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.calcite.adapter.redis;
  
  import org.apache.commons.lang3.StringUtils;
  
  import com.fasterxml.jackson.core.JsonParser;
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.ObjectMapper;
  
  import java.util.ArrayList;
  import java.util.LinkedHashMap;
  import java.util.List;
  
  import redis.clients.jedis.Jedis;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * The class with RedisDataProcess.
   */
  public class RedisDataProcess {
    final String tableName;
    final String dataFormat;
    final String keyDelimiter;
    final RedisDataType dataType;
    final RedisDataFormat redisDataFormat;
    final List<LinkedHashMap<String, Object>> fields;
    private final Jedis jedis;
    private final ObjectMapper objectMapper = new ObjectMapper();
  
    public RedisDataProcess(Jedis jedis, RedisTableFieldInfo tableFieldInfo) {
      this.jedis = jedis;
      String type = jedis.type(tableFieldInfo.getTableName());
      fields = tableFieldInfo.getFields();
      dataFormat = tableFieldInfo.getDataFormat();
      tableName = tableFieldInfo.getTableName();
      keyDelimiter = tableFieldInfo.getKeyDelimiter();
      dataType = requireNonNull(RedisDataType.fromTypeName(type));
      redisDataFormat =
          requireNonNull(
              RedisDataFormat.fromTypeName(tableFieldInfo.getDataFormat()));
      objectMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true)
          .configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true)
          .configure(JsonParser.Feature.ALLOW_COMMENTS, true);
    }
  
    public List<Object[]> read() {
      switch (dataType) {
      case STRING:
        return parse(jedis.keys(tableName));
      case LIST:
        return parse(jedis.lrange(tableName, 0, -1));
      case SET:
        return parse(jedis.smembers(tableName));
      case SORTED_SET:
        return parse(jedis.zrange(tableName, 0, -1));
      case HASH:
        return parse(jedis.hvals(tableName));
      default:
        return new ArrayList<>();
      }
    }
  
    private Object[] parseJson(String value) {
      assert StringUtils.isNotEmpty(value);
      Object[] arr = new Object[fields.size()];
      try {
        JsonNode jsonNode = objectMapper.readTree(value);
        Object obj;
        for (int i = 0; i < arr.length; i++) {
          obj = fields.get(i).get("mapping");
          if (obj == null) {
            arr[i] = "";
          } else {
            arr[i] = jsonNode.findValue(fields.get(i).get("mapping").toString());
          }
        }
      } catch (Exception e) {
        throw new RuntimeException("Parsing json failed: ", e);
      }
      return arr;
    }
  
    private Object[] parseCsv(String value) {
      assert StringUtils.isNotEmpty(value);
      String[] values = value.split(keyDelimiter);
      Object[] arr = new Object[fields.size()];
      assert values.length == arr.length;
      for (int i = 0; i < arr.length; i++) {
        arr[i] = values[i] == null ? "" : values[i];
      }
      return arr;
    }
  
    List<Object[]> parse(Iterable<String> keys) {
      List<Object[]> objects = new ArrayList<>();
      for (String key : keys) {
        if (dataType == RedisDataType.STRING) {
          key = jedis.get(key);
        }
        switch (redisDataFormat) {
        case RAW:
          objects.add(new Object[]{key});
          break;
        case JSON:
          objects.add(parseJson(key));
          break;
        case CSV:
          objects.add(parseCsv(key));
          break;
        default:
          break;
        }
      }
      return objects;
    }
  
    public List<Object[]> parse(List<String> keys) {
      List<Object[]> objects = new ArrayList<>();
      for (String key : keys) {
        if (dataType == RedisDataType.STRING) {
          key = jedis.get(key);
        }
        switch (redisDataFormat) {
        case RAW:
          objects.add(new Object[]{key});
          break;
        case JSON:
          objects.add(parseJson(key));
          break;
        case CSV:
          objects.add(parseCsv(key));
          break;
        default:
          break;
        }
      }
      return objects;
    }
  }
  