DefaultDescriptor (Apache Derby V10.14 Internals)

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

All Implemented Interfaces:

Dependable, Dependent, Provider
```
public final class DefaultDescriptor
extends UniqueTupleDescriptor
implements Provider, Dependent
```
This interface is used to get information from a DefaultDescriptor.

Field Summary

Fields
Modifier and Type Field Description

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

Fields
Modifier and Type	Field	Description
`private int`	`columnNumber`
`private UUID`	`defaultUUID`
`private UUID`	`tableUUID`

Constructor Summary

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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 interface org.apache.derby.catalog.Dependable
isPersistent

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from class org.apache.derby.iapi.sql.dictionary.TupleDescriptor
getColumnDependableFinder, getDataDictionary, getDependableFinder, getDescriptorName, getDescriptorType, isPersistent, setDataDictionary

- 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 class 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

Class DefaultDescriptor

Field Summary

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

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Detail

columnNumber

defaultUUID

tableUUID

Constructor Detail

DefaultDescriptor

Method Detail

getUUID

getTableUUID

getColumnNumber

toString

getDependableFinder

getObjectName

getObjectID

getClassType

isValid

prepareToInvalidate

makeInvalid