[#JAVAFIVEPLUGIN-64] JDO2 : Support @Embedded use of Fields - DataNucleus JIRA

JPOX Java5 (ARCHIVED)

JDO2 : Support @Embedded use of Fields

Created: 29/May/07 02:10 PM Updated: 04/Jul/07 01:52 PM Resolved: 07/Jun/07 07:12 PM

Component/s:

JDO

Affects Version/s:

1.2.0-beta-2

Fix Version/s:

1.2.0-beta-3

Forum Thread URL:

http://www.jpox.org/servlet/forum/viewthread?thread=4368

Description

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Right now it is not possible to define embeddings of field information using the Java5 Annotations and JDO. For details, see the attached thread.

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Andy Jefferson added a comment - 07/Jun/07 03:18 PM

@Field annotation now has "columns" field of type Column[]. JPOX CVS now supports @Embedded with "fields" being set, and with @Field having "columns"

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Andy Jefferson added a comment - 07/Jun/07 07:12 PM

In CVS HEAD. An example

@PersistenceCapable
public class Computer
{
    @Field
    @Column(name="ID")
    @PrimaryKey
    private long id; // Used by application identity

    @Field
    @Column(name="OPERATING_SYSTEM")
    private String operatingSystem;

    @Field
    @Embedded(nullIndicatorColumn="GRAPHICS_MANUFACTURER", ownerField="computer",
        fields={
            @Field(embeddedFieldName="manufacturer", columns={@Column(name="GRAPHICS_MANUFACTURER")}),
            @Field(embeddedFieldName="type", columns={@Column(name="GRAPHICS_TYPE")})
        })
    private ComputerCard graphicsCard;

    @Field
    @Embedded(nullIndicatorColumn="SOUND_MANUFACTURER", ownerField="computer",
        fields={
            @Field(embeddedFieldName="manufacturer", columns={@Column(name="SOUND_MANUFACTURER")}),
            @Field(embeddedFieldName="type", columns={@Column(name="SOUND_TYPE")})
        })
    private ComputerCard soundCard;

    ...
}

@PersistenceCapable
public class ComputerCard
{
    public static final int ISA_CARD = 0;
    public static final int PCI_CARD = 1;
    public static final int AGP_CARD = 2;

    @Field
    private String manufacturer;

    @Field
    private int type;

    @Field
    private Computer computer;

    ...
}