org.mapdb
Class BTreeKeySerializer.Tuple6KeySerializer<A,B,C,D,E,F>

java.lang.Object
  org.mapdb.BTreeKeySerializer<Fun.Tuple6<A,B,C,D,E,F>>
      org.mapdb.BTreeKeySerializer.Tuple6KeySerializer<A,B,C,D,E,F>

Type Parameters:

A - first tuple value

B - second tuple value

C - third tuple value

All Implemented Interfaces:

Serializable

Enclosing class:

BTreeKeySerializer<K>

public static class BTreeKeySerializer.Tuple6KeySerializer<A,B,C,D,E,F>
extends BTreeKeySerializer<Fun.Tuple6<A,B,C,D,E,F>>
implements Serializable

Applies delta compression on array of tuple. First, second and third tuple value may be shared between consequential tuples, so only first occurrence is serialized. An example:

     Value                Serialized as
     ----------------------------------
     Tuple(1, 2, 1, 1)       1, 2, 1, 1
     Tuple(1, 2, 1, 2)                2
     Tuple(1, 3, 3, 3)          3, 3, 3
     Tuple(1, 3, 4, 4)             4, 4
 

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.mapdb.BTreeKeySerializer

BTreeKeySerializer.BasicKeySerializer, BTreeKeySerializer.Tuple2KeySerializer<A,B>, BTreeKeySerializer.Tuple3KeySerializer<A,B,C>, BTreeKeySerializer.Tuple4KeySerializer<A,B,C,D>, BTreeKeySerializer.Tuple5KeySerializer<A,B,C,D,E>, BTreeKeySerializer.Tuple6KeySerializer<A,B,C,D,E,F>

Field Summary

protected Comparator<A>	aComparator
protected Serializer<A>	aSerializer
protected Comparator<B>	bComparator
protected Serializer<B>	bSerializer
protected Comparator<C>	cComparator
protected Serializer<C>	cSerializer
protected Comparator<D>	dComparator
protected Serializer<D>	dSerializer
protected Comparator<E>	eComparator
protected Serializer<E>	eSerializer
protected Serializer<F>	fSerializer

Fields inherited from class org.mapdb.BTreeKeySerializer

BASIC, STRING, TUPLE2, TUPLE3, TUPLE4, ZERO_OR_POSITIVE_INT, ZERO_OR_POSITIVE_LONG

Constructor Summary

BTreeKeySerializer.Tuple6KeySerializer(Comparator<A> aComparator, Comparator<B> bComparator, Comparator<C> cComparator, Comparator<D> dComparator, Comparator<E> eComparator, Serializer<A> aSerializer, Serializer<B> bSerializer, Serializer<C> cSerializer, Serializer<D> dSerializer, Serializer<E> eSerializer, Serializer<F> fSerializer)
Construct new Tuple4 Key Serializer.

Method Summary

Object[]	deserialize(DataInput in, int start, int end, int size) Deserializes keys for single BTree Node.
boolean	equals(Object o)
Comparator<Fun.Tuple6<A,B,C,D,E,F>>	getComparator() Some key serializers may only work with they own comparators.
int	hashCode()
void	serialize(DataOutput out, int start, int end, Object[] keys) Serialize keys from single BTree Node.

Methods inherited from class org.mapdb.BTreeKeySerializer

leadingValuePackRead, leadingValuePackWrite

Methods inherited from class java.lang.Object

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

Field Detail

aComparator

protected final Comparator<A> aComparator

bComparator

protected final Comparator<B> bComparator

cComparator

protected final Comparator<C> cComparator

dComparator

protected final Comparator<D> dComparator

eComparator

protected final Comparator<E> eComparator

aSerializer

protected final Serializer<A> aSerializer

bSerializer

protected final Serializer<B> bSerializer

cSerializer

protected final Serializer<C> cSerializer

dSerializer

protected final Serializer<D> dSerializer

eSerializer

protected final Serializer<E> eSerializer

fSerializer

protected final Serializer<F> fSerializer

Constructor Detail

BTreeKeySerializer.Tuple6KeySerializer

public BTreeKeySerializer.Tuple6KeySerializer(Comparator<A> aComparator,
                                              Comparator<B> bComparator,
                                              Comparator<C> cComparator,
                                              Comparator<D> dComparator,
                                              Comparator<E> eComparator,
                                              Serializer<A> aSerializer,
                                              Serializer<B> bSerializer,
                                              Serializer<C> cSerializer,
                                              Serializer<D> dSerializer,
                                              Serializer<E> eSerializer,
                                              Serializer<F> fSerializer)

Construct new Tuple4 Key Serializer. You may pass null for some value, In that case 'default' value will be used, Comparable comparator and Default Serializer from DB.

Method Detail

serialize

public void serialize(DataOutput out,
                      int start,
                      int end,
                      Object[] keys)
               throws IOException

Description copied from class: BTreeKeySerializer

Serialize keys from single BTree Node.

Specified by:

serialize in class BTreeKeySerializer<Fun.Tuple6<A,B,C,D,E,F>>

Parameters:

out - output stream where to put ata

start - where data start in array. Before this index all keys are null

end - where data ends in array (exclusive). From this index all keys are null

keys - array of keys for single BTree Node

Throws:

IOException

deserialize

public Object[] deserialize(DataInput in,
                            int start,
                            int end,
                            int size)
                     throws IOException

Description copied from class: BTreeKeySerializer

Deserializes keys for single BTree Node. To

Specified by:

deserialize in class BTreeKeySerializer<Fun.Tuple6<A,B,C,D,E,F>>

Parameters:

in - input stream to read data from

start - where data start in array. Before this index all keys are null

end - where data ends in array (exclusive). From this index all keys are null

size - size of array which should be returned

Returns:

array of keys for single BTree Node

Throws:

IOException

getComparator

public Comparator<Fun.Tuple6<A,B,C,D,E,F>> getComparator()

Description copied from class: BTreeKeySerializer

Some key serializers may only work with they own comparators. For example delta-packing stores increments between numbers and requires ascending order. So Key Serializer may provide its own comparator.

Specified by:

getComparator in class BTreeKeySerializer<Fun.Tuple6<A,B,C,D,E,F>>

Returns:

comparator which must be used with this method. `null` if comparator is not strictly required.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object