1

Bo Bi Tp Ln

Nhm 5

Ti:

Developing domain - specifis languages using MetaEdit+

Ging Vin Hng Dn: thy ng c Hnh Sinh vin thc hin: 1, Bi Th Cng. 2, Nguyn Vn Hi. 3, Hong Th Nh.

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Mc Lc Li Cm n ..................................................................................................................................... 3

Gii thiu ti ............................................................................................................................... 4

I. Domain-specific language ......................................................................................................... 5

1. Khi nim ........................................................................................................................... 5

2. nh ngha DSL .................................................................................................................. 5

3. Phn loi ............................................................................................................................. 6

4. Khi no cn dng DSL ........................................................................................................ 6

5. u im v nhc im ...................................................................................................... 6

II. Meta Edit+ ............................................................................................................................. 7

1. Gii thiu MetaEdit+ .......................................................................................................... 7

2. Mi trng pht trin .......................................................................................................... 7

3. Cng c qun l mi trng ................................................................................................ 8

4. Metamodeling vi MetaEdit+workbench ............................................................................ 8

5. Thit k d liu u ra v Exchange tool ........................................................................... 19

III. Kt lun................................................................................................................................ 27

IV. Ti liu tham kho ................................................................................................................ 28

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Li Cm n

Chng em xin gi li cm n chn thnh n cc thy ng c Hnh, thy V nh Hiu, thy

Trng Ninh Thun tn tnh hng dn, cung cp cc ti liu cn thit chng em hon thnh

tt ti ny.

Ngoi ra trong qu trnh hc tp v nghin cu mn Cc Vn Hin i Ca Cng Ngh Phn

mm chng em bit c rt nhiu kin thc mi v cc phng php pht trin phn mm hin

i, xu hng pht trin phn trong tng lai. Bn cnh di s hng dn tn tnh ca cc thy

chng em cn bit thm cc cch tip cn vn khoa hc mi, cc kin thc mi, cch lm vic

nhm hiu qu, cc kin thc v trnh by mt vn bn khoa hc, cch thuyt trnh theo nhm v

nhiu kin thc b ch khc na.

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Gii thiu ti

Ngnh cng ngh phn mm hin nay ang pht trin rt mnh m trn quy m rng ln, cng vi

l yu cu v cht lng sn phm phn mm cng nh cc dch v bo tr, nng cp phn mm

cng i hi nhng tin b vt bc. Nhng phng php sn xut phn mm theo cc phng

php c s dn thay i v chuyn sang nhng phng php ti u hn mt trong nhng phng

php l m hnh ho chuyn bit min (Developing domain - specifis languags vit tt l DSL).

DSL l phng php xy dng phn mm da trn cc m hnh, t cc m hnh ny s c dch

chuyn sang m chng trnh nh cc b sinh m ngun (code generator) hoc dch sang phn mm

c th s dng trc tip. DSL gip gim thi gian to ra mt sn phm phn mm, d dng trong

thay i theo yu cu khch hng, thun li cho cc cng vic bo tr v nng cp. MetaEdit + l cng c mnh m trong vic pht trin phn mm da theo cc m hnh (DSL). N

cung cp cc cng c hu ch cho vic pht trin phn mm gip ngi dng d dng xy dng cc

m hnh v t cc m hnh to ra cc phn mm hon chnh m khng cn lm vic vi bt c

dng lnh no.

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I. Domain-specific language

1. Khi nim Domain-specific language(DSL) l mt ngn ng my tnh chuyn vo mt min ng

dng c th, tri ngc vi mt ngn ng mc ch chung (GPL- general-purpose

language ) p dng rng ri trn cc lnh vc, v thiu cc tnh nng chuyn bit cho

mt lnh vc c th.

DSL c chia nh:

- Domain-specific markup languages.

- Domain-specific modeling languages.

- Domain-specific programming languages

2. nh ngha DSL - Syntax and Sematic

Khi mi ngi tho lun v mt ngn ng lp trnh, thng nghe h ni v c php

v ng ngha. Syntax nm bt cc biu thc php l ca chng trnh, tt c mi th

trong DSL-syntax custom c nm bt bng ng php. Sematic ca mt chng

trnh l nhng g n lm khi n thc thi.

