DSRG.VKB
Interface VKB_MKB

public abstract interface VKB_MKB

This is a interface between VKB and MKB. It defines all the methods between VKB and MKB.

They are:

• Get one IS from MKB by name
• Get one Relation from MKB by name
• Get one Attribute from MKB by name
• Check if one IS exists
• Check if one Relation exists
• Check if one Attribute exists

Method Summary

void	changeAttributeName(java.lang.String IS_name, java.lang.String rel_name, java.lang.String attr_name, java.lang.String new_name) Change a specific Attribute name.
void	changeRelationName(java.lang.String IS_name, java.lang.String Rel_name, java.lang.String new_name) Change a specific Relation name.
java.util.Vector	findPOC(Relation rel, java.util.Vector atleast, int ve) Find POC PC constraint Pi(upperline{B}(S)) phi Pi(upperline{A}(R))
Attribute	getAttribute(java.lang.String IS_name, java.lang.String rel_name, java.lang.String attr_name) Get a specific Attribute
Relation	getRelation(java.lang.String IS_name, java.lang.String rel_name) Get a specific Relation.

Method Detail

getRelation

public Relation getRelation(java.lang.String IS_name,
                            java.lang.String rel_name)

Get a specific Relation.

Parameters:

rel_name - relation name "R"

IS_name - Information source name "IS"

getAttribute

public Attribute getAttribute(java.lang.String IS_name,
                              java.lang.String rel_name,
                              java.lang.String attr_name)

Get a specific Attribute

Parameters:

attr_name - attribute name "A"

rel_name - relation name "R"

IS_name - Information source name "IS"

changeAttributeName

public void changeAttributeName(java.lang.String IS_name,
                                java.lang.String rel_name,
                                java.lang.String attr_name,
                                java.lang.String new_name)

Change a specific Attribute name. from "IS.R.A" to "IS.R.B"

Parameters:

attr_name - attribute name "A"

rel_name - relation name "R"

IS_name - Information source name "IS"

new_name - new attribute name "B"

changeRelationName

public void changeRelationName(java.lang.String IS_name,
                               java.lang.String Rel_name,
                               java.lang.String new_name)

Change a specific Relation name. from "IS.R" to "IS.S"

Parameters:

IS_name - Information Source Name

Rel_name - Relation Name

new_name - New Relation Name

findPOC

public java.util.Vector findPOC(Relation rel,
                                java.util.Vector atleast,
                                int ve)

Find POC PC constraint Pi(upperline{B}(S)) phi Pi(upperline{A}(R))

Parameters:

rel - Relation R

atleast - subset of upperline{A}

ve - View Extent Parameter

Returns:

Vector of replacement.