Class Resolvers

Commonly-used implementations of the delegates used in resolving a LocalDateTime to a ZonedDateTime, and a method to combine two "partial" resolvers into a full one.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Inheritance

object

Resolvers

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: NodaTime.TimeZones

Assembly: NodaTime.dll

Syntax

public static class Resolvers

Remarks

This class contains predefined implementations of ZoneLocalMappingResolver, AmbiguousTimeResolver, and SkippedTimeResolver, along with CreateMappingResolver(AmbiguousTimeResolver, SkippedTimeResolver), which produces a ZoneLocalMappingResolver from instances of the other two.

Properties

LenientResolver

A ZoneLocalMappingResolver which never throws an exception due to ambiguity or skipped time.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static ZoneLocalMappingResolver LenientResolver { get; }

Property Value

Type	Description
ZoneLocalMappingResolver	A ZoneLocalMappingResolver which never throws an exception due to ambiguity or skipped time.

Remarks

Ambiguity is handled by returning the earlier occurrence, and skipped times are shifted forward by the duration of the gap. This resolver combines ReturnEarlier and ReturnForwardShifted.

Note: The behavior of this resolver was changed in version 2.0 to fit the most commonly seen real-world usage pattern. Previous versions combined the ReturnLater and ReturnStartOfIntervalAfter resolvers, which can still be used separately if desired.

See Also

AtLeniently(LocalDateTime)

ReturnEarlier

An AmbiguousTimeResolver which returns the earlier of the two matching times.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static AmbiguousTimeResolver ReturnEarlier { get; }

Property Value

Type	Description
AmbiguousTimeResolver	An AmbiguousTimeResolver which returns the earlier of the two matching times.

ReturnEndOfIntervalBefore

A SkippedTimeResolver which returns the final tick of the time zone interval before the "gap".

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static SkippedTimeResolver ReturnEndOfIntervalBefore { get; }

Property Value

Type	Description
SkippedTimeResolver	A SkippedTimeResolver which returns the final tick of the time zone interval before the "gap".

ReturnForwardShifted

A SkippedTimeResolver which shifts values in the "gap" forward by the duration of the gap (which is usually 1 hour). This corresponds to the instant that would have occured, had there not been a transition.

Since 2.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static SkippedTimeResolver ReturnForwardShifted { get; }

Property Value

Type	Description
SkippedTimeResolver	A SkippedTimeResolver which shifts values in the "gap" forward by the duration of the gap (which is usually 1 hour).

ReturnLater

An AmbiguousTimeResolver which returns the later of the two matching times.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static AmbiguousTimeResolver ReturnLater { get; }

Property Value

Type	Description
AmbiguousTimeResolver	An AmbiguousTimeResolver which returns the later of the two matching times.

ReturnStartOfIntervalAfter

A SkippedTimeResolver which returns the first tick of the time zone interval after the "gap".

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static SkippedTimeResolver ReturnStartOfIntervalAfter { get; }

Property Value

Type	Description
SkippedTimeResolver	A SkippedTimeResolver which returns the first tick of the time zone interval after the "gap".

StrictResolver

A ZoneLocalMappingResolver which only ever succeeds in the (usual) case where the result of the mapping is unambiguous.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static ZoneLocalMappingResolver StrictResolver { get; }

Property Value

Type	Description
ZoneLocalMappingResolver	A ZoneLocalMappingResolver which only ever succeeds in the (usual) case where the result of the mapping is unambiguous.

Remarks

If the mapping is ambiguous or skipped, this throws SkippedTimeException or AmbiguousTimeException, as appropriate. This resolver combines ThrowWhenAmbiguous and ThrowWhenSkipped.

See Also

AtStrictly(LocalDateTime)

ThrowWhenAmbiguous

An AmbiguousTimeResolver which simply throws an AmbiguousTimeException.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static AmbiguousTimeResolver ThrowWhenAmbiguous { get; }

Property Value

Type	Description
AmbiguousTimeResolver	An AmbiguousTimeResolver which simply throws an AmbiguousTimeException.

ThrowWhenSkipped

A SkippedTimeResolver which simply throws a SkippedTimeException.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static SkippedTimeResolver ThrowWhenSkipped { get; }

Property Value

Type	Description
SkippedTimeResolver	A SkippedTimeResolver which simply throws a SkippedTimeException.

Methods

CreateMappingResolver(AmbiguousTimeResolver, SkippedTimeResolver)

Combines an AmbiguousTimeResolver and a SkippedTimeResolver to create a ZoneLocalMappingResolver.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static ZoneLocalMappingResolver CreateMappingResolver(AmbiguousTimeResolver ambiguousTimeResolver, SkippedTimeResolver skippedTimeResolver)

Parameters

Type	Name	Description
AmbiguousTimeResolver	ambiguousTimeResolver	Resolver to use for ambiguous mappings.
SkippedTimeResolver	skippedTimeResolver	Resolver to use for "skipped" mappings.

Returns

Type	Description
ZoneLocalMappingResolver	The logical combination of the two resolvers.

Remarks

The ZoneLocalMappingResolver created by this method operates in the obvious way: unambiguous mappings are returned directly, ambiguous mappings are delegated to the given AmbiguousTimeResolver, and "skipped" mappings are delegated to the given SkippedTimeResolver.