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 net45, netstandard1.3, netstandard2.0
Inheritance
Object
Resolvers
Inherited Members
Object.ToString()
Object.Equals(Object)
Object.Equals(Object, Object)
Object.ReferenceEquals(Object, Object)
Object.GetHashCode()
Object.GetType()
Object.MemberwiseClone()
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 net45, netstandard1.3, 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. (The value returned is never null.)
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

ReturnEarlier

An AmbiguousTimeResolver which returns the earlier of the two matching times.
Since 1.0.x
Availability net45, netstandard1.3, netstandard2.0
Declaration
public static AmbiguousTimeResolver ReturnEarlier { get; }
Property Value
Type Description
AmbiguousTimeResolver An AmbiguousTimeResolver which returns the earlier of the two matching times. (The value returned is never null.)

ReturnEndOfIntervalBefore

A SkippedTimeResolver which returns the final tick of the time zone interval before the "gap".
Since 1.0.x
Availability net45, netstandard1.3, 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". (The value returned is never null.)

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 net45, netstandard1.3, 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). (The value returned is never null.)

ReturnLater

An AmbiguousTimeResolver which returns the later of the two matching times.
Since 1.0.x
Availability net45, netstandard1.3, netstandard2.0
Declaration
public static AmbiguousTimeResolver ReturnLater { get; }
Property Value
Type Description
AmbiguousTimeResolver An AmbiguousTimeResolver which returns the later of the two matching times. (The value returned is never null.)

ReturnStartOfIntervalAfter

A SkippedTimeResolver which returns the first tick of the time zone interval after the "gap".
Since 1.0.x
Availability net45, netstandard1.3, 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". (The value returned is never null.)

StrictResolver

A ZoneLocalMappingResolver which only ever succeeds in the (usual) case where the result of the mapping is unambiguous.
Since 1.0.x
Availability net45, netstandard1.3, 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. (The value returned is never null.)
Remarks
If the mapping is ambiguous or skipped, this throws SkippedTimeException or AmbiguousTimeException, as appropriate. This resolver combines ThrowWhenAmbiguous and ThrowWhenSkipped.
See Also

ThrowWhenAmbiguous

An AmbiguousTimeResolver which simply throws an AmbiguousTimeException.
Since 1.0.x
Availability net45, netstandard1.3, netstandard2.0
Declaration
public static AmbiguousTimeResolver ThrowWhenAmbiguous { get; }
Property Value
Type Description
AmbiguousTimeResolver An AmbiguousTimeResolver which simply throws an AmbiguousTimeException. (The value returned is never null.)

ThrowWhenSkipped

A SkippedTimeResolver which simply throws a SkippedTimeException.
Since 1.0.x
Availability net45, netstandard1.3, netstandard2.0
Declaration
public static SkippedTimeResolver ThrowWhenSkipped { get; }
Property Value
Type Description
SkippedTimeResolver A SkippedTimeResolver which simply throws a SkippedTimeException. (The value returned is never null.)

Methods

CreateMappingResolver(AmbiguousTimeResolver, SkippedTimeResolver)

Combines an AmbiguousTimeResolver and a SkippedTimeResolver to create a ZoneLocalMappingResolver.
Since 1.0.x
Availability net45, netstandard1.3, 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. (The value returned is never null.)
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.
Exceptions
Type Condition
ArgumentNullException ambiguousTimeResolver or skippedTimeResolver is null