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Groovy: A powerful, dynamic language for the JVM
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package groovy.json.internal;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
/**
* @author Rick Hightower
*/
public class Dates {
private static TimeZone UTC_TIME_ZONE = TimeZone.getTimeZone("UTC");
public static long utc(long time) {
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(time);
calendar.setTimeZone(UTC_TIME_ZONE);
return calendar.getTime().getTime();
}
private static Date internalDate(TimeZone tz, int year, int month, int day, int hour,
int minute, int second, int miliseconds) {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, month - 1);
calendar.set(Calendar.DAY_OF_MONTH, day);
calendar.set(Calendar.HOUR_OF_DAY, hour);
calendar.set(Calendar.MINUTE, minute);
calendar.set(Calendar.SECOND, second);
calendar.set(Calendar.MILLISECOND, miliseconds);
calendar.setTimeZone(tz);
return calendar.getTime();
}
public static Date toDate(TimeZone tz, int year, int month, int day,
int hour, int minute, int second) {
return internalDate(tz, year, month, day, hour, minute, second, 0);
}
public static Date toDate(TimeZone tz, int year, int month, int day,
int hour, int minute, int second, int miliseconds) {
return internalDate(tz, year, month, day, hour, minute, second, miliseconds);
}
static final int SHORT_ISO_8601_TIME_LENGTH = "1994-11-05T08:15:30Z".length();
static final int LONG_ISO_8601_TIME_LENGTH = "1994-11-05T08:15:30-05:00".length();
public static final int JSON_TIME_LENGTH = "2013-12-14T01:55:33.412Z".length();
public static Date fromISO8601(char[] charArray, int from, int to) {
try {
if (isISO8601(charArray, from, to)) {
int year = CharScanner.parseIntFromTo(charArray, from, from + 4);
int month = CharScanner.parseIntFromTo(charArray, from + 5, from + 7);
int day = CharScanner.parseIntFromTo(charArray, from + 8, from + 10);
int hour = CharScanner.parseIntFromTo(charArray, from + 11, from + 13);
int minute = CharScanner.parseIntFromTo(charArray, from + 14, from + 16);
int second = CharScanner.parseIntFromTo(charArray, from + 17, from + 19);
TimeZone tz = null;
if (charArray[from + 19] == 'Z') {
tz = TimeZone.getTimeZone("GMT");
} else {
String tzStr = "GMT" + String.valueOf(charArray, from + 19, 6);
tz = TimeZone.getTimeZone(tzStr);
}
return toDate(tz, year, month, day, hour, minute, second);
} else {
return null;
}
} catch (Exception ex) {
return null;
}
}
public static Date fromJsonDate(char[] charArray, int from, int to) {
try {
if (isJsonDate(charArray, from, to)) {
int year = CharScanner.parseIntFromTo(charArray, from, from + 4);
int month = CharScanner.parseIntFromTo(charArray, from + 5, from + 7);
int day = CharScanner.parseIntFromTo(charArray, from + 8, from + 10);
int hour = CharScanner.parseIntFromTo(charArray, from + 11, from + 13);
int minute = CharScanner.parseIntFromTo(charArray, from + 14, from + 16);
int second = CharScanner.parseIntFromTo(charArray, from + 17, from + 19);
int miliseconds = CharScanner.parseIntFromTo(charArray, from + 20, from + 23);
TimeZone tz = TimeZone.getTimeZone("GMT");
return toDate(tz, year, month, day, hour, minute, second, miliseconds);
} else {
return null;
}
} catch (Exception ex) {
return null;
}
}
public static boolean isISO8601(char[] charArray, int start, int to) {
boolean valid = true;
final int length = to - start;
if (length == SHORT_ISO_8601_TIME_LENGTH) {
valid &= (charArray[start + 19] == 'Z');
} else if (length == LONG_ISO_8601_TIME_LENGTH) {
valid &= (charArray[start + 19] == '-' || charArray[start + 19] == '+');
valid &= (charArray[start + 22] == ':');
} else {
return false;
}
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4
// "1 9 9 4 - 1 1 - 0 5 T 0 8 : 1 5 : 3 0 - 0 5 : 0 0
valid &= (charArray[start + 4] == '-') &&
(charArray[start + 7] == '-') &&
(charArray[start + 10] == 'T') &&
(charArray[start + 13] == ':') &&
(charArray[start + 16] == ':');
return valid;
}
public static boolean isISO8601QuickCheck(char[] charArray, int start, int to) {
final int length = to - start;
try {
return length == JSON_TIME_LENGTH || length == LONG_ISO_8601_TIME_LENGTH
|| length == SHORT_ISO_8601_TIME_LENGTH || (length >= 17 && (charArray[start + 16] == ':'));
} catch (Exception ex) {
ex.printStackTrace();
return false;
}
}
public static boolean isJsonDate(char[] charArray, int start, int to) {
boolean valid = true;
final int length = to - start;
if (length != JSON_TIME_LENGTH) {
return false;
}
valid &= (charArray[start + 19] == '.' || charArray[start + 19] == '+');
if (!valid) {
return false;
}
valid &= (charArray[start + 4] == '-') &&
(charArray[start + 7] == '-') &&
(charArray[start + 10] == 'T') &&
(charArray[start + 13] == ':') &&
(charArray[start + 16] == ':');
return valid;
}
}