DataHandler


1   /*
2    * Copyright 2004-2006 H2 Group. Licensed under the H2 License, Version 1.0 (http://h2database.com/html/license.html).
3    * Initial Developer: H2 Group
4    */
5   package org.h2.store;
6   
7   import java.sql.SQLException  ;
8   
9   import org.h2.value.Value;
10  
11  public interface DataHandler {
12      boolean getTextStorage();
13      String   getDatabasePath();
14      FileStore openFile(String   name, boolean mustExist) throws SQLException  ;
15      int getChecksum(byte[] data, int start, int end);
16      void checkPowerOff() throws SQLException  ;
17      void checkWritingAllowed() throws SQLException  ;
18      void freeUpDiskSpace() throws SQLException  ;
19      void handleInvalidChecksum() throws SQLException  ;
20      int compareTypeSave(Value a, Value b) throws SQLException  ;
21      int getMaxLengthInplaceLob();
22      
23      String   getLobCompressionAlgorithm(int type);
24      
25      // only tempoarily, until LOB_FILES_IN_DIRECTORIES is enabled
26      int allocateObjectId(boolean needFresh, boolean dataFile);
27      String   createTempFile() throws SQLException  ;
28  
29  }
30

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