Package org.odpi.openmetadata.adapters.connectors.mendel

Class MendelDuplicateConsolidator

java.lang.Object

org.odpi.openmetadata.adapters.connectors.mendel.MendelDuplicateConsolidator

public class MendelDuplicateConsolidator
extends Object

MendelDuplicateConsolidator combines a cluster of validated peer duplicates into a single consolidated element, using survivorship rules to decide what the consolidated element contains.

• The properties come from the latest version of the cluster's members. A property that only an earlier version supplies is added, so nothing that a member knows about is lost.
• The qualified name is derived rather than inherited - the original with the ISO-8601 time of the merge appended - because a qualified name is unique and the members still hold theirs.
• The classifications of all of the members are combined. Where more than one member carries the same classification, the one from the latest member wins.
• The relationships of all of the members are combined. A relationship is skipped when adding it would break the cardinality rules of its type - and where two members conflict on a relationship that the type only permits one of, the one from the latest member wins.

Wherever the survivorship rules have to choose - two members disagree on the value of a property or of a classification, or the consolidated element can only carry one of two relationships - the losing value is reported to the audit log so that a steward can see what the consolidated element left behind. The same is done for the content that can not be carried at all: a cluster whose members are of different types can hold properties and classifications that the consolidated element's type does not allow.

The consolidated element carries the ConsolidatedDuplicate classification with a status of VALIDATED, and is linked to each of its members with a ConsolidatedDuplicateLink relationship. That combination causes the retrieval processing to return the consolidated element in place of the members.

Constructor Summary

Constructors

Constructor	Description
MendelDuplicateConsolidator(IntegrationContext integrationContext, PropertyHelper propertyHelper, String connectorName, AuditLog auditLog)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	consolidateCluster(List<OpenMetadataElementStub> members)	Consolidate a cluster of validated peer duplicates into a single element.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MendelDuplicateConsolidator

public MendelDuplicateConsolidator(IntegrationContext integrationContext,
 PropertyHelper propertyHelper,
 String connectorName,
 AuditLog auditLog)

Constructor.

Parameters:

integrationContext - context giving access to open metadata

propertyHelper - helper for working with element properties

connectorName - name of the calling connector - used in messages

auditLog - logging destination

Method Details

consolidateCluster

public void consolidateCluster(List<OpenMetadataElementStub> members)
                        throws Exception

Consolidate a cluster of validated peer duplicates into a single element. Nothing happens if the cluster has already been consolidated.

Parameters:

members - the elements in the cluster

Throws:

Exception - the consolidation failed - reported by the caller