org.treetank.bucket

Class DataBucket

java.lang.Object

org.treetank.bucket.DataBucket

All Implemented Interfaces:

IBucket

public final class DataBucket
extends Object
implements IBucket

DataBucket

A data bucket stores a set of datas.

Author:

Sebastian Graf, University of Konstanz, Marc Kramis, University of Konstanz

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DataBucket.DeletedData Static class to mark deleted entries within the bucket.

Constructor Summary

Constructors

Constructor and Description
DataBucket(long pBucketKey, long pLastBucketKey) Create data bucket.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj)
long	getBucketKey() Getting the key of a bucket for dereferencing over any pointers as well, the access in the log and for retrieving buckets from the persistent storage.
IData	getData(int pOffset) Get data at a given offset.
IData[]	getDatas() Getter for datas
long	getLastBucketPointer() Getting the pointer to the former representation of the same data-bucket.
int	hashCode()
com.google.common.hash.HashCode	secureHash() Getting a secure hash for a bucket.
void	serialize(DataOutput pOutput) Serializing to given dataput
void	setData(int pOffset, IData pData) Overwrite a single data at a given offset.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DataBucket

public DataBucket(long pBucketKey,
          long pLastBucketKey)

Create data bucket.

Parameters:

pBucketKey - Base key assigned to this data bucket.

Method Detail

getBucketKey

public long getBucketKey()

Getting the key of a bucket for dereferencing over any pointers as well, the access in the log and for retrieving buckets from the persistent storage.

Specified by:

getBucketKey in interface IBucket

Returns:

the key of the bucket

getLastBucketPointer

public long getLastBucketPointer()

Getting the pointer to the former representation of the same data-bucket.

Returns:

the pointer to the last bucket.

getData

public IData getData(int pOffset)

Get data at a given offset.

Parameters:

pOffset - Offset of data within local data bucket.

Returns:

data at given offset.

setData

public void setData(int pOffset,
           IData pData)

Overwrite a single data at a given offset.

Parameters:

pOffset - Offset of data to overwrite in this data bucket.

pData - Data to store at given dataofffset.

getDatas

public IData[] getDatas()

Getter for datas

Returns:

the mDatas

serialize

public void serialize(DataOutput pOutput)
               throws TTIOException

Serializing to given dataput

Specified by:

serialize in interface IBucket

Parameters:

pOutput - to serialize to

Throws:

TTIOException

toString

public String toString()

Overrides:

toString in class Object

secureHash

public com.google.common.hash.HashCode secureHash()

Getting a secure hash for a bucket.

Specified by:

secureHash in interface IBucket

Returns:

the bytes representing a secure hash

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object