gitorious.org Git - online-glom:gwt-glom.git/blob - src/main/java/org/glom/web/server/OnlineGlomServiceImpl.java

1 /*

3 *

4 * This file is part of GWT-Glom.

5 *

6 * GWT-Glom is free software: you can redistribute it and/or modify it

7 * under the terms of the GNU Lesser General Public License as published by the

8 * Free Software Foundation, either version 3 of the License, or (at your

9 * option) any later version.

10 *

11 * GWT-Glom is distributed in the hope that it will be useful, but WITHOUT

12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License

14 * for more details.

15 *

16 * You should have received a copy of the GNU Lesser General Public License

17 * along with GWT-Glom. If not, see <http://www.gnu.org/licenses/>.

18 */

19

20 package org.glom.web.server;

21

22 import java.beans.PropertyVetoException;

23 import java.io.File;

24 import java.io.FileInputStream;

25 import java.io.FilenameFilter;

26 import java.io.IOException;

27 import java.sql.Connection;

28 import java.sql.Date;

29 import java.sql.ResultSet;

30 import java.sql.SQLException;

31 import java.sql.Statement;

32 import java.sql.Time;

33 import java.text.DateFormat;

34 import java.text.NumberFormat;

35 import java.util.ArrayList;

36 import java.util.Currency;

37 import java.util.Hashtable;

38 import java.util.Locale;

39 import java.util.Properties;

40

41 import org.glom.libglom.BakeryDocument.LoadFailureCodes;

42 import org.glom.libglom.Document;

43 import org.glom.libglom.Field;

44 import org.glom.libglom.FieldFormatting;

45 import org.glom.libglom.FieldVector;

46 import org.glom.libglom.Glom;

47 import org.glom.libglom.LayoutFieldVector;

48 import org.glom.libglom.LayoutGroupVector;

49 import org.glom.libglom.LayoutItem;

50 import org.glom.libglom.LayoutItemVector;

51 import org.glom.libglom.LayoutItem_Field;

52 import org.glom.libglom.NumericFormat;

53 import org.glom.libglom.SortClause;

54 import org.glom.libglom.SortFieldPair;

55 import org.glom.libglom.StringVector;

56 import org.glom.web.client.OnlineGlomService;

57 import org.glom.web.shared.ColumnInfo;

58 import org.glom.web.shared.GlomDocument;

59 import org.glom.web.shared.GlomField;

60 import org.glom.web.shared.LayoutListTable;

61

62 import com.allen_sauer.gwt.log.client.Log;

63 import com.google.gwt.user.server.rpc.RemoteServiceServlet;

64 import com.mchange.v2.c3p0.ComboPooledDataSource;

65 import com.mchange.v2.c3p0.DataSources;

66

67 @SuppressWarnings("serial")

68 public class OnlineGlomServiceImpl extends RemoteServiceServlet implements OnlineGlomService {

69

70 // class to hold configuration information for related to the glom document and db access

71 private class ConfiguredDocument {

72 private Document document;

73 private ComboPooledDataSource cpds;

74 private boolean authenticated = false;

75

76 // @formatter:off

77 public Document getDocument() { return document; }

78 public void setDocument(Document document) { this.document = document; }

79 public ComboPooledDataSource getCpds() { return cpds; }

80 public void setCpds(ComboPooledDataSource cpds) { this.cpds = cpds; }

81 public boolean isAuthenticated() { return authenticated; }

82 public void setAuthenticated(boolean authenticated) { this.authenticated = authenticated; }

83 // @formatter:on

84 }

85

86 // convenience class to for dealing with the Online Glom configuration file

87 private class OnlineGlomProperties extends Properties {

88 public String getKey(String value) {

89 for (String key : stringPropertyNames()) {

90 if (getProperty(key).trim().equals(value))

91 return key;

92 }

93 return null;

94 }

95 }

96

97 private final Hashtable<String, ConfiguredDocument> documents = new Hashtable<String, ConfiguredDocument>();

98 // TODO implement locale

99 private final Locale locale = Locale.ROOT;

100

101 /*

102 * This is called when the servlet is started or restarted.

103 */

104 public OnlineGlomServiceImpl() throws Exception {

105

106 // This retrieves configuration values from the onlineglom properties file located on the classpath for this

107 // servlet.

