Adding Time to an Object-Oriented Versions Model

Transcription

1 Insiuo de Informáica Universidade Federal do Rio Grande do Sul Poro Alegre - RS - BRAZIL Adding Time o an Objec-Oriened Versions Model Mirella Moura Moro Nina Edelweiss Silvia Maria Saggiorao Clesio Saraiva dos Sanos

2 Ouline Inroducion Objecive Basic Conceps Temporal Versions Model Example Implemening TVM Concluding Remarks

3 Inroducion Version: describes an objec in a period of ime or from a cerain poin of view Temporal Model: specifies boh saic and dynamic aspecs of he applicaion by associaing emporal labels

4 Objecive VERSIONS TIME Projec Alernaives Evoluion Hisory Temporal Versions Model

5 Objecive V5 V6 Alernaives V1 V3 V2 V4 Derivaion and daa hisory

6 Basic Conceps Versions Model Temporal informaion order: linear, branched, circular imesamp: insan, inerval, elemen ime dimension: ransacion ime, valid ime, biemporal

7 Temporal Versions Model TEMPORAL FEATURES objec, version, aribue, relaionship emporal label: inerval biemporal (valid and ransacion imes) objec and versions: sar & end emporal label: vtimei, vtimef, Timei, Timef version: a lifeime line objec: branched ime (each version)

8 Temporal Versions Model TEMPORAL FEATURES - ATTRIBUTES sar sar sar VO CL Legend sar v1 v2 sar v3 end sar v4 Class Versioned Objec Version 4 v4 3 3End v3 2 v2 1 v1 T0 T VO

9 Temporal Versions Model LOGICAL AND PHYSICAL REMOVAL LOGIC version saus deacivaed lifeime finished end = exclusion insan vtimef, Timef = end PHYSICAL reduce he daabase size los informaion = los hisoric all exclusions are logical

10 Temporal Versions Model TEMPORAL INTEGRITY RULES Valid Time sar VTransacion Time end vtimeisar vtimef a VLifeime end vtimei Timeisar vtimef a a OV Timef vtimei vtimef a Timei a sar Timef v vtimei Timei vtimef Timef a a sar end v Timei Timef a sar v sar end v end end end

11 Temporal Versions Model VERSION FEATURES versioned objecs and versions derivaion among versions: direced acyclic graph void srucure <eniy id, class id, version number>

12 Temporal Versions Model CLASS DIAGRAM (Golendziner) Objec Versioned Objec Version

13 Temporal Versions Model CLASS DIAGRAM Objec Inheriance navigaing User s Applicaion Class non emporal non versionable Versioning mehods and aribues emporal and versionable Temporal Version User s Applicaion Class Temporal Objec 1 * Temporal mehods Versioned Objec Conrol Conrol 0..1 of versioned objecs

14 Modelo Temporal de Versões STATE DIAGRAM TemporalVersion derive derive Working derive Sable promoe Consolidaed promoe resore resore delee delee Deacivaed Saes W S C D derive promoe updae exclude query share resore

15 Temporal Versions Model CLASS DEFINITION LANGUAGE classdef ::= [ public ][ absrac final ] class classname [ hasversions ] [ inheri [ byexension] classname [ correspondence (1:1 1:n n:1 n:m)] ] [ [ emporal ] aggregaeof [n] classname ( byvalue byreference ) {, [ emporal ] aggregaeof [n] classname ( byvalue byreference )} ] ( [ Properies: { [ public privae proeced ] [ saic ] [ emporal ] aribuename : aribuedomain [ defaul value ] ; }+ ] [ Relaionships: { [ emporal ] relaionshipname (0:1 0:n 1:1 1:n n:m) [ inverse inverserelaionshipname ] relaedclassname ; }+ ] [ Operaions: { [ public privae proeced ] [ saic ] [ absrac final ] operaiondefiniions }+ ] ) ;

16 Example Websie design company Pages wih paern associaed o Paern varies according o he seasons of he year and commemoraive daes