V d:

Parsing a DSL populates a Semantic Model

Trong v d ny , cc m hnh ng ngha l mt m hnh i tng . Mt m hnh ng

ngha cng c th c cc hnh thc khc . N c th l mt cu trc d liu n thun

vi tt c cc hnh vi trong cc chc nng ring bit .

- Code generation

S rt hu ch khi bn mun s dng DSL vi nn tng 1 ngn ng m khng c cng

c h tr cho DSL. C th lm iu ny bng vic s dng Sematic model l u vo

v to ra m m sau c th thc thi trn nn tng .

C 2 cch s dng Code generation

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C1 + To ra m ri sa cha m bng tay.

C2 + To ra m nhng khng bao gi sa m bng tay, v c th ti to, ti s dng.

iu ny c bit ng vi DSL.

3. Phn loi DSL c 2 hnh thc l : External DSL v Internal DSL

+ External DSL tn ti c lp vi bt k ngn ng khc, SQL l mt v d v mt

External DSL.

+ Internal DSL tn ti bn trong mt ngn ng lp trnh khc - v d Rails l mt

Internal DSL c lu tr trong ngn ng lp trnh Ruby.

Thng thng, External DSL d dng to ra hn nhng khng linh ng bng Internal

DSL. Internal DSL khng ch trng v vic phn tch c php hoc ng php, nhng

phi ph hp vi c php hp l trong ngn ng ch (v d.M Rails phi l c php

hp l ca Ruby), ngc li mt External DSL c th c bt k c php ca ring

mnh vi mc chi ph nhiu hn vic xy dng mt phn tch c php v ng php.

4. Khi no cn dng DSL Mi ng dng c quy tc kinh doanh ring ,cn phi r rng, d c, v khai bo. Mt

DSL l mt cch l tng m hnh cc loi quy tc. N khng mt nhiu cng sc

pht trin mt DSL. Nhng cc tc ng m n c v ngi s dng c th rt ln.

Trc khi bn quyt nh,bn cn phi cn nhc nhng u v khuyt im. Nh vi

bt k cng ngh no khc, DSL c th c nhng cm by. L mt nh pht trin, bn

l ngi tt nht nh gi xem bn cn mt DSL m hnh ha cc vn hin

ti. Do , bn cn phi nhn thc c nhng u im v nhc im ca DSL.

5. u im v nhc im 5.1 u im

- DSL cho php to ra cc gii php cc gii php phi c th hin trong cc mc

tru tng ca vn trong lnh vc no . tng y l cc chuyn gia

trong linh vc c th hiu , xc nhn, v c th pht trin DSL trong lnh vc

. Tuy nhin y l trng hp him.

- DSL nng cao cht lng, nng sut, tin cy, bo tr, linh ng v c th dng

li. (d dng thay i theo yu cu ndung bng cch thay i m hnh).

- DSL ngn gn: v dsl ngn gn nn d dng trong vic quan st, qun l, v hin

th.

- DSL c thit k mc tru tng cao. DSL khng phi i ph vi cc cu

trc ngn ng thp hn, n ti u ha cu trc d liu v thc hin cc k thut

khc. Thay vo DSL thc hin trn min kin thc c mc m n c th

c m bo, xc nhn, v ti s dng d dang hn.

- DSL c kh nng m rng.

5.2 Nhc im

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- Ngn ng kh thit k. DSL thc hin ngn ng thit k n l mt phc hp cc

cng vic khng c quy m c th. N nh mt ngn ng bc cao, tuy nhin n rt

phc tp v khng phi l cng vic d dng vi lp trnh vin.

- DSL cn c chi ph tr trc. mt d n da trn DSL cn c chi ph tr trc.

II. Meta Edit+

1. Gii thiu MetaEdit+

MetaEdit+ l mt ng dng da trn kho lu tr, c ngha l mt kt ni n

kho la tr phi c thit lp trong cng c. Th tc ng nhp ny c bt

u t Startup Launcher c m ra khi MetaEdit+ bt u.

Ngoi vic ng nhp, mt s chc nng khc c th c truy cp t Startup.

