| 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 | * ViewResult.java |
| 29 | * --------------- |
| 30 | * Author: Volker Berlin |
| 31 | * |
| 32 | * Created on 05.06.2004 |
| 33 | */ |
| 34 | package smallsql.database; |
| 35 | |
| 36 | import java.sql.*; |
| 37 | |
| 38 | |
| 39 | /** |
| 40 | * @author Volker Berlin |
| 41 | */ |
| 42 | class ViewResult extends TableViewResult { |
| 43 | |
| 44 | final private View view; |
| 45 | final private Expressions columnExpressions; |
| 46 | final private CommandSelect commandSelect; |
| 47 | |
| 48 | |
| 49 | ViewResult(View view){ |
| 50 | this.view = view; |
| 51 | this.columnExpressions = view.commandSelect.columnExpressions; |
| 52 | this.commandSelect = view.commandSelect; |
| 53 | } |
| 54 | |
| 55 | |
| 56 | /** |
| 57 | * Constructor is used for UNION |
| 58 | * @throws Exception |
| 59 | * |
| 60 | */ |
| 61 | ViewResult(SSConnection con, CommandSelect commandSelect) throws SQLException{ |
| 62 | try{ |
| 63 | this.view = new View( con, commandSelect); |
| 64 | this.columnExpressions = commandSelect.columnExpressions; |
| 65 | this.commandSelect = commandSelect; |
| 66 | }catch(Exception e){ |
| 67 | throw Utils.createSQLException(e); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | |
| 72 | /** |
| 73 | * Is used for compile() of different Commands |
| 74 | * |
| 75 | * @param con |
| 76 | * @return true if now init; false if allready init |
| 77 | * @throws Exception |
| 78 | */ |
| 79 | boolean init( SSConnection con ) throws Exception{ |
| 80 | if(super.init(con)){ |
| 81 | commandSelect.compile(con); |
| 82 | return true; |
| 83 | } |
| 84 | return false; |
| 85 | } |
| 86 | |
| 87 | |
| 88 | |
| 89 | |
| 90 | /*===================================================================== |
| 91 | * |
| 92 | * Methods of base class TableViewResult |
| 93 | * |
| 94 | ====================================================================*/ |
| 95 | |
| 96 | TableView getTableView(){ |
| 97 | return view; |
| 98 | } |
| 99 | |
| 100 | |
| 101 | void deleteRow() throws SQLException{ |
| 102 | commandSelect.deleteRow(con); |
| 103 | } |
| 104 | |
| 105 | void updateRow(Expression[] updateValues) throws Exception{ |
| 106 | commandSelect.updateRow(con, updateValues); |
| 107 | } |
| 108 | |
| 109 | void insertRow(Expression[] updateValues) throws Exception{ |
| 110 | commandSelect.insertRow(con, updateValues); |
| 111 | } |
| 112 | |
| 113 | /*===================================================================== |
| 114 | * |
| 115 | * Methods of interface DataSource |
| 116 | * |
| 117 | ====================================================================*/ |
| 118 | boolean isNull(int colIdx) throws Exception { |
| 119 | return columnExpressions.get(colIdx).isNull(); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | boolean getBoolean(int colIdx) throws Exception { |
| 124 | return columnExpressions.get(colIdx).getBoolean(); |
| 125 | } |
| 126 | |
| 127 | |
| 128 | int getInt(int colIdx) throws Exception { |
| 129 | return columnExpressions.get(colIdx).getInt(); |
| 130 | } |
| 131 | |
| 132 | |
| 133 | long getLong(int colIdx) throws Exception { |
| 134 | return columnExpressions.get(colIdx).getLong(); |
| 135 | } |
| 136 | |
| 137 | |
| 138 | float getFloat(int colIdx) throws Exception { |
| 139 | return columnExpressions.get(colIdx).getFloat(); |
| 140 | } |
| 141 | |
| 142 | |
| 143 | double getDouble(int colIdx) throws Exception { |
| 144 | return columnExpressions.get(colIdx).getDouble(); |
| 145 | } |
| 146 | |
