com.cedarsoftware.util.convert.CalendarConversions Maven / Gradle / Ivy

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Java Utilities
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package com.cedarsoftware.util.convert;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.Timestamp;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.util.Calendar;
import java.util.Date;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;

import com.cedarsoftware.util.CompactLinkedMap;

/**
 * @author Kenny Partlow ([email protected])
 *         

 *         Copyright (c) Cedar Software LLC
 *         


 *         Licensed under the Apache License, Version 2.0 (the "License");
 *         you may not use this file except in compliance with the License.
 *         You may obtain a copy of the License at
 *         


 *         License
 *         


 *         Unless required by applicable law or agreed to in writing, software
 *         distributed under the License is distributed on an "AS IS" BASIS,
 *         WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *         See the License for the specific language governing permissions and
 *         limitations under the License.
 */
final class CalendarConversions {

    private CalendarConversions() {}

    static ZonedDateTime toZonedDateTime(Object from, Converter converter) {
        Calendar calendar = (Calendar)from;
        return calendar.toInstant().atZone(calendar.getTimeZone().toZoneId());
    }

    static Long toLong(Object from, Converter converter) {
        return ((Calendar) from).getTime().getTime();
    }

    static double toDouble(Object from, Converter converter) {
        Calendar calendar = (Calendar) from;
        long epochMillis = calendar.getTime().getTime();
        return epochMillis / 1000.0;
    }
    
    static Date toDate(Object from, Converter converter) {
        return ((Calendar) from).getTime();
    }

    static java.sql.Date toSqlDate(Object from, Converter converter) {
        return new java.sql.Date(((Calendar) from).getTime().getTime());
    }

    static Timestamp toTimestamp(Object from, Converter converter) {
        return new Timestamp(((Calendar) from).getTimeInMillis());
    }

    static AtomicLong toAtomicLong(Object from, Converter converter) {
        return new AtomicLong(((Calendar) from).getTime().getTime());
    }

    static Instant toInstant(Object from, Converter converter) {
        Calendar calendar = (Calendar) from;
        return calendar.toInstant();
    }

    static LocalDateTime toLocalDateTime(Object from, Converter converter) {
        return toZonedDateTime(from, converter).toLocalDateTime();
    }

    static LocalDate toLocalDate(Object from, Converter converter) {
        return toZonedDateTime(from, converter).toLocalDate();
    }

    static LocalTime toLocalTime(Object from, Converter converter) {
        return toZonedDateTime(from, converter).toLocalTime();
    }

    static BigDecimal toBigDecimal(Object from, Converter converter) {
        Calendar cal = (Calendar) from;
        long epochMillis = cal.getTime().getTime();
        return new BigDecimal(epochMillis).divide(BigDecimalConversions.GRAND);
    }

    static BigInteger toBigInteger(Object from, Converter converter) {
        return BigInteger.valueOf(((Calendar) from).getTime().getTime() * 1_000_000L);
    }

    static Calendar clone(Object from, Converter converter) {
        Calendar calendar = (Calendar)from;
        // mutable class, so clone it.
        return (Calendar)calendar.clone();
    }

    static Calendar create(long epochMilli, Converter converter) {
        Calendar cal = Calendar.getInstance(converter.getOptions().getTimeZone());
        cal.clear();
        cal.setTimeInMillis(epochMilli);
        return cal;
    }

    static String toString(Object from, Converter converter) {
        Calendar cal = (Calendar) from;
        return DateConversions.toString(cal.getTime(), converter);
    }

    static OffsetDateTime toOffsetDateTime(Object from, Converter converter) {
        Calendar cal = (Calendar) from;
        OffsetDateTime offsetDateTime = cal.toInstant().atOffset(ZoneOffset.ofTotalSeconds(cal.getTimeZone().getOffset(cal.getTimeInMillis()) / 1000));
        return offsetDateTime;
    }

    static Map toMap(Object from, Converter converter) {
        Calendar cal = (Calendar) from;
        Map target = new CompactLinkedMap<>();
        target.put(MapConversions.DATE, LocalDate.of(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1, cal.get(Calendar.DAY_OF_MONTH)).toString());
        target.put(MapConversions.TIME, LocalTime.of(cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), cal.get(Calendar.SECOND), cal.get(Calendar.MILLISECOND) * 1_000_000).toString());
        target.put(MapConversions.ZONE, cal.getTimeZone().toZoneId().toString());
        target.put(MapConversions.EPOCH_MILLIS, cal.getTimeInMillis());
        return target;
    }
}