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ORM JPA

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Rody Middelkoop
Rody Middelkoop

Presentation given at the minor EAD, ICA, HAN University

1 of 39
Object/Relational Mapping Java Persistence API Minor Enterprise Application Development
Understand ORM to use it ,[object Object],[object Object]
“ Modern” ORM Solutions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Why? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Entity Beans? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What do RDBs do well? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What do RDBs do badly? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data is important ,[object Object],[object Object]
The Goal ,[object Object],[object Object]
The Real Goal ,[object Object],[object Object]
Impedance Mismatch ,[object Object],[object Object],[object Object],[object Object],[object Object]
Inheritance ,[object Object],[object Object],B a1 C * id a1 * id A * id a1 b1 b1 c1 c1 A * id B * id C * id a1 b1 c1 Table per class hierarchy Table per class A a1 B b1 C c1
Entity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Entity Relationships ,[object Object],[object Object],[object Object],[object Object],[object Object]
Entity Manager ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Annotations Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
@Entity / @Table @Entity @Table(name=“PROSPECT”) public class Prospect extends Persistent { ... public Prospect() { ... } } MAUI.PROSPECT PROSPECT_ID NUMBER(18) LAST_UPD_BY NUMBER(18) LAST_UP_TS TIMESTAMP(9) STUDENT_ID NUMBER(18) ... ...
@Id ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
@Basic / @Column ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],MAUI.PROSPECT PROSPECT_ID NUMBER(18) ... ... HS_SELF_REPORTED_CLASS_SIZE NUMBER(5) HS_ANTICIPATED_YR_GRAD CHAR(4) ... ...
@Transient ,[object Object],[object Object]
@Enumerated ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
@Enumerated ... public class Prospect extends Persistent { ... @Enumerated(EnumType.STRING) @Column(name = "PRSP_STATUS_EN") ProspectStatusEnum prospectStatusEnum; ... } MAUI.PROSPECT ... ... PRSP_STATUS_EN VARCHAR(25) ... ...
@ManyToOne ... public class Prospect extends Persistent { @ManyToOne() @JoinColumn(name = "PURGE_SESSION_INFO_ID") private Session purgeSession; ... } @Entity @Table(name = "MAUI.SESSION_INFO") public class Session extends Persistent { ... } MAUI.SESSION_INFO SESSION_INFO_ID NUMBER(18) ... ... MAUI.PROSPECT PROSPECT_ID NUMBER(18) PK ... ... PURGE_SESSION_INFO_ID NUMBER(18) FK
@OneToOne ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],MAUI.STUDENT STUDENT_ID NUMBER(18) PK ... ... MAUI.PROSPECT PROSPECT_ID NUMBER(18) PK ... ... STUDENT_ID NUMBER(18) FK UNIQUE NOT NULL
@OneToMany public class Prospect extends Persistent { ... @OneToMany(mappedBy = &quot;prospect”) private Set<ProspectComment> prospectComments; } @Entity public class ProspectComment extends Persistent { ... @ManyToOne() @JoinColumn(name = &quot;PROSPECT_ID&quot;) private Prospect prospect; } MAUI.PRSP_COMMENT PRSP_COMMENT_ID NUMBER(18) PK PROSPECT_ID NUMBER(18) FK NOT NULL ... ... MAUI.PROSPECT PROSPECT_ID NUMBER(18) PK ... ...
@MappedSuperclass ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
@Inheritance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Bootstrapping Configuration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
@FetchType defaults ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
@FetchType defaults ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
<T> ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Outside-the-container APIs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Dynamic queries! ,[object Object],[object Object],[object Object],[object Object]
Ranged queries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
createNamedQuery(String) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
createNamedQuery(String) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Reasons for Object Persistence vs RDB ,[object Object],[object Object],[object Object],[object Object],[object Object]
Reasons For ORM vs OODB ,[object Object],[object Object],[object Object],[object Object],[object Object]
References ,[object Object],[object Object],[object Object]

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Contract First Modeling Services Using Uml
 

ORM JPA

  • 1. Object/Relational Mapping Java Persistence API Minor Enterprise Application Development
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  • 17. @Entity / @Table @Entity @Table(name=“PROSPECT”) public class Prospect extends Persistent { ... public Prospect() { ... } } MAUI.PROSPECT PROSPECT_ID NUMBER(18) LAST_UPD_BY NUMBER(18) LAST_UP_TS TIMESTAMP(9) STUDENT_ID NUMBER(18) ... ...
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  • 22. @Enumerated ... public class Prospect extends Persistent { ... @Enumerated(EnumType.STRING) @Column(name = &quot;PRSP_STATUS_EN&quot;) ProspectStatusEnum prospectStatusEnum; ... } MAUI.PROSPECT ... ... PRSP_STATUS_EN VARCHAR(25) ... ...
  • 23. @ManyToOne ... public class Prospect extends Persistent { @ManyToOne() @JoinColumn(name = &quot;PURGE_SESSION_INFO_ID&quot;) private Session purgeSession; ... } @Entity @Table(name = &quot;MAUI.SESSION_INFO&quot;) public class Session extends Persistent { ... } MAUI.SESSION_INFO SESSION_INFO_ID NUMBER(18) ... ... MAUI.PROSPECT PROSPECT_ID NUMBER(18) PK ... ... PURGE_SESSION_INFO_ID NUMBER(18) FK
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  • 25. @OneToMany public class Prospect extends Persistent { ... @OneToMany(mappedBy = &quot;prospect”) private Set<ProspectComment> prospectComments; } @Entity public class ProspectComment extends Persistent { ... @ManyToOne() @JoinColumn(name = &quot;PROSPECT_ID&quot;) private Prospect prospect; } MAUI.PRSP_COMMENT PRSP_COMMENT_ID NUMBER(18) PK PROSPECT_ID NUMBER(18) FK NOT NULL ... ... MAUI.PROSPECT PROSPECT_ID NUMBER(18) PK ... ...
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