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Manual
92

Retrieving JPA Entity Objects

using a lazy fetch type: @Entity class Employee { : @ManyToOne(fetch=FetchType.LAZY) private Employee manager; : } The default for non collection and map references is FetchType ... FetchType.LAZY in either @OneToOne or @ManyToOne annotations (currently ObjectDB does not distinguish
JPA Doc
86

javax.persistence.FetchType

javax.persistence Enum FetchType java.lang.Object java.lang.EnumFetchType> javax.persistence.FetchType Implemented Interfaces: Serializable, Comparable<FetchType ... See Also: Basic ElementCollection ManyToMany OneToMany ManyToOne OneToOne FetchType EAGER Defines that data
JPA Doc
81

values()

Static Method javax.persistence.FetchType FetchType[] values() Returns an array containing the constants of this enum type. This method may be used to iterate over the constants as follows: for (FetchType c : FetchType.values()) System.out.println(c) Returns: an array containing the constants of this enum type, in the order they are declared
JPA Doc
79

valueOf(name)

Static Method javax.persistence.FetchType FetchType valueOf(   String name ) Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. Parameters: name - the name of the enum constant to be returned
JPA Doc
77

FetchType.EAGER

Enum Constant javax.persistence.FetchType EAGER Defines that data must be eagerly fetched. Since: JPA 1.0
JPA Doc
77

FetchType.LAZY

Enum Constant javax.persistence.FetchType LAZY Defines that data can be lazily fetched. Since: JPA 1.0
JPA Doc
52

JPA Annotations for Relationships

Reference (JavaDoc) of JPA 2 relationship annotations, including @ManyToMany, @ManyToOne, @OneToMany, @OneToOne, @OrderBy and @MapKey.
Forum
27

Problem with @Basic(fetch = FetchType.LAZY)

I have a class where two fields are annotated with @Basic(fetch = FetchType.LAZY ... ; @Basic(fetch = FetchType.LAZY) private String description; @Basic(fetch = FetchType.LAZY ... = FetchType.LAZY hint. Am I doing something wrong? (I am using objectdb-2.3.6_10)   tia, Wim   LAZY in JPA
Forum
27

@OneToMany(fetch = FetchType.LAZY) list is always null

Hello. @OneToMany(fetch = FetchType.LAZY) doesn't work when using EJB or something else related ... ") private int id; @OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL) private List ... = FetchType.LAZY, cascade = CascadeType.ALL) private ByteData bydaData; public Parent
Forum
26

@Lob @Basic(fetch = FetchType.LAZY) is loaded when it's not needed

Hello. I have a class Thing that contains OneToMany list of classes Photo. Photo contains  @Lob @Basic(fetch = FetchType.LAZY) private byte[] content; And after some queries with Thing ... of the photos despite of using fetch = FetchType.LAZY. How can I fix this memory issue? FetchType.LAZY