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.message.Message;
023import org.apache.logging.log4j.status.StatusLogger;
024import 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)
031public 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}