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java.lang.Object | +--DSRG.MKB.MKB
this is the Meta Knowledge Base main class. It hold lists of ISs, JCs and PCs as well as derived PCs and maintains the MKB under schema changes.
Field Summary | |
private static boolean |
DEBUG
|
java.util.Vector |
DerivedPC
|
java.util.Vector |
IS_List
|
java.util.Vector |
JC_List
|
java.util.Vector |
LC_List
|
private IS |
localIS
|
private VSA |
mainVSA
we need a handle to the VSA to notify it of schema changes, too. |
java.util.Vector |
PC_List
|
Constructor Summary | |
MKB()
A default constructor to create an empty MKB object. |
|
MKB(java.lang.String MKBFile)
Constructor uses the New MKB Parser. |
Method Summary | |
boolean |
addAttribute(java.lang.String ISName,
java.lang.String RName,
java.lang.String AttName,
java.lang.String AttType)
this adds an attribute as a schema change. |
boolean |
addIS(IS newIS)
Add a new IS object to this MKB. |
boolean |
addJoinConstraint(JoinConstraint theJC)
|
boolean |
addLocalCondition(LocalCondition theLC)
|
boolean |
addPCConstraint(PCConstraint thePC)
|
boolean |
addRelation(java.lang.String ISName,
java.lang.String RName,
java.util.Vector attList,
java.util.Vector typeList)
the actual capability change "addRelation". |
boolean |
changeAttributeName(java.lang.String isName,
java.lang.String relName,
java.lang.String attName,
java.lang.String newName)
Change a specific Attribute name from "IS.R.A" to "IS.R.B". |
boolean |
changeRelationName(java.lang.String isName,
java.lang.String relName,
java.lang.String newName)
|
private void |
deleteAttribute_maintainMKB(Attribute Att)
|
boolean |
deleteAttribute(java.lang.String ISName,
java.lang.String RName,
java.lang.String AttName)
|
boolean |
deleteJoinConstraint(JoinConstraint theJC)
|
boolean |
deletePCConstraint(PCConstraint thePC)
|
boolean |
deleteRelation(java.lang.String ISName,
java.lang.String RName)
the MKB capability change "deleteRelation". |
void |
displayAll()
|
Attribute |
findAttribute(java.lang.String ISName,
java.lang.String RName,
java.lang.String AttName)
return a specific attribute. |
IS |
findIS(java.lang.String ISName)
|
JoinConstraint |
findJC(java.lang.String ISName1,
java.lang.String RName1,
java.lang.String ISName2,
java.lang.String RName2)
|
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)) |
Relation |
findRelation(java.lang.String ISName,
java.lang.String RName)
|
java.util.Vector |
getAllAttributesAsStrings(java.lang.String isName,
java.lang.String relName)
|
java.util.Vector |
getAllISsAsStrings()
|
java.util.Vector |
getAllJcsForRelation(java.lang.String isName,
java.lang.String relName)
|
java.util.Vector |
getAllJcsForRelationAsStrings(java.lang.String isName,
java.lang.String relName)
|
java.util.Vector |
getAllPcsForRelation(java.lang.String isName,
java.lang.String relName)
|
java.util.Vector |
getAllPcsForRelationAsStrings(java.lang.String isName,
java.lang.String relName)
|
java.util.Vector |
getAllRelationsAsStrings(java.lang.String isName)
|
java.util.Vector |
getAllTcsForRelation(java.lang.String isName,
java.lang.String relName)
|
java.util.Vector |
getAllTcsForRelationAsStrings(java.lang.String isName,
java.lang.String relName)
returns all TypeConstraint Objects in a String representation. |
int |
getAttributeSize(java.lang.String IS,
java.lang.String relName,
java.lang.String attName)
returns the size of an attribute in bytes. |
int |
getAttributeSizeForRelation(java.lang.String IS,
java.lang.String relName)
returns the sum of the the sizes of all attributes in a relation in bytes. |
java.util.Vector |
getISs()
returns a vector is IS-objects (that are already in the MKB) |
double |
getJoinSelectivity(java.lang.String IS1,
java.lang.String relation1,
java.lang.String IS2,
java.lang.String relation2)
returns join selectivity ((R1 \join R2)/(R1 X R2)) for a pair of given relations (dummy values) |
double |
getLocalConditionSelectivity(java.lang.String IS,
java.lang.String relName,
java.lang.String attName,
java.lang.String value)
