org.treetank.bucket

Class RevisionRootBucket

java.lang.Object

org.treetank.bucket.RevisionRootBucket

All Implemented Interfaces:

IBucket, IReferenceBucket

public final class RevisionRootBucket
extends Object
implements IReferenceBucket

RevisionRootBucket

Revision root bucket holds a reference to the name bucket as well as the static data-bucket tree.

Author:

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

Field Summary

Fields

Modifier and Type	Field and Description
static int	META_REFERENCE_OFFSET Offset of name bucket reference.

Fields inherited from interface org.treetank.bucket.interfaces.IReferenceBucket

GUARANTEED_INDIRECT_OFFSET

Constructor Summary

Constructors

Constructor and Description
RevisionRootBucket(long pBucketKey, long pRevision, long pMaxDataKey) Constructor of RevisionRootBuckets.

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.
long	getMaxDataKey() Get last allocated data key.
byte[][]	getReferenceHashs() Getting the HashValues mapped to the references guarding the integrity of the referenced buckets.
long[]	getReferenceKeys() Getting the keys of the referenced buckets.
long	getRevision() Getting revision of this root bucket.
int	hashCode()
long	incrementMaxDataKey() Increment number of datas by one while allocating another key.
com.google.common.hash.HashCode	secureHash() Getting a secure hash for a bucket.
void	serialize(DataOutput pOutput) Serializing to given dataput
void	setReferenceHash(int pIndex, byte[] pHash) Setting the hash of a referenced bucket to this bucket.
void	setReferenceKey(int pIndex, long pKey) Setting one key of a bucket to be referenced from this bucket.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

META_REFERENCE_OFFSET

public static final int META_REFERENCE_OFFSET

Offset of name bucket reference.

See Also:

Constant Field Values

Constructor Detail

RevisionRootBucket

public RevisionRootBucket(long pBucketKey,
                  long pRevision,
                  long pMaxDataKey)

Constructor of RevisionRootBuckets.

Parameters:

pBucketKey - Key of this bucket

pRevision - to be created

pMaxDataKey - maximal data key given

Method Detail

getMaxDataKey

public long getMaxDataKey()

Get last allocated data key.

Returns:

Last allocated data key.

incrementMaxDataKey

public long incrementMaxDataKey()

Increment number of datas by one while allocating another key.

getRevision

public long getRevision()

Getting revision of this root bucket.

Returns:

current revision

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

getReferenceKeys

public long[] getReferenceKeys()

Getting the keys of the referenced buckets.

Specified by:

getReferenceKeys in interface IReferenceBucket

Returns:

the keys for the referenced buckets.

setReferenceKey

public void setReferenceKey(int pIndex,
                   long pKey)

Setting one key of a bucket to be referenced from this bucket.

Specified by:

setReferenceKey in interface IReferenceBucket

Parameters:

pIndex - offset of the key to be referenced

pKey - the key of the bucket to be referenced

toString

public String toString()

Overrides:

toString in class Object

getReferenceHashs

public byte[][] getReferenceHashs()

Getting the HashValues mapped to the references guarding the integrity of the referenced buckets.

Specified by:

getReferenceHashs in interface IReferenceBucket

Returns:

an array of checksums from the referenced buckets

setReferenceHash

public void setReferenceHash(int pIndex,
                    byte[] pHash)

Setting the hash of a referenced bucket to this bucket.

Specified by:

setReferenceHash in interface IReferenceBucket

Parameters:

pIndex - where the hash should be applied to

pHash - to be stored in

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