org.mapdb
Class DB.BTreeSetMaker

java.lang.Object
  org.mapdb.DB.BTreeSetMaker

Enclosing class:

DB

public class DB.BTreeSetMaker
extends Object

Field Summary

protected Comparator<?>	comparator
protected boolean	counter
protected String	name
protected int	nodeSize
protected boolean	pumpIgnoreDuplicates
protected int	pumpPresortBatchSize
protected Iterator<?>	pumpSource
protected BTreeKeySerializer<?>	serializer

Constructor Summary

DB.BTreeSetMaker(String name)

Method Summary

DB.BTreeSetMaker	comparator(Comparator<?> comparator) comparator used to sort keys.
DB.BTreeSetMaker	counterEnable() by default collection does not have counter, without counter updates are faster, but entire collection needs to be traversed to count items.
<K> NavigableSet<K>	make()
NavigableSet<Long>	makeLongSet() creates set optimized for using zero or positive `Long`
<K> NavigableSet<K>	makeOrGet()
NavigableSet<String>	makeStringSet() creates set optimized for using `String`
DB.BTreeSetMaker	nodeSize(int nodeSize) nodeSize maximal size of node, larger node causes overflow and creation of new BTree node.
<K> DB.BTreeSetMaker	pumpIgnoreDuplicates() If source iteretor contains an duplicate key, exception is thrown.
DB.BTreeSetMaker	pumpPresort(int batchSize)
DB.BTreeSetMaker	pumpSource(Iterator<?> source)
DB.BTreeSetMaker	serializer(BTreeKeySerializer<?> serializer) keySerializer used to convert keys into/from binary form.

Methods inherited from class java.lang.Object

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

Field Detail

name

protected final String name

nodeSize

protected int nodeSize

counter

protected boolean counter

serializer

protected BTreeKeySerializer<?> serializer

comparator

protected Comparator<?> comparator

pumpSource

protected Iterator<?> pumpSource

pumpPresortBatchSize

protected int pumpPresortBatchSize

pumpIgnoreDuplicates

protected boolean pumpIgnoreDuplicates

Constructor Detail

DB.BTreeSetMaker

public DB.BTreeSetMaker(String name)

Method Detail

nodeSize

public DB.BTreeSetMaker nodeSize(int nodeSize)

nodeSize maximal size of node, larger node causes overflow and creation of new BTree node. Use large number for small keys, use small number for large keys.

counterEnable

public DB.BTreeSetMaker counterEnable()

by default collection does not have counter, without counter updates are faster, but entire collection needs to be traversed to count items.

serializer

public DB.BTreeSetMaker serializer(BTreeKeySerializer<?> serializer)

keySerializer used to convert keys into/from binary form.

comparator

public DB.BTreeSetMaker comparator(Comparator<?> comparator)

comparator used to sort keys.

pumpSource

public DB.BTreeSetMaker pumpSource(Iterator<?> source)

pumpIgnoreDuplicates

public <K> DB.BTreeSetMaker pumpIgnoreDuplicates()

If source iteretor contains an duplicate key, exception is thrown. This options will only use firts key and ignore any consequentive duplicates.

pumpPresort

public DB.BTreeSetMaker pumpPresort(int batchSize)

make

public <K> NavigableSet<K> make()

makeOrGet

public <K> NavigableSet<K> makeOrGet()

makeStringSet

public NavigableSet<String> makeStringSet()

creates set optimized for using `String`

makeLongSet

public NavigableSet<Long> makeLongSet()

creates set optimized for using zero or positive `Long`