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 org.apache.logging.log4j.core.time.Instant;
020import org.apache.logging.log4j.core.time.MutableInstant;
021import org.apache.logging.log4j.status.StatusLogger;
022import org.apache.logging.log4j.util.Strings;
023
024import javax.persistence.AttributeConverter;
025import javax.persistence.Converter;
026
027/**
028 * A JPA 2.1 attribute converter for {@link Instant}s in {@link org.apache.logging.log4j.core.LogEvent}s. This
029 * converter is capable of converting both to and from {@link String}s.
030 */
031@Converter(autoApply = false)
032public class InstantAttributeConverter implements AttributeConverter<Instant, String> {
033    private static final StatusLogger LOGGER = StatusLogger.getLogger();
034
035    @Override
036    public String convertToDatabaseColumn(final Instant instant) {
037        if (instant == null) {
038            return null;
039        }
040        return instant.getEpochSecond() + "," + instant.getNanoOfSecond();
041    }
042
043    @Override
044    public Instant convertToEntityAttribute(final String s) {
045        if (Strings.isEmpty(s)) {
046            return null;
047        }
048
049        final int pos = s.indexOf(",");
050        final long epochSecond = Long.parseLong(s.substring(0, pos));
051        final int nanos = Integer.parseInt(s.substring(pos + 1, s.length()));
052
053        final MutableInstant result = new MutableInstant();
054        result.initFromEpochSecond(epochSecond, nanos);
055        return result;
056    }
057}