Java Duration Format formatDuration(final Duration duration, final boolean wrapInDurationFunction)

Description

format Duration

License

Apache License

Declaration

public static String formatDuration(final Duration duration, final boolean wrapInDurationFunction) 

Method Source Code

//package com.java2s;
/*/*from  ww  w.  ja  va  2 s .  com*/
 * Copyright 2017 Red Hat, Inc. and/or its affiliates.
 *
 * 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
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.time.Duration;

public class Main {
    private static final long SECONDS_IN_A_MINUTE = 60;
    private static final long SECONDS_IN_AN_HOUR = 60 * SECONDS_IN_A_MINUTE;
    private static final long SECONDS_IN_A_DAY = 24 * SECONDS_IN_AN_HOUR;
    private static final long NANOSECONDS_PER_SECOND = 1000000000;

    public static String formatDuration(final Duration duration, final boolean wrapInDurationFunction) {
        if (duration.getSeconds() == 0 && duration.getNano() == 0) {
            if (wrapInDurationFunction) {
                return "duration( \"PT0S\" )";
            } else {
                return "PT0S";
            }
        }
        final long days = duration.getSeconds() / SECONDS_IN_A_DAY;
        final long hours = (duration.getSeconds() % SECONDS_IN_A_DAY) / SECONDS_IN_AN_HOUR;
        final long minutes = (duration.getSeconds() % SECONDS_IN_AN_HOUR) / SECONDS_IN_A_MINUTE;
        final long seconds = duration.getSeconds() % SECONDS_IN_A_MINUTE;

        final StringBuilder sb = new StringBuilder();
        if (wrapInDurationFunction) {
            sb.append("duration( \"");
        }
        if (duration.isNegative()) {
            sb.append("-");
        }
        sb.append("P");
        if (days != 0) {
            appendToDurationString(sb, days, "D");
        }
        if (hours != 0 || minutes != 0 || seconds != 0 || duration.getNano() != 0) {
            sb.append("T");
            if (hours != 0) {
                appendToDurationString(sb, hours, "H");
            }
            if (minutes != 0) {
                appendToDurationString(sb, minutes, "M");
            }
            if (seconds != 0 || duration.getNano() != 0) {
                appendSecondsToDurationString(sb, seconds, duration.getNano());
            }
        }
        if (wrapInDurationFunction) {
            sb.append("\" )");
        }
        return sb.toString();
    }

    private static void appendToDurationString(final StringBuilder sb, final long days,
            final String timeSegmentChar) {
        sb.append(Math.abs(days));
        sb.append(timeSegmentChar);
    }

    private static void appendSecondsToDurationString(final StringBuilder sb, final long seconds,
            final long nanoseconds) {
        if (seconds < 0 && nanoseconds > 0) {
            if (seconds == -1) {
                sb.append("0");
            } else {
                sb.append(Math.abs(seconds + 1));
            }
        } else {
            sb.append(Math.abs(seconds));
        }
        if (nanoseconds > 0) {
            final int pos = sb.length();
            if (seconds < 0) {
                sb.append(2 * NANOSECONDS_PER_SECOND - nanoseconds);
            } else {
                sb.append(nanoseconds + NANOSECONDS_PER_SECOND);
            }
            eliminateTrailingZeros(sb);
            sb.setCharAt(pos, '.');
        }
        sb.append('S');
    }

    private static void eliminateTrailingZeros(final StringBuilder sb) {
        while (sb.charAt(sb.length() - 1) == '0') {
            // eliminates trailing zeros in the nanoseconds
            sb.setLength(sb.length() - 1);
        }
    }
}

Related

1. formatDuration(Duration duration)
2. formatDuration(Duration duration)
3. formatDuration(Duration duration)
4. formatDuration(Duration duration, boolean inProgress)
5. formatDuration(final Duration duration)
6. formatDuration(final int duration)
7. formatDuration(final long milliSeconds)
8. formatDuration(final long seconds)
9. formatDuration(int durationMins)