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