org.apache.derby.iapi.sql.dictionary

Class FileInfoDescriptor

java.lang.Object

org.apache.derby.iapi.sql.dictionary.TupleDescriptor

org.apache.derby.iapi.sql.dictionary.FileInfoDescriptor

All Implemented Interfaces:

Dependable, Provider, UniqueSQLObjectDescriptor, UniqueTupleDescriptor

public final class FileInfoDescriptor
extends TupleDescriptor
implements Provider, UniqueSQLObjectDescriptor

A Descriptor for a file that has been stored in the database.

Field Summary

Fields

Modifier and Type	Field and Description
private long	generationId
private UUID	id external interface to this class: public long getGenerationId();
static int	JAR_FILE_TYPE A type tho indicate the file is a jar file
private SchemaDescriptor	sd
private java.lang.String	sqlName

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

Constructors

Constructor and Description
FileInfoDescriptor(DataDictionary dataDictionary, UUID id, SchemaDescriptor sd, java.lang.String sqlName, long generationId) Constructor for a FileInfoDescriptor.

Method Summary

Modifier and Type	Method and Description
java.lang.String	getClassType() Get the unique class id for the Dependable.
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.
java.lang.String	getDescriptorName()
java.lang.String	getDescriptorType() Each descriptor must identify itself with its type; i.e index, check constraint whatever.
long	getGenerationId() Gets the generationId for the current version of this file.
java.lang.String	getName() Get the name of this object.
UUID	getObjectID() Get the UUID of this Dependable OBJECT.
java.lang.String	getObjectName() Get the name of this Dependable OBJECT.
SchemaDescriptor	getSchemaDescriptor() Get the objects schema descriptor
UUID	getUUID() Return the UUID for this Descriptor

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

getColumnDependableFinder, getDataDictionary, getDependableFinder, isPersistent, setDataDictionary

Methods inherited from class java.lang.Object

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

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

isPersistent

Field Detail

JAR_FILE_TYPE

public static final int JAR_FILE_TYPE

A type tho indicate the file is a jar file

See Also:

Constant Field Values

id

private final UUID id

external interface to this class:

1. public long getGenerationId();

sd

private final SchemaDescriptor sd

sqlName

private final java.lang.String sqlName

generationId

private final long generationId

Constructor Detail

FileInfoDescriptor

public FileInfoDescriptor(DataDictionary dataDictionary,
                          UUID id,
                          SchemaDescriptor sd,
                          java.lang.String sqlName,
                          long generationId)

Constructor for a FileInfoDescriptor.

Parameters:

dataDictionary - The data dictionary that this descriptor lives in

id - The id for this file

sd - The schema for this file.

sqlName - The SQL name of this file.

generationId - The generation id for the version of the file this describes.

Method Detail

getSchemaDescriptor

public SchemaDescriptor getSchemaDescriptor()

Description copied from interface: UniqueSQLObjectDescriptor

Get the objects schema descriptor

Specified by:

getSchemaDescriptor in interface UniqueSQLObjectDescriptor

Returns:

the schema descriptor

getName

public java.lang.String getName()

Description copied from interface: UniqueSQLObjectDescriptor

Get the name of this object. E.g. for a table descriptor, this will be the table name.

Specified by:

getName in interface UniqueSQLObjectDescriptor

Returns:

the name

getUUID

public UUID getUUID()

Description copied from interface: UniqueTupleDescriptor

Return the UUID for this Descriptor

Specified by:

getUUID in interface UniqueTupleDescriptor

Returns:

the uuid

See Also:

UniqueTupleDescriptor.getUUID()

getGenerationId

public long getGenerationId()

Gets the generationId for the current version of this file. The triple (schemaName,SQLName,generationId) are unique for the life of this database.

Returns:

the generationId for this file

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:

A Finder object that can be written to disk if this is a Persistent Dependable. Null if this is not a persistent dependable.

See Also:

Dependable.getDependableFinder()

getObjectName

public java.lang.String getObjectName()

Description copied from interface: Dependable

Get the name of this Dependable OBJECT. This is useful for diagnostic messages.

Specified by:

getObjectName in interface Dependable

Returns:

Name of Dependable OBJECT.

See Also:

Dependable.getObjectName()

getObjectID

public UUID getObjectID()

Description copied from interface: Dependable

Get the UUID of this Dependable OBJECT.

Specified by:

getObjectID in interface Dependable

Returns:

UUID of this OBJECT.

See Also:

Dependable.getObjectID()

getClassType

public java.lang.String getClassType()

Description copied from interface: Dependable

Get the unique class id for the Dependable. Every Dependable belongs to a class of Dependables.

Specified by:

getClassType in interface Dependable

Returns:

type of this Dependable.

See Also:

Dependable.getClassType()

getDescriptorType

public java.lang.String getDescriptorType()

Description copied from class: TupleDescriptor

Each descriptor must identify itself with its type; i.e index, check constraint whatever.

Overrides:

getDescriptorType in class TupleDescriptor

See Also:

TupleDescriptor.getDescriptorType()

getDescriptorName

public java.lang.String getDescriptorName()

Overrides:

getDescriptorName in class TupleDescriptor

See Also:

TupleDescriptor.getDescriptorName()