org.mapdb

Class DB.BTreeMapMaker

java.lang.Object

org.mapdb.DB.BTreeMapMaker

Enclosing class:

DB

public static class DB.BTreeMapMaker
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	closeEngine
protected boolean	counter
protected DB	db
protected Executor	executor
protected String	name
protected int	nodeSize
protected boolean	pumpIgnoreDuplicates
protected Fun.Function1	pumpKeyExtractor
protected int	pumpPresortBatchSize
protected Iterator	pumpSource
protected Fun.Function1	pumpValueExtractor
protected Serializer<?>	valueSerializer
protected boolean	valuesOutsideNodes

Constructor Summary

Constructors

Modifier	Constructor and Description
	DB.BTreeMapMaker(String name)
protected	DB.BTreeMapMaker(String name, DB db)

Method Summary

Methods

Modifier and Type	Method and Description
protected DB.BTreeMapMaker	closeEngine()
DB.BTreeMapMaker	comparator(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.
protected BTreeKeySerializer	getKeySerializer()
DB.BTreeMapMaker	keySerializer(BTreeKeySerializer<?,?> keySerializer) keySerializer used to convert keys into/from binary form.
DB.BTreeMapMaker	keySerializer(Serializer<?> serializer) keySerializer used to convert keys into/from binary form.
DB.BTreeMapMaker	keySerializer(Serializer<?> serializer, Comparator<?> comparator) keySerializer used to convert keys into/from binary form.
DB.BTreeMapMaker	keySerializerWrap(Serializer<?> serializer) Deprecated. compatibility with 1.0
<K,V> BTreeMap<K,V>	make()
<V> BTreeMap<Long,V>	makeLongMap() Deprecated. MapDB 1.0 compat, will be removed in 2.1
<K,V> BTreeMap<K,V>	makeOrGet()
<V> BTreeMap<String,V>	makeStringMap() Deprecated. MapDB 1.0 compat, will be removed in 2.1
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 iterator contains an duplicate key, exception is thrown.
DB.BTreeMapMaker	pumpPresort(int batchSize)
<K,V> DB.BTreeMapMaker	pumpSource(Iterator<Fun.Pair<K,V>> entriesSource)
<K,V> DB.BTreeMapMaker	pumpSource(Iterator<K> keysSource, Fun.Function1<V,K> valueExtractor)
DB.BTreeMapMaker	pumpSource(NavigableMap m)
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 String name

db

protected final DB db

nodeSize

protected int nodeSize

valuesOutsideNodes

protected boolean valuesOutsideNodes

counter

protected boolean counter

valueSerializer

protected Serializer<?> valueSerializer

pumpSource

protected Iterator pumpSource

pumpKeyExtractor

protected Fun.Function1 pumpKeyExtractor

pumpValueExtractor

protected Fun.Function1 pumpValueExtractor

pumpPresortBatchSize

protected int pumpPresortBatchSize

pumpIgnoreDuplicates

protected boolean pumpIgnoreDuplicates

closeEngine

protected boolean closeEngine

executor

protected Executor executor

Constructor Detail

DB.BTreeMapMaker

public DB.BTreeMapMaker(String name)

DB.BTreeMapMaker

protected DB.BTreeMapMaker(String name,
                DB db)

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.

keySerializer

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

keySerializer used to convert keys into/from binary form.

keySerializer

public DB.BTreeMapMaker keySerializer(Serializer<?> serializer,
                             Comparator<?> comparator)

keySerializer used to convert keys into/from binary form.

keySerializerWrap

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

Deprecated. compatibility with 1.0

valueSerializer

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

valueSerializer used to convert values into/from binary form.

comparator

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

comparator used to sort keys.

pumpSource

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

pumpSource

public <K,V> DB.BTreeMapMaker pumpSource(Iterator<Fun.Pair<K,V>> entriesSource)

pumpSource

public DB.BTreeMapMaker pumpSource(NavigableMap m)

pumpPresort

public DB.BTreeMapMaker pumpPresort(int batchSize)

pumpIgnoreDuplicates

public <K> DB.BTreeMapMaker pumpIgnoreDuplicates()

If source iterator 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()

getKeySerializer

protected BTreeKeySerializer getKeySerializer()

makeStringMap

public <V> BTreeMap<String,V> makeStringMap()

Deprecated. MapDB 1.0 compat, will be removed in 2.1

creates map optimized for using String keys

makeLongMap

public <V> BTreeMap<Long,V> makeLongMap()

Deprecated. MapDB 1.0 compat, will be removed in 2.1

creates map optimized for using zero or positive Long keys

closeEngine

protected DB.BTreeMapMaker closeEngine()