org.mapdb

Class DB.BTreeMapMaker

java.lang.Object

org.mapdb.DB.BTreeMapMaker

Enclosing class:

DB

public class DB.BTreeMapMaker
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Comparator	comparator
protected boolean	counter
protected BTreeKeySerializer	keySerializer
protected java.lang.String	name
protected int	nodeSize
protected boolean	pumpIgnoreDuplicates
protected Fun.Function1	pumpKeyExtractor
protected int	pumpPresortBatchSize
protected java.util.Iterator	pumpSource
protected Fun.Function1	pumpValueExtractor
protected Serializer	valueSerializer
protected boolean	valuesOutsideNodes

Constructor Summary

Constructors

Constructor and Description
BTreeMapMaker(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
DB.BTreeMapMaker	comparator(java.util.Comparator<?> comparator) comparator used to sort keys.
DB.BTreeMapMaker	counterEnable() by default collection does not have counter, without counter updates are faster, but entire collection needs to be traversed to count items.
DB.BTreeMapMaker	keySerializer(BTreeKeySerializer<?> keySerializer) keySerializer used to convert keys into/from binary form.
DB.BTreeMapMaker	keySerializerWrap(Serializer<?> serializer) keySerializer used to convert keys into/from binary form.
<K,V> BTreeMap<K,V>	make()
<V> BTreeMap<java.lang.Long,V>	makeLongMap() creates map optimized for using zero or positive `Long` keys
<K,V> BTreeMap<K,V>	makeOrGet()
<V> BTreeMap<java.lang.String,V>	makeStringMap() creates map optimized for using `String` keys
DB.BTreeMapMaker	nodeSize(int nodeSize) nodeSize maximal size of node, larger node causes overflow and creation of new BTree node.
<K> DB.BTreeMapMaker	pumpIgnoreDuplicates() If source iteretor contains an duplicate key, exception is thrown.
DB.BTreeMapMaker	pumpPresort(int batchSize)
<K,V> DB.BTreeMapMaker	pumpSource(java.util.Iterator<Fun.Tuple2<K,V>> entriesSource)
<K,V> DB.BTreeMapMaker	pumpSource(java.util.Iterator<K> keysSource, Fun.Function1<V,K> valueExtractor)
DB.BTreeMapMaker	valueSerializer(Serializer<?> valueSerializer) valueSerializer used to convert values into/from binary form.
DB.BTreeMapMaker	valuesOutsideNodesEnable() by default values are stored inside BTree Nodes.

Methods inherited from class java.lang.Object

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

Field Detail

name

protected final java.lang.String name

nodeSize

protected int nodeSize

valuesOutsideNodes

protected boolean valuesOutsideNodes

counter

protected boolean counter

keySerializer

protected BTreeKeySerializer keySerializer

valueSerializer

protected Serializer valueSerializer

comparator

protected java.util.Comparator comparator

pumpSource

protected java.util.Iterator pumpSource

pumpKeyExtractor

protected Fun.Function1 pumpKeyExtractor

pumpValueExtractor

protected Fun.Function1 pumpValueExtractor

pumpPresortBatchSize

protected int pumpPresortBatchSize

pumpIgnoreDuplicates

protected boolean pumpIgnoreDuplicates

Constructor Detail

BTreeMapMaker

public BTreeMapMaker(java.lang.String name)

Method Detail

nodeSize

public DB.BTreeMapMaker 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.

valuesOutsideNodesEnable

public DB.BTreeMapMaker valuesOutsideNodesEnable()

by default values are stored inside BTree Nodes. Large values should be stored outside of BTreeNodes

counterEnable

public DB.BTreeMapMaker counterEnable()

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

keySerializer

public DB.BTreeMapMaker keySerializer(BTreeKeySerializer<?> keySerializer)

keySerializer used to convert keys into/from binary form.

keySerializerWrap

public DB.BTreeMapMaker keySerializerWrap(Serializer<?> serializer)

keySerializer used to convert keys into/from binary form. This wraps ordinary serializer, with no delta packing used

valueSerializer

public DB.BTreeMapMaker valueSerializer(Serializer<?> valueSerializer)

valueSerializer used to convert values into/from binary form.

comparator

public DB.BTreeMapMaker comparator(java.util.Comparator<?> comparator)

comparator used to sort keys.

pumpSource

public <K,V> DB.BTreeMapMaker pumpSource(java.util.Iterator<K> keysSource,
                                         Fun.Function1<V,K> valueExtractor)

pumpSource

public <K,V> DB.BTreeMapMaker pumpSource(java.util.Iterator<Fun.Tuple2<K,V>> entriesSource)

pumpPresort

public DB.BTreeMapMaker pumpPresort(int batchSize)

pumpIgnoreDuplicates

public <K> DB.BTreeMapMaker pumpIgnoreDuplicates()

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

make

public <K,V> BTreeMap<K,V> make()

makeOrGet

public <K,V> BTreeMap<K,V> makeOrGet()

makeStringMap

public <V> BTreeMap<java.lang.String,V> makeStringMap()

creates map optimized for using `String` keys

makeLongMap

public <V> BTreeMap<java.lang.Long,V> makeLongMap()

creates map optimized for using zero or positive `Long` keys