code reorg
[csql.git] / src / relational / index / Index.cxx
blobafe1868a99a3df3b31109672aff4619c6bf184b3
1 /***************************************************************************
2 * Copyright (C) 2007 by www.databasecache.com *
3 * Contact: praba_tuty@databasecache.com *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 ***************************************************************************/
16 #include<Index.h>
17 #include<Allocator.h>
18 #include<Database.h>
19 #include<Debug.h>
21 HashIndex* Index::hIdx = NULL;
22 TreeIndex* Index::tIdx = NULL;
23 TrieIndex* Index::iIdx = NULL;
24 long Index::usageCount = 0;
26 Index* Index::getIndex(IndexType type)
28 if (type == hashIndex)
30 if (NULL == hIdx) hIdx = new HashIndex();
31 return hIdx;
32 }else if (type == treeIndex) {
33 if (NULL == tIdx) tIdx = new TreeIndex();
34 return tIdx;
35 }else if (type == trieIndex) {
36 if (NULL == iIdx) iIdx = new TrieIndex();
37 return iIdx;
39 return NULL;
41 void Index::destroy()
43 usageCount--;
44 if(!usageCount) {
45 if(!hIdx) { delete hIdx; hIdx=NULL; }
46 if(!tIdx) { delete tIdx; tIdx=NULL; }
47 if(!iIdx) { delete tIdx; iIdx=NULL; }