org.apache.derby.iapi.services.io
Interface Storable

All Superinterfaces:

java.io.Externalizable, Formatable, java.io.Serializable, TypedFormat

All Known Subinterfaces:

BitDataValue, BooleanDataValue, ConcatableDataValue, Conglomerate, DataValueDescriptor, DateTimeDataValue, NumberDataValue, RefDataValue, RowLocation, StaticCompiledOpenConglomInfo, StringDataValue, UserDataValue, XMLDataValue

All Known Implementing Classes:

B2IStaticCompiledInfo, BinaryOrderableWrapper, DataType, GenericConglomerate, Heap, HeapRowLocation, NumberDataType, SQLBinary, SQLBoolean, SQLChar, SQLDate, SQLRef, SQLTime, SQLTimestamp, UserType, XML

public interface Storable

extends Formatable

Formatable for holding SQL data (which may be null).

See Also:

Formatable

Method Summary

boolean	isNull() Return whether the value is null or not.
void	restoreToNull() Restore this object to its (SQL)null value.

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

Methods inherited from interface org.apache.derby.iapi.services.io.TypedFormat

getTypeFormatId

Method Detail

isNull

public boolean isNull()

Return whether the value is null or not.

Returns:

true if the value is null and false otherwise.

restoreToNull

public void restoreToNull()

Restore this object to its (SQL)null value.