001 /* 002 * The MIT License 003 * 004 * Copyright (c) 2012-2013, Ninja Squad 005 * 006 * Permission is hereby granted, free of charge, to any person obtaining a copy 007 * of this software and associated documentation files (the "Software"), to deal 008 * in the Software without restriction, including without limitation the rights 009 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 010 * copies of the Software, and to permit persons to whom the Software is 011 * furnished to do so, subject to the following conditions: 