Package org.odpi.egeria.connectors.juxt.xtdb.readops

Class AbstractReadOperation

java.lang.Object

org.odpi.egeria.connectors.juxt.xtdb.readops.AbstractReadOperation

Direct Known Subclasses:

AbstractGraphOperation, AbstractHistoryOperation, AbstractSearchOperation, GetEntity, GetRelationship

public abstract class AbstractReadOperation
extends Object

Base class that all read operations should implement.

Field Summary

Fields

Modifier and Type	Field	Description
protected Date	asOfTime
protected xtdb.api.IXtdbDatasource	existingDB
protected XtdbOMRSRepositoryConnector	xtdb

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractReadOperation(XtdbOMRSRepositoryConnector xtdb, Date asOfTime)	Default constructor ensures that a consistent datasource is created and used for the entirety of the operation, and further ensures it is fully-closed afterwards irrespective of any exceptions.
protected	AbstractReadOperation(XtdbOMRSRepositoryConnector xtdb, xtdb.api.IXtdbDatasource existingDB)	Alternative constructor to use if an existing datasource is already open that we want to re-use for this operation.

Method Summary

Modifier and Type	Method	Description
static xtdb.api.XtdbDocument	getXtdbObjectByReference(xtdb.api.IXtdbDatasource db, String reference)	Retrieve the requested reference's details from an already-open XTDB datasource.

Methods inherited from class java.lang.Object

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

Field Detail

xtdb

protected final XtdbOMRSRepositoryConnector xtdb

asOfTime

protected final Date asOfTime

existingDB

protected final xtdb.api.IXtdbDatasource existingDB

Constructor Detail

AbstractReadOperation

protected AbstractReadOperation(XtdbOMRSRepositoryConnector xtdb,
                                Date asOfTime)

Default constructor ensures that a consistent datasource is created and used for the entirety of the operation, and further ensures it is fully-closed afterwards irrespective of any exceptions.

Parameters:

xtdb - connectivity to XTDB

asOfTime - (optional) validity time for which to open the datasource

AbstractReadOperation

protected AbstractReadOperation(XtdbOMRSRepositoryConnector xtdb,
                                xtdb.api.IXtdbDatasource existingDB)

Alternative constructor to use if an existing datasource is already open that we want to re-use for this operation.

Parameters:

xtdb - connectivity to XTDB

existingDB - already-opened datasource to re-use

Method Detail

getXtdbObjectByReference

public static xtdb.api.XtdbDocument getXtdbObjectByReference(xtdb.api.IXtdbDatasource db,
                                                             String reference)

Retrieve the requested reference's details from an already-open XTDB datasource.

Parameters:

db - from which to retrieve the details

reference - indicating the primary key of the XTDB object to retrieve

Returns:

XtdbDocument of the object's properties