Class AbstractHistoryOperation
java.lang.Object
org.odpi.openmetadata.adapters.repositoryservices.xtdb.repositoryconnector.readops.AbstractReadOperation
org.odpi.openmetadata.adapters.repositoryservices.xtdb.repositoryconnector.readops.AbstractHistoryOperation
- Direct Known Subclasses:
GetEntityHistory
,GetRelationshipHistory
Base class that all metadata instance history retrieval operations should implement.
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected final int
protected final Date
protected final String
protected final int
protected final HistorySequencingOrder
Fields inherited from class org.odpi.openmetadata.adapters.repositoryservices.xtdb.repositoryconnector.readops.AbstractReadOperation
asOfTime, existingDB, xtdb
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Constructor Summary
ConstructorsModifierConstructorDescriptionprotected
AbstractHistoryOperation
(XTDBOMRSRepositoryConnector xtdb, String instanceGUID, Date fromTime, Date toTime, int fromElement, int pageSize, HistorySequencingOrder sequencingOrder) Create a new history retrieval operation. -
Method Summary
Modifier and TypeMethodDescriptionprotected List<xtdb.api.XtdbDocument>
getPreviousVersions
(xtdb.api.IXtdbDatasource db, String reference, Date earliest, HistorySequencingOrder order) Retrieve the previous versions of the provided XTDB object, from an already-opened point-in-time view of the repository back to the earliest point in time defined by the 'earliest' parameter.Methods inherited from class org.odpi.openmetadata.adapters.repositoryservices.xtdb.repositoryconnector.readops.AbstractReadOperation
getXtdbObjectByReference
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Field Details
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instanceGUID
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fromTime
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fromElement
protected final int fromElement -
pageSize
protected final int pageSize -
sequencingOrder
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Constructor Details
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AbstractHistoryOperation
protected AbstractHistoryOperation(XTDBOMRSRepositoryConnector xtdb, String instanceGUID, Date fromTime, Date toTime, int fromElement, int pageSize, HistorySequencingOrder sequencingOrder) Create a new history retrieval operation.- Parameters:
xtdb
- connectivity to XTDBinstanceGUID
- unique identifier of a metadata instance for which to retrieve historyfromTime
- the earliest point in time from which to retrieve historical versions of the entity (inclusive)toTime
- the latest point in time from which to retrieve historical versions of the entity (exclusive)fromElement
- starting element for paged resultspageSize
- the number of results to include per pagesequencingOrder
- Enum defining how the results should be ordered.
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Method Details
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getPreviousVersions
protected List<xtdb.api.XtdbDocument> getPreviousVersions(xtdb.api.IXtdbDatasource db, String reference, Date earliest, HistorySequencingOrder order) throws RepositoryErrorException Retrieve the previous versions of the provided XTDB object, from an already-opened point-in-time view of the repository back to the earliest point in time defined by the 'earliest' parameter.- Parameters:
db
- from which to retrieve the previous versionreference
- indicating the primary key of the object for which to retrieve the previous versionearliest
- the earliest version to retrieveorder
- indicating either chronological (forward) or reverse-chronological (backward) ordering of results- Returns:
List<XtdbDocument>
with all versions of the XTDB object back to the earliest point specified, ordered as requested- Throws:
RepositoryErrorException
- if any issue closing the lazy-evaluating cursor
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