Use a Basic Mapping to map an attribute directly to a database column. Basic mappings may be used only with the following attribute types:
Java primitive types and wrappers of the primitive types
java.lang.String, java.math.BigInteger
java.math.BigDecimal
java.util.Date
java.util.Calendar, java.sql.Date
java.sql.Time
java.sql.Timestamp
byte[]
Byte[]
char[]
Character[]
enums
any other type that implements Serializable
To create a basic mapping:
In the JPA Structure view, right-click the field to map. Select Map As > Basic. The JPA Details view (for attributes) displays the properties for the selected field.
Use this table to complete the remaining fields on the JPA Details view.
Property | Description | Default |
---|---|---|
Entity Map Hyperlink | Defines this mapping as a Basic Mapping.
This corresponds to the |
Basic |
Column | The database column mapped to the entity attribute. See "Column" for details. | By default, the Column is assumed to be named identically to the attribute and always included in the INSERT and UPDATE statements. |
Table | Name of the database table. | |
Fetch | Defines how data is loaded from the database. See "Fetch Type" for details.
|
Eager |
Optional | Specifies if this field is can be null. | Yes |
Temporal | Specifies the type of data. See "Temporal" for details.
|
|
Lob | Specifies if this is a large objects (BLOB or CLOB). See "Lob" for details. |
Eclipse adds the following annotations to the field:
@Column(name="<COLUMN_NAME>", table="<COLUMN_TABLE>", insertable=<INSERTABLE>, updatable=<UPDATABLE>) @Basic(fetch=FetchType.<FETCH_TYPE>, optional = <OPTIONAL>) @Temporal(TemporalType.<TEMPORAL>)