108 String classpath = System.getProperty("java.class.path");

109 String[] paths = classpath.split(File.pathSeparator);

110 File propFile = null;

111 boolean configFound = false;

112 for (String path : paths) {

113 propFile = new File(path, "onlineglom.properties");

114 if (propFile.exists() && !propFile.isDirectory()) {

115 configFound = true;

116 Log.info("Using configuration file: " + propFile.getAbsolutePath());

117 break;

118 }

119 }

120 if (!configFound) {

121 Log.fatal("onlineglom.properties not found on the classpath.");

122 throw new IOException();

123 }

124 OnlineGlomProperties config = new OnlineGlomProperties();

125 config.load(new FileInputStream(propFile));

126

127 // check the configured glom file directory

128 String documentDirName = config.getProperty("glom.document.directory");

129 File documentDir = new File(documentDirName);

130 if (!documentDir.isDirectory()) {

131 Log.fatal(documentDirName + " is not a directory.");

132 throw new IOException();

133 }

134 if (!documentDir.canRead()) {

135 Log.fatal("Can't read the files in : " + documentDirName);

136 throw new IOException();

137 }

138

139 // get and check the glom files in the specified directory

140 File[] glomFiles = documentDir.listFiles(new FilenameFilter() {

141 @Override

142 public boolean accept(File dir, String name) {

143 return name.endsWith(".glom") ? true : false;

144 }

145 });

146 Glom.libglom_init();

147 for (File glomFile : glomFiles) {

148 Document document = new Document();

149 document.set_file_uri("file://" + glomFile.getAbsolutePath());

150 int error = 0;

151 boolean retval = document.load(error);

152 if (retval == false) {

153 String message;

154 if (LoadFailureCodes.LOAD_FAILURE_CODE_NOT_FOUND == LoadFailureCodes.swigToEnum(error)) {

155 message = "Could not find " + documentDir.getAbsolutePath();

156 } else {

157 message = "An unknown error occurred when trying to load " + documentDir.getAbsolutePath();

158 }

159 Log.error(message);

160 // continue with for loop because there may be other documents in the directory

161 continue;

162 }

163

164 // load the jdbc driver for the current glom document

165 ComboPooledDataSource cpds = new ComboPooledDataSource();

166

167 try {

168 cpds.setDriverClass("org.postgresql.Driver");

169 } catch (PropertyVetoException e) {

170 Log.fatal("Error loading the PostgreSQL JDBC driver. Is the PostgreSQL JDBC jar available to the servlet?");

171 throw e;

172 }

173

174 // setup the JDBC driver for the current glom document

175 cpds.setJdbcUrl("jdbc:postgresql://" + document.get_connection_server() + "/"

176 + document.get_connection_database());

177

178 // check if a username and password have been set and work for the current document

179 String documentTitle = document.get_database_title().trim();

180 ConfiguredDocument configuredDocument = new ConfiguredDocument();

181 String key = config.getKey(documentTitle);

182 if (key != null) {

183 String[] keyArray = key.split("\\.");

184 if (keyArray.length == 3 && "title".equals(keyArray[2])) {

185 // username/password could be set, let's check to see if it works

186 String usernameKey = key.replaceAll(keyArray[2], "username");

187 String passwordKey = key.replaceAll(keyArray[2], "password");

188 configuredDocument.setAuthenticated(checkAuthentication(documentTitle, cpds,

189 config.getProperty(usernameKey), config.getProperty(passwordKey)));

190 }

191 }

192

193 // check the if the global username and password have been set and work with this document

194 if (!configuredDocument.isAuthenticated()) {

195 configuredDocument.setAuthenticated(checkAuthentication(documentTitle, cpds,

196 config.getProperty("glom.document.username"), config.getProperty("glom.document.password")));

197 }

198

199 // add information to the hash table

200 configuredDocument.setDocument(document);

201 configuredDocument.setCpds(cpds);

202 documents.put(documentTitle, configuredDocument);

203 }

204 }

205

206 /*

207 * Checks if the username and password works with the database configured with the specified ComboPooledDataSource.

