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.Level;
023    import org.apache.logging.log4j.util.Strings;
024    
025    /**
026     * A JPA 2.1 attribute converter for {@link org.apache.logging.log4j.Level}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 LevelAttributeConverter implements AttributeConverter<Level, String> {
031        @Override
032        public String convertToDatabaseColumn(final Level level) {
033            if (level == null) {
034                return null;
035            }
036            return level.name();
037        }
038    
039        @Override
040        public Level convertToEntityAttribute(final String s) {
041            if (Strings.isEmpty(s)) {
042                return null;
043            }
044    
045            return Level.toLevel(s, null);
046        }
047    }