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.appender.db.jpa.converter;
018
019import javax.persistence.AttributeConverter;
020import javax.persistence.Converter;
021
022import org.apache.logging.log4j.Marker;
023import org.apache.logging.log4j.MarkerManager;
024import org.apache.logging.log4j.core.helpers.Strings;
025
026/**
027 * A JPA 2.1 attribute converter for {@link Marker}s in {@link org.apache.logging.log4j.core.LogEvent}s. This
028 * converter is capable of converting both to and from {@link String}s.
029 */
030@Converter(autoApply = false)
031public class MarkerAttributeConverter implements AttributeConverter<Marker, String> {
032    @Override
033    public String convertToDatabaseColumn(final Marker marker) {
034        if (marker == null) {
035            return null;
036        }
037
038        final StringBuilder builder = new StringBuilder(marker.getName());
039        Marker parent = marker.getParent();
040        int levels = 0;
041        boolean hasParent = false;
042        while (parent != null) {
043            levels++;
044            hasParent = true;
045            builder.append("[ ").append(parent.getName());
046            parent = parent.getParent();
047        }
048        for (int i = 0; i < levels; i++) {
049            builder.append(" ]");
050        }
051        if (hasParent) {
052            builder.append(" ]");
053        }
054        return builder.toString();
055    }
056
057    @Override
058    public Marker convertToEntityAttribute(final String s) {
059        if (Strings.isEmpty(s)) {
060            return null;
061        }
062
063        final int bracket = s.indexOf("[");
064
065        return bracket < 1 ? MarkerManager.getMarker(s) : MarkerManager.getMarker(s.substring(0, bracket));
066    }
067}