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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements. See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache license, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License. You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the license for the specific language governing permissions and
    15   * limitations under the license.
    16   */
    17  package org.apache.logging.log4j.core.jackson;
    18
    19  import java.io.IOException;
    20  import java.util.List;
    21
    22  import org.apache.logging.log4j.spi.MutableThreadContextStack;
    23
    24  import com.fasterxml.jackson.core.JsonParser;
    25  import com.fasterxml.jackson.core.JsonProcessingException;
    26  import com.fasterxml.jackson.core.type.TypeReference;
    27  import com.fasterxml.jackson.databind.DeserializationContext;
    28  import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
    29
    30  /**
    31   * <p>
    32   * <em>Consider this class private.</em>
    33   * </p>
    34   */
    35  final class MutableThreadContextStackDeserializer extends StdDeserializer<MutableThreadContextStack> {
    36
    37      private static final long serialVersionUID = 1L;
    38
    39      MutableThreadContextStackDeserializer() {
    40          super(MutableThreadContextStack.class);
    41      }
    42
    43      @Override
    44      public MutableThreadContextStack deserialize(final JsonParser jp, final DeserializationContext ctxt) throws IOException,
    45              JsonProcessingException {
    46          final List<String> list = jp.readValueAs(new TypeReference<List<String>>() {
    47              // empty
    48          });
    49          return new MutableThreadContextStack(list);
    50      }
    51  }