MetaEdit+ bo gm cc b Editor, generator, cc cng c qun l khc.

2. Mi trng pht trin

MetaEdit + to thnh mt mi trng a cng c linh hot v mnh m cho

php linh hot sng to, bo tr, x l, thu hi v i din cc thit k thng tin

gia nhiu nh pht trin. l cc tnh nng:

+ Multi-project

+ Multi-modeling language

+ Multi User

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+ Multi tool

+ Multipltform

3. Cng c qun l mi trng

Metaedit+ c cc cng c qun l mi trng mnh m bm gm Startup , main

laucher, browsers, graph manager cc hp thoi ca properties

3.1 Mi trng v cng c qun l thng tin

bao gm hai Launchers cho qun l mi trng v cc cng c khc, trnh

duyt v Graph Manager duyt cc thng tin c lu tr trong cc

Object Repository, hp thoi ti sn xem v chnh sa thng tin v cc

yu t thit k duy nht, v Info Tools cho mi lin kt xem gia cc th,

ti s dng cc mu thit k, v kha thng tin (trong phin bn a ngi

dng)

3.2 Editor

l nhng cng c xem, chnh sa v qun l d liu thit k.

MetaEdit+ bao gm mt Diagram Editor, Matrix Editor, v Table Editor.

3.3 Generator v intergration

Bao gm c Generator chuyn i d liu kho lu tr cc nh dng u

ra khc nhau, cc cng c import v Export cc nh ngha ngn ng v

thit k d liu gia cc kho, cng c API v cc hot ng dng lnh.

3.4 Cng c pht trin ngn ng

hnh thnh nn mt phn metaCASE ca mi trng cho php ngi dng

thay i mi trng. Cc cng c pht trin c m t trong mt hng

dn ring bit MetaEdit+ Workbench Users Guide

4. Metamodeling vi MetaEdit+workbench

4.1 Cc khi nim c bn

4.1.1.1 GOPPRR

Graph

Mt graph l tp hp cc i tng (object), quan h (relationship), vai

tr (roles), cc rng buc( bindings) th hin mi quan h gia cc

i tng. mt graph cng cha cc thng tin v cc th thnh phn

ca n.

Object

Mt object l thnh phn ca mt graph. V d nh buttong, trng thi

hay mt hnh ng no . Tt c cc trng ca object u c th ti

s dng

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Relationship

Mt relationship l mt th hin r rng s kt ni gia hai hoc nhiu

i tng.

Role

Mt role xc nh vai tr ca mt i tng trong mi quan h.

Port

L mt c im k thut bt buc trong mt object. thng thng role

m bo vic kt ni gia cc i tng v ng ngha ca vic kt ni ;

trong khi c c mt role nht nh kt ni n nhiu ni

khc nhau trn mt i tng vi cc ng ngha khc nhau ta s dng

port.

Property

L mt m t cc thuc tnh hoc iu kin kt ni vi cc loi khc.

4.1.1.2 Properties (cc thuc tnh)

Properties gm hai thnh phn l kiu d liu v gi tr ca n. Cc

kiu d liu c bn : String, number, text, bool

4.1.1.3 Bindings (cc rng buc)

Cc thng tin v object(i tng), port(cng), role (vai tr), v

relationship (quan h) trong mt graph c kt ni vi nhau nh th

no c lu di dng bindings. Mi binding cha mt quan h v

hoc nhiu kt ni gm mt role, mt object v ty chn mt port.

4.1.1.4 Cu trc phn tch

Ty thuc vo phng php s dng mi i tng c th chia ra thnh

cc graph mi.

4.1.1.5 Cu trc n

Khc vi cu trc phn tch cu trc n cho php cc object,

relationship hoc role trong mt graph c th kt ni vi cc graph

khc. Cu trc n cho php chn mt i tng trong graph v kt ni

ti graph mi.

4.2 Cc cng c trong metamodeling

4.2.1.1 Graph tool

Cung cp cc chc nng truy cp, xem v chnh sa cc thng s k

thut ca ngn ng m hnh cp biu .

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Hnh : graph tool

Cc thnh phn ca graph tool:

Basics

Dng xc lp cc thng tin c bn ca graph nh: tn, thuc tnh,

m t.

