentials(credentials)
                                             .setProjectId(PROJECT_ID)
                                             .build();
    BigQuery bigQuery = options.getService();
    TableId tableId = TableId.of(DATASET_NAME, TABLE_NAME);
    Table table = bigQuery.getTable(tableId);
    System.out.println(table);
  }

  public static void main(String[] args) throws IOException {
    new Main();
  }
}