com.bigdata.service

Class TxId2CommitTimeIndex.TupleSerializer

java.lang.Object

com.bigdata.btree.DefaultTupleSerializer<Long,ITxState0>

com.bigdata.service.TxId2CommitTimeIndex.TupleSerializer

All Implemented Interfaces:

ITupleSerializer<Long,ITxState0>, IKeyBuilderFactory, Externalizable, Serializable

Enclosing class:

TxId2CommitTimeIndex

protected static class TxId2CommitTimeIndex.TupleSerializer
extends DefaultTupleSerializer<Long,ITxState0>

Encapsulates key and value formation.

Author:

Bryan Thompson

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TxId2CommitTimeIndex.TupleSerializer() De-serialization ctor.
TxId2CommitTimeIndex.TupleSerializer(IKeyBuilderFactory keyBuilderFactory) Ctor when creating a new instance.

Method Summary

Methods

Modifier and Type	Method and Description
ITxState0	deserialize(ITuple tuple) Decodes the value as a commit time.
Long	deserializeKey(ITuple tuple) Decodes the key as a transaction identifier.
void	readExternal(ObjectInput in)
byte[]	serializeKey(Object obj) Serialize a facet of an object's state that places the object into the total sort order for the index.
byte[]	serializeVal(ITxState0 val) Serializes the object as a byte[] using Java default serialization.
void	writeExternal(ObjectOutput out)

Methods inherited from class com.bigdata.btree.DefaultTupleSerializer

getDefaultKeyBuilderFactory, getDefaultLeafKeysCoder, getDefaultValuesCoder, getKeyBuilder, getLeafKeysCoder, getLeafValuesCoder, getPrimaryKeyBuilder, newInstance, setLeafKeysCoder, setLeafValuesCoder, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

TxId2CommitTimeIndex.TupleSerializer

public TxId2CommitTimeIndex.TupleSerializer()

De-serialization ctor.

TxId2CommitTimeIndex.TupleSerializer

public TxId2CommitTimeIndex.TupleSerializer(IKeyBuilderFactory keyBuilderFactory)

Ctor when creating a new instance.

Parameters:

keyBuilderFactory -

Method Detail

serializeKey

public byte[] serializeKey(Object obj)

Description copied from interface: ITupleSerializer

Serialize a facet of an object's state that places the object into the total sort order for the index. This method is automatically applied by IAutoboxBTree.insert(Object, Object) and friends to convert the key object into an unsigned variable length byte[].

Note: This handles the conversion between an object and the unsigned variable length byte[] representation of that object which determines its place within the total index order. Since this transform imposes the total order of the index, different techniques are applied here than are applied to the serialization of the index values.

Specified by:

serializeKey in interface ITupleSerializer<Long,ITxState0>

Overrides:

serializeKey in class DefaultTupleSerializer<Long,ITxState0>

Parameters:

obj - A object (MAY NOT be null).

Returns:

An unsigned byte[] which places the object into the total sort order for the index and never null ( null keys are not allowed into an index).

deserializeKey

public Long deserializeKey(ITuple tuple)

Decodes the key as a transaction identifier.

Specified by:

deserializeKey in interface ITupleSerializer<Long,ITxState0>

Overrides:

deserializeKey in class DefaultTupleSerializer<Long,ITxState0>

deserialize

public ITxState0 deserialize(ITuple tuple)

Decodes the value as a commit time.

Specified by:

deserialize in interface ITupleSerializer<Long,ITxState0>

Overrides:

deserialize in class DefaultTupleSerializer<Long,ITxState0>

Parameters:

tuple - The tuple.

Returns:

The de-serialized object.

serializeVal

public byte[] serializeVal(ITxState0 val)

Description copied from class: DefaultTupleSerializer

Serializes the object as a byte[] using Java default serialization.

Specified by:

serializeVal in interface ITupleSerializer<Long,ITxState0>

Overrides:

serializeVal in class DefaultTupleSerializer<Long,ITxState0>

Parameters:

val - The object to be serialized (MAY be null).

Returns:

The serialized representation of the object as a byte[] -or- null if the reference is null.

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class DefaultTupleSerializer<Long,ITxState0>

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class DefaultTupleSerializer<Long,ITxState0>

Throws:

IOException