Package com.semedy.reasoner.api.edb

Class Partitioning

java.lang.Object

com.semedy.reasoner.api.edb.Partitioning

public class Partitioning
extends Object

partitioning of relations

Author:

angele

Constructor Summary

Constructors

Constructor	Description
Partitioning(ExtensionalDB extensionalDB, String predicate, List<Literal> filters, String dir)

Method Summary

Modifier and Type	Method	Description
void	addRelation(Relation R)	add a relation to the partitions
boolean	addTuple(TupleBuffer tuple, boolean add)	add or delete a tuple from the partition relation
void	clear()	clear relations and writers
void	clearWriters()	clear writers
void	close()	close output files
List<String>	getResultFiles()	return the result files created by writing tuples to partition
Relation	search4Relation(TupleBuffer tuple, boolean create)	search for corresponding relation
void	writeTuple(long[] tuple)	write tuple to output file in temp directory

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Partitioning

public Partitioning(ExtensionalDB extensionalDB,
 String predicate,
 List<Literal> filters,
 String dir)

Method Details

clear

public void clear()

clear relations and writers

clearWriters

public void clearWriters()

clear writers

addRelation

public void addRelation(Relation R)

add a relation to the partitions

Parameters:

R -

search4Relation

public Relation search4Relation(TupleBuffer tuple,
 boolean create)
                         throws IOException,
EDBException

search for corresponding relation

Parameters:

tuple -

create -

Returns:

Throws:

IOException

EDBException

addTuple

public boolean addTuple(TupleBuffer tuple,
 boolean add)
                 throws IOException,
EDBException

add or delete a tuple from the partition relation

Parameters:

tuple -

add -

Returns:

Throws:

IOException

EDBException

writeTuple

public void writeTuple(long[] tuple)
                throws IOException

write tuple to output file in temp directory

Parameters:

tuple -

Throws:

IOException

getResultFiles

public List<String> getResultFiles()

return the result files created by writing tuples to partition

Returns:

close

public void close()
           throws IOException

close output files

Throws:

IOException