Package wt.impact

Class AbstractWTEntryChunkedIterator<E extends WTKeyedMap.WTEntry>

java.lang.Object

wt.impact.AbstractWTEntryChunkedIterator<E>

All Implemented Interfaces:

AutoCloseable, Iterator<E>

Direct Known Subclasses:

WTEntryChunkedIterator, WTValuedEntryChunkedIterator

public class AbstractWTEntryChunkedIterator<E extends WTKeyedMap.WTEntry>
extends Object
implements Iterator<E>, AutoCloseable

WTEntry and WTValuedEntry set iterator that inflates and deflates references in chunks. This iterator keeps memory usage low when iterating over large, deflated maps. This is an abstract implementation used by WTEntryChunkedIterator and WTValuedEntryChunkedIterator.

This iterator can only be used in the method server.

Supported API: true

Extendable: false

See Also:

• WTEntryChunkedIterator
• WTKeyedMap.WTEntry
• WTValuedEntryChunkedIterator
• WTEntry#WTValuedEntry

Constructor Summary

Constructors

Constructor	Description
AbstractWTEntryChunkedIterator(WTKeyedMap map, int chunkSize, Class<? extends Persistable> keyFilter, boolean includeSubclasses)	Construct a new WTEntryChunkedIterator for map entries with filtered keys.

Method Summary

Modifier and Type	Method	Description
void	close()	Deflate references and clear chunk collections.
boolean	hasNext()	Supported API: true
E	next()	Returns the next map entry object.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Details

AbstractWTEntryChunkedIterator

public AbstractWTEntryChunkedIterator(WTKeyedMap map,
 int chunkSize,
 Class<? extends Persistable> keyFilter,
 boolean includeSubclasses)

Construct a new WTEntryChunkedIterator for map entries with filtered keys.

This iterator can only be used in the method server.

Supported API: true

Parameters:

map - WTKeyedMap with deflated key references.

chunkSize - Number of entries that are inflated in a chunk.

keyFilter - Key class filter.

includeSubclasses - True to iterated over the key filter objects and all of its sub-classes, or false to iterated over only the key filter objects.

Method Details

close

public void close()

Deflate references and clear chunk collections. Called automatically if iterator is a resource in a try-with-resources block.

Supported API: true

Specified by:

close in interface AutoCloseable

hasNext

public boolean hasNext()

Supported API: true

Specified by:

hasNext in interface Iterator<E extends WTKeyedMap.WTEntry>

Throws:

WTRuntimeException

next

public E next()

Returns the next map entry object. References will be inflated and deflated in chunks within next() calls.

Supported API: true

Specified by:

next in interface Iterator<E extends WTKeyedMap.WTEntry>

Throws:

NoSuchElementException