Java tutorial
/** * The contents of this file are subject to the license and copyright * detailed in the LICENSE file at the root of the source * tree and available online at * * https://github.com/keeps/roda */ package org.roda.wui.common.client.tools; import java.util.Date; import com.google.gwt.core.client.GWT; import com.google.gwt.i18n.client.DateTimeFormat; import com.google.gwt.i18n.client.NumberFormat; import config.i18n.client.ClientMessages; public class Humanize { private static ClientMessages messages = (ClientMessages) GWT.create(ClientMessages.class); public static final long ONE_SECOND = 1000; public static final long SECONDS = 60; public static final long ONE_MINUTE = ONE_SECOND * 60; public static final long MINUTES = 60; public static final long ONE_HOUR = ONE_MINUTE * 60; public static final long HOURS = 24; public static final long ONE_DAY = ONE_HOUR * 24; public static final String BYTES = "B"; public static final String KILOBYTES = "KB"; public static final String MEGABYTES = "MB"; public static final String GIGABYTES = "GB"; public static final String TERABYTES = "TB"; public static final String PETABYTES = "PB"; public static final String[] UNITS = new String[] { BYTES, KILOBYTES, MEGABYTES, GIGABYTES, TERABYTES, PETABYTES }; public static final double BYTES_IN_KILOBYTES = 1024L; public static final double BYTES_IN_MEGABYTES = 1048576L; public static final double BYTES_IN_GIGABYTES = 1073741824L; public static final double BYTES_IN_TERABYTES = 1099511627776L; public static final double BYTES_IN_PETABYTES = 1125899906842624L; public static final double[] BYTES_IN_UNITS = { 1, BYTES_IN_KILOBYTES, BYTES_IN_MEGABYTES, BYTES_IN_GIGABYTES, BYTES_IN_TERABYTES, BYTES_IN_PETABYTES }; protected static final NumberFormat SMALL_NUMBER_FORMAT = NumberFormat.getFormat("0.#"); protected static final NumberFormat NUMBER_FORMAT = NumberFormat.getFormat("#"); public static final DateTimeFormat DATE_FORMAT = DateTimeFormat.getFormat("yyyy-MM-dd"); public static final DateTimeFormat DATE_TIME_FORMAT = DateTimeFormat.getFormat("yyyy-MM-dd HH:mm:ss"); public static final DateTimeFormat DATE_TIME_MS_FORMAT = DateTimeFormat.getFormat("yyyy-MM-dd HH:mm:ss.SSS"); private Humanize() { // do nothing } public static Long parseFileSize(String size, String unit) { if (size != null && !size.isEmpty()) { String trimmedSize = size.trim(); if (unit.equals(PETABYTES)) { return Math.round(Double.parseDouble(trimmedSize) * BYTES_IN_PETABYTES); } else if (unit.equals(TERABYTES)) { return Math.round(Double.parseDouble(trimmedSize) * BYTES_IN_TERABYTES); } else if (unit.equals(GIGABYTES)) { return Math.round(Double.parseDouble(trimmedSize) * BYTES_IN_GIGABYTES); } else if (unit.equals(MEGABYTES)) { return Math.round(Double.parseDouble(trimmedSize) * BYTES_IN_MEGABYTES); } else if (unit.equals(KILOBYTES)) { return Math.round(Double.parseDouble(trimmedSize) * BYTES_IN_KILOBYTES); } else if (unit.equals(BYTES)) { return Long.parseLong(trimmedSize); } else { throw new IllegalArgumentException(trimmedSize); } } return null; } public static String readableFileSize(long size) { if (size <= 0) { return "0 B"; } int digitGroups = (int) (Math.log10(size) / Math.log10(1024)); return NumberFormat.getFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + UNITS[digitGroups]; } public static String getDatesText(Date dateInitial, Date dateFinal, boolean extendedDate) { if (dateInitial == null && dateFinal == null) { return extendedDate ? messages.titleDatesEmpty() : messages.simpleDatesEmpty(); } else if (dateInitial != null && dateFinal == null) { return extendedDate ? messages.titleDatesNoFinal(dateInitial) : messages.simpleDatesNoFinal(dateInitial); } else if (dateInitial == null) { return extendedDate ? messages.titleDatesNoInitial(dateFinal) : messages.simpleDatesNoInitial(dateFinal); } else { return extendedDate ? messages.titleDates(dateInitial, dateFinal) : messages.simpleDates(dateInitial, dateFinal); } } public enum DHMSFormat { LONG, SHORT; } public static String durationInDHMS(Date start, Date end, DHMSFormat format) { Date endDate = end == null ? new Date() : end; long duration = endDate.getTime() - start.getTime(); return DHMSFormat.LONG.equals(format) ? durationMillisToLongDHMS(duration) : durationMillisToShortDHMS(duration); } /** * converts time (in milliseconds) to human-readable format "<dd:>hh:mm:ss" */ public static String durationMillisToShortDHMS(long duration) { long d = duration; int millis = (int) (d % ONE_SECOND); d /= ONE_SECOND; int seconds = (int) (d % SECONDS); d /= SECONDS; int minutes = (int) (d % MINUTES); d /= MINUTES; int hours = (int) (d % HOURS); int days = (int) (d / HOURS); if (days > 0) { return messages.durationDHMSShortDays(days, hours, minutes, seconds); } else if (hours > 0) { return messages.durationDHMSShortHours(hours, minutes, seconds); } else if (minutes > 0) { return messages.durationDHMSShortMinutes(minutes, seconds); } else if (seconds > 0) { return messages.durationDHMSShortSeconds(seconds); } else { return messages.durationDHMSShortMillis(millis); } } /** * converts time (in milliseconds) to human-readable format "<w> days, * <x> hours, <y> minutes and (z) seconds" */ public static String durationMillisToLongDHMS(long duration) { long d = duration; d /= ONE_SECOND; int seconds = (int) (d % SECONDS); d /= SECONDS; int minutes = (int) (d % MINUTES); d /= MINUTES; int hours = (int) (d % HOURS); int days = (int) (d / HOURS); if (days > 0) { return messages.durationDHMSLongDays(days, hours, minutes, seconds); } else if (hours > 0) { return messages.durationDHMSLongHours(hours, minutes, seconds); } else if (minutes > 0) { return messages.durationDHMSLongMinutes(minutes, seconds); } else { return messages.durationDHMSLongSeconds(seconds); } } /** * Format a value in milliseconds as a string * * @param value * @param showMillis * @return a formatted string for time duration */ public static String formatValueMilliseconds(long value, boolean showMillis) { long hours = value / 3600000; long minutes = (value % 3600000) / 60000; long seconds = ((value % 3600000) % 60000) / 1000; long millis = value % 1000; NumberFormat numberFormat = NumberFormat.getFormat("00"); NumberFormat millisFormat = NumberFormat.getFormat("000"); if (showMillis) { return numberFormat.format(hours) + ":" + numberFormat.format(minutes) + ":" + numberFormat.format(seconds) + "." + millisFormat.format(millis); } else { return numberFormat.format(hours) + ":" + numberFormat.format(minutes) + ":" + numberFormat.format(seconds); } } public static String formatDate(Date date) { return DATE_FORMAT.format(date); } public static String formatDateTime(Date date) { return DATE_TIME_FORMAT.format(date); } public static String formatDateTimeMs(Date date) { return DATE_TIME_MS_FORMAT.format(date); } }