17 Example CLASS DIAGRAM <<Temporal>> associaedwih 0..n WebSie <<T>> URL <<T>> online <<Temporal>> 0..1 iniial Page n WebPage <<T>> pagetile <<T>> pagetex 1..1 PagePaern paernname backgrdcolor backgrdimage <<T>> banner 0..n defaul 1..1 Fon fontype fonsize foncolor foneffec

18 Example DEFINITION LANGUAGE Class WebSie HasVersions aggregae_of n WebPage byreference ( Properies: emporal URL : sring ; emporal online : boolean; Relaionship: emporal iniialpage 1:1 WebPage; emporal associaedwih 1:1 PagePaern; ) ; Class WebPage HasVersions ( Properies: emporal pagetile : sring; emporal pagetex : ex; ) ;...

19 Example GRAPHIC REPRESENTATION Auumn 1,15,0 Winer 2,15,0 Spring 3,15,0 Summer 4,15,0 PagePaern Winer 2,15,2 2,15,2 2,15,1 Winer brighgreen sun2.gif winerad deriveversion deriveversion Chrismas whie sanaclaus5.gif chrismasad deriveversion 2,15,3 ChrismasB brighred sanaclaus7.gif chrismasad3 Chrismas whie sanaclaus5.gif Dec23hAd 2,15,4 NewMillenium brighsilver new2001.gif odysseyad

20 Exemplo RELATIONSHIP AssociaedWih WebSie 2,8,1 WebSie 2,8,1 WebSie 2,8,1 WebSie 2,8,1 PagePaern 2,15,1 PagePaern 2,15,2 PagePaern 2,15,4 PagePaern 2,15,1 Dec 21h Dec 22h Dec 26h Jan 2nd PagePaern associaedwih Iniial Transacion Time Final Transacion Time Iniial Valid Time Final Valid Time 2,15,1 12/01/2000 >> 12/21/ /21/2000 2,15,2 12/01/2000 >> 12/22/ /25/2000 2,15,4 12/01/2000 >> 12/26/ /01/2001 2,15,1 12/01/2000 >> 01/02/2001 >>

21 Example ADVANTAGES Evoluion of he cliens websie is sored Company has he employee hisorical informaion Discover paerns and cliens profiles by using daa mining echniques

22 Implemening TVM MODEL HIERARCHY MAPPING Exising commercial DBMS Mapping from TVM o DB2 Class hierarchy > ype hierarchy mehods: SQL commands + queries Objec, TemporalObjec, TemporalVersion: NOT inaniable srucured ype VersionedObjec (conrol): insaniable by he sysem able VersionedObjecs: sore all insances

23 Implemening TVM COMPLEMENTARY MAPPING OID: elemens > varchar aribue separaed by commas ( 101,20,5 ) METADATA CONTROL_CLASS: ID_CLASS CLASS VERSIONED IS_ROOT ASCENDANT Temporal labes: TEMPORALSTAMP

24 Implemening TVM APPLICATION CLASSES MAPPING NORMAL CLASS 1. a srucured ype: class srucure 2. a able: sores class insances TV CLASS 1. a srucured ype 2. a able 3. a able for each emporal propery 4. riggers: emporal and version updaes

25 Implemening TVM APPLICATION CLASSES MAPPING PagePaern void sar end ascendan configuraion descendan predecessor saus successor refversobjecs paernname backgrdcolor backgrdimage banner refpagepaernbanner PagePaern_Banner void vtimei vtimef Timei Timef refpagepaern banner

26 Concluding remarks Temporal Versions Model as an applicaion specificaion echnique for dynamic sysems (ime-evolving sysems) Exension of he Versions Model by adding ime feaures Design alernaives and daa evoluion

27 Concluding remarks For each version, every updae in aribues and relaionships values defined as emporal are sored Differen versions coexis: branched ime order Inegraion wih exising specificaions: he Model does no require all classes o be emporal and versionable

28 Concluding remarks On-going work: Environmen for class specificaion, objec versioning, versions managemen, query, and visualizaion Schema evoluion model Exender for DB2

29 Insiuo de Informáica Universidade Federal do Rio Grande do Sul Poro Alegre - RS - BRAZIL Adding Time o an Objec-Oriened Versions Model nina@inf.ufrgs.br