ru.curs.celesta.dbutils.adaptors.column

Class ColumnDefiner

java.lang.Object

ru.curs.celesta.dbutils.adaptors.column.ColumnDefiner

Direct Known Subclasses:

FireBirdColumnDefiner, MsSqlColumnDefiner, OraColumnDefiner

public abstract class ColumnDefiner
extends Object

Class responsible for generation of table column definition in different DBMS.

Constructor Summary

Constructors

Constructor and Description
ColumnDefiner()

Method Summary

Modifier and Type	Method and Description
abstract String	dbFieldType() Returns column field type, e.g.
abstract String	getDefaultDefinition(Column<?> c) Returns separately DEFAULT definition of the column.
String	getFullDefinition(Column<?> c) Returns full definition of the column (for column creation).
abstract String	getMainDefinition(Column<?> c) Returns column definition that contains name, type and NULL/NOT NULL ( without DEFAULT).
static String	join(String... ss) Concatenates strings separated by a space symbol.
String	nullable(Column<?> c) Whether the column is nullable.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ColumnDefiner

public ColumnDefiner()

Method Detail

dbFieldType

public abstract String dbFieldType()

Returns column field type, e.g. "boolean", "double","int" etc. depending on the DBMS in question.

Returns:

getMainDefinition

public abstract String getMainDefinition(Column<?> c)

Returns column definition that contains name, type and NULL/NOT NULL ( without DEFAULT). It is needed for the column change mechanism.

Parameters:

c - column.

getDefaultDefinition

public abstract String getDefaultDefinition(Column<?> c)

Returns separately DEFAULT definition of the column.

Parameters:

c - column.

getFullDefinition

public String getFullDefinition(Column<?> c)

Returns full definition of the column (for column creation).

Parameters:

c - column.

nullable

public String nullable(Column<?> c)

Whether the column is nullable.

Parameters:

c - column.

Returns:

"null" | "not null"

join

public static String join(String... ss)

Concatenates strings separated by a space symbol.

Parameters:

ss - strings array for concatenation in form of a free parameter.