001/*;
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache license, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the license for the specific language governing permissions and
015 * limitations under the license.
016 */
017package org.apache.logging.log4j.core.jackson;
018
019import java.io.IOException;
020import java.util.HashMap;
021import java.util.List;
022import java.util.Map;
023
024import com.fasterxml.jackson.core.JsonParser;
025import com.fasterxml.jackson.core.JsonProcessingException;
026import com.fasterxml.jackson.core.type.TypeReference;
027import com.fasterxml.jackson.databind.DeserializationContext;
028import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
029
030/**
031 * <p>
032 * <em>Consider this class private.</em>
033 * </p>
034 */
035public class ListOfMapEntryDeserializer extends StdDeserializer<Map<String, String>> {
036
037    private static final long serialVersionUID = 1L;
038
039    ListOfMapEntryDeserializer() {
040        super(Map.class);
041    }
042
043    @Override
044    public Map<String, String> deserialize(final JsonParser jp, final DeserializationContext ctxt) throws IOException,
045            JsonProcessingException {
046        final List<MapEntry> list = jp.readValueAs(new TypeReference<List<MapEntry>>() {
047            // empty
048        });
049        final HashMap<String, String> map = new HashMap<String, String>(list.size());
050        for (final MapEntry mapEntry : list) {
051            map.put(mapEntry.getKey(), mapEntry.getValue());
052        }
053        return map;
054    }
055}