/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hp.hpl.jena.tdb.index.factories;
import org.slf4j.Logger ;
import org.slf4j.LoggerFactory ;
import com.hp.hpl.jena.tdb.TDBException ;
import com.hp.hpl.jena.tdb.base.block.BlockMgr ;
import com.hp.hpl.jena.tdb.base.block.BlockMgrFactory ;
import com.hp.hpl.jena.tdb.base.file.FileSet ;
import com.hp.hpl.jena.tdb.base.record.RecordFactory ;
import com.hp.hpl.jena.tdb.index.Index ;
import com.hp.hpl.jena.tdb.index.IndexFactory ;
import com.hp.hpl.jena.tdb.index.IndexRangeFactory ;
import com.hp.hpl.jena.tdb.index.RangeIndex ;
import com.hp.hpl.jena.tdb.index.bplustree.BPlusTree ;
import com.hp.hpl.jena.tdb.index.bplustree.BPlusTreeParams ;
import com.hp.hpl.jena.tdb.sys.Names ;
import com.hp.hpl.jena.tdb.sys.SystemTDB ;
public class IndexFactoryBPlusTree implements IndexFactory, IndexRangeFactory
{
private static Logger log = LoggerFactory.getLogger(IndexFactoryBPlusTree.class) ;
private final int blockSize ;
public IndexFactoryBPlusTree()
{ this(SystemTDB.BlockSize) ; }
public IndexFactoryBPlusTree(int blockSize)
{
this.blockSize = blockSize ;
}
@Override
public Index createIndex(FileSet fileset, RecordFactory factory)
{
return createRangeIndex(fileset, factory) ;
}
@Override
public RangeIndex createRangeIndex(FileSet fileset, RecordFactory factory)
{
int order = BPlusTreeParams.calcOrder(blockSize, factory) ;
BPlusTreeParams params = new BPlusTreeParams(order, factory) ;
if ( params.getCalcBlockSize() > blockSize )
throw new TDBException("Calculated block size is greater than required size") ;
BlockMgr blkMgrNodes = createBlockMgr(fileset, Names.bptExtTree, blockSize) ;
BlockMgr blkMgrRecords = createBlockMgr(fileset, Names.bptExtRecords, blockSize) ;
return BPlusTree.create(params, blkMgrNodes, blkMgrRecords) ;
}
static BlockMgr createBlockMgr(FileSet fileset, String filename, int blockSize)
{
if ( fileset.isMem() )
return BlockMgrFactory.createMem(filename, blockSize) ;
String fnNodes = fileset.filename(filename) ;
return BlockMgrFactory.createFile(fnNodes, blockSize,
SystemTDB.BlockReadCacheSize,
SystemTDB.BlockWriteCacheSize) ;
}
}