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.tools.consumer.group;
  
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.fasterxml.jackson.databind.ObjectReader;
  import com.fasterxml.jackson.databind.ObjectWriter;
  import com.fasterxml.jackson.dataformat.csv.CsvMapper;
  import com.fasterxml.jackson.dataformat.csv.CsvSchema;
  
  public class CsvUtils {
      private static final CsvMapper MAPPER = new CsvMapper();
  
      static ObjectReader readerFor(Class<?> clazz) {
          return MAPPER.readerFor(clazz).with(getSchema(clazz));
      }
  
      static ObjectWriter writerFor(Class<?> clazz) {
          return MAPPER.writerFor(clazz).with(getSchema(clazz));
      }
  
      private static CsvSchema getSchema(Class<?> clazz) {
          String[] fields;
          if (CsvRecordWithGroup.class == clazz)
              fields = CsvRecordWithGroup.FIELDS;
          else if (CsvRecordNoGroup.class == clazz)
              fields = CsvRecordNoGroup.FIELDS;
          else
              throw new IllegalStateException("Unhandled class " + clazz);
  
          return MAPPER.schemaFor(clazz).sortedBy(fields);
      }
  
      public static class CsvRecordWithGroup {
          public static final String[] FIELDS = new String[] {"group", "topic", "partition", "offset"};
  
          @JsonProperty
          private String group;
  
          @JsonProperty
          private String topic;
  
          @JsonProperty
          private int partition;
  
          @JsonProperty
          private long offset;
  
          /**
           * Required for jackson.
           */
          public CsvRecordWithGroup() {
          }
  
          public CsvRecordWithGroup(String group, String topic, int partition, long offset) {
              this.group = group;
              this.topic = topic;
              this.partition = partition;
              this.offset = offset;
          }
  
          public void setGroup(String group) {
              this.group = group;
          }
  
          public String getGroup() {
              return group;
          }
  
          public String getTopic() {
              return topic;
          }
  
          public void setTopic(String topic) {
              this.topic = topic;
          }
  
          public int getPartition() {
              return partition;
          }
  
          public void setPartition(int partition) {
              this.partition = partition;
          }
  
          public long getOffset() {
              return offset;
          }
  
          public void setOffset(long offset) {
              this.offset = offset;
          }
      }
  
      public static class CsvRecordNoGroup {
          public static final String[] FIELDS = new String[]{"topic", "partition", "offset"};
  
          @JsonProperty
          private String topic;
  
          @JsonProperty
          private int partition;
  
          @JsonProperty
          private long offset;
  
          /**
           * Required for jackson.
           */
          public CsvRecordNoGroup() {
          }
  
          public CsvRecordNoGroup(String topic, int partition, long offset) {
              this.topic = topic;
              this.partition = partition;
              this.offset = offset;
          }
  
          public String getTopic() {
              return topic;
          }
  
          public void setTopic(String topic) {
              this.topic = topic;
          }
  
          public int getPartition() {
              return partition;
          }
  
          public void setPartition(int partition) {
              this.partition = partition;
          }
  
          public long getOffset() {
              return offset;
          }
  
          public void setOffset(long offset) {
              this.offset = offset;
          }
      }
  }
  