content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.beam.sdk.extensions.sql.jdbc;
  
  import static org.apache.beam.sdk.extensions.sql.impl.JdbcDriver.CONNECT_STRING_PREFIX;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.PrintStream;
  import java.nio.charset.StandardCharsets;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import org.checkerframework.checker.nullness.qual.Nullable;
  import sqlline.SqlLine;
  import sqlline.SqlLine.Status;
  
  /** {@link BeamSqlLine} provides default arguments to SqlLine. */
  public class BeamSqlLine {
  
    private static final String NICKNAME = "BeamSQL";
  
    public static void main(String[] args) throws IOException {
      runSqlLine(args, null, System.out, System.err);
    }
  
    private static String[] checkConnectionArgs(String[] args) {
      List<String> argsList = new ArrayList<>(Arrays.asList(args));
  
      if (!argsList.contains("-nn")) {
        argsList.add("-nn");
        argsList.add(NICKNAME);
      }
  
      if (!argsList.contains("-u")) {
        argsList.add("-u");
        argsList.add(CONNECT_STRING_PREFIX);
      }
  
      return argsList.toArray(new String[argsList.size()]);
    }
  
    /** Nullable InputStream is being handled inside sqlLine.begin. */
    @SuppressWarnings("argument")
    static Status runSqlLine(
        String[] args,
        @Nullable InputStream inputStream,
        @Nullable OutputStream outputStream,
        @Nullable OutputStream errorStream)
        throws IOException {
      String[] modifiedArgs = checkConnectionArgs(args);
      SqlLine sqlLine = new SqlLine();
  
      if (outputStream != null) {
        sqlLine.setOutputStream(new PrintStream(outputStream, false, StandardCharsets.UTF_8.name()));
      }
  
      if (errorStream != null) {
        sqlLine.setErrorStream(new PrintStream(errorStream, false, StandardCharsets.UTF_8.name()));
      }
  
      return sqlLine.begin(modifiedArgs, inputStream, true);
    }
  }
  