About Group Id

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Tutorial
5

Step 2: Define a JPA Entity Class

.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity public ... ; // Persistent Fields: @Id @GeneratedValue Long id; private String name; private ... in the database. Besides the @Entity annotation and the id field (and its annotations) - the Guest
Tutorial
5

Step 2: Define a JPA Entity Class

.GeneratedValue; import javax.persistence.Id; @Entity public class Guest implements Serializable { private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private String name; private Date signingDate
Tutorial
5

Step 2: Define a JPA Entity Class [2011-02-11]

; @Id @GeneratedValue private long id; private int x; private int y; public ... ; } public Long getId() { return id; } public int getX() { return x ... should represent Point objects in the database. Besides the @Entity annotation and the id field
Tutorial
5

Step 2: Define a JPA Entity Class

; @Id @GeneratedValue private long id; private int x; private int y; public ... ; } public Long getId() { return id; } public int getX() { return x ... should represent Point objects in the database. Besides the @Entity annotation and the id field
JDO Doc
5

javax.jdo.annotations.FetchGroup

javax.jdo.annotations Annotation FetchGroup Target: Classes Annotation for the fetch group of a class. Corresponds to the xml element "fetch-group". Since: JDO 2.1 String[] fetchGroups Fetch groups to be nested (included) in this fetch group. Fetch groups to be nested (included) in this fetch group
JPA Doc
4

javax.persistence.JoinColumns

javax.persistence Annotation JoinColumns Target: Fields (including property get methods) Defines mapping for composite foreign keys. This annotation groups JoinColumn annotations for the same ... ({ @JoinColumn(name="ADDR_ID", referencedColumnName="ID"), @JoinColumn(name="ADDR_ZIP
JPA Doc
4

javax.persistence.PrimaryKeyJoinColumns

get methods) Groups PrimaryKeyJoinColumn annotations. It is used to map composite foreign keys ... ") @PrimaryKeyJoinColumns({ @PrimaryKeyJoinColumn(name="CUST_ID", referencedColumnName="ID"), @PrimaryKeyJoinColumn(name="CUST_TYPE", referencedColumnName
Tutorial
4

Step 2: Entity Class and Persistence Unit

.GeneratedValue; import javax.persistence.Id; @Entity public class Guest implements Serializable { private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private String name; private Date signingDate; // Constructors
Tutorial
4

Step 2: Entity Class and Persistence Unit

.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity ... ; // Persistent Fields: @Id @GeneratedValue Long id; private String name
Tutorial
4

Step 2: Entity Class and Persistence Unit

.persistence.Id; @Entity public class Guest implements Serializable { private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id