org.apache.derby.iapi.sql.dictionary
Class DefaultDescriptor

java.lang.Object
  org.apache.derby.iapi.sql.dictionary.TupleDescriptor
      org.apache.derby.iapi.sql.dictionary.DefaultDescriptor

All Implemented Interfaces:

Dependable, Dependent, Provider, UniqueTupleDescriptor

public final class DefaultDescriptor
extends TupleDescriptor
implements UniqueTupleDescriptor, Provider, Dependent

This interface is used to get information from a DefaultDescriptor.

Field Summary

private int	columnNumber
private UUID	defaultUUID
private UUID	tableUUID

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

ACTIVATION, ALIAS, COLUMNS_IN_TABLE, COLUMNS_PERMISSION, CONGLOMERATE, CONSTRAINT, DEFAULT, FILE, HEAP, INDEX, PERM, PREPARED_STATEMENT, ROLE_GRANT, ROUTINE_PERMISSION, SCHEMA, SEQUENCE, STORED_PREPARED_STATEMENT, TABLE, TABLE_PERMISSION, TRIGGER, VIEW

Constructor Summary

DefaultDescriptor(DataDictionary dataDictionary, UUID defaultUUID, UUID tableUUID, int columnNumber)
Constructor for a DefaultDescriptor

Method Summary

java.lang.String	getClassType() Get the provider's type.
int	getColumnNumber() Get the column number of the column.
DependableFinder	getDependableFinder() Get an object which can be written to disk and which, when read from disk, will find or reconstruct this in-memory Dependable.
UUID	getObjectID() Get the provider's UUID
java.lang.String	getObjectName() Return the name of this Provider.
UUID	getTableUUID() Get the UUID of the table.
UUID	getUUID() Get the UUID of the default.
boolean	isValid() Check that all of the dependent's dependencies are valid.
void	makeInvalid(int action, LanguageConnectionContext lcc) Mark the dependent as invalid (due to at least one of its dependencies being invalid).
void	prepareToInvalidate(Provider p, int action, LanguageConnectionContext lcc) Prepare to mark the dependent as invalid (due to at least one of its dependencies being invalid).
java.lang.String	toString() Convert the DefaultDescriptor to a String.

Methods inherited from class org.apache.derby.iapi.sql.dictionary.TupleDescriptor

getColumnDependableFinder, getDataDictionary, getDependableFinder, getDescriptorName, getDescriptorType, isPersistent, setDataDictionary

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.derby.catalog.Dependable

isPersistent

Field Detail

columnNumber

private final int columnNumber

defaultUUID

private final UUID defaultUUID

tableUUID

private final UUID tableUUID

Constructor Detail

DefaultDescriptor

public DefaultDescriptor(DataDictionary dataDictionary,
                         UUID defaultUUID,
                         UUID tableUUID,
                         int columnNumber)

Constructor for a DefaultDescriptor

Parameters:

dataDictionary - the DD

defaultUUID - The UUID of the default

tableUUID - The UUID of the table

columnNumber - The column number of the column that the default is for

Method Detail

getUUID

public UUID getUUID()

Get the UUID of the default.

Specified by:

getUUID in interface UniqueTupleDescriptor

Returns:

The UUID of the default.

getTableUUID

public UUID getTableUUID()

Get the UUID of the table.

Returns:

The UUID of the table.

getColumnNumber

public int getColumnNumber()

Get the column number of the column.

Returns:

The column number of the column.

toString

public java.lang.String toString()

Convert the DefaultDescriptor to a String.

Overrides:

toString in class java.lang.Object

Returns:

A String representation of this DefaultDescriptor

getDependableFinder

public DependableFinder getDependableFinder()

Description copied from interface: Dependable

Get an object which can be written to disk and which, when read from disk, will find or reconstruct this in-memory Dependable.

Specified by:

getDependableFinder in interface Dependable

Returns:

the stored form of this provider

See Also:

Dependable.getDependableFinder()

getObjectName

public java.lang.String getObjectName()

Return the name of this Provider. (Useful for errors.)

Specified by:

getObjectName in interface Dependable

Returns:

String The name of this provider.

getObjectID

public UUID getObjectID()

Get the provider's UUID

Specified by:

getObjectID in interface Dependable

Returns:

The provider's UUID

getClassType

public java.lang.String getClassType()

Get the provider's type.

Specified by:

getClassType in interface Dependable

Returns:

char The provider's type.

isValid

public boolean isValid()

Check that all of the dependent's dependencies are valid.

Specified by:

isValid in interface Dependent

Returns:

true if the dependent is currently valid

prepareToInvalidate

public void prepareToInvalidate(Provider p,
                                int action,
                                LanguageConnectionContext lcc)
                         throws StandardException

Prepare to mark the dependent as invalid (due to at least one of its dependencies being invalid).

Specified by:

prepareToInvalidate in interface Dependent

Parameters:

action - The action causing the invalidation

p - the provider

lcc - The LanguageConnectionContext

Throws:

StandardException - thrown if unable to make it invalid

makeInvalid

public void makeInvalid(int action,
                        LanguageConnectionContext lcc)
                 throws StandardException

Mark the dependent as invalid (due to at least one of its dependencies being invalid). Always an error for a constraint -- should never have gotten here.

Specified by:

makeInvalid in interface Dependent

Parameters:

action - The action causing the invalidation

lcc - The LanguageConnectionContext

Throws:

StandardException - thrown if called in sanity mode