208 *

209 * @return true if authentication works, false otherwise

210 */

211 private boolean checkAuthentication(String documentTitle, ComboPooledDataSource cpds, String username,

212 String password) throws SQLException {

213 cpds.setUser(username);

214 cpds.setPassword(password);

215

216 int acquireRetryAttempts = cpds.getAcquireRetryAttempts();

217 cpds.setAcquireRetryAttempts(1);

218 Connection conn = null;

219 try {

220 // FIXME find a better way to check authentication

221 // it's possible that the connection could be failing for another reason

222 conn = cpds.getConnection();

223 return true;

224 } catch (SQLException e) {

225 Log.info("Username and password not correct for document: " + documentTitle);

226 } finally {

227 if (conn != null)

228 conn.close();

229 cpds.setAcquireRetryAttempts(acquireRetryAttempts);

230 }

231 return false;

232 }

233

234 /*

235 * This is called when the servlet is stopped or restarted.

236 *

237 * @see javax.servlet.GenericServlet#destroy()

238 */

239 @Override

240 public void destroy() {

241 Glom.libglom_deinit();

242

243 for (String documenTitle : documents.keySet()) {

244 ConfiguredDocument configuredDoc = documents.get(documenTitle);

245 try {

246 DataSources.destroy(configuredDoc.getCpds());

247 } catch (SQLException e) {

248 Log.error("Error cleaning up the ComboPooledDataSource for " + documenTitle, e);

249 }

250 }

251

252 }

253

254 public GlomDocument getGlomDocument(String documentTitle) {

255

256 Document document = documents.get(documentTitle).getDocument();

257 GlomDocument glomDocument = new GlomDocument();

258

259 // get arrays of table names and titles, and find the default table index

260 StringVector tablesVec = document.get_table_names();

261

262 int numTables = safeLongToInt(tablesVec.size());

263 // we don't know how many tables will be hidden so we'll use half of the number of tables for the default size

264 // of the ArrayList

265 ArrayList<String> tableNames = new ArrayList<String>(numTables / 2);

266 ArrayList<String> tableTitles = new ArrayList<String>(numTables / 2);

267 boolean foundDefaultTable = false;

268 int visibleIndex = 0;

269 for (int i = 0; i < numTables; i++) {

270 String tableName = tablesVec.get(i);

271 if (!document.get_table_is_hidden(tableName)) {

272 tableNames.add(tableName);

273 // JNI is "expensive", the comparison will only be called if we haven't already found the default table

274 if (!foundDefaultTable && tableName.equals(document.get_default_table())) {

275 glomDocument.setDefaultTableIndex(visibleIndex);

276 foundDefaultTable = true;

277 }

278 tableTitles.add(document.get_table_title(tableName));

279 visibleIndex++;

280 }

281 }

282

283 // set everything we need

284 glomDocument.setTableNames(tableNames);

285 glomDocument.setTableTitles(tableTitles);

286

287 return glomDocument;

288 }

289

290 /*

291 * (non-Javadoc)

292 *

293 * @see org.glom.web.client.OnlineGlomService#getDefaultLayoutListTable(java.lang.String)

294 */

295 @Override

296 public LayoutListTable getDefaultLayoutListTable(String documentTitle) {

297 GlomDocument glomDocument = getGlomDocument(documentTitle);

298 String tableName = glomDocument.getTableNames().get(glomDocument.getDefaultTableIndex());

299 LayoutListTable layoutListTable = getLayoutListTable(documentTitle, tableName);

300 layoutListTable.setTableName(tableName);

301 return layoutListTable;

302 }

303

304 public LayoutListTable getLayoutListTable(String documentTitle, String table) {

305 ConfiguredDocument configuredDoc = documents.get(documentTitle);

306 Document document = configuredDoc.getDocument();

307 LayoutListTable tableInfo = new LayoutListTable();

308

309 // access the layout list

310 LayoutGroupVector layoutListVec = document.get_data_layout_groups("list", table);

311 ColumnInfo[] columns = null;

312 LayoutFieldVector layoutFields = new LayoutFieldVector();

313 int listViewLayoutGroupSize = safeLongToInt(layoutListVec.size());

314 if (listViewLayoutGroupSize > 0) {

315 // a layout list is defined, we can use it to for the LayoutListTable

316 if (listViewLayoutGroupSize > 1)

317 Log.warn(documentTitle + " - " + table + ": The size of the list view layout group for table " + table

318 + " is greater than 1. Attempting to use the first item for the layout list view.");

319 LayoutItemVector layoutItemsVec = layoutListVec.get(0).get_items();

320

321 // find the defined layout list fields

322 int numItems = safeLongToInt(layoutItemsVec.size());