| 147 | |
| 148 | long getMoney(int colIdx) throws Exception { |
| 149 | return columnExpressions.get(colIdx).getMoney(); |
| 150 | } |
| 151 | |
| 152 | |
| 153 | MutableNumeric getNumeric(int colIdx) throws Exception { |
| 154 | return columnExpressions.get(colIdx).getNumeric(); |
| 155 | } |
| 156 | |
| 157 | |
| 158 | Object getObject(int colIdx) throws Exception { |
| 159 | return columnExpressions.get(colIdx).getObject(); |
| 160 | } |
| 161 | |
| 162 | |
| 163 | String getString(int colIdx) throws Exception { |
| 164 | return columnExpressions.get(colIdx).getString(); |
| 165 | } |
| 166 | |
| 167 | |
| 168 | byte[] getBytes(int colIdx) throws Exception { |
| 169 | return columnExpressions.get(colIdx).getBytes(); |
| 170 | } |
| 171 | |
| 172 | |
| 173 | int getDataType(int colIdx) { |
| 174 | return columnExpressions.get(colIdx).getDataType(); |
| 175 | } |
| 176 | |
| 177 | |
| 178 | /*===================================================== |
| 179 | * |
| 180 | * Methods of the interface RowSource |
| 181 | * |
| 182 | =====================================================*/ |
| 183 | |
| 184 | void beforeFirst() throws Exception { |
| 185 | commandSelect.beforeFirst(); |
| 186 | } |
| 187 | |
| 188 | |
| 189 | boolean isBeforeFirst() throws SQLException{ |
| 190 | return commandSelect.isBeforeFirst(); |
| 191 | } |
| 192 | |
| 193 | |
| 194 | boolean isFirst() throws SQLException{ |
| 195 | return commandSelect.isFirst(); |
| 196 | } |
| 197 | |
| 198 | |
| 199 | boolean first() throws Exception { |
| 200 | return commandSelect.first(); |
| 201 | } |
| 202 | |
| 203 | |
| 204 | boolean previous() throws Exception{ |
| 205 | return commandSelect.previous(); |
| 206 | } |
| 207 | |
| 208 | |
| 209 | boolean next() throws Exception { |
| 210 | return commandSelect.next(); |
| 211 | } |
| 212 | |
| 213 | |
| 214 | boolean last() throws Exception{ |
| 215 | return commandSelect.last(); |
| 216 | } |
| 217 | |
| 218 | |
| 219 | boolean isLast() throws Exception{ |
| 220 | return commandSelect.isLast(); |
| 221 | } |
| 222 | |
| 223 | |
| 224 | boolean isAfterLast() throws Exception{ |
| 225 | return commandSelect.isAfterLast(); |
| 226 | } |
| 227 | |
| 228 | |
| 229 | void afterLast() throws Exception{ |
| 230 | commandSelect.afterLast(); |
| 231 | } |
| 232 | |
| 233 | |
| 234 | boolean absolute(int row) throws Exception{ |
| 235 | return commandSelect.absolute(row); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | boolean relative(int rows) throws Exception{ |
| 240 | return commandSelect.relative(rows); |
| 241 | } |
| 242 | |
| 243 | |
| 244 | int getRow() throws Exception{ |
| 245 | return commandSelect.getRow(); |
| 246 | } |
| 247 | |
| 248 | |
| 249 | long getRowPosition() { |
| 250 | return commandSelect.join.getRowPosition(); |
| 251 | } |
| 252 | |
| 253 | |
| 254 | void setRowPosition(long rowPosition) throws Exception { |
| 255 | commandSelect.join.setRowPosition(rowPosition); |
| 256 | } |
| 257 | |
| 258 | |
| 259 | final boolean rowInserted(){ |
| 260 | return commandSelect.join.rowInserted(); |
| 261 | } |
| 262 | |
| 263 | |
| 264 | final boolean rowDeleted(){ |
| 265 | return commandSelect.join.rowDeleted(); |
| 266 | } |
| 267 | |
| 268 | |
| 269 | void nullRow() { |
| 270 | commandSelect.join.nullRow(); |
| 271 | |
| 272 | } |
| 273 | |
| 274 | |
| 275 | void noRow() { |
| 276 | commandSelect.join.noRow(); |
| 277 | } |
| 278 | |
| 279 | |
| 280 | final void execute() throws Exception{ |
| 281 | commandSelect.join.execute(); |
| 282 | } |
| 283 | } |