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138

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 wim DC Wim
135

Is there any restriction when using fetch=FetchType.LAZY ?

Hi, I came across a weird behavior when using fetch=FetchType.LAZY in a complex code. However I ... object declaration @OneToMany(fetch=FetchType.EAGER, cascade = CascadeType.ALL) private ... @OneToMany(fetch=FetchType.LAZY, cascade = CascadeType.ALL) private LinkedList<OdbObject
135

@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 ... and setters } public class Parent { // ...id @OneToOne(fetch = FetchType.LAZY, cascade
85

javax.persistence.FetchType

javax.persistence Enum FetchType java.lang.Object java.lang.Enum<javax.persistence.FetchType> javax.persistence.FetchType Implemented Interfaces: Serializable, Comparable<FetchType ... ElementCollection ManyToMany OneToMany ManyToOne OneToOne FetchType EAGER Defines that data
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
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
77

FetchType.LAZY

Enum Constant javax.persistence.FetchType LAZY Defines that data can be lazily fetched. Since: JPA 1.0
77

FetchType.EAGER

Enum Constant javax.persistence.FetchType EAGER Defines that data must be eagerly fetched. Since: JPA 1.0
66

Retrieving JPA Entity Objects

retrieval by using a lazy fetch type: @Entity class Employee { : @ManyToOne(fetch=FetchType ... is FetchType.EAGER, indicating that the retrieval operation is cascaded through the field. Explicitly specifying FetchType.LAZY in either @OneToOne or @ManyToOne annotations (currently ObjectDB does not
32

JPA Annotations for Relationships

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

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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