Java TimeUnit Convert convert(double t, TimeUnit sourceUnit, TimeUnit destinationUnit)

Description

convert

License

Apache License

Declaration

public static double convert(double t, TimeUnit sourceUnit, TimeUnit destinationUnit) 

Method Source Code

//package com.java2s;
/**/*from  www.j  a  v  a2  s  . c o  m*/
 * Copyright 2017 Pivotal Software, Inc.
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.
 */

import java.util.concurrent.TimeUnit;

public class Main {
    private static final long C0 = 1L;
    private static final long C1 = C0 * 1000L;
    private static final long C2 = C1 * 1000L;
    private static final long C3 = C2 * 1000L;
    private static final long C4 = C3 * 60L;
    private static final long C5 = C4 * 60L;
    private static final long C6 = C5 * 24L;

    public static double convert(double t, TimeUnit sourceUnit, TimeUnit destinationUnit) {
        switch (sourceUnit) {
        case NANOSECONDS:
            return nanosToUnit(t, destinationUnit);
        case MICROSECONDS:
            return microsToUnit(t, destinationUnit);
        case MILLISECONDS:
            return millisToUnit(t, destinationUnit);
        case SECONDS:
            return secondsToUnit(t, destinationUnit);
        case MINUTES:
            return minutesToUnit(t, destinationUnit);
        case HOURS:
            return hoursToUnit(t, destinationUnit);
        case DAYS:
        default:
            return daysToUnit(t, destinationUnit);
        }
    }

    public static double nanosToUnit(double nanos, TimeUnit destinationUnit) {
        switch (destinationUnit) {
        case NANOSECONDS:
        default:
            return nanos;
        case MICROSECONDS:
            return nanos / (C1 / C0);
        case MILLISECONDS:
            return nanos / (C2 / C0);
        case SECONDS:
            return nanos / (C3 / C0);
        case MINUTES:
            return nanos / (C4 / C0);
        case HOURS:
            return nanos / (C5 / C0);
        case DAYS:
            return nanos / (C6 / C0);
        }
    }

    public static double microsToUnit(double micros, TimeUnit destinationUnit) {
        switch (destinationUnit) {
        case NANOSECONDS:
            return micros * (C1 / C0);
        case MICROSECONDS:
        default:
            return micros;
        case MILLISECONDS:
            return micros / (C2 / C1);
        case SECONDS:
            return micros / (C3 / C1);
        case MINUTES:
            return micros / (C4 / C1);
        case HOURS:
            return micros / (C5 / C1);
        case DAYS:
            return micros / (C6 / C1);
        }
    }

    public static double millisToUnit(double millis, TimeUnit destinationUnit) {
        switch (destinationUnit) {
        case NANOSECONDS:
            return millis * (C2 / C0);
        case MICROSECONDS:
            return millis * (C2 / C1);
        case MILLISECONDS:
        default:
            return millis;
        case SECONDS:
            return millis / (C3 / C2);
        case MINUTES:
            return millis / (C4 / C2);
        case HOURS:
            return millis / (C5 / C2);
        case DAYS:
            return millis / (C6 / C2);
        }
    }

    public static double secondsToUnit(double seconds, TimeUnit destinationUnit) {
        switch (destinationUnit) {
        case NANOSECONDS:
            return seconds * (C3 / C0);
        case MICROSECONDS:
            return seconds * (C3 / C1);
        case MILLISECONDS:
            return seconds * (C3 / C2);
        case SECONDS:
        default:
            return seconds;
        case MINUTES:
            return seconds / (C4 / C3);
        case HOURS:
            return seconds / (C5 / C3);
        case DAYS:
            return seconds / (C6 / C3);
        }
    }

    public static double minutesToUnit(double minutes, TimeUnit destinationUnit) {
        switch (destinationUnit) {
        case NANOSECONDS:
            return minutes * (C4 / C0);
        case MICROSECONDS:
            return minutes * (C4 / C1);
        case MILLISECONDS:
            return minutes * (C4 / C2);
        case SECONDS:
            return minutes * (C4 / C3);
        case MINUTES:
        default:
            return minutes;
        case HOURS:
            return minutes / (C5 / C4);
        case DAYS:
            return minutes / (C6 / C4);
        }
    }

    public static double hoursToUnit(double hours, TimeUnit destinationUnit) {
        switch (destinationUnit) {
        case NANOSECONDS:
            return hours * (C5 / C0);
        case MICROSECONDS:
            return hours * (C5 / C1);
        case MILLISECONDS:
            return hours * (C5 / C2);
        case SECONDS:
            return hours * (C5 / C3);
        case MINUTES:
            return hours * (C5 / C4);
        case HOURS:
        default:
            return hours;
        case DAYS:
            return hours / (C6 / C5);
        }
    }

    public static double daysToUnit(double days, TimeUnit destinationUnit) {
        switch (destinationUnit) {
        case NANOSECONDS:
            return days * (C6 / C0);
        case MICROSECONDS:
            return days * (C6 / C1);
        case MILLISECONDS:
            return days * (C6 / C2);
        case SECONDS:
            return days * (C6 / C3);
        case MINUTES:
            return days * (C6 / C4);
        case HOURS:
            return days * (C6 / C5);
        case DAYS:
        default:
            return days;
        }
    }
}

Related

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