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.


Built on Mon 2007-06-04 09:58:47+0400, from revision ???

Apache Derby V10.1 Engine Documentation - Copyright © 1997,2005 The Apache Software Foundation or its licensors, as applicable.