323 columns = new ColumnInfo[numItems];

324 for (int i = 0; i < numItems; i++) {

325 // TODO add support for other LayoutItems (Text, Image, Button)

326 LayoutItem item = layoutItemsVec.get(i);

327 LayoutItem_Field layoutItemField = LayoutItem_Field.cast_dynamic(item);

328 if (layoutItemField != null) {

329 layoutFields.add(layoutItemField);

330 columns[i] = new ColumnInfo(

331 layoutItemField.get_title_or_name(),

332 getColumnInfoHorizontalAlignment(layoutItemField.get_formatting_used_horizontal_alignment()),

333 getColumnInfoGlomFieldType(layoutItemField.get_glom_type()));

334 }

335 }

336 } else {

337 // no layout list is defined, use the table fields as the layout list

338 FieldVector fieldsVec = document.get_table_fields(table);

339

340 // find the fields to display in the layout list

341 int numItems = safeLongToInt(fieldsVec.size());

342 columns = new ColumnInfo[numItems];

343 for (int i = 0; i < numItems; i++) {

344 Field field = fieldsVec.get(i);

345 LayoutItem_Field layoutItemField = new LayoutItem_Field();

346 layoutItemField.set_full_field_details(field);

347 layoutFields.add(layoutItemField);

348 columns[i] = new ColumnInfo(layoutItemField.get_title_or_name(),

349 getColumnInfoHorizontalAlignment(layoutItemField.get_formatting_used_horizontal_alignment()),

350 getColumnInfoGlomFieldType(layoutItemField.get_glom_type()));

351 }

352 }

353

354 tableInfo.setColumns(columns);

355

356 // Get the number of rows a query with the table name and layout fields would return. This is needed for the

357 // list view pager.

358 if (!configuredDoc.isAuthenticated())

359 return tableInfo;

360 Connection conn = null;

361 Statement st = null;

362 ResultSet rs = null;

363 try {

364 // Setup and execute the count query. Special care needs to be take to ensure that the results will be based

365 // on a cursor so that large amounts of memory are not consumed when the query retrieve a large amount of

366 // data. Here's the relevant PostgreSQL documentation:

367 // http://jdbc.postgresql.org/documentation/83/query.html#query-with-cursor

368 ComboPooledDataSource cpds = configuredDoc.getCpds();

369 conn = cpds.getConnection();

370 conn.setAutoCommit(false);

371 st = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);

372 String query = Glom.build_sql_select_count_simple(table, layoutFields);

373 // TODO Test execution time of this query with when the number of rows in the table is large (say >

374 // 1,000,000). Test memory usage at the same time (see the todo item in getTableData()).

375 rs = st.executeQuery(query);

376

377 // get the number of rows in the query

378 rs.next();

379 tableInfo.setNumRows(rs.getInt(1));

380

381 } catch (SQLException e) {

382 Log.error(documentTitle + " - " + table

383 + ": Error calculating number of rows in the query. Setting number of rows to 0.", e);

384 tableInfo.setNumRows(0);

385 } finally {

386 // cleanup everything that has been used

387 try {

388 if (rs != null)

389 rs.close();

390 if (st != null)

391 st.close();

392 if (conn != null)

393 conn.close();

394 } catch (Exception e) {

395 Log.error(documentTitle + " - " + table

396 + ": Error closing database resources. Subsequent database queries may not work.", e);

397 }

398 }

399

400 return tableInfo;

401 }

402

403 public ArrayList<GlomField[]> getTableData(String documentTitle, String tableName, int start, int length) {

404 return getTableData(documentTitle, tableName, start, length, false, 0, false);

405 }

406

407 public ArrayList<GlomField[]> getSortedTableData(String documentTitle, String tableName, int start, int length,

408 int sortColumnIndex, boolean isAscending) {

409 return getTableData(documentTitle, tableName, start, length, true, sortColumnIndex, isAscending);

410 }

411

412 private ArrayList<GlomField[]> getTableData(String documentTitle, String tableName, int start, int length,

413 boolean useSortClause, int sortColumnIndex, boolean isAscending) {

414

415 ConfiguredDocument configuredDoc = documents.get(documentTitle);

416 Document document = configuredDoc.getDocument();

417

418 // access the layout list using the defined layout list or the table fields if there's no layout list