Types

Xc nh cc thnh phn non-properties ca graph.

Bindings

Khai bo cc cu trc binding.

Subgraph

Khai bo cc cu trc nh : cu trc phn tch, cu trc n.

Contraints

B sung cc quy tc cho th.

4.2.1.1.1.1 nh ngha mt graph

T thanh cng c ca metaedit+ chn Metamodel| graph

tool. Nu c graph t trc ta chn nt open trn thanh

cng c n s hin ra danh sch cc graph cho ta chn.

nu cha c graph ta hon thnh cc thng tin cho graph

mi nh sau.

Bc 1: t tn cho graph ti name.

Bc 2: nh ngha object, relationship, v role ti tab

Types.

Bc 3: nh ngha binding cho cc thnh phn ti tab

Bindings.

Bc 4: nh cc cu trc ti tab subgraph.

4.2.1.1.1.2 Thay i v chnh sa graph c

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M graph c ta chn Graph |open mt danh sch cc

graph s hin ra ta c th chn graph cn chnh sa

thay i tt c cc thuc tnh ca n.

4.2.1.1.1.3 Types tab

Dng la chn cc Object, Relationship, v Role ca

modeling language. N cha danh sch Objects,

Relationships, Roles, vi mi danh sch ny ta c thm,

xa cc i tng bn trong n.

4.2.1.1.1.4 Bindings tab

xc nh cc Relationship, roles, port v object c

kt ni vi nhau th no. Ti tab ny n s hin th cc

thnh phn ca graph c kt ni vi nhau th no ng

thi n cho php ta nh ngha cc kt ni .

nh ngha mt kt ni ta lm nh sau:

Bc 1: chn mt Relationship ti Relationship

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Bc 2: chn mt role ti role

Bc 3: chn cng kt ni ti Ports

Bc 4: chn i tng ti Objects

C rt nhiu trng hp mt object c th kt ni vi

nhiu i tng khc nhau m ta iu ny ti roles ta

chn chut phi ln mt role c nhiu kt ni n object

khc tip theo cn Cardinality, hp thoi Cardinality hin

ra cho php ta ty chnh s lng kt ni:

Ta in cc ch s vo minimum v maximum.

4.2.1.2 Object tool

Cung cp cc chc nng to, sa, xem cc object trong h thng.

4.2.1.2.1.1 Khai bo mt object mi

m object tool chn Metamodel | Object tool. Ca s

object tool hin ra.

Ti y ta c th to mt object mi:

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Bc 1: t tn cho object ti name

Bc 2: thm cc thuc tnh cho object ti properties

bng cch chn chut phi ln vng trng ta c th thm

mi hoc thm cc thuc tnh c.

Bc 3: thm m t ti Description.

Bc 4: lu cc thng tin li bng cch chn nt save trn

thanh cng c.

Ngoi ra ta c th chnh sa object sn c bng cch chn

nt open trn thanh c c sau chn object cn chnh

sa.

4.2.1.3 Relationship tool

Relationship tool cho php bn to mi, xem, chnh sa cc loi

relationship.

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4.2.1.4 Role tool

Role tool dng xc nh thnh phn cui cng trong mi quan h

gia cc i tng.

4.2.1.5 Port tool

Port tool c s dng xc nh cng nh l mt phn ca object

sysbols v chn vai tr ng vi n. N cho php b sung hoc hn ch

cc ng ngha cch cc i tng kt ni.

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4.2.1.6 Property tool

Tt c cc thnh phn ca graph (gm c graph) c cc thuc tnh gn

lin vi chng. Property tool cho php vic khai bo cng nh chnh

sa cc thuc tnh ny.

4.3 Symbol Editor

Symbol Editor l mt loi ca cng c v c bit cho cho cc cng vic vi cc

biu tng ca object, role hay relationship c hin th trong Diagram Editor v

Maxtrix Editor. Cc biu tng c to ra t cc khi hnh, mu sc, cc text.

Cc gi tr ca properties cng c nh ngha hon ton bi symbol. Symbol

tool cho php bn ly nhng biu tng t th vin gip d dng s dng.

