EVEDemo.PSWEEP
Class PSWEEP

java.lang.Object
  |
  +--EVEDemo.PSWEEP.PSWEEP

public class PSWEEP

extends java.lang.Object

implements java.io.Serializable

PSWEEP object will maintain one view in it. It will provide a data update receiver to outside, where you can send data update to the PSWEEP object. It requires: 1. View Definition either in ESQL format, or an object of ViewDefinition in VKB. 2. Data update which will affect this view. It will provice: 1. a DataUpdateReceiver to accept the data update. It will DO: Maintain the real extend of that view in the database.

See Also:

Serialized Form

Field Summary

private static boolean	DEBUG
(package private) DataUpdateReceiver	dur DataUpdateReceiver of this PSWEEP Object.
(package private) DWProcess	dw Data warehouse process of this view definition.
(package private) MultiQueue	FifoChannel FifoChannel used to create communication between ISs and DW.
(package private) int	ISnum Number of ISs.
(package private) ISProcess[]	isps Array of ISProcess
static int	step The sleep timer for all the threads.

Constructor Summary

PSWEEP(View_Definition vd)
Create a PSWEEP object from View_definition class in EVEDemo.VKB package.

PSWEEP(View v, MKB mkb)
Create a PSWEEP object from View object in EVEDemo.MW package.

Method Summary

(package private) Attribute	checkAttrList(java.util.Vector attrlist, java.lang.String aname) check if a specific attribute is already in an vector of attribute
(package private) Attribute	getAttribute(java.util.Vector AttrList, java.lang.String attrName) Get Attribute object of PSWEEP from the AttrList (Vector) of PSWEEP Attribute of has the specific name in format R.A
(package private) java.util.Vector	getAttrs(java.util.Vector project, Relation rel) Get the Attributes of one relation in the project list.
(package private) java.util.Vector	getJCs(JoinList JL, Relation rel) Get a list of join conditions related to a specific relation from the current viewdefinition of this PSWEEP object.
(package private) java.lang.String	getLocalAttrName(JoinCondition jc, Relation rel) Get Local Attribute Name of this join condition of specific relation name.
DataUpdateReceiver	getReceiver() Get Receiver from PSWEEP.
(package private) Relation	getRelation(Relation[] rels, java.lang.String Rname) Get the PSWEEP Relation object from a list of relations.
(package private) java.lang.String	getRemoteAttrName(JoinCondition jc, Relation rel) Get Remote Attribute Name of this join condition of specific relation name.
(package private) java.lang.String	getRemoteRelName(JoinCondition jc, Relation rel) Get Remote Relation Name of this Join Condition of Specific Relation name.
(package private) void	init(View_Definition vd) Init the PSWEEP object.
void	start() Start the UpdateView of PSWEEP DWProcess.

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

private static final boolean DEBUG

step

public static final int step

The sleep timer for all the threads.

dur

DataUpdateReceiver dur

DataUpdateReceiver of this PSWEEP Object. The object will be used by Andreas from the middle layer to send the DU down.

FifoChannel

MultiQueue FifoChannel

FifoChannel used to create communication between ISs and DW.

dw

DWProcess dw

Data warehouse process of this view definition. It should be the PSWEEP.DWProcess here. :)

isps

ISProcess[] isps

Array of ISProcess

ISnum

int ISnum

Number of ISs.

Constructor Detail

PSWEEP

public PSWEEP(View v,
              MKB mkb)
       throws java.lang.Exception

Create a PSWEEP object from View object in EVEDemo.MW package.

PSWEEP

public PSWEEP(View_Definition vd)
       throws java.lang.Exception

Create a PSWEEP object from View_definition class in EVEDemo.VKB package.

Method Detail

getReceiver

public DataUpdateReceiver getReceiver()

Get Receiver from PSWEEP. Where you can use it to send data update to PSWEEP

start

public void start()

Start the UpdateView of PSWEEP DWProcess.

init

void init(View_Definition vd)
    throws java.lang.Exception

Init the PSWEEP object.

getJCs

java.util.Vector getJCs(JoinList JL,
                        Relation rel)

Get a list of join conditions related to a specific relation from the current viewdefinition of this PSWEEP object.

Parameters:

JL - join list

rel - reference of relation.

Returns:

return empty vector is not found.

getLocalAttrName

java.lang.String getLocalAttrName(JoinCondition jc,
                                  Relation rel)

Get Local Attribute Name of this join condition of specific relation name.

Parameters:

jc - Join Conditoin.

rel - relation's name.

getRemoteRelName

java.lang.String getRemoteRelName(JoinCondition jc,
                                  Relation rel)

Get Remote Relation Name of this Join Condition of Specific Relation name.

Parameters:

jc - Join Condition.

rel - Relation's Name.

Returns:

"R"

getRemoteAttrName

java.lang.String getRemoteAttrName(JoinCondition jc,
                                   Relation rel)

Get Remote Attribute Name of this join condition of specific relation name.

Parameters:

jc - Join Condition.

rel - relation's name.

Returns:

"A"

checkAttrList

Attribute checkAttrList(java.util.Vector attrlist,
                        java.lang.String aname)

check if a specific attribute is already in an vector of attribute

Parameters:

attrlist - vector of attributes

aname - attribute name "R.A".

Returns:

not found return null.

getRelation

Relation getRelation(Relation[] rels,
                     java.lang.String Rname)

Get the PSWEEP Relation object from a list of relations.

Parameters:

rels - array of relations.

String - name of relation.

Returns:

not found return null;

getAttrs

java.util.Vector getAttrs(java.util.Vector project,
                          Relation rel)

Get the Attributes of one relation in the project list.

Parameters:

project - (Vector) Project list composed of attribute_component

rel - specific relation object in sweep package.

Returns:

a vector of objects of DSRG.MKB.Attributes.

getAttribute

Attribute getAttribute(java.util.Vector AttrList,
                       java.lang.String attrName)

Get Attribute object of PSWEEP from the AttrList (Vector) of PSWEEP Attribute of has the specific name in format R.A

Parameters:

AttrList - vector of PSWEEP Attributes.

String - Attribute Name in format "R.A"