org.axiondb.engine.indexes

Class ObjectBTreeIndex

java.lang.Object

org.axiondb.event.BaseTableModificationListener

org.axiondb.engine.indexes.BaseIndex

org.axiondb.engine.indexes.BaseBTreeIndex

org.axiondb.engine.indexes.ObjectBTreeIndex

All Implemented Interfaces:

TableModificationListener, Index

Direct Known Subclasses:

StringBTreeIndex

public class ObjectBTreeIndex
extends BaseBTreeIndex
implements TableModificationListener

A B-Tree indexover Object keys.

Version:

$Revision: 1.8 $ $Date: 2005/12/20 18:32:39 $

Field Summary

Fields

Modifier and Type	Field and Description
protected int	_minimizationFactor

Fields inherited from interface org.axiondb.Index

ARRAY, BTREE, DEFAULT, TTREE

Constructor Summary

Constructors

Constructor and Description
ObjectBTreeIndex(java.lang.String name, Column column, boolean unique)
ObjectBTreeIndex(java.lang.String name, Column column, boolean unique, java.io.File dataDirectory)

Method Summary

Modifier and Type	Method and Description
void	changeRowId(Table table, Row row, int oldId, int newId)
protected ObjectBTree	createTree(java.io.File dataDirectory, java.lang.String name, int minimizationFactor, DataType dataType)
ObjectBTree	getBTree()
IndexLoader	getIndexLoader()
RowIterator	getInorderRowIterator(RowSource source) Returns a RowIteratorwhich is inorder traversal of keys,
protected java.lang.Object	getNullKey()
RowIterator	getRowIterator(RowSource source, Function function, java.lang.Object value) Returns a RowIteratorover the indexed rows, limited by the given ComparisonOperator/value pair, using the default sort order.
void	rowDeleted(RowEvent event)
void	rowInserted(RowEvent event)
void	rowUpdated(RowEvent event)
void	truncate()

Methods inherited from class org.axiondb.engine.indexes.BaseBTreeIndex

getType, save, saveAfterTruncate, supportsFunction

Methods inherited from class org.axiondb.engine.indexes.BaseIndex

getComparator, getDataType, getIndexedColumn, getName, isUnique

Methods inherited from class org.axiondb.event.BaseTableModificationListener

columnAdded, constraintAdded, constraintRemoved

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axiondb.event.TableModificationListener

columnAdded, constraintAdded, constraintRemoved

Methods inherited from interface org.axiondb.Index

getIndexedColumn, getName, isUnique

Field Detail

_minimizationFactor

protected int _minimizationFactor

Constructor Detail

ObjectBTreeIndex

public ObjectBTreeIndex(java.lang.String name,
                        Column column,
                        boolean unique)
                 throws AxionException

Throws:

AxionException

ObjectBTreeIndex

public ObjectBTreeIndex(java.lang.String name,
                        Column column,
                        boolean unique,
                        java.io.File dataDirectory)
                 throws AxionException

Throws:

AxionException

Method Detail

changeRowId

public final void changeRowId(Table table,
                              Row row,
                              int oldId,
                              int newId)
                       throws AxionException

Specified by:

changeRowId in interface Index

Throws:

AxionException

getBTree

public final ObjectBTree getBTree()

getIndexLoader

public IndexLoader getIndexLoader()

Specified by:

getIndexLoader in interface Index

Specified by:

getIndexLoader in class BaseIndex

getInorderRowIterator

public final RowIterator getInorderRowIterator(RowSource source)
                                        throws AxionException

Description copied from interface: Index

Returns a RowIteratorwhich is inorder traversal of keys,

Specified by:

getInorderRowIterator in interface Index

Specified by:

getInorderRowIterator in class BaseIndex

Parameters:

source - table/view for which we need to get inorder traversal

Returns:

Throws:

AxionException

getRowIterator

public final RowIterator getRowIterator(RowSource source,
                                        Function function,
                                        java.lang.Object value)
                                 throws AxionException

Description copied from interface: Index

Returns a RowIteratorover the indexed rows, limited by the given ComparisonOperator/value pair, using the default sort order.

Specified by:

getRowIterator in interface Index

Specified by:

getRowIterator in class BaseIndex

value - the value to compare the indexed column to

Throws:

AxionException

rowDeleted

public final void rowDeleted(RowEvent event)
                      throws AxionException

Specified by:

rowDeleted in interface TableModificationListener

Overrides:

rowDeleted in class BaseTableModificationListener

Throws:

AxionException

rowInserted

public final void rowInserted(RowEvent event)
                       throws AxionException

Specified by:

rowInserted in interface TableModificationListener

Overrides:

rowInserted in class BaseTableModificationListener

Throws:

AxionException

rowUpdated

public final void rowUpdated(RowEvent event)
                      throws AxionException

Specified by:

rowUpdated in interface TableModificationListener

Overrides:

rowUpdated in class BaseTableModificationListener

Throws:

AxionException

truncate

public void truncate()
              throws AxionException

Specified by:

truncate in interface Index

Specified by:

truncate in class BaseIndex

Throws:

AxionException

createTree

protected ObjectBTree createTree(java.io.File dataDirectory,
                                 java.lang.String name,
                                 int minimizationFactor,
                                 DataType dataType)
                          throws java.io.IOException,
                                 java.lang.ClassNotFoundException

Throws:

java.io.IOException

java.lang.ClassNotFoundException

getNullKey

protected java.lang.Object getNullKey()