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 org.apache.kafka.server.util.json.JsonValue;
  
  import com.fasterxml.jackson.core.JsonParseException;
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.node.MissingNode;
  
  import java.io.IOException;
  import java.util.Optional;
  
  /**
   * Provides methods for parsing JSON with Jackson and encoding to JSON with a simple and naive custom implementation.
   */
  public final class Json {
      private static final ObjectMapper MAPPER = new ObjectMapper();
  
      /**
       * Parse a JSON string into a JsonValue if possible. `Empty` is returned if `input` is not valid JSON.
       */
      public static Optional<JsonValue> parseFull(String input) {
          try {
              return Optional.of(tryParseFull(input));
          } catch (JsonProcessingException e) {
              return Optional.empty();
          }
      }
  
      /**
       * Parse a JSON string into a generic type T, or throw JsonProcessingException in the case of
       * exception.
       */
      public static <T> T parseStringAs(String input, Class<T> clazz) throws JsonProcessingException {
          return MAPPER.readValue(input, clazz);
      }
  
      /**
       * Parse a JSON byte array into a JsonValue if possible. `Empty` is returned if `input` is not valid JSON.
       */
      public static Optional<JsonValue> parseBytes(byte[] input) throws IOException {
          try {
              return Optional.ofNullable(MAPPER.readTree(input)).map(JsonValue::apply);
          } catch (JsonProcessingException e) {
              return Optional.empty();
          }
      }
  
      public static JsonValue tryParseBytes(byte[] input) throws IOException {
          return JsonValue.apply(MAPPER.readTree(input));
      }
  
      /**
       * Parse a JSON byte array into a generic type T, or throws a JsonProcessingException in the case of exception.
       */
      public static <T> T parseBytesAs(byte[] input, Class<T> clazz) throws IOException {
          return MAPPER.readValue(input, clazz);
      }
  
      /**
       * Parse a JSON string into a JsonValue if possible.
       * @param input a JSON string to parse
       * @return the actual json value.
       * @throws JsonProcessingException if failed to parse
       */
      public static JsonValue tryParseFull(String input) throws JsonProcessingException {
          if (input == null || input.isEmpty()) {
              throw new JsonParseException(MissingNode.getInstance().traverse(), "The input string shouldn't be empty");
          } else {
              return JsonValue.apply(MAPPER.readTree(input));
          }
      }
  
      /**
       * Encode an object into a JSON string. This method accepts any type supported by Jackson's ObjectMapper in
       * the default configuration. That is, Java collections are supported, but Scala collections are not (to avoid
       * a jackson-scala dependency).
       */
      public static String encodeAsString(Object obj) throws JsonProcessingException {
          return MAPPER.writeValueAsString(obj);
      }
  
      /**
       * Encode an object into a JSON value in bytes. This method accepts any type supported by Jackson's ObjectMapper in
       * the default configuration. That is, Java collections are supported, but Scala collections are not (to avoid
       * a jackson-scala dependency).
       */
      public static byte[] encodeAsBytes(Object obj) throws JsonProcessingException {
          return MAPPER.writeValueAsBytes(obj);
      }
  }
  