/*
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2023, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  
  package ch.qos.logback.classic.jsonTest;
  
  import com.fasterxml.jackson.core.JacksonException;
  import com.fasterxml.jackson.core.JsonParser;
  import com.fasterxml.jackson.databind.DeserializationContext;
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
  import org.slf4j.event.KeyValuePair;
  
  import java.io.IOException;
  import java.util.Iterator;
  import java.util.Map;
  
  public class KeyValuePairDeserializer  extends StdDeserializer<KeyValuePair>  {
      public  KeyValuePairDeserializer() {
          this(null);
      }
  
  
      public  KeyValuePairDeserializer(Class<?> vc) {
          super(vc);
      }
  
  
      @Override
      public KeyValuePair deserialize(JsonParser jsonParser, DeserializationContext deserializationContext)
              throws IOException, JacksonException {
  
          JsonNode node = jsonParser.getCodec().readTree(jsonParser);
  
          if(node.isObject()) {
              Iterator<Map.Entry<String, JsonNode>> it = node.fields();
              if(it.hasNext()) {
                  Map.Entry<String, JsonNode> entry = it.next();
                  String key = entry.getKey();
                  String value = entry.getValue().asText();
                  KeyValuePair kvp = new KeyValuePair(key, value);
                  return kvp;
              }
          }
  
          return null;
      }
  }