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.kafka.server.util;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Stream;
  
  public class Csv {
  
      /**
       * This method gets comma separated values which contains key,value pairs and returns a map of
       * key value pairs. the format of allCSVal is key1:val1, key2:val2 ....
       * Also supports strings with multiple ":" such as IpV6 addresses, taking the last occurrence
       * of the ":" in the pair as the split, eg a:b:c:val1, d:e:f:val2 => a:b:c -> val1, d:e:f -> val2
       */
      public static Map<String, String> parseCsvMap(String str) {
          Map<String, String> map = new HashMap<>();
          if (str == null || str.isEmpty())
              return map;
          String[] keyVals = str.split("\\s*,\\s*");
          for (String s : keyVals) {
              int lio = s.lastIndexOf(":");
              map.put(s.substring(0, lio).trim(), s.substring(lio + 1).trim());
          }
          return map;
      }
  
      /**
       * Parse a comma separated string into a sequence of strings.
       * Whitespace surrounding the comma will be removed.
       */
      public static List<String> parseCsvList(String csvList) {
          if (csvList == null || csvList.isEmpty()) {
              return List.of();
          } else {
              return Stream.of(csvList.split("\\s*,\\s*")).filter(v -> !v.isEmpty()).toList();
          }
      }
  }
  