com.orientechnologies.orient.core.iterator

Class ORecordIteratorClass<REC extends ORecord>

java.lang.Object

com.orientechnologies.orient.core.iterator.OIdentifiableIterator<REC>

com.orientechnologies.orient.core.iterator.ORecordIteratorClusters<REC>

com.orientechnologies.orient.core.iterator.ORecordIteratorClass<REC>

All Implemented Interfaces:

Iterable<REC>, Iterator<REC>

Direct Known Subclasses:

ORecordIteratorClassDescendentOrder

public class ORecordIteratorClass<REC extends ORecord>
extends ORecordIteratorClusters<REC>

Iterator class to browse forward and backward the records of a cluster. Once browsed in a direction, the iterator cannot change it. This iterator with "live updates" set is able to catch updates to the cluster sizes while browsing. This is the case when concurrent clients/threads insert and remove item in any cluster the iterator is browsing. If the cluster are hot removed by from the database the iterator could be invalid and throw exception of cluster not found.

Author:

Luca Garulli (l.garulli--(at)--orientdb.com)

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	polymorphic
protected OClass	targetClass

Fields inherited from class com.orientechnologies.orient.core.iterator.ORecordIteratorClusters

beginRange, clusterIds, currentClusterIdx, currentRecord, endRange

Fields inherited from class com.orientechnologies.orient.core.iterator.OIdentifiableIterator

browsedRecords, current, currentTxEntryPosition, database, firstClusterEntry, lastClusterEntry, limit, liveUpdated, lockingStrategy, totalAvailableRecords, txEntries

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ORecordIteratorClass(ODatabaseDocumentInternal database, OClass targetClass, boolean polymorphic)
	ORecordIteratorClass(ODatabaseDocumentInternal iDatabase, String iClassName, boolean iPolymorphic)
	ORecordIteratorClass(ODatabaseDocumentInternal iDatabase, String iClassName, boolean iPolymorphic, boolean begin)
	ORecordIteratorClass(ODatabaseDocumentInternal iDatabase, String iClassName, boolean iPolymorphic, OStorage.LOCKING_STRATEGY iLockingStrategy) Deprecated.

Method Summary

Modifier and Type	Method and Description
protected void	config()
OClass	getTargetClass()
protected boolean	include(ORecord record)
boolean	isPolymorphic()
REC	next() Return the element at the current position and move forward the cursor to the next position available.
REC	previous() Return the element at the current position and move backward the cursor to the previous position available.
String	toString()

Methods inherited from class com.orientechnologies.orient.core.iterator.ORecordIteratorClusters

begin, getBeginRange, getClusterIds, getEndRange, hasNext, hasPrevious, last, setLiveUpdated, setRange, updateClusterRange

Methods inherited from class com.orientechnologies.orient.core.iterator.OIdentifiableIterator

checkCurrentPosition, checkDirection, checkForSystemClusters, current, currentPosition, getBrokenRIDs, getCurrentEntry, getFetchPlan, getLimit, getRecord, getTransactionEntry, isLiveUpdated, isReuseSameRecord, iterator, nextPosition, prevPosition, readCurrentRecord, remove, resetCurrentPosition, setFetchPlan, setLimit, setReuseSameRecord

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

targetClass

protected final OClass targetClass

polymorphic

protected boolean polymorphic

Constructor Detail

ORecordIteratorClass

public ORecordIteratorClass(ODatabaseDocumentInternal iDatabase,
                            String iClassName,
                            boolean iPolymorphic)

ORecordIteratorClass

public ORecordIteratorClass(ODatabaseDocumentInternal iDatabase,
                            String iClassName,
                            boolean iPolymorphic,
                            boolean begin)

ORecordIteratorClass

@Deprecated
public ORecordIteratorClass(ODatabaseDocumentInternal iDatabase,
                                        String iClassName,
                                        boolean iPolymorphic,
                                        OStorage.LOCKING_STRATEGY iLockingStrategy)

Deprecated.

ORecordIteratorClass

protected ORecordIteratorClass(ODatabaseDocumentInternal database,
                               OClass targetClass,
                               boolean polymorphic)

Method Detail

next

public REC next()

Description copied from class: ORecordIteratorClusters

Return the element at the current position and move forward the cursor to the next position available.

Specified by:

next in interface Iterator<REC extends ORecord>

Overrides:

next in class ORecordIteratorClusters<REC extends ORecord>

Returns:

the next record found, otherwise the NoSuchElementException exception is thrown when no more records are found.

previous

public REC previous()

Description copied from class: ORecordIteratorClusters

Return the element at the current position and move backward the cursor to the previous position available.

Overrides:

previous in class ORecordIteratorClusters<REC extends ORecord>

Returns:

the previous record found, otherwise the NoSuchElementException exception is thrown when no more records are found.

isPolymorphic

public boolean isPolymorphic()

toString

public String toString()

Overrides:

toString in class ORecordIteratorClusters<REC extends ORecord>

include

protected boolean include(ORecord record)

Overrides:

include in class ORecordIteratorClusters<REC extends ORecord>

getTargetClass

public OClass getTargetClass()

config

protected void config()

Overrides:

config in class ORecordIteratorClusters<REC extends ORecord>