419 LayoutGroupVector layoutListVec = document.get_data_layout_groups("list", tableName);

420 LayoutFieldVector layoutFields = new LayoutFieldVector();

421 SortClause sortClause = new SortClause();

422 int listViewLayoutGroupSize = safeLongToInt(layoutListVec.size());

423 if (layoutListVec.size() > 0) {

424 // a layout list is defined, we can use it to for the LayoutListTable

425 if (listViewLayoutGroupSize > 1)

426 Log.warn(documentTitle + ": The size of the list view layout group for table " + tableName

427 + " is greater than 1. Attempting to use the first item for the layout list view.");

428 LayoutItemVector layoutItemsVec = layoutListVec.get(0).get_items();

429

430 // find the defined layout list fields

431 int numItems = safeLongToInt(layoutItemsVec.size());

432 for (int i = 0; i < numItems; i++) {

433 // TODO add support for other LayoutItems (Text, Image, Button)

434 LayoutItem item = layoutItemsVec.get(i);

435 LayoutItem_Field layoutItemfield = LayoutItem_Field.cast_dynamic(item);

436 if (layoutItemfield != null) {

437 // use this field in the layout

438 layoutFields.add(layoutItemfield);

439

440 // create a sort clause if it's a primary key and we're not asked to sort a specific column

441 if (!useSortClause) {

442 Field details = layoutItemfield.get_full_field_details();

443 if (details != null && details.get_primary_key()) {

444 sortClause.addLast(new SortFieldPair(layoutItemfield, true)); // ascending

445 }

446 }

447 }

448 }

449 } else {

450 // no layout list is defined, use the table fields as the layout list

451 FieldVector fieldsVec = document.get_table_fields(tableName);

452

453 // find the fields to display in the layout list

454 int numItems = safeLongToInt(fieldsVec.size());

455 for (int i = 0; i < numItems; i++) {

456 Field field = fieldsVec.get(i);

457 LayoutItem_Field layoutItemField = new LayoutItem_Field();

458 layoutItemField.set_full_field_details(field);

459 layoutFields.add(layoutItemField);

460

461 // create a sort clause if it's a primary key and we're not asked to sort a specific column

462 if (!useSortClause) {

463 if (field.get_primary_key()) {

464 sortClause.addLast(new SortFieldPair(layoutItemField, true)); // ascending

465 }

466 }

467 }

468 }

469

470 // create a sort clause for the column we've been asked to sort

471 if (useSortClause) {

472 LayoutItem item = layoutFields.get(sortColumnIndex);

473 LayoutItem_Field field = LayoutItem_Field.cast_dynamic(item);

474 if (field != null)

475 sortClause.addLast(new SortFieldPair(field, isAscending));

476 else {

477 Log.error(documentTitle + " - " + tableName + ": Error getting LayoutItem_Field for column index "

478 + sortColumnIndex + ". Cannot create a sort clause for this column.");

479 }

480

481 }

482

483 ArrayList<GlomField[]> rowsList = new ArrayList<GlomField[]>();

484 if (!configuredDoc.isAuthenticated())

485 return rowsList;

486 Connection conn = null;

487 Statement st = null;

488 ResultSet rs = null;

489 try {

490 // Setup and execute the query. Special care needs to be take to ensure that the results will be based on a

491 // cursor so that large amounts of memory are not consumed when the query retrieve a large amount of data.

492 // Here's the relevant PostgreSQL documentation:

493 // http://jdbc.postgresql.org/documentation/83/query.html#query-with-cursor

494 ComboPooledDataSource cpds = configuredDoc.getCpds();

495 conn = cpds.getConnection();

496 conn.setAutoCommit(false);

497 st = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);

498 st.setFetchSize(length);

499 String query = Glom.build_sql_select_simple(tableName, layoutFields, sortClause) + " OFFSET " + start;

500 // TODO Test memory usage before and after we execute the query that would result in a large ResultSet.

501 // We need to ensure that the JDBC driver is in fact returning a cursor based result set that has a low

502 // memory footprint. Check the difference between this value before and after the query:

503 // Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()

504 // Test the execution time at the same time (see the todo item in getLayoutListTable()).