4.3.1.1 Lm vic vi symbol Editor.

m symbol editor ta chn nt Sysbol trm thanh cng c cc tool

object, relationship hay role. Ta c giao din ca sysmbol Editor:

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4.3.1.1.1.1 To symbol mi

Chn symbol|new. sau khi hon thnh cc thao tc vi

symbol ny ta chon symbol|save hon tt.

4.3.1.1.1.2 Import symbol t th vin

import cc symbol sn c ta chn symbol|import from

library ri chn symbol thch hp.

4.3.1.2 To cc i tng cho sysbol

4.3.1.2.1.1 Cc khi hnh

Sau khi to mt symbol mi ta bt u xy dng cc biu

tng cn thit to symbol th hin c cc thuc

tnh ca object, relationship hoc role c chn.

Trn thanh cng c ta thy cc khi hnh ta c th la

chn khi hnh bt k bng cch chn nt tng ng vi

khi hnh trn thanh cng c v khi hnh ln vng

editor. Sau khi v xong ta c th t cc thuc tnh tng

ng cho cc thnh phn bng cch click p ln thnh

phn hp thoi format hin ra:

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Chn property tng ng cho biu tng .

4.3.1.2.1.2 Connectable

Conectable l dng symbol c bit n c to ra trong

vng ca symbol cho php s kt ni gia hai i tng.

Cc to connectable:

Bc 1: chn Connectable trn thanh cng c

Bc 2: ko th chut dc theo mt cnh ca symbol.

Bc 3: click p chut hon tt to connectable.

4.3.1.2.1.3 Connectable v ports

Object symbols c th c nhiu kt ni tc l cn c nhiu

connectable, thc hin iu ny ta c th to cng cho

mi kt ni.

Yu cu cho vic ny l mi connectable c mt cng

ring. Mi connectable s c v nn cnh ca khi

hnh.

Cc bc to port v connectable:

Bc 1 : v connectable ln cnh ca symbol

Bc 2 : chut phi ln conectable chn format, hp

thoi cng hin ra.

Bc 3 : chn Add nu mun thm cng mi , hoc Add

Exiting thm cng c.

Ngoi ra symbol Editor cn cung cp cc ty chn khc gip ngi

dng d dng trong qu trnh s dng.

4.4 Editors

Editor trong MetaEdit+ l ni to, xem v chnh sa cc thng tin thit k.

C ba loi l: Diagram Editor, Maxtrix Editor v Table Editor.

Trong ti liu ny chng ti gii thiu v trnh by Diagram Editor.

4.4.1.1 Diagram Editor

Diagram Editor l cng c c chc nng to, qun l v duy tr graph

di dng diagram. Vi diagram chng ta c th xem, chnh sa graph

to cc cu trc lin kt gia cc graph.

Diagram editor cho php cc cng vic nh copy, cut, delete, paste,

print, generate cc thnh phn ca graph.

4.4.1.2 Diagrams

Cc thao tc vi mt diagram:

M mt diagram ta thc hin cc bc sau:

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Bc 1: chn Edit|Diagram Editor

Bc 2: chn graph cn m.

Bc 3: bn c th chn xem graph c hoc to graph mi.

Qun l Diagram:

Metaedit+ cho php ta qun l diagram rt chi tit : n cho php thc

hin cc cng vic nh to mi, m, v chnh sa v xem graph.

Ngoi ra Diagram cn cung cp nhiu tnh nng khc h tr ngi dng

ti a.

4.4.1.3 Object

Diagram cung cp cc thao tc vi object nh thm object mi, thm

object c, chn object, thay i object, hoc chnh sa mt object.

4.4.1.4 Relationships v Roles

To Relationship gia hai object

Bc 1: chn loi relationship t thanh cng c

Bc 2: di chuyn chut n object u tin khi no object c t

sng ta click chut tri.

Bc 3: di chuyn n object th 2 tng t click chut hai ln hon

tt.

To Relationship gia nhiu object

Bc 1: chn loi relationship t thanh cng c

Bc 2: di chuyn chut n object u tin khi no object c t

sng ta click chut tri.

