org.helidb.backend.index.bplus
Class BPlusTreeIndexBackendFactory<K,V,H extends Comparable<H>,P>

java.lang.Object
  org.helidb.backend.index.bplus.BPlusTreeIndexBackendFactory<K,V,H,P>

Type Parameters:

K - The type of keys in the database.

V - The type of values in the database.

H - The type of the key hashes.

P - The type of positions in the indexed backend.

All Implemented Interfaces:

DatabaseBackendFactory<K,V,P>

public class BPlusTreeIndexBackendFactory<K,V,H extends Comparable<H>,P>
extends Object
implements DatabaseBackendFactory<K,V,P>

This is a DatabaseBackendFactory for building BPlusTreeIndexBackend objects.

Since:

1.0

Author:

Karl Gustafsson

See Also:

BPlusTreeIndexBackend

In_jar:

helidb-bplus_index_backend

Constructor Summary

BPlusTreeIndexBackendFactory(DatabaseBackendFactory<K,V,P> proxied, NodeRepositoryBuilder<H> nrb, Hasher<K,H> keyHasher, LogAdapterHolder lah)
Constructor.

Method Summary

DatabaseBackend<K,V,P>

create(DatabaseFiles f, boolean readOnly) Create a new backend for the supplied file.

Methods inherited from class java.lang.Object

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

Constructor Detail

BPlusTreeIndexBackendFactory

public BPlusTreeIndexBackendFactory(DatabaseBackendFactory<K,V,P> proxied,
                                    NodeRepositoryBuilder<H> nrb,
                                    Hasher<K,H> keyHasher,
                                    LogAdapterHolder lah)

Constructor.

Parameters:

proxied - A factory for building proxied DatabaseBackend objects.

nrb - A builder for building NodeRepository objects for the B+ Tree index. See BPlusTreeIndexBackendFileBackedNodeRepositoryBuilder.

keyHasher - Hasher for the keys.

lah - A log adapter holder.

Method Detail

create

public DatabaseBackend<K,V,P> create(DatabaseFiles f,
                                     boolean readOnly)

Description copied from interface: DatabaseBackendFactory

Create a new backend for the supplied file.

Specified by:

create in interface DatabaseBackendFactory<K,V,P>

Parameters:

f - The file(s) containing the database data. The implementation of this method should be able to assume a specific DatabaseFiles implementation. Which depends on the implementation of the database backend to create.

readOnly - Should the backend object be created read only?

Returns:

A new database backend object.