505 rs = st.executeQuery(query);

506

507 // get the data we've been asked for

508 int rowCount = 0;

509 while (rs.next() && rowCount <= length) {

510 int layoutFieldsSize = safeLongToInt(layoutFields.size());

511 GlomField[] rowArray = new GlomField[layoutFieldsSize];

512 for (int i = 0; i < layoutFieldsSize; i++) {

513 // make a new GlomField to set the text and colours

514 rowArray[i] = new GlomField();

515

516 // get foreground and background colours

517 LayoutItem_Field field = layoutFields.get(i);

518 FieldFormatting formatting = field.get_formatting_used();

519 String fgcolour = formatting.get_text_format_color_foreground();

520 if (!fgcolour.isEmpty())

521 rowArray[i].setFGColour(convertGdkColorToHtmlColour(fgcolour));

522 String bgcolour = formatting.get_text_format_color_background();

523 if (!bgcolour.isEmpty())

524 rowArray[i].setBGColour(convertGdkColorToHtmlColour(bgcolour));

525

526 // Convert the field value to a string based on the glom type. We're doing the formatting on the

527 // server side for now but it might be useful to move this to the client side.

528 switch (field.get_glom_type()) {

529 case TYPE_TEXT:

530 String text = rs.getString(i + 1);

531 rowArray[i].setText(text != null ? text : "");

532 break;

533 case TYPE_BOOLEAN:

534 rowArray[i].setBoolean(rs.getBoolean(i + 1));

535 break;

536 case TYPE_NUMERIC:

537 // Take care of the numeric formatting before converting the number to a string.

538 NumericFormat numFormatGlom = formatting.getM_numeric_format();

539 // There's no isCurrency() method in the glom NumericFormat class so we're assuming that the

540 // number should be formatted as a currency if the currency code string is not empty.

541 String currencyCode = numFormatGlom.getM_currency_symbol();

542 NumberFormat numFormatJava = null;

543 boolean useGlomCurrencyCode = false;

544 if (currencyCode.length() == 3) {

545 // Try to format the currency using the Java Locales system.

546 try {

547 Currency currency = Currency.getInstance(currencyCode);

548 Log.info(documentTitle

549 + " "

550 + tableName

551 + ": A valid ISO 4217 currency code is being used. Overriding the numeric formatting with information from the locale.");

552 int digits = currency.getDefaultFractionDigits();

553 numFormatJava = NumberFormat.getCurrencyInstance(locale);

554 numFormatJava.setCurrency(currency);

555 numFormatJava.setMinimumFractionDigits(digits);

556 numFormatJava.setMaximumFractionDigits(digits);

557 } catch (IllegalArgumentException e) {

558 Log.warn(documentTitle

559 + " "

560 + tableName

561 + ": "

562 + currencyCode

563 + " is not a valid ISO 4217 code. Manually setting currency code with this value.");

564 // The currency code is not this is not an ISO 4217 currency code.

565 // We're going to manually set the currency code and use the glom numeric formatting.

566 useGlomCurrencyCode = true;

567 numFormatJava = getJavaNumberFormat(numFormatGlom);

568 }

569 } else if (currencyCode.length() > 0) {

570 Log.warn(documentTitle + " - " + tableName + ": " + currencyCode

571 + " is not a valid ISO 4217 code. Manually setting currency code with this value.");

572 // The length of the currency code is > 0 and != 3; this is not an ISO 4217 currency code.

573 // We're going to manually set the currency code and use the glom numeric formatting.

574 useGlomCurrencyCode = true;

575 numFormatJava = getJavaNumberFormat(numFormatGlom);

576 } else {

577 // The length of the currency code is 0; the number is not a currency.

578 numFormatJava = getJavaNumberFormat(numFormatGlom);

579 }

580

581 // TODO: Do I need to do something with NumericFormat.get_default_precision() from libglom?

582

583 double number = rs.getDouble(i + 1);

584 if (number < 0) {

585 if (formatting.getM_numeric_format().getM_alt_foreground_color_for_negatives())

586 // overrides the set foreground colour

587 rowArray[i].setFGColour(convertGdkColorToHtmlColour(NumericFormat

588 .get_alternative_color_for_negatives()));

589 }

590

591 // Finally convert the number to text using the glom currency string if required.