Bc 3: di chuyn chut ti khong trng v click chut tri to

im r nhnh.

Bc 4: di chuyn n object th 2 tng t click chut hai ln hon

tt.

Bc 5: di chuyn n object tip theo v click chut tri to

relationship.

Ngoi ra Diagram cn cung cp cc chc nng khc cho php thao tc

vi relationship v role nh: xa mt relationship, chnh sa cc role, di

chuyn relationship.

4.4.1.5 Ports

Sc mnh ca cng l lm ni bt vai tr ca cc kt ni trong rng

buc ca i tng. c hai loi cng l:

Static ports

L cng c nh c duy tr trn cc i tng, cc i tng cng loi

c cng mt cng.

Dynamic ports

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Dynamic port c ly ti thi gian chy v chng c th c to t

nhiu ngun khc nhau (c th l trong thuc tnh ca object hoc l t

subgraph).

Dynamic ports c xem nh connectables trong vic to ra cc

relationship v cc role trong trng hp ny n tng t nh static port

v n cung cp nhng cc tng t m rng ng ngha cc rng

buc. tuy nhin dynamic port c nhng im khc bit so vi static port

l thay v gn b gn vo mt object c nh n c th di chuyn,

di chuyn n ta chn cc roler gn liu vi n v ko th theo mong

mun.

4.4.1.6 Subgraph

m mt subgraph ta chn mt i tng gi ctrl+double ln i

tng .

5. Thit k d liu u ra v Exchange tool

5.1 In

Meta edit+ cho php in cc biu Diagram Editor, Maxtrix Editor, Table Editor.

Chn File | print m cng c in:

Print setting cho php chnh sa chiu rng, chiu di, phng to thu nh khi

chnh xong cc ty chn chon OK in.

5.2 Generator

Cc cng vic sinh ra ma ngun, sinh ti liu , kim tra bo co u c Meta

edit+ thc hin bi Generator.

a. Generating

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Meta edit+ cung cp cc Generator cho cc cng vic check, review hoc thit

k ti liu. Cc b Generator ny l c lp chng gm c:

- Check dng lit k cc i tng c mi quan h vi cc i tng khc,

v tt c cc mi quan h lin quan ti chng.

- Dictionary : dng in ra tt c cc i tng v cc ti liu lin quan.

- Export graph hierachy to HTML: to ra tp tin di dng html c th m

bng cc trnh duyt. N hin th mt th y cc thnh phn gm cc

i tng, mi quan h gia cc i tng , cc ti liu lin quan n i

tng. . .

- Export graph hieararchy to Word: tng t nh khi export ra tp tin html

meta edit+ cng export y cc thng tin ra tp tin di dng word.

- Export graph to HTML: meta edit+ export cc thnh phn ca Graph di

dng HTML nhng khng bao gm cc subgraph.

- Export graph to Word: meta edit+ export cc thnh phn ca Graph di dng

Word nhng khng bao gm cc subgraph.

- Metric : thc hin cc tnh ton v bo co s lng cc i tng, s lng

cc i tng theo loi, s lng cc mi quan h

- Object Connections : hin th cc i tng khc nhau c lin quan n nhau

nh th no.

- Object list: m t tt c cc i tng trong graph.

- Object Nesting: nhn thng tin v cc i tng lng nhau trong mt s

m ha chng ln nhau.

- Property List: m t cc thuc tnh ca mi i tng.

- XML : xut cc thng tin ca graph di dng XML.

Thc hin Generator

u tin chn project cn generate tip theo chn graph bm chut phi ln

graph , mt menu hin ra tip theo chon Generate thc hin:

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Hnh 2: thc hin generator

b. To ti liu (Documentation generation)

Cc thng tin thit k c Meta edit+ cung cp cho php ngi dng c th

xem li thit k v cc ti liu ca d n. Meta edit cung cp ti liu di

dng HML hoc .DOC hoc .RTF.

- Ti liu Graph

Ti liu cho graph l c sn cho tt c cc th. Generator s to ra mt file

duy ti liu v graph , n bao gm cc thnh phn: cc thng tin v graph nh

tn, trng thi, nhng ngi lm vic trn graph; Mi i tng s c to

mt bng gm cc thng tin v i tng ; M t v mi i tng gm

tn, mi quan h, subgraph ca n.

