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The Apache Log4j Implementation
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/*
 * 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 org.apache.logging.log4j.Marker;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlElementWrapper;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;

/**
 * Jackson mix-in for {@link Marker}.
 * 
 * If we want to deal with more than one {@link Marker} implementation then recode these annotations to include metadata.
 * 
 * 
 * Consider this class private.
 * 
 * 
 * Example XML:
 * 
 * <Marker name="Marker1">
    <Parents>
        <Marker name="ParentMarker1">
            <Parents>
                <Marker name="GrandMotherMarker"/>
                <Marker name="GrandFatherMarker"/>
            </Parents>
        </Marker>
        <Marker name="ParentMarker2"/>
    </Parents>
</Marker>
 * 
 * 
 * @see Marker
 */
// Alternate for multiple Marker implementation.
// @JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "@class")
@JsonDeserialize(as = org.apache.logging.log4j.MarkerManager.Log4jMarker.class)
abstract class MarkerMixIn implements Marker {
    private static final long serialVersionUID = 1L;

    @JsonCreator
    MarkerMixIn(@JsonProperty("name") final String name) {
        // empty
    }

    @Override
    @JsonProperty("name")
    @JacksonXmlProperty(isAttribute = true)
    public abstract String getName();

    @Override
    @JsonProperty(JsonConstants.ELT_PARENTS)
    @JacksonXmlElementWrapper(namespace = XmlConstants.XML_NAMESPACE, localName = XmlConstants.ELT_PARENTS)
    @JacksonXmlProperty(namespace = XmlConstants.XML_NAMESPACE, localName = XmlConstants.ELT_MARKER)
    public abstract Marker[] getParents();

}