592 if (useGlomCurrencyCode) {

593 rowArray[i].setText(currencyCode + " " + numFormatJava.format(number));

594 } else {

595 rowArray[i].setText(numFormatJava.format(number));

596 }

597 break;

598 case TYPE_DATE:

599 Date date = rs.getDate(i + 1);

600 if (date != null) {

601 DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.MEDIUM, locale);

602 rowArray[i].setText(dateFormat.format(date));

603 } else {

604 rowArray[i].setText("");

605 }

606 break;

607 case TYPE_TIME:

608 Time time = rs.getTime(i + 1);

609 if (time != null) {

610 DateFormat timeFormat = DateFormat.getTimeInstance(DateFormat.MEDIUM, locale);

611 rowArray[i].setText(timeFormat.format(time));

612 } else {

613 rowArray[i].setText("");

614 }

615 break;

616 case TYPE_IMAGE:

617 byte[] image = rs.getBytes(i + 1);

618 if (image != null) {

619 // TODO implement field TYPE_IMAGE

620 rowArray[i].setText("Image (FIXME)");

621 } else {

622 rowArray[i].setText("");

623 }

624 break;

625 case TYPE_INVALID:

626 default:

627 Log.warn(documentTitle + " - " + tableName

628 + ": Invalid LayoutItem Field type. Using empty string for value.");

629 rowArray[i].setText("");

630 break;

631 }

632 }

633

634 // add the row of GlomFields to the ArrayList we're going to return and update the row count

635 rowsList.add(rowArray);

636 rowCount++;

637 }

638 } catch (SQLException e) {

639 Log.error(documentTitle + " - " + tableName + ": Error executing database query.", e);

640 // TODO: somehow notify user of problem

641 } finally {

642 // cleanup everything that has been used

643 try {

644 if (rs != null)

645 rs.close();

646 if (st != null)

647 st.close();

648 if (conn != null)

649 conn.close();

650 } catch (Exception e) {

651 Log.error(documentTitle + " - " + tableName

652 + ": Error closing database resources. Subsequent database queries may not work.", e);

653 }

654 }

655 return rowsList;

656 }

657

658 public ArrayList<String> getDocumentTitles() {

659 ArrayList<String> documentTitles = new ArrayList<String>();

660 for (String title : documents.keySet()) {

661 documentTitles.add(title);

662 }

663 return documentTitles;

664 }

665

666 /*

667 * This method safely converts longs from libglom into ints. This method was taken from stackoverflow:

668 *

669 * http://stackoverflow.com/questions/1590831/safely-casting-long-to-int-in-java

670 */

671 private int safeLongToInt(long value) {

672 if (value < Integer.MIN_VALUE || value > Integer.MAX_VALUE) {

673 throw new IllegalArgumentException(value + " cannot be cast to int without changing its value.");

674 }

675 return (int) value;

676 }

677

678 private NumberFormat getJavaNumberFormat(NumericFormat numFormatGlom) {

679 NumberFormat numFormatJava = NumberFormat.getInstance(locale);

680 if (numFormatGlom.getM_decimal_places_restricted()) {

681 int digits = safeLongToInt(numFormatGlom.getM_decimal_places());

682 numFormatJava.setMinimumFractionDigits(digits);

683 numFormatJava.setMaximumFractionDigits(digits);

684 }

685 numFormatJava.setGroupingUsed(numFormatGlom.getM_use_thousands_separator());

686 return numFormatJava;

687 }

688

689 /*

690 * Converts a Gdk::Color (16-bits per channel) to an HTML colour (8-bits per channel) by discarding the least

691 * significant 8-bits in each channel.

692 */

693 private String convertGdkColorToHtmlColour(String gdkColor) {

694 if (gdkColor.length() == 13)

695 return gdkColor.substring(0, 3) + gdkColor.substring(5, 7) + gdkColor.substring(9, 11);

696 else if (gdkColor.length() == 7) {

697 // This shouldn't happen but let's deal with it if it does.

698 Log.warn("convertGdkColorToHtmlColour(): Expected a 13 character string but received a 7 character string. Returning received string.");

699 return gdkColor;

700 } else {

701 Log.error("convertGdkColorToHtmlColour(): Did not receive a 13 or 7 character string. Returning black HTML colour code.");

702 return "#000000";

703 }

704 }

705

706 /*

707 * This method converts a FieldFormatting.HorizontalAlignment to the equivalent ColumnInfo.HorizontalAlignment. The

708 * need for this comes from the fact that the GWT HorizontalAlignment classes can't be used with RPC and there's no

709 * easy way to use the java-libglom FieldFormatting.HorizontalAlignment enum with RPC. An enum identical to

710 * FieldFormatting.HorizontalAlignment is included in the ColumnInfo class.

