    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.message.Message;
    023    import org.apache.logging.log4j.status.StatusLogger;
    024    import org.apache.logging.log4j.util.Strings;
    025
    026    /**
    027     * A JPA 2.1 attribute converter for {@link Message}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)
    031    public class MessageAttributeConverter implements AttributeConverter<Message, String> {
    032        private static final StatusLogger LOGGER = StatusLogger.getLogger();
    033
    034        @Override
    035        public String convertToDatabaseColumn(final Message message) {
    036            if (message == null) {
    037                return null;
    038            }
    039
    040            return message.getFormattedMessage();
    041        }
    042
    043        @Override
    044        public Message convertToEntityAttribute(final String s) {
    045            if (Strings.isEmpty(s)) {
    046                return null;
    047            }
    048
    049            return LOGGER.getMessageFactory().newMessage(s);
    050        }
    051    }