Web Applications with Javascript or Java: Volume 2: Associations and Class Hierarchies (De Gruyter Textbook)

200 Pages·2021·6.186 MB·English

by  Mircea Wagner, Gerd / Diaconescu

GerdWagnerandMirceaDiaconescu
WebApplicationswithJavascriptorJava
DeGruyterGraduate
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Gerd Wagner and Mircea Diaconescu
Web Applications with
Javascript or Java
Volume 2:
Associations and Class Hierarchies
Authors
Prof.Dr.GerdWagner
BTUCottbus-Senftenberg
FachgebietInternettechnologie
Konrad-Wachsmann-Allee5
03046Cottbus
[email protected]
MirceaDiaconescu
[email protected]
Thisbook,alongwithanyassociatedsourcecode,islicensedunderTheCodeProjectOpen
License(CPOL),seehttp://www.codeproject.com/info/cpol10.aspx,implyingthattheassociated
codeisprovided“as-is”,canbemodifiedtocreatederivativeworks,canberedistributed,andcan
beusedincommercialapplications,butthebookmustnotbedistributedorrepublishedwithout
thepublisher’sconsent.
ISBN978-3-11-050024-0
e-ISBN(PDF)978-3-11-050032-5
e-ISBN(EPUB)978-3-11-049756-4
LibraryofCongressControlNumber:2020948051
BibliographicinformationpublishedbytheDeutscheNationalbibliothek
TheDeutscheNationalbibliothekliststhispublicationintheDeutscheNationalbibliografie;
detailedbibliographicdataareavailableontheInternetathttp://dnb.dnb.de.
©2021WalterdeGruyterGmbH,Berlin/Boston
Coverimage:monsitj/iStock/thinkstock
Typesetting:IntegraSoftwareServicesPvt.Ltd.
Printingandbinding:CPIbooksGmbH,Leck
www.degruyter.com
ToOurFamilies.

Foreword
Thistwo-volumebookshowshowtodesignandimplementwebapplicationswitha
model-based engineering approach, using the two most relevant technology plat-
forms for web development: JavaScript and Java. Web apps are designed with the
helpofinformationmodelsintheformofUMLclassdiagramsandimplementedas:
1. JavaScript front-end apps, using one of the two local storage technologies of-
feredbywebbrowsers;
2. Javaback-endapps,usingJavaServerFaces(JSF)asthe user interface technol-
ogy,theJavaPersistenceAPI(JPA)forobject-to-storagemapping,andaMySQL/
MariaDBdatabasemanagementsystem.
The focus of the book are general concepts and techniques concerning the funda-
mentalinformationmanagementissuesof
1. integrityconstraintsanddatavalidation,
2. enumerationsandenumerationattributes
3. unidirectionalandbidirectionalassociationsbetweenobjecttypes,
4. subtypingandinheritanceinclasshierarchies.
ThefirsttwoissuesofthislistarediscussedinVolume1ofthebook,whilethelast
twoissuesarediscussedinVolume2.
WeassumethatthereaderisalreadyfamiliarwithHTMLandwithatleastone
object-oriented programming language, such as C++, Java, PHP, Python or C#. In
addition, we assumethat thereader has somefamiliaritywithCSS and JavaScript,
andisinterestedtolearnmoreaboutprogrammingwithJavaScriptorJava.
Thebookcanbeused
1. in web development courses for students of Computer Science or Information
Systemsandrelateddisciplines;
2. byJavaScriptdevelopersforlearningJava;
3. byJavadevelopersforlearningJavaScript;
4. byJavaScriptandJava(andPHP/Python/C#etc.)developersforlearning
– object-oriented(OO)programmingwithJavaScriptorJava,
– howtoimplementbasicinformationmanagementconceptsandbuildcom-
pletewebappswithplainJavaScriptorJava.
The book comes with the complete source code of six example apps that you can
runordownloadfromourwebserver.
https://doi.org/10.1515/9783110500325-202

Contents
Foreword VII
ListofFigures XIII
ListofTables XV
Part I:Associations
1 ReferencePropertiesandUnidirectionalAssociations 3
1.1 ReferencesandReferenceProperties 4
1.2 ReferentialIntegrity 6
1.3 ModelingReferencePropertiesasUnidirectionalAssociations 6
1.4 RepresentingUnidirectionalAssociationsasReference
Properties 8
1.5 AddingDirectionalitytoaNon-DirectedAssociation 9
1.6 OurRunningExample 10
1.7 EliminatingUnidirectionalAssociations 11
1.8 RenderingReferencePropertiesintheUserInterface 15
1.9 CollectionTypesforMulti-ValuedReferenceProperties 15
1.10 QuizQuestions 16
2 ImplementingUnidirectionalFunctionalAssociationswithPlainJS 19
2.1 NewJavaScriptElements 19
2.2 ImplementingSingle-ValuedReferenceProperties 22
2.3 MakeaJSClassModel 24
2.4 NewIssues 26
2.5 CodetheModel 26
2.6 CodetheViewandController 33
2.7 QuizQuestions 36
3 ImplementingUnidirectionalNon-FunctionalAssociationswithPlain
JS 38
3.1 ImplementingMulti-ValuedReferenceProperties 38
3.2 MakeaJSClassModel 39
3.3 NewIssues 40
3.4 CodetheModel 41
3.5 CodetheView 45
3.6 HowtoRuntheAppandGettheCode 51
3.7 PointsofAttention 52
X Contents
4 ImplementingUnidirectionalFunctionalAssociationswithJavaEE 53
4.1 ImplementingSingle-ValuedReferencePropertiesinJava 53
4.2 MakeaJavaEntityClassModel 54
4.3 NewIssues 55
4.4 WritetheModelCode 55
4.5 TheViewandControllerLayers 59
5 UnidirectionalNon-FunctionalAssociationswithJavaEE 67
5.1 ImplementingMulti-ValuedReferencePropertiesinJava 67
5.2 MakeaJavaEntityClassModel 68
5.3 NewIssues 69
5.4 WritetheModelCode 69
5.5 WritetheUserInterfaceCode 74
5.6 RuntheAppandGettheCode 76
5.7 SetsVersusOrderedSetsastheValuesofReference
Properties 77
6 UnidirectionalAssociationsPracticeProjects 79
6.1 AssignaDirectorandActorstoaMovie 79
6.2 AssignCitiesandaCapitaltoaCountry,andMemberstoan
Organization 80
7 BidirectionalAssociations 83
7.1 InverseReferenceProperties 83
7.2 MakinganOOClassModel 86
8 ImplementingBidirectionalAssociationswithPlainJS 91
8.1 MakeaJavaScriptClassModel 91
8.2 WritetheModelCode 92
8.3 ExploitInverseReferencePropertiesintheUserInterface 98
9 ImplementingBidirectionalAssociationswithJavaEE 100
9.1 MakeaJavaEntityClassModel 100
9.2 WritetheModelCode 102
9.3 ExploitingDerivedInverseReferencePropertiesintheUser
Interface 110
9.4 RuntheAppandGettheCode 112
10 SpecialTopicsonAssociations 113
10.1 Part-WholeAssociations 113
10.2 AssociationClasses 116