org.apache.derby.catalog.types
Class AggregateAliasInfo

java.lang.Object
  org.apache.derby.catalog.types.AggregateAliasInfo

All Implemented Interfaces:

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

public class AggregateAliasInfo
extends java.lang.Object
implements AliasInfo, Formatable

Describe a G (Aggregate) alias. The AggregateAliasInfo maintains a version stamp so that it can evolve its persistent form over time.

See Also:

AliasInfo, Serialized Form

Field Summary

private TypeDescriptor	_forType
private TypeDescriptor	_returnType
private static 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

AggregateAliasInfo()
no-arg constructor for Formatable machinery

AggregateAliasInfo(TypeDescriptor forType, TypeDescriptor returnType)
Construct from pieces

Method Summary

TypeDescriptor	getForType()
java.lang.String	getMethodName() Get the name of the static method that the alias represents at the source database.
TypeDescriptor	getReturnType()
int	getTypeFormatId() Get the formatID which corresponds to this class.
boolean	isTableFunction() Return true if this alias is a Table Function.
void	readExternal(java.io.ObjectInput in) Read this object from a stream of stored objects.
void	setCollationTypeForAllStringTypes(int collationType) Set the collation type for string input and return types.
java.lang.String	toString() This is used by dblook to reconstruct the aggregate-specific parts of the ddl needed to recreate this alias.
void	writeExternal(java.io.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 Detail

FIRST_VERSION

private static final int FIRST_VERSION

See Also:

Constant Field Values

_forType

private TypeDescriptor _forType

_returnType

private TypeDescriptor _returnType

Constructor Detail

AggregateAliasInfo

public AggregateAliasInfo()

no-arg constructor for Formatable machinery

AggregateAliasInfo

public AggregateAliasInfo(TypeDescriptor forType,
                          TypeDescriptor returnType)

Construct from pieces

Method Detail

isTableFunction

public boolean isTableFunction()

Description copied from interface: AliasInfo

Return true if this alias is a Table Function.

Specified by:

isTableFunction in interface AliasInfo

getForType

public TypeDescriptor getForType()

getReturnType

public TypeDescriptor getReturnType()

setCollationTypeForAllStringTypes

public void setCollationTypeForAllStringTypes(int collationType)

Set the collation type for string input and return types.

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Read this object from a stream of stored objects.

Specified by:

readExternal in interface java.io.Externalizable

Parameters:

in - read this.

Throws:

java.io.IOException - thrown on error

java.lang.ClassNotFoundException - thrown on error

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Write this object to a stream of stored objects.

Specified by:

writeExternal in interface java.io.Externalizable

Parameters:

out - write bytes here.

Throws:

java.io.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 java.lang.String toString()

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

Overrides:

toString in class java.lang.Object

getMethodName

public java.lang.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.