anonymizer
Class EquivalenceTable

java.lang.Object
  anonymizer.EquivalenceTable

public class EquivalenceTable
extends java.lang.Object

The class that manages equivalence classes. Typical schema of the table contains:

• eid: equivalence identifier
• generalized quasi-identifier attribute values (vector of intervals, one for each qi-attribute)

Field Summary

private QIDAttribute[]	qid Quasi-identifier attributes
private SQLWrapper	sqlwrapper SQL connection/querying object
private java.lang.String	tableName Name of the table

Constructor Summary

EquivalenceTable(QIDAttribute[] qid, java.lang.String tableName)
Class constructor

Method Summary

private void	createTable() Creates the table that will store Equivalence objects
void	deleteEquivalence(java.lang.Long eid) Deletes the equivalence
void	drop() Drops this table from the database
java.lang.Long	getEID(java.lang.String[] genVals) Get the equivalence ID for the provided set of generalized values
java.lang.String[]	getGeneralization(double eid) Get the generalization for an equivalence
java.lang.String	getName() Getter for tableName
java.lang.Long	insertEquivalence(java.lang.String[] genVals) Inserts a new equivalence
java.lang.Long	insertTuple(java.lang.String[] vals) Inserts a nwe tuple
void	setGeneralization(double eid, java.lang.String[] newVals) Overwrites the generalized values of this equivalence with the specified set of values

Methods inherited from class java.lang.Object

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

Field Detail

qid

private QIDAttribute[] qid

Quasi-identifier attributes

tableName

private java.lang.String tableName

Name of the table

sqlwrapper

private SQLWrapper sqlwrapper

SQL connection/querying object

Constructor Detail

EquivalenceTable

public EquivalenceTable(QIDAttribute[] qid,
                        java.lang.String tableName)

Class constructor

Parameters:

qid - Quasi-identifier attribtues

tableName - Name of the table

Method Detail

createTable

private void createTable()

Creates the table that will store Equivalence objects

getName

public java.lang.String getName()

Getter for tableName

Returns:

Name of the table

getEID

public java.lang.Long getEID(java.lang.String[] genVals)
                      throws java.sql.SQLException

Get the equivalence ID for the provided set of generalized values

Parameters:

genVals - String representations of Interval objects (one per QI-attribute)

Returns:

EID of the matching equivalence or -1 if not found

Throws:

java.sql.SQLException

getGeneralization

public java.lang.String[] getGeneralization(double eid)
                                     throws java.sql.SQLException

Get the generalization for an equivalence

Parameters:

eid - Equivalence ID of the equivalence

Returns:

an array of generalized values (i.e., string representation of the intervals)

Throws:

java.sql.SQLException

setGeneralization

public void setGeneralization(double eid,
                              java.lang.String[] newVals)
                       throws java.sql.SQLException

Overwrites the generalized values of this equivalence with the specified set of values

Parameters:

eid - Equivalence id of the equivalence

newVals - new generalization values

Throws:

java.sql.SQLException

insertTuple

public java.lang.Long insertTuple(java.lang.String[] vals)
                           throws java.lang.Exception

Inserts a nwe tuple

Parameters:

vals - Values of the tuple, as read from the data source (i.e., before any generalization)

Returns:

Equivalence id of the new or existing equivalence

Throws:

java.lang.Exception

insertEquivalence

public java.lang.Long insertEquivalence(java.lang.String[] genVals)
                                 throws java.sql.SQLException

Inserts a new equivalence

Parameters:

genVals - String representation of generalized values (i.e., generated with Interval.toString)

Returns:

Equivalence id of the new or existing equivalence

Throws:

SQLExpcetion

java.sql.SQLException

deleteEquivalence

public void deleteEquivalence(java.lang.Long eid)

Deletes the equivalence

Parameters:

eid - Equivalence ID of the equivalence to be deleted

drop

public void drop()

Drops this table from the database