spo.src.SPDB.DocumentImpl
Class Relation

java.lang.Object
  |
  +--spo.src.SPDB.DocumentImpl.Relation

public class Relation

extends java.lang.Object

A class that represents a set of SPOs

Field Summary

(package private) DBUtil	dbutil
(package private) static int	MAX_SPO_NUMBER
(package private) java.lang.String	name
(package private) int	rid
(package private) java.lang.String	schemaURL
(package private) int	size
(package private) java.util.Vector	spos

Constructor Summary

Relation(DBUtil dbutil)
Initialize an instance for the class

Relation(java.lang.String name, DBUtil dbutil)
Initialize an instance for the class

Relation(java.lang.String name, java.lang.String schemaURL, DBUtil dbutil)
Initialize an instance for the class

Relation(java.lang.String name, java.util.Vector spos, DBUtil dbutil)
Initialize an instance for the class

Method Summary

void	conditionalize(java.util.ArrayList query) Conditionalize SPOs from the relation by Table
int	create() Create the relation
void	delete(java.lang.String[] where) Delete SPOs which satisfy the condition
int	drop() Drop the relation
boolean	getInitialized()
java.lang.String	getName()
java.lang.String	getNames() Get names of the relations in the database
int	getRID()
java.lang.String	getSchema() Get the schema name of the current relation
java.lang.String	getSchemaURL()
int	getSize()
java.util.Vector	getSPOs()
void	insert() Insert the relation into database
void	join(Relation relation) Left Join with another relation
void	product(Relation relation) Cartesian product with another relation
void	project(java.util.ArrayList query) Project SPOs from the relation
void	projectAll() new methods start here.
void	projectOnCONS(java.lang.String[] subquery, java.lang.String type) Project SPOs from the relation by CONS
void	projectOnVAR(java.lang.String[] subquery) Project SPOs from the relation by VAR
void	reset(org.w3c.dom.NodeList spoList, int ith)
void	select(java.util.ArrayList query) Select SPOs from the relation
void	selectAll() Select all the SPOs in the relation
void	selectOnCONS(java.lang.String[] subquery, java.lang.String type) Select SPOs from the relation by CONS
void	selectOnProbability(java.lang.String[] subquery) Select SPOs from the relation by Probability
void	selectOnTable(java.lang.String[] subquery) Select SPOs from the relation by Table
void	selectOnVAR(java.lang.String[] subquery) Select SPOs from the relation by VAR
void	set(org.w3c.dom.NodeList spoList) Initialize an instance for the class
void	setInitialized(boolean init)
void	setName(java.lang.String name)
void	setRID(int rid)
void	setSchemaURL(java.lang.String schema)
void	setSize(int size)
void	setSPOs(java.util.Vector spos)
java.lang.String	toXML() Transform a relation object to XML

Methods inherited from class java.lang.Object

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

Field Detail

rid

int rid

size

int size

name

java.lang.String name

schemaURL

java.lang.String schemaURL

spos

java.util.Vector spos

dbutil

DBUtil dbutil

MAX_SPO_NUMBER

static final int MAX_SPO_NUMBER

See Also:

Constant Field Values

Constructor Detail

Relation

public Relation(DBUtil dbutil)

Initialize an instance for the class

Parameters:

dbutil - A DBUtil utility object

Relation

public Relation(java.lang.String name,
                DBUtil dbutil)

Initialize an instance for the class

Parameters:

name - name of the relation

dbutil - A DBUtil utility object

Relation

public Relation(java.lang.String name,
                java.lang.String schemaURL,
                DBUtil dbutil)

Initialize an instance for the class

Parameters:

name - name of the relation

schemaURL - URL name of the schema

dbutil - A DBUtil utility object

Relation

public Relation(java.lang.String name,
                java.util.Vector spos,
                DBUtil dbutil)

Initialize an instance for the class

Parameters:

name - name of the relation

spos - the SPO objects in Vector format

dbutil - A DBUtil utility object

Method Detail

set

public void set(org.w3c.dom.NodeList spoList)

Initialize an instance for the class

Parameters:

spoList - the SPO objects in XML DOM NodeList format

reset

public void reset(org.w3c.dom.NodeList spoList,
                  int ith)

getNames

public java.lang.String getNames()

Get names of the relations in the database

getSchema

public java.lang.String getSchema()

Get the schema name of the current relation

create

public int create()

Create the relation

drop

public int drop()

Drop the relation

insert

public void insert()

Insert the relation into database

delete

public void delete(java.lang.String[] where)

Delete SPOs which satisfy the condition

Parameters:

where - the condition where clause

toXML

public java.lang.String toXML()

Transform a relation object to XML

selectAll

public void selectAll()
               throws java.lang.Exception

Select all the SPOs in the relation

java.lang.Exception

select

public void select(java.util.ArrayList query)
            throws java.lang.Exception

Select SPOs from the relation

Parameters:

query - the structured query in ArrayList format

java.lang.Exception

projectAll

public void projectAll()
                throws java.lang.Exception

new methods start here. Project all the SPOs in the relation

java.lang.Exception

project

public void project(java.util.ArrayList query)
             throws java.lang.Exception

Project SPOs from the relation

Parameters:

query - the structured query in ArrayList format

java.lang.Exception

conditionalize

public void conditionalize(java.util.ArrayList query)
                    throws java.lang.Exception

Conditionalize SPOs from the relation by Table

Parameters:

query - the structured query in Hashtable format

java.lang.Exception

product

public void product(Relation relation)
             throws java.lang.Exception

Cartesian product with another relation

Parameters:

relation - right operand of the cartesian operator

java.lang.Exception

join

public void join(Relation relation)
          throws java.lang.Exception

Left Join with another relation

Parameters:

relation - right operand of the left Join operator

java.lang.Exception

selectOnCONS

public void selectOnCONS(java.lang.String[] subquery,
                         java.lang.String type)
                  throws java.lang.Exception

Select SPOs from the relation by CONS

java.lang.Exception

selectOnVAR

public void selectOnVAR(java.lang.String[] subquery)
                 throws java.lang.Exception

Select SPOs from the relation by VAR

java.lang.Exception

selectOnTable

public void selectOnTable(java.lang.String[] subquery)
                   throws java.lang.Exception

Select SPOs from the relation by Table

java.lang.Exception

selectOnProbability

public void selectOnProbability(java.lang.String[] subquery)
                         throws java.lang.Exception

Select SPOs from the relation by Probability

java.lang.Exception

projectOnCONS

public void projectOnCONS(java.lang.String[] subquery,
                          java.lang.String type)
                   throws java.lang.Exception

Project SPOs from the relation by CONS

java.lang.Exception

projectOnVAR

public void projectOnVAR(java.lang.String[] subquery)
                  throws java.lang.Exception

Project SPOs from the relation by VAR

java.lang.Exception

setRID

public void setRID(int rid)

getRID

public int getRID()

setName

public void setName(java.lang.String name)

getName

public java.lang.String getName()

setSize

public void setSize(int size)

getSize

public int getSize()

setSchemaURL

public void setSchemaURL(java.lang.String schema)

getSchemaURL

public java.lang.String getSchemaURL()

setInitialized

public void setInitialized(boolean init)

getInitialized

public boolean getInitialized()

setSPOs

public void setSPOs(java.util.Vector spos)

getSPOs

public java.util.Vector getSPOs()