711 */

712 private ColumnInfo.HorizontalAlignment getColumnInfoHorizontalAlignment(

713 FieldFormatting.HorizontalAlignment alignment) {

714 switch (alignment) {

715 case HORIZONTAL_ALIGNMENT_AUTO:

716 return ColumnInfo.HorizontalAlignment.HORIZONTAL_ALIGNMENT_AUTO;

717 case HORIZONTAL_ALIGNMENT_LEFT:

718 return ColumnInfo.HorizontalAlignment.HORIZONTAL_ALIGNMENT_LEFT;

719 case HORIZONTAL_ALIGNMENT_RIGHT:

720 return ColumnInfo.HorizontalAlignment.HORIZONTAL_ALIGNMENT_RIGHT;

721 default:

722 Log.error("getColumnInfoGlomFieldType(): Recieved an alignment that I don't know about: "

723 + FieldFormatting.HorizontalAlignment.class.getName() + "." + alignment.toString() + ". Returning "

724 + ColumnInfo.HorizontalAlignment.HORIZONTAL_ALIGNMENT_RIGHT.toString() + ".");

725 return ColumnInfo.HorizontalAlignment.HORIZONTAL_ALIGNMENT_RIGHT;

726 }

727 }

728

729 /*

730 * This method converts a Field.glom_field_type to the equivalent ColumnInfo.FieldType. The need for this comes from

731 * the fact that the GWT FieldType classes can't be used with RPC and there's no easy way to use the java-libglom

732 * Field.glom_field_type enum with RPC. An enum identical to FieldFormatting.glom_field_type is included in the

733 * ColumnInfo class.

734 */

735 private ColumnInfo.GlomFieldType getColumnInfoGlomFieldType(Field.glom_field_type type) {

736 switch (type) {

737 case TYPE_BOOLEAN:

738 return ColumnInfo.GlomFieldType.TYPE_BOOLEAN;

739 case TYPE_DATE:

740 return ColumnInfo.GlomFieldType.TYPE_DATE;

741 case TYPE_IMAGE:

742 return ColumnInfo.GlomFieldType.TYPE_IMAGE;

743 case TYPE_NUMERIC:

744 return ColumnInfo.GlomFieldType.TYPE_NUMERIC;

745 case TYPE_TEXT:

746 return ColumnInfo.GlomFieldType.TYPE_TEXT;

747 case TYPE_TIME:

748 return ColumnInfo.GlomFieldType.TYPE_TIME;

749 case TYPE_INVALID:

750 Log.info("getColumnInfoGlomFieldType(): Returning TYPE_INVALID.");

751 return ColumnInfo.GlomFieldType.TYPE_INVALID;

752 default:

753 Log.error("getColumnInfoGlomFieldType(): Recieved a type that I don't know about: "

754 + Field.glom_field_type.class.getName() + "." + type.toString() + ". Returning "

755 + ColumnInfo.GlomFieldType.TYPE_INVALID.toString() + ".");

756 return ColumnInfo.GlomFieldType.TYPE_INVALID;

757 }

758 }

759

760 /*

761 * (non-Javadoc)

762 *

763 * @see org.glom.web.client.OnlineGlomService#isAuthenticated(java.lang.String)

764 */

765 public boolean isAuthenticated(String documentTitle) {

766 return documents.get(documentTitle).isAuthenticated();

767 }

768

769 /*

770 * (non-Javadoc)

771 *

772 * @see org.glom.web.client.OnlineGlomService#checkAuthentication(java.lang.String, java.lang.String,

773 * java.lang.String)

774 */

775 public boolean checkAuthentication(String documentTitle, String username, String password) {

776 ConfiguredDocument configuredDoc = documents.get(documentTitle);

777 boolean authenticated;

778 try {

779 authenticated = checkAuthentication(documentTitle, configuredDoc.getCpds(), username, password);

780 } catch (SQLException e) {

781 Log.error("", e);

782 return false;

783 }

784 configuredDoc.setAuthenticated(authenticated);

785 return authenticated;

786 }

787

788 }