You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@commons.apache.org by st...@apache.org on 2004/07/11 19:53:31 UTC
cvs commit: jakarta-commons-sandbox/lang/src/java/org/apache/commons/lang DateFormatter.java
stevencaswell 2004/07/11 10:53:31
Added: lang/src/java/org/apache/commons/lang DateFormatter.java
Log:
Moved to the sandbox from comment-out code in DateUtils
PR: http://issues.apache.org/bugzilla/show_bug.cgi?id=22172
Submitted by: Serge Knystautas sergek@lokitech.com
CVS: ----------------------------------------------------------------------
CVS: PR:
CVS: If this change addresses a PR in the problem report tracking
CVS: database, then enter the PR number(s) here.
CVS: Obtained from:
CVS: If this change has been taken from another system, such as NCSA,
CVS: then name the system in this line, otherwise delete it.
CVS: Submitted by:
CVS: If this code has been contributed to Apache by someone else; i.e.,
CVS: they sent us a patch or a new module, then include their name/email
CVS: address here. If this is your work then delete this line.
CVS: Reviewed by:
CVS: If we are doing pre-commit code reviews and someone else has
CVS: reviewed your changes, include their name(s) here.
CVS: If you have not had it reviewed then delete this line.
Revision Changes Path
1.1 jakarta-commons-sandbox/lang/src/java/org/apache/commons/lang/DateFormatter.java
Index: DateFormatter.java
===================================================================
package org.apache.commons.lang;
import java.text.DateFormat;
import java.text.DateFormatSymbols;
import java.text.ParseException;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
public class DateFormatter {
/*
* <p>Parses a date string formatted in CVS format.</p>
*
* @param dateStr the date to parse
* @return the parsed date
* @throws IllegalArgumentException if the date cannot be parsed
*/
public static Calendar parseCVS(String dateStr) {
if (dateStr == null) {
throw new IllegalArgumentException("The date must not be null");
}
//Get the symbol names
DateFormatSymbols symbols = new DateFormatSymbols(Locale.ENGLISH);
DateFormat[] dateFormats = new DateFormat[0];
//Prep the string to parse
String value = dateStr.toLowerCase().trim();
//Get the current date/time
Calendar now = Calendar.getInstance();
if (value.endsWith(" ago")) {
//If this was a date that was "ago" the current time...
//Strip out the ' ago' part
value = value.substring(0, value.length() - 4);
//Split the value and unit
int start = value.indexOf(" ");
if (start < 0) {
throw new IllegalArgumentException("Could not find space in between value and unit");
}
String unit = value.substring(start + 1);
value = value.substring(0, start);
//We support "a week", so we need to parse the value as "a"
int val = 0;
if (value.equals("a") || value.equals("an")) {
val = 1;
} else {
val = Integer.parseInt(value);
}
//Determine the unit
if (unit.equals("milliseconds") || unit.equals("millisecond")) {
now.add(Calendar.MILLISECOND, -val);
} else if (unit.equals("seconds") || unit.equals("second")) {
now.add(Calendar.SECOND, -val);
} else if (unit.equals("minutes") || unit.equals("minute")) {
now.add(Calendar.MINUTE, -val);
} else if (unit.equals("hours") || unit.equals("hour")) {
now.add(Calendar.HOUR, -val);
} else if (unit.equals("days") || unit.equals("day")) {
now.add(Calendar.DATE, -val);
} else if (unit.equals("weeks") || unit.equals("week")) {
now.add(Calendar.DATE, -val * 7);
} else if (unit.equals("fortnights") || unit.equals("fortnight")) {
now.add(Calendar.DATE, -val * 14);
} else if (unit.equals("months") || unit.equals("month")) {
now.add(Calendar.MONTH, -val);
} else if (unit.equals("years") || unit.equals("year")) {
now.add(Calendar.YEAR, -val);
} else {
throw new IllegalArgumentException("We do not understand that many units ago");
}
return now;
} else if (value.startsWith("last ")) {
//If this was the last time a certain field was met
//Strip out the 'last ' part
value = value.substring(5);
//Get the current date/time
String[] strings = symbols.getWeekdays();
for (int i = 0; i < strings.length; i++) {
if (value.equalsIgnoreCase(strings[i])) {
//How many days after Sunday
int daysAgo = now.get(Calendar.DAY_OF_WEEK) - i;
if (daysAgo <= 0) {
daysAgo += 7;
}
now.add(Calendar.DATE, -daysAgo);
return now;
}
}
strings = symbols.getMonths();
for (int i = 0; i < strings.length; i++) {
if (value.equalsIgnoreCase(strings[i])) {
//How many days after January
int monthsAgo = now.get(Calendar.MONTH) - i;
if (monthsAgo <= 0) {
monthsAgo += 12;
}
now.add(Calendar.MONTH, -monthsAgo);
return now;
}
}
if (value.equals("week")) {
now.add(Calendar.DATE, -7);
return now;
}
throw new IllegalArgumentException("We do not understand that last units");
} else if (value.equals("yesterday")) {
now.add(Calendar.DATE, -1);
return now;
} else if (value.equals("tomorrow")) {
now.add(Calendar.DATE, 1);
return now;
}
//Try to parse the date a number of different ways
for (int i = 0; i < dateFormats.length; i++) {
try {
Date datetime = dateFormats[i].parse(dateStr);
Calendar cal = Calendar.getInstance();
cal.setTime(datetime);
return cal;
} catch (ParseException pe) {
//we ignore this and just keep trying
}
}
throw new IllegalArgumentException("Unable to parse '" + dateStr + "'.");
}
}
---------------------------------------------------------------------
To unsubscribe, e-mail: commons-dev-unsubscribe@jakarta.apache.org
For additional commands, e-mail: commons-dev-help@jakarta.apache.org