returns local selectivity for a certain local condition. |
IS |
getLocalIS()
|
long |
getRelationSize(java.lang.String ISName,
java.lang.String relationName)
returns relation size (number of tuples) for a given relation Name (dummy values) |
void |
setLocalIS(IS anIS)
|
void |
setVSA(VSA myVSA)
|
java.lang.String |
toString()
Dump this MKB object. |
private void |
update(MKB mkb)
Update MKB Object by another MKB object. |
Methods inherited from class java.lang.Object |
|
Field Detail |
private static final boolean DEBUG
private VSA mainVSA
private IS localIS
public java.util.Vector IS_List
public java.util.Vector JC_List
public java.util.Vector PC_List
public java.util.Vector LC_List
public java.util.Vector DerivedPC
Constructor Detail |
public MKB()
public MKB(java.lang.String MKBFile)
Method Detail |
private void update(MKB mkb)
public void displayAll()
public void setVSA(VSA myVSA)
public java.util.Vector getAllAttributesAsStrings(java.lang.String isName, java.lang.String relName)
public java.util.Vector getAllRelationsAsStrings(java.lang.String isName)
public java.util.Vector getAllTcsForRelationAsStrings(java.lang.String isName, java.lang.String relName)
public java.util.Vector getAllTcsForRelation(java.lang.String isName, java.lang.String relName)
public java.util.Vector getAllJcsForRelationAsStrings(java.lang.String isName, java.lang.String relName)
public java.util.Vector getAllJcsForRelation(java.lang.String isName, java.lang.String relName)
public java.util.Vector getAllPcsForRelationAsStrings(java.lang.String isName, java.lang.String relName)
public java.util.Vector getAllPcsForRelation(java.lang.String isName, java.lang.String relName)
public java.util.Vector getAllISsAsStrings()
public java.util.Vector getISs()
public boolean addIS(IS newIS)
public void setLocalIS(IS anIS)
public IS getLocalIS()
public boolean addRelation(java.lang.String ISName, java.lang.String RName, java.util.Vector attList, java.util.Vector typeList)
public boolean deleteRelation(java.lang.String ISName, java.lang.String RName)
public boolean changeRelationName(java.lang.String isName, java.lang.String relName, java.lang.String newName)
public boolean addAttribute(java.lang.String ISName, java.lang.String RName, java.lang.String AttName, java.lang.String AttType)
public boolean deleteAttribute(java.lang.String ISName, java.lang.String RName, java.lang.String AttName)
private void deleteAttribute_maintainMKB(Attribute Att)
public boolean changeAttributeName(java.lang.String isName, java.lang.String relName, java.lang.String attName, java.lang.String newName)
Note: IS.R.B should not exist in the MKB already.
public boolean deletePCConstraint(PCConstraint thePC)
public boolean deleteJoinConstraint(JoinConstraint theJC)
public IS findIS(java.lang.String ISName)
public Relation findRelation(java.lang.String ISName, java.lang.String RName)
public boolean addJoinConstraint(JoinConstraint theJC)
public boolean addPCConstraint(PCConstraint thePC)
public boolean addLocalCondition(LocalCondition theLC)
public Attribute findAttribute(java.lang.String ISName, java.lang.String RName, java.lang.String AttName)
public JoinConstraint findJC(java.lang.String ISName1, java.lang.String RName1, java.lang.String ISName2, java.lang.String RName2)
public java.util.Vector findPOC(Relation rel, java.util.Vector atleast, int ve)
rel
- Relation Ratleast
- subset of upperline{A}ve
- View Extent Parameterpublic java.lang.String toString()
public long getRelationSize(java.lang.String ISName, java.lang.String relationName)
public double getJoinSelectivity(java.lang.String IS1, java.lang.String relation1, java.lang.String IS2, java.lang.String relation2)
public double getLocalConditionSelectivity(java.lang.String IS, java.lang.String relName, java.lang.String attName, java.lang.String value)
public int getAttributeSize(java.lang.String IS, java.lang.String relName, java.lang.String attName)
public int getAttributeSizeForRelation(java.lang.String IS, java.lang.String relName)
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