com.cedarsoftware.util.convert.DoubleConversions Maven / Gradle / Ivy
package com.cedarsoftware.util.convert;
import java.sql.Timestamp;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZonedDateTime;
import java.util.Calendar;
import java.util.Date;
/**
* @author John DeRegnaucourt ([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 DoubleConversions {
private DoubleConversions() { }
static Instant toInstant(Object from, Converter converter) {
double d = (Double) from;
long seconds = (long) d;
// Calculate nanoseconds by taking the fractional part of the double and multiplying by 1_000_000_000,
// rounding to the nearest long to maintain precision.
long nanos = Math.round((d - seconds) * 1_000_000_000);
return Instant.ofEpochSecond(seconds, nanos);
}
static Date toDate(Object from, Converter converter) {
double d = (Double) from;
return new Date((long)(d * 1000));
}
static Date toSqlDate(Object from, Converter converter) {
double d = (Double) from;
return new java.sql.Date((long)(d * 1000));
}
static Calendar toCalendar(Object from, Converter converter) {
double seconds = (double) from;
long epochMillis = (long)(seconds * 1000);
Calendar calendar = Calendar.getInstance(converter.getOptions().getTimeZone());
calendar.clear();
calendar.setTimeInMillis(epochMillis);
return calendar;
}
static LocalTime toLocalTime(Object from, Converter converter) {
double seconds = (double) from;
double nanos = seconds * 1_000_000_000.0;
try {
return LocalTime.ofNanoOfDay((long)nanos);
}
catch (Exception e) {
throw new IllegalArgumentException("Input value [" + seconds + "] for conversion to LocalTime must be >= 0 && <= 86399.999999999", e);
}
}
static LocalDate toLocalDate(Object from, Converter converter) {
return toZonedDateTime(from, converter).toLocalDate();
}
static LocalDateTime toLocalDateTime(Object from, Converter converter) {
return toZonedDateTime(from, converter).toLocalDateTime();
}
static ZonedDateTime toZonedDateTime(Object from, Converter converter) {
return toInstant(from, converter).atZone(converter.getOptions().getZoneId());
}
static OffsetDateTime toOffsetDateTime(Object from, Converter converter) {
return toInstant(from, converter).atZone(converter.getOptions().getZoneId()).toOffsetDateTime();
}
static Timestamp toTimestamp(Object from, Converter converter) {
return Timestamp.from(toInstant(from, converter));
}
static Duration toDuration(Object from, Converter converter) {
double d = (Double) from;
// Separate whole seconds and nanoseconds
long seconds = (long) d;
long nanoAdjustment = (long) ((d - seconds) * 1_000_000_000L);
return Duration.ofSeconds(seconds, nanoAdjustment);
}
}