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 java.util.stream.Collectors.toList;
  
  import java.io.ByteArrayOutputStream;
  import java.io.UnsupportedEncodingException;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  /** Util functions for BeamSqlLine related tests. */
  @SuppressWarnings({
    "rawtypes" // TODO(https://github.com/apache/beam/issues/20447)
  })
  class BeamSqlLineTestingUtils {
  
    private static final String QUERY_ARG = "-e";
  
    public static String[] buildArgs(String... strs) {
      List<String> argsList = new ArrayList();
      for (String str : strs) {
        argsList.add(QUERY_ARG);
        argsList.add(str);
      }
      return argsList.toArray(new String[argsList.size()]);
    }
  
    public static List<List<String>> toLines(ByteArrayOutputStream outputStream) {
      List<String> outputLines;
      try {
        outputLines = Arrays.asList(outputStream.toString("UTF-8").split("\n"));
      } catch (UnsupportedEncodingException e) {
        throw new RuntimeException(e);
      }
      return outputLines.stream().map(BeamSqlLineTestingUtils::splitFields).collect(toList());
    }
  
    private static List<String> splitFields(String outputLine) {
      return Arrays.stream(outputLine.split("\\|"))
          .map(field -> field.trim())
          .filter(field -> field.length() != 0)
          .collect(toList());
    }
  }
  