org.treetank.bucket

Class MetaBucket

java.lang.Object

org.treetank.bucket.MetaBucket

All Implemented Interfaces:

IBucket

public final class MetaBucket
extends Object
implements IBucket

MetaBucket

This bucket stored variable key -> value mappings, whereas elements must implement the IMetaEntrys.

Author:

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

Constructor Summary

Constructors

Constructor and Description
MetaBucket(long pBucketKey) Create name bucket.

Method Summary

Methods

Modifier and Type	Method and Description
Set<Map.Entry<IMetaEntry,IMetaEntry>>	entrySet() Getting the entry set of the bucket.
boolean	equals(Object obj)
IMetaEntry	get(IMetaEntry pKey) Getting an entry.
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.
int	hashCode()
IMetaEntry	put(IMetaEntry pKey, IMetaEntry pVal) Putting an entry to the map.
IMetaEntry	remove(IMetaEntry pKey) Removing an element within this bucket
com.google.common.hash.HashCode	secureHash() Getting a secure hash for a bucket.
void	serialize(DataOutput pOutput) Serializing to given dataput
int	size() Getting the size.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

MetaBucket

public MetaBucket(long pBucketKey)

Create name bucket.

Parameters:

pBucketKey - key of this bucket

Method Detail

put

public IMetaEntry put(IMetaEntry pKey,
             IMetaEntry pVal)

Putting an entry to the map.

Parameters:

pKey - to be stored.

pVal - to be stored.

Returns:

if entry already existing, return that one.

See Also:

ConcurrentHashMap.put(Object, Object)

get

public IMetaEntry get(IMetaEntry pKey)

Getting an entry.

Parameters:

pKey - to be retrieved

Returns:

the suitable value, if present. Null otherwise

See Also:

ConcurrentHashMap.get(Object)

size

public int size()

Getting the size.

Returns:

the number of entries in this bucket

See Also:

ConcurrentHashMap.size()

entrySet

public Set<Map.Entry<IMetaEntry,IMetaEntry>> entrySet()

Getting the entry set of the bucket.

Returns:

the entry set of this bucket

See Also:

ConcurrentHashMap.entrySet()

remove

public IMetaEntry remove(IMetaEntry pKey)

Removing an element within this bucket

Parameters:

pKey - to be removed

Returns:

the element removed, null otherwise

See Also:

ConcurrentHashMap.remove(Object)

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

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

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals 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