Thc hin to ti liu cho graph :

Bc 1 : chn graph cn sinh ti liu

Bc 2 : Chut phi ln graph chn generate

Bc 3: chn Export graph to HTML hoc Export graph to Word

- Ti liu Project

Ngoi ti liu cho tng Graph ring chng ta c th to ti liu cho ton b d

n. to c ti liu cho d n chng ta phi kt hp cc Graph con theo

m hnh ca d n.

Ti liu d n bao gm :

- tn v miu t ca d n, trng thi hin ti, ngi qun l, cc thnh vin

thc hin d n vi cc thng tin lin h.

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- cc biu diagram, cc hnh nh ca diagram.

Ti liu d n khng sinh t ng m phi to th cng. Cc bc sinh ti

liu cho d n:

Bc 1: to mt Project Model graph

Bc 2: nhp cc thng tin v d n.

Bc 3: m Project Model vi mt diagram

Bc 4: thm cc graph mi vo d n.

Bc 5: sinh ti liu cho d n chng ta c th to ti liu di dng HTML

hoc Word.

c. Sinh m ngun (code generating)

- Meta edit+ c th sinh ra cc loi m ngun khc nhau ty thuc vo m hnh

n th hin c th l:

- UML: sinh ra m ngun c++, java, Delphi

- Entiy-relationship Diagram: SQL.

- nh ngha cc khi nim truy vn:

Property: n c nh ngha bi tn ca n bt u bng u :.

truy cp n cc thnh phn bn trong mt property ta s dng c php :

property tn property; cc thuc tnh con 1; thuc tnh con 2.

Object type: n c nh ngha bi tn bt u bng du ..

Relationship type: c nh ngha bng tn bt u bi du >.

Role type: c nh ngha bt u bng du ~.

Port type: c nh ngha bt u bng du #.

- Cc bc sinh code:

Bc 1: chn Graph cn generating sau chn Metamodel | Generator

Editor. Ta c giao din:

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Hnh : generator

Vng 1: Generator box cha danh sch cc generator. to mi chn

biu tng new trn thanh cng c.

Vng 2: Concerpt box : dng la chn cc thnh phn cn hin th

cho vng 3.

Vng 3: Choice box: hin th cc la chn ca vng 2 cho ngi dng

chn cc thnh phn .

Vng 4: Editing area : nh ngha code cho generator.

Bc 2: To b generator mi

T thanh cng c chn biu tng new.

Bc 3: Ci t cho u ra

Ti vng s 4 xut hin cu lnh:

Report GraphName

Foreach type{

}EndReport

Trong vng foreach ta dng cc cu lnh c c u ra theo ca

mnh.

- Nh vy chng ta thy Meta edit+ c kh nng ty bin to ra cc loi m

ngun khc nhau.

d. Cc cu lnh

i, lnh if else

cc ton t:

=: dng so snh chui v s

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=~: tng t nh = nhng n ph hp hn vi vic so snh mt tp

thng qua cc k t i din nh du * (t 0 n n), # (1 nhn vt)

v bn phi.

=/ : ph hp vi biu thc chnh quy.

: ph nh ca =.

< and and >=: ln hn hoc bng.

C php ca if:

If :property = value then

/*cu lnh*/

Else

/*cu lnh*/

endif

ii, lnh lp foreach

l cu trc chnh trong Generator. N ch cho php lp vi object, role,

relationships. C php ca foreach

foreach .objType{

}

iii, lnh lp do v dowhile

lch foreach ch duyt qua cc thnh phn ca th n c yu cu

duyt, cn do v dowhile duyt vo thnh phn con ca vng lp

foreach. Dowhile l bin th ca do ch khc l n b i cc du cu

hoc newline trong ln lp cui cng ca n.

V d cho do v dowhile:

Do .Process {id , } produces 1.0, 1.1, 1.2,

Dowhile .Process {id , } produces 1.0, 1.1, 1.2,

iv, vng lp c b lc v vng lp sp sp

L vng lp foreach c thm cc tham s nh where , orderby, unique.

