Class DateTools

Provides support for converting dates to strings and vice-versa. The strings are structured so that lexicographic sorting orders them by date, which makes them suitable for use as field values and search terms.

This class also helps you to limit the resolution of your dates. Do not save dates with a finer resolution than you really need, as then TermRangeQuery and PrefixQuery will require more memory and become slower.

Another approach is NumericUtils, which provides a sortable binary representation (prefix encoded) of numeric values, which date/time are.

For indexing a , just get the and index this as a numeric value with Int64Field and use NumericRangeQuery<T> to query it.

Inheritance
System.Object
DateTools
Assembly: DistributedLucene.Net.dll
Syntax
public static class DateTools : object

Methods

Name Description
DateToString(DateTime, DateTools.Resolution)

Converts a to a string suitable for indexing.
Round(DateTime, DateTools.Resolution)

Limit a date's resolution. For example, the date 2004-09-21 13:50:11 will be changed to 2004-09-01 00:00:00 when using MONTH.
Round(Int64, DateTools.Resolution)

Limit a date's resolution. For example, the date 1095767411000 (which represents 2004-09-21 13:50:11) will be changed to 1093989600000 (2004-09-01 00:00:00) when using MONTH.
StringToDate(String)

Converts a string produced by TimeToString(Int64, DateTools.Resolution) or DateToString(DateTime, DateTools.Resolution) back to a time, represented as a object.
StringToTime(String)

Converts a string produced by TimeToString(Int64, DateTools.Resolution) or DateToString(DateTime, DateTools.Resolution) back to a time, represented as the number of milliseconds since January 1, 1970, 00:00:00 GMT (also known as the "epoch").
TimeToString(Int64, DateTools.Resolution)

Converts a millisecond time to a string suitable for indexing.