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.List;
021import java.util.Map;
022
023import org.apache.logging.log4j.core.impl.ContextDataFactory;
024import org.apache.logging.log4j.util.StringMap;
025
026import com.fasterxml.jackson.core.JsonParser;
027import com.fasterxml.jackson.core.JsonProcessingException;
028import com.fasterxml.jackson.core.type.TypeReference;
029import com.fasterxml.jackson.databind.DeserializationContext;
030import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
031
032/**
033 * <p>
034 * <em>Consider this class private.</em>
035 * </p>
036 */
037public class ContextDataAsEntryListDeserializer extends StdDeserializer<StringMap> {
038
039    private static final long serialVersionUID = 1L;
040
041    ContextDataAsEntryListDeserializer() {
042        super(Map.class);
043    }
044
045    @Override
046    public StringMap deserialize(final JsonParser jp, final DeserializationContext ctxt) throws IOException,
047            JsonProcessingException {
048        final List<MapEntry> list = jp.readValueAs(new TypeReference<List<MapEntry>>() {
049            // empty
050        });
051        final StringMap contextData = new ContextDataFactory().createContextData();
052        for (final MapEntry mapEntry : list) {
053            contextData.putValue(mapEntry.getKey(), mapEntry.getValue());
054        }
055        return contextData;
056    }
057}