1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.tools.date;
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3 |
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4 | import java.text.DateFormat;
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5 | import java.text.ParsePosition;
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6 | import java.text.SimpleDateFormat;
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7 | import java.time.Instant;
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8 | import java.time.ZoneId;
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9 | import java.time.ZoneOffset;
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10 | import java.time.ZonedDateTime;
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11 | import java.time.format.DateTimeFormatter;
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12 | import java.util.Date;
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13 | import java.util.Locale;
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14 | import java.util.TimeZone;
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15 | import java.util.concurrent.TimeUnit;
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16 |
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17 | import javax.xml.datatype.DatatypeConfigurationException;
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18 | import javax.xml.datatype.DatatypeFactory;
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19 |
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20 | import org.openstreetmap.josm.data.preferences.BooleanProperty;
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21 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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22 | import org.openstreetmap.josm.tools.Logging;
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23 | import org.openstreetmap.josm.tools.UncheckedParseException;
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24 |
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25 | /**
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26 | * A static utility class dealing with:
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27 | * <ul>
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28 | * <li>parsing XML date quickly and formatting a date to the XML UTC format regardless of current locale</li>
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29 | * <li>providing a single entry point for formatting dates to be displayed in JOSM GUI, based on user preferences</li>
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30 | * </ul>
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31 | * @author nenik
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32 | */
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33 | public final class DateUtils {
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34 |
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35 | /**
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36 | * The UTC time zone.
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37 | */
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38 | public static final TimeZone UTC = TimeZone.getTimeZone("UTC");
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39 |
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40 | /**
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41 | * Property to enable display of ISO dates globally.
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42 | * @since 7299
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43 | */
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44 | public static final BooleanProperty PROP_ISO_DATES = new BooleanProperty("iso.dates", false);
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45 |
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46 | private static final DatatypeFactory XML_DATE;
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47 |
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48 | static {
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49 | DatatypeFactory fact = null;
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50 | try {
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51 | fact = DatatypeFactory.newInstance();
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52 | } catch (DatatypeConfigurationException e) {
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53 | Logging.error(e);
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54 | }
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55 | XML_DATE = fact;
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56 | }
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57 |
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58 | /**
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59 | * Constructs a new {@code DateUtils}.
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60 | */
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61 | private DateUtils() {
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62 | // Hide default constructor for utils classes
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63 | }
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64 |
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65 | /**
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66 | * Parses XML date quickly, regardless of current locale.
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67 | * @param str The XML date as string
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68 | * @return The date
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69 | * @throws UncheckedParseException if the date does not match any of the supported date formats
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70 | */
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71 | public static synchronized Date fromString(String str) {
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72 | return new Date(tsFromString(str));
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73 | }
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74 |
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75 | /**
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76 | * Parses XML date quickly, regardless of current locale.
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77 | * @param str The XML date as string
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78 | * @return The date in milliseconds since epoch
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79 | * @throws UncheckedParseException if the date does not match any of the supported date formats
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80 | */
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81 | public static synchronized long tsFromString(String str) {
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82 | // "2007-07-25T09:26:24{Z|{+|-}01[:00]}"
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83 | if (checkLayout(str, "xxxx-xx-xxTxx:xx:xxZ") ||
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84 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx") ||
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85 | checkLayout(str, "xxxx:xx:xx xx:xx:xx") ||
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86 | checkLayout(str, "xxxx-xx-xx xx:xx:xxZ") ||
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87 | checkLayout(str, "xxxx-xx-xx xx:xx:xx UTC") ||
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88 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx+xx") ||
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89 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx-xx") ||
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90 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx+xx:00") ||
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91 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx-xx:00")) {
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92 | final ZonedDateTime local = ZonedDateTime.of(
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93 | parsePart4(str, 0),
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94 | parsePart2(str, 5),
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95 | parsePart2(str, 8),
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96 | parsePart2(str, 11),
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97 | parsePart2(str, 14),
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98 | parsePart2(str, 17),
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99 | 0,
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100 | // consider EXIF date in default timezone
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101 | checkLayout(str, "xxxx:xx:xx xx:xx:xx") ? ZoneId.systemDefault() : ZoneOffset.UTC
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102 | );
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103 | if (str.length() == 22 || str.length() == 25) {
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104 | final int plusHr = parsePart2(str, 20);
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105 | final long mul = str.charAt(19) == '+' ? -1 : 1;
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106 | return local.plusHours(plusHr * mul).toInstant().toEpochMilli();
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107 | }
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108 | return local.toInstant().toEpochMilli();
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109 | } else if (checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxxZ") ||
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110 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxx") ||
