/*
    * 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.logging.log4j.core.jackson;
  
  import java.io.IOException;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.logging.log4j.core.impl.ContextDataFactory;
  import org.apache.logging.log4j.util.StringMap;
  
  import com.fasterxml.jackson.core.JsonParser;
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.core.type.TypeReference;
  import com.fasterxml.jackson.databind.DeserializationContext;
  import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
  
  /**
   * <p>
   * <em>Consider this class private.</em>
   * </p>
   */
  public class ContextDataAsEntryListDeserializer extends StdDeserializer<StringMap> {
  
      private static final long serialVersionUID = 1L;
  
      ContextDataAsEntryListDeserializer() {
          super(Map.class);
      }
  
      @Override
      public StringMap deserialize(final JsonParser jp, final DeserializationContext ctxt) throws IOException,
              JsonProcessingException {
          final List<MapEntry> list = jp.readValueAs(new TypeReference<List<MapEntry>>() {
              // empty
          });
          final StringMap contextData = new ContextDataFactory().createContextData();
          for (final MapEntry mapEntry : list) {
              contextData.putValue(mapEntry.getKey(), mapEntry.getValue());
          }
          return contextData;
      }
  }