org.apache.nifi.reporting.sql.provenance

Class ProvenanceEnumerator

java.lang.Object

org.apache.nifi.reporting.sql.provenance.ProvenanceEnumerator

All Implemented Interfaces:

AutoCloseable, org.apache.calcite.linq4j.Enumerator<Object>

public class ProvenanceEnumerator
extends Object
implements org.apache.calcite.linq4j.Enumerator<Object>

Field Summary

Fields

Modifier and Type	Field and Description
private ComponentMapHolder	componentMapHolder
private long	currentId
private int	currentIndex
private Object	currentRow
private static int	FETCH_SIZE
private int[]	fields
private ComponentLog	logger
private String	nodeIdentifier
private ProvenanceEventRepository	provenanceEventRepository
private List<ProvenanceEventRecord>	provenanceEvents

Constructor Summary

Constructors

Constructor and Description
ProvenanceEnumerator(ReportingContext context, ComponentLog logger, int[] fields)

Method Summary

Modifier and Type	Method and Description
void	close()
Object	current()
private Object	filterColumns(ProvenanceEventRecord provenanceEvent)
protected int	getRecordsRead()
boolean	moveNext()
protected void	onFinish()
void	reset()

Methods inherited from class java.lang.Object

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

Field Detail

FETCH_SIZE

private static final int FETCH_SIZE

See Also:

Constant Field Values

logger

private final ComponentLog logger

fields

private final int[] fields

provenanceEventRepository

private final ProvenanceEventRepository provenanceEventRepository

provenanceEvents

private List<ProvenanceEventRecord> provenanceEvents

componentMapHolder

private final ComponentMapHolder componentMapHolder

nodeIdentifier

private final String nodeIdentifier

currentRow

private Object currentRow

currentId

private long currentId

currentIndex

private int currentIndex

Constructor Detail

ProvenanceEnumerator

public ProvenanceEnumerator(ReportingContext context,
                            ComponentLog logger,
                            int[] fields)

Method Detail

current

public Object current()

Specified by:

current in interface org.apache.calcite.linq4j.Enumerator<Object>

moveNext

public boolean moveNext()

Specified by:

moveNext in interface org.apache.calcite.linq4j.Enumerator<Object>

getRecordsRead

protected int getRecordsRead()

onFinish

protected void onFinish()

filterColumns

private Object filterColumns(ProvenanceEventRecord provenanceEvent)

reset

public void reset()

Specified by:

reset in interface org.apache.calcite.linq4j.Enumerator<Object>

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface org.apache.calcite.linq4j.Enumerator<Object>