Package org.apache.derby.catalog.types

Class UDTAliasInfo

java.lang.Object

org.apache.derby.catalog.types.UDTAliasInfo

All Implemented Interfaces:

Externalizable, Serializable, AliasInfo, Formatable, TypedFormat

public class UDTAliasInfo
extends Object
implements AliasInfo, Formatable

Describe an A (Abstract Data Type) alias. For the first release of USer Defined Types, this is a vacuous object. Future revs may add real information to this object. The UDTAliasInfo maintains a version stamp so that it can evolve its persistent form over time.

See Also:

• AliasInfo
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	FIRST_VERSION

Fields inherited from interface org.apache.derby.catalog.AliasInfo

ALIAS_NAME_SPACE_AGGREGATE_AS_CHAR, ALIAS_NAME_SPACE_AGGREGATE_AS_STRING, ALIAS_NAME_SPACE_FUNCTION_AS_CHAR, ALIAS_NAME_SPACE_FUNCTION_AS_STRING, ALIAS_NAME_SPACE_PROCEDURE_AS_CHAR, ALIAS_NAME_SPACE_PROCEDURE_AS_STRING, ALIAS_NAME_SPACE_SYNONYM_AS_CHAR, ALIAS_NAME_SPACE_SYNONYM_AS_STRING, ALIAS_NAME_SPACE_UDT_AS_CHAR, ALIAS_NAME_SPACE_UDT_AS_STRING, ALIAS_TYPE_AGGREGATE_AS_CHAR, ALIAS_TYPE_AGGREGATE_AS_STRING, ALIAS_TYPE_FUNCTION_AS_CHAR, ALIAS_TYPE_FUNCTION_AS_STRING, ALIAS_TYPE_PROCEDURE_AS_CHAR, ALIAS_TYPE_PROCEDURE_AS_STRING, ALIAS_TYPE_SYNONYM_AS_CHAR, ALIAS_TYPE_SYNONYM_AS_STRING, ALIAS_TYPE_UDT_AS_CHAR, ALIAS_TYPE_UDT_AS_STRING

Constructor Summary

Constructors

Constructor	Description
UDTAliasInfo()

Method Summary

Modifier and Type	Method	Description
String	getMethodName()	Get the name of the static method that the alias represents at the source database.
int	getTypeFormatId()	Get the formatID which corresponds to this class.
boolean	isTableFunction()	Return true if this alias is a Table Function.
void	readExternal(ObjectInput in)	Read this object from a stream of stored objects.
String	toString()	This is used by dblook to reconstruct the UDT-specific parts of the ddl needed to recreate this alias.
void	writeExternal(ObjectOutput out)	Write this object to a stream of stored objects.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

FIRST_VERSION

private static final int FIRST_VERSION

See Also:

• Constant Field Values

Constructor Details

UDTAliasInfo

public UDTAliasInfo()

Method Details

isTableFunction

public boolean isTableFunction()

Description copied from interface: AliasInfo

Return true if this alias is a Table Function.

Specified by:

isTableFunction in interface AliasInfo

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Read this object from a stream of stored objects.

Specified by:

readExternal in interface Externalizable

Parameters:

in - read this.

Throws:

IOException - thrown on error

ClassNotFoundException - thrown on error

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Write this object to a stream of stored objects.

Specified by:

writeExternal in interface Externalizable

Parameters:

out - write bytes here.

Throws:

IOException - thrown on error

getTypeFormatId

public int getTypeFormatId()

Get the formatID which corresponds to this class.

Specified by:

getTypeFormatId in interface TypedFormat

Returns:

the formatID of this class

toString

public String toString()

This is used by dblook to reconstruct the UDT-specific parts of the ddl needed to recreate this alias.

Overrides:

toString in class Object

getMethodName

public String getMethodName()

Description copied from interface: AliasInfo

Get the name of the static method that the alias represents at the source database. (Only meaningful for method aliases )

Specified by:

getMethodName in interface AliasInfo

Returns:

The name of the static method that the alias represents at the source database.