V d:

Foreach .objType; where : proName = value{ /*cu lnh*/}

v, lp thng qua explosions

cc lin kt gia cc i tng, relationship, hoc role bn trong cc .

subgraph c th c theo di thng qua t kha Explosion.

Do explosions {

id

newline}

5.3 Thit k d liu cho export v import

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Meta edit+ cung cp cc cng c thc hin vic export cng nh import

gia Meta edit+ repositories v cc API hoc workbench. N cng c th

exporting v import c hai loi metamodel v instance (m hnh) phn cp d

liu. Meta edit+ cung cp hai nh dng cho vic thay i d liu: mt l nh

dng nh phn cho nh dng export / import gia metamodel repositorise v

m mt XML da trn cng c tch hp m rng.

a. Exporting graphs

Bc 1: m project cha graphs cn export.

Bc 2: trong meta edit+ , tt c vic export c kch hot trong Graph

Manager. m Graph manager chng ta chn nt Export trn thanh cng

c hoc chn Browsers| Graph Manager.

Bc 3: trong Graph Manager chn gaph cn export. Chng ta c th chn

/hy chn mt hoc tt c cc graph bng cc nt bn di.

Hnh : Graph Manager

Bc 4: Thm cc thnh phn vo Graph. Danh sch bn tri l cc thnh

phn ca graph c chn, danh sch bn phi l cc thnh phn s c

export. thm vo danh sch bn phi ta chn mt / tt c thnh phn bn

tri ri chn mi tn gia hai danh sch.

Bc 5: Export : chn save Path hoc chn Export to XML. Vic save as

patch s to ra mt file nh phn vi phn m rng l .mec; khi chn

Export to XML s to ra file nh phn vi phn m rng l .mxm.

b. Importing metamodels v models

import metamodel hoc model ta thc hin cc bc sau:

Bc 1: chn Respository|Import t thanh cng c

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Bc 2: trong hp thoi ny , chn binary hoc XML import. Vi

ngi dng n Meta edit c th import cc tp tin di dng: .mxt, .met,

.mxm, .mxs , .mec. vi mi trng nhiu ngi dng th ch c th import

file di dng .mxm

Bc 3: Chn nt Commit trn thanh cng c.

5.4 API

API cung cp cho ngi dng cch thit k d liu v cc hm vi cng c

ring ca h. API trong meta edit+ c thc hin trn SOAP l mt Web

Service server.

a. MetaEdit+ API tool

s dng API :

Bc 1: t thanh cng c chn: Repository|API tool

Hinh: API tool

Bc 2: ty chnh thng s

Trong mc Server Setting bn c th ty chn thng s v tn host v cng .

vi ngi dng bnh thng th khng cn chnh sa g thm.

Bc 3: bt u server API bng cch click vo nt Start Server.

Bc 4: thc hin cc cc ng dng bn ngoi c s dng API.

Bc 5: dng phin lm vic vi API click vo nt Stop server.

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III. Kt lun

Thng qua vic tm hiu ti Developing domain - specifis languages using MetaEdit+, chng em bit thm rt nhiu kin thc b ch v domain - specifis languages(DSL) v cng c MetaEdit+.

Vi phng php DSL cho php m hnh ha cc yu cu thuc min v sinh m ngun t cc m hnh. iu ny lm tng tnh t ng trong pht trin phn mm. Vi phng php DSL th giai on u cn pht trin mt ngn ng m hnh ha chuyn bit min. Pht trin hng m hnh c bit ph hp vi cc sn phm phn mm cng dng hoc cc kha cnh ngang trong pht trin phn mm. DSL gip tng cht lng nng sut trong vic sn sut phn mm.

MetaEdit+ l cng c mnh m gip ngi lp trnh thc hin DSL. Vi nhng tnh nng u vit Meta Edit+ gip ngi dng d dng qun l xy dng, qun l cc project ca mnh tng nng sut v hiu qu lm vic.

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IV. Ti liu tham kho

1. http://www.metacase.com/support/51/manuals/meplus/Mp.html

2. http://www.metacase.com/support/51/manuals/mwb/Mw.html

3. DSLs in action Jonas Boner