| 1 | /* ============================================================= |
| 2 | * SmallSQL : a free Java DBMS library for the Java(tm) platform |
| 3 | * ============================================================= |
| 4 | * |
| 5 | * (C) Copyright 2004-2006, by Volker Berlin. |
| 6 | * |
| 7 | * Project Info: http://www.smallsql.de/ |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU Lesser General Public License as published by |
| 11 | * the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 17 | * License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| 22 | * USA. |
| 23 | * |
| 24 | * [Java is a trademark or registered trademark of Sun Microsystems, Inc. |
| 25 | * in the United States and other countries.] |
| 26 | * |
| 27 | * --------------- |
| 28 | * Store.java |
| 29 | * --------------- |
| 30 | * Author: Volker Berlin |
| 31 | * |
| 32 | */ |
| 33 | package smallsql.database; |
| 34 | |
| 35 | import java.sql.*; |
| 36 | /** |
| 37 | * @author Volker Berlin |
| 38 | * |
| 39 | */ |
| 40 | abstract class Store { |
| 41 | |
| 42 | static final Store NULL = new StoreNull(); |
| 43 | static final Store NOROW= new StoreNoCurrentRow(); |
| 44 | |
| 45 | abstract boolean isNull(int offset) throws Exception; |
| 46 | |
| 47 | abstract boolean getBoolean( int offset, int dataType) throws Exception; |
| 48 | |
| 49 | abstract byte[] getBytes( int offset, int dataType) throws Exception; |
| 50 | |
| 51 | abstract double getDouble( int offset, int dataType) throws Exception; |
| 52 | |
| 53 | abstract float getFloat( int offset, int dataType) throws Exception; |
| 54 | |
| 55 | abstract int getInt( int offset, int dataType) throws Exception; |
| 56 | |
| 57 | abstract long getLong( int offset, int dataType) throws Exception; |
| 58 | |
| 59 | abstract long getMoney( int offset, int dataType) throws Exception; |
| 60 | |
| 61 | abstract MutableNumeric getNumeric( int offset, int dataType) throws Exception; |
| 62 | |
| 63 | abstract Object getObject( int offset, int dataType) throws Exception; |
| 64 | |
| 65 | abstract String getString( int offset, int dataType) throws Exception; |
| 66 | |
| 67 | |
| 68 | |
| 69 | /** |
| 70 | * Get the status of the current page. |
| 71 | * @return true if the current row valid. false if deleted or updated data. |
| 72 | */ |
| 73 | boolean isValidPage(){ |
| 74 | return false; |
| 75 | } |
| 76 | |
| 77 | abstract void scanObjectOffsets( int[] offsets, int dataTypes[] ); |
| 78 | |
| 79 | abstract int getUsedSize(); |
| 80 | |
| 81 | abstract long getNextPagePos(); |
| 82 | |
| 83 | abstract void deleteRow(SSConnection con) throws SQLException; |
| 84 | } |