io.requery

Annotation Type Column

@Documented
 @Target(value={FIELD,METHOD})
 @Retention(value=RUNTIME)
public @interface Column

Indicates a field as being a column in a database table.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
String	collate
String	definition
ForeignKey[]	foreignKey
boolean	index
int	length
String	name
boolean	nullable
boolean	unique
String	value

Element Detail

name

public abstract String name

Returns:

Name of the column. If empty then defaults to the field name during table definition.

Default:

""

nullable

public abstract boolean nullable

Returns:

true if this column is nullable or false otherwise. Defaults to true (no constraint).

Default:

true

unique

public abstract boolean unique

Returns:

true if this column is uniquely constrained false otherwise.

Default:

false

index

public abstract boolean index

Returns:

true if this column is indexed false otherwise. Use Index to define the index options.

Default:

false

length

public abstract int length

Returns:

optional fixed length for the column.

Default:

0

value

public abstract String value

Returns:

optional default value expression for the column used during table creation. example:

     @Column(value = "now()")
     protected Timestamp timestamp
 

Default:

""

collate

public abstract String collate

Returns:

optional collation type for the column, types varies depending on the platform.

Default:

""

definition

public abstract String definition

Returns:

optional table column definition used during table generation.

Default:

""

foreignKey

public abstract ForeignKey[] foreignKey

Returns:

optional foreign key constraints for this column.

Default:

{}