org.springframework.data.history

Interface RevisionMetadata<N extends Number & Comparable<N>>

All Known Implementing Classes:

AnnotationRevisionMetadata

public interface RevisionMetadata<N extends Number & Comparable<N>>

Metadata about a revision.

Author:

Philipp Huegelmeyer, Oliver Gierke, Jens Schauder

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	RevisionMetadata.RevisionType The type of a Revision.

Method Summary

Modifier and Type	Method and Description
<T> T	getDelegate() Returns the underlying revision metadata which might provider more detailed implementation specific information.
default Instant	getRequiredRevisionInstant() Returns the time stamp of the revision, immediately failing on absence.
default N	getRequiredRevisionNumber() Returns the revision number of the revision, immediately failing on absence.
Optional<Instant>	getRevisionInstant() Returns the timestamp of the revision.
Optional<N>	getRevisionNumber() Returns the revision number of the revision.
default RevisionMetadata.RevisionType	getRevisionType() Returns the RevisionMetadata.RevisionType of this change.

Method Detail

getRevisionNumber

Optional<N> getRevisionNumber()

Returns the revision number of the revision.

Returns:

will never be null.

getRequiredRevisionNumber

default N getRequiredRevisionNumber()

Returns the revision number of the revision, immediately failing on absence.

Returns:

will never be null.

Throws:

IllegalStateException - if no revision number is available.

getRevisionInstant

Optional<Instant> getRevisionInstant()

Returns the timestamp of the revision.

Returns:

will never be null.

getRequiredRevisionInstant

default Instant getRequiredRevisionInstant()

Returns the time stamp of the revision, immediately failing on absence.

Returns:

will never be null.

Throws:

IllegalStateException - if no revision date is available.

getDelegate

<T> T getDelegate()

Returns the underlying revision metadata which might provider more detailed implementation specific information.

Returns:

getRevisionType

default RevisionMetadata.RevisionType getRevisionType()

Returns the RevisionMetadata.RevisionType of this change. If the RevisionMetadata.RevisionType cannot be determined, this method returns RevisionMetadata.RevisionType.UNKNOWN.

Returns:

will never be null.

Since:

2.2.0