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111 | checkLayout(str, "xxxx:xx:xx xx:xx:xx.xxx") ||
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112 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxx+xx:00") ||
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113 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxx-xx:00")) {
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114 | final ZonedDateTime local = ZonedDateTime.of(
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115 | parsePart4(str, 0),
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116 | parsePart2(str, 5),
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117 | parsePart2(str, 8),
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118 | parsePart2(str, 11),
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119 | parsePart2(str, 14),
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120 | parsePart2(str, 17),
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121 | parsePart3(str, 20) * 1_000_000,
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122 | // consider EXIF date in default timezone
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123 | checkLayout(str, "xxxx:xx:xx xx:xx:xx.xxx") ? ZoneId.systemDefault() : ZoneOffset.UTC
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124 | );
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125 | if (str.length() == 29) {
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126 | final int plusHr = parsePart2(str, 24);
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127 | final long mul = str.charAt(23) == '+' ? -1 : 1;
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128 | return local.plusHours(plusHr * mul).toInstant().toEpochMilli();
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129 | }
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130 | return local.toInstant().toEpochMilli();
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131 | } else {
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132 | // example date format "18-AUG-08 13:33:03"
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133 | SimpleDateFormat f = new SimpleDateFormat("dd-MMM-yy HH:mm:ss");
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134 | Date d = f.parse(str, new ParsePosition(0));
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135 | if (d != null)
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136 | return d.getTime();
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137 | }
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138 |
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139 | try {
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140 | return XML_DATE.newXMLGregorianCalendar(str).toGregorianCalendar().getTimeInMillis();
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141 | } catch (IllegalArgumentException ex) {
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142 | throw new UncheckedParseException("The date string (" + str + ") could not be parsed.", ex);
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143 | }
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144 | }
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145 |
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146 | /**
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147 | * Formats a date to the XML UTC format regardless of current locale.
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148 | * @param timestamp number of seconds since the epoch
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149 | * @return The formatted date
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150 | */
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151 | public static synchronized String fromTimestamp(int timestamp) {
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152 | final ZonedDateTime temporal = Instant.ofEpochMilli(TimeUnit.SECONDS.toMillis(timestamp)).atZone(ZoneOffset.UTC);
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153 | return DateTimeFormatter.ISO_OFFSET_DATE_TIME.format(temporal);
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154 | }
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155 |
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156 | /**
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157 | * Formats a date to the XML UTC format regardless of current locale.
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158 | * @param date The date to format
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159 | * @return The formatted date
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160 | */
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161 | public static synchronized String fromDate(Date date) {
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162 | final ZonedDateTime temporal = date.toInstant().atZone(ZoneOffset.UTC);
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163 | return DateTimeFormatter.ISO_OFFSET_DATE_TIME.format(temporal);
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164 | }
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165 |
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166 | /**
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167 | * Null-safe date cloning method.
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168 | * @param d date to clone, or null
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169 | * @return cloned date, or null
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170 | * @since 11878
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171 | */
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172 | public static Date cloneDate(Date d) {
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173 | return d != null ? (Date) d.clone() : null;
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174 | }
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175 |
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176 | private static boolean checkLayout(String text, String pattern) {
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177 | if (text.length() != pattern.length())
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178 | return false;
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179 | for (int i = 0; i < pattern.length(); i++) {
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180 | char pc = pattern.charAt(i);
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181 | char tc = text.charAt(i);
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182 | if (pc == 'x' && Character.isDigit(tc))
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183 | continue;
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184 | else if (pc == 'x' || pc != tc)
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185 | return false;
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186 | }
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187 | return true;
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188 | }
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189 |
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190 | private static int num(char c) {
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191 | return c - '0';
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192 | }
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193 |
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194 | private static int parsePart2(String str, int off) {
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195 | return 10 * num(str.charAt(off)) + num(str.charAt(off + 1));
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196 | }
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197 |
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198 | private static int parsePart3(String str, int off) {
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199 | return 100 * num(str.charAt(off)) + 10 * num(str.charAt(off + 1)) + num(str.charAt(off + 2));
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200 | }
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201 |
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202 | private static int parsePart4(String str, int off) {
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203 | return 1000 * num(str.charAt(off)) + 100 * num(str.charAt(off + 1)) + 10 * num(str.charAt(off + 2)) + num(str.charAt(off + 3));
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204 | }
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205 |
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206 | /**
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207 | * Returns a new {@code SimpleDateFormat} for date only, according to <a href="https://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a>.
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208 | * @return a new ISO 8601 date format, for date only.
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209 | * @since 7299
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210 | */
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211 | public static SimpleDateFormat newIsoDateFormat() {
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212 | return new SimpleDateFormat("yyyy-MM-dd");
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213 | }
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214 |
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215 | /**
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216 | * Returns a new {@code SimpleDateFormat} for date and time, according to <a href="https://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a>.
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217 | * @return a new ISO 8601 date format, for date and time.
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218 | * @since 7299
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219 | */
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220 | public static SimpleDateFormat newIsoDateTimeFormat() {
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221 | return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssX");
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222 | }
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223 |
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224 | /**
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225 | * Returns a new {@code SimpleDateFormat} for date and time, according to format used in OSM API errors.
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226 | * @return a new date format, for date and time, to use for OSM API error handling.
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227 | * @since 7299
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228 | */
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229 | public static SimpleDateFormat newOsmApiDateTimeFormat() {
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230 | // Example: "2010-09-07 14:39:41 UTC".
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231 | // Always parsed with US locale regardless of the current locale in JOSM
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232 | return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss z", Locale.US);
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233 | }
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234 |
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235 | /**
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236 | * Returns the date format to be used for current user, based on user preferences.
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237 | * @param dateStyle The date style as described in {@link DateFormat#getDateInstance}. Ignored if "ISO dates" option is set
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238 | * @return The date format
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239 | * @since 7299
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240 | */
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241 | public static DateFormat getDateFormat(int dateStyle) {
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242 | if (PROP_ISO_DATES.get()) {
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243 | return newIsoDateFormat();
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244 | } else {
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245 | return DateFormat.getDateInstance(dateStyle, Locale.getDefault());
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246 | }
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247 | }
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248 |
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249 | /**
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250 | * Formats a date to be displayed to current user, based on user preferences.
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251 | * @param date The date to display. Must not be {@code null}
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252 | * @param dateStyle The date style as described in {@link DateFormat#getDateInstance}. Ignored if "ISO dates" option is set
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253 | * @return The formatted date
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254 | * @since 7299
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255 | */
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256 | public static String formatDate(Date date, int dateStyle) {
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257 | CheckParameterUtil.ensureParameterNotNull(date, "date");
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258 | return getDateFormat(dateStyle).format(date);
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259 | }
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260 |
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261 | /**
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262 | * Returns the time format to be used for current user, based on user preferences.
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263 | * @param timeStyle The time style as described in {@link DateFormat#getTimeInstance}. Ignored if "ISO dates" option is set
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264 | * @return The time format
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265 | * @since 7299
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266 | */
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267 | public static DateFormat getTimeFormat(int timeStyle) {
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268 | if (PROP_ISO_DATES.get()) {
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269 | // This is not strictly conform to ISO 8601. We just want to avoid US-style times such as 3.30pm
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270 | return new SimpleDateFormat("HH:mm:ss");
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271 | } else {
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272 | return DateFormat.getTimeInstance(timeStyle, Locale.getDefault());
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273 | }
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274 | }
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275 |
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276 | /**
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277 | * Formats a time to be displayed to current user, based on user preferences.
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278 | * @param time The time to display. Must not be {@code null}
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279 | * @param timeStyle The time style as described in {@link DateFormat#getTimeInstance}. Ignored if "ISO dates" option is set
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280 | * @return The formatted time
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281 | * @since 7299
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282 | */
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283 | public static String formatTime(Date time, int timeStyle) {
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284 | CheckParameterUtil.ensureParameterNotNull(time, "time");
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285 | return getTimeFormat(timeStyle).format(time);
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286 | }
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287 |
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288 | /**
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289 | * Returns the date/time format to be used for current user, based on user preferences.
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290 | * @param dateStyle The date style as described in {@link DateFormat#getDateTimeInstance}. Ignored if "ISO dates" option is set
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291 | * @param timeStyle The time style as described in {@code DateFormat.getDateTimeInstance}. Ignored if "ISO dates" option is set
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292 | * @return The date/time format
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293 | * @since 7299
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294 | */
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295 | public static DateFormat getDateTimeFormat(int dateStyle, int timeStyle) {
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296 | if (PROP_ISO_DATES.get()) {
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297 | // This is not strictly conform to ISO 8601. We just want to avoid US-style times such as 3.30pm
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298 | // and we don't want to use the 'T' separator as a space character is much more readable
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299 | return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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300 | } else {
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301 | return DateFormat.getDateTimeInstance(dateStyle, timeStyle, Locale.getDefault());
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302 | }
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303 | }
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304 |
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305 | /**
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306 | * Formats a date/time to be displayed to current user, based on user preferences.
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307 | * @param datetime The date/time to display. Must not be {@code null}
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308 | * @param dateStyle The date style as described in {@link DateFormat#getDateTimeInstance}. Ignored if "ISO dates" option is set
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309 | * @param timeStyle The time style as described in {@code DateFormat.getDateTimeInstance}. Ignored if "ISO dates" option is set
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310 | * @return The formatted date/time
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311 | * @since 7299
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312 | */
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313 | public static String formatDateTime(Date datetime, int dateStyle, int timeStyle) {
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314 | CheckParameterUtil.ensureParameterNotNull(datetime, "datetime");
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315 | return getDateTimeFormat(dateStyle, timeStyle).format(datetime);
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316 | }
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317 | }
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