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package org.jooq;
import org.jetbrains.annotations.NotNull;
An enum that specifies the nullability of a DataType
. Author: Lukas Eder
/**
* An enum that specifies the nullability of a {@link DataType}.
*
* @author Lukas Eder
*/
public enum Nullability {
The data type is explicitly nullable.
/**
* The data type is explicitly nullable.
*/
@NotNull
@Support
NULL,
The data type is explicitly not nullable.
/**
* The data type is explicitly not nullable.
*/
@NotNull
@Support
NOT_NULL,
Default behaviour for data types.
The interpretation of this value depends on the context in which a DataType
is used:
CREATE TABLE
: The data type is implicitly nullable (or
explicitly, if the underlying database does not support implicit
nullability or defaults to implicit non-nullability).
ALTER TABLE .. ALTER COLUMN .. SET TYPE
: The data type's nullability will not be modified by jOOQ (but it may well be modified by the database, e.g. SQLDialect.MYSQL
or SQLDialect.SQLSERVER
).
/**
* Default behaviour for data types.
* <p>
* The interpretation of this value depends on the context in which a
* {@link DataType} is used:
* <ul>
* <li><code>CREATE TABLE</code>: The data type is implicitly nullable (or
* explicitly, if the underlying database does not support implicit
* nullability or defaults to implicit non-nullability).</li>
* <li><code>ALTER TABLE .. ALTER COLUMN .. SET TYPE</code>: The data type's
* nullability will not be modified by jOOQ (but it may well be modified by
* the database, e.g. {@link SQLDialect#MYSQL} or
* {@link SQLDialect#SQLSERVER}).</li>
* </ul>
*/
@NotNull
@Support
DEFAULT;
Get the explicit Nullability
corresponding to a boolean value. /**
* Get the explicit {@link Nullability} corresponding to a boolean value.
*/
@NotNull
public static Nullability of(boolean nullability) {
return nullability ? NULL : NOT_NULL;
}
Whether this nullability encodes an explicitly or implicitly nullable
type.
/**
* Whether this nullability encodes an explicitly or implicitly nullable
* type.
*/
public boolean nullable() {
return this != NOT_NULL;
}
}