@Retention(CLASS) @Target({FIELD})
public @interface Column
Renames or constrains an
@Entity field’s column. Optional – when absent,
the column name defaults to the field name and the type is inferred from
the Java field type (String -> TEXT, int/long -> INTEGER,
float/double -> REAL, boolean -> INTEGER, byte[] -> BLOB,
java.util.Date -> INTEGER).Methods
public abstract String name() default "" | Column name. |
public abstract boolean nullable() default true | When false the column gets a NOT NULL constraint at table-create time. |
public abstract boolean unique() default false | Creates a unique index when the managed schema is created. |
public abstract String type() default "" | Optional explicit SQL type. |
Method details
name
public abstract String name() default ""Column name. Defaults to the field name when blank.
nullable
public abstract boolean nullable() default trueWhen false the column gets a
NOT NULL constraint at table-create time.unique
public abstract boolean unique() default falseCreates a unique index when the managed schema is created.
type
public abstract String type() default ""Optional explicit SQL type. Use the SQLite type names (
TEXT,
INTEGER, REAL, BLOB, NUMERIC). When blank the processor infers
the type from the field’s Java type.