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

java.lang.Object
  org.apache.derby.iapi.sql.dictionary.TupleDescriptor
      org.apache.derby.iapi.sql.dictionary.ConstraintDescriptor
          org.apache.derby.iapi.sql.dictionary.KeyConstraintDescriptor

All Implemented Interfaces:

Dependable, Dependent, Provider, UniqueTupleDescriptor

Direct Known Subclasses:

ForeignKeyConstraintDescriptor, ReferencedKeyConstraintDescriptor

public abstract class KeyConstraintDescriptor
extends ConstraintDescriptor

This interface is used to get information from a KeyConstraintDescriptor. A KeyConstraintDescriptor can represent a primary/unique/foreign key constraint.

Version:

0.1

Field Summary

private ConglomerateDescriptor	indexConglom
(package private) UUID	indexId interface to this class: public UUID getIndexId(); public ConglomerateDescriptor getIndexConglomerateDescriptor(DataDictionary dd) throws StandardException; public String getIndexUUIDString(); public int[] getKeyColumns();

Fields inherited from class org.apache.derby.iapi.sql.dictionary.ConstraintDescriptor

ALL, constraintId, constraintName, DISABLED, ENABLED, isEnabled, SYSCONSTRAINTS_STATE_FIELD, table

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

KeyConstraintDescriptor(DataDictionary dataDictionary, TableDescriptor table, java.lang.String constraintName, boolean deferrable, boolean initiallyDeferred, int[] referencedColumns, UUID constraintId, UUID indexId, SchemaDescriptor schemaDesc, boolean isEnabled)
Constructor for a KeyConstraintDescriptor

Method Summary

UUID	getConglomerateId() Get the UUID of the backing index, if one exists.
ConglomerateDescriptor	getIndexConglomerateDescriptor(DataDictionary dd) Gets the index conglomerate descriptor
UUID	getIndexId() Gets the UUID of the backing index for the constraint.
java.lang.String	getIndexUUIDString() Gets the UUID String of the backing index for the constraint.
boolean	hasBackingIndex() Does this constraint have a backing index?
java.lang.String	toString() Convert the SubConstraintDescriptor to a String.

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

areColumnsComparable, columnIntersects, deferrable, doColumnsIntersect, drop, getClassType, getColumnDescriptors, getConstraintName, getConstraintText, getConstraintType, getDependableFinder, getDescriptorName, getDescriptorType, getKeyColumns, getObjectID, getObjectName, getReferenceCount, getReferencedColumns, getSchemaDescriptor, getTableDescriptor, getTableId, getUUID, initiallyDeferred, isEnabled, isReferenced, isValid, makeInvalid, needsToFire, prepareToInvalidate, setDisabled, setEnabled

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, wait, wait, wait

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

isPersistent

Field Detail

indexId

UUID indexId

interface to this class:

1. public UUID getIndexId();
2. public ConglomerateDescriptor getIndexConglomerateDescriptor(DataDictionary dd)
throws StandardException;
3. public String getIndexUUIDString();
4. public int[] getKeyColumns();

indexConglom

private ConglomerateDescriptor indexConglom

Constructor Detail

KeyConstraintDescriptor

KeyConstraintDescriptor(DataDictionary dataDictionary,
                        TableDescriptor table,
                        java.lang.String constraintName,
                        boolean deferrable,
                        boolean initiallyDeferred,
                        int[] referencedColumns,
                        UUID constraintId,
                        UUID indexId,
                        SchemaDescriptor schemaDesc,
                        boolean isEnabled)

Constructor for a KeyConstraintDescriptor

Parameters:

dataDictionary - The data dictionary that this descriptor lives in

table - The descriptor of the table the constraint is on

constraintName - The name of the constraint.

deferrable - If the constraint can be deferred.

initiallyDeferred - If the constraint starts life deferred.

referencedColumns - columns that the constraint references

constraintId - UUID of constraint

indexId - The UUID for the backing index

schemaDesc - The SchemaDescriptor for the constraint

isEnabled - is this constraint enabled

Method Detail

getIndexId

public UUID getIndexId()

Gets the UUID of the backing index for the constraint.

Returns:

The UUID of the backing index for the constraint.

getIndexConglomerateDescriptor

public ConglomerateDescriptor getIndexConglomerateDescriptor(DataDictionary dd)
                                                      throws StandardException

Gets the index conglomerate descriptor

Returns:

the index conglomerate descriptor

Throws:

StandardException - on error

getIndexUUIDString

public java.lang.String getIndexUUIDString()

Gets the UUID String of the backing index for the constraint.

Returns:

The UUID String of the backing index for the constraint.

hasBackingIndex

public boolean hasBackingIndex()

Does this constraint have a backing index?

Specified by:

hasBackingIndex in class ConstraintDescriptor

Returns:

boolean Whether or not there is a backing index for this constraint.

getConglomerateId

public UUID getConglomerateId()

Get the UUID of the backing index, if one exists.

Specified by:

getConglomerateId in class ConstraintDescriptor

Returns:

The UUID of the backing index, if one exists, else null.

toString

public java.lang.String toString()

Convert the SubConstraintDescriptor to a String.

Overrides:

toString in class ConstraintDescriptor

Returns:

A String representation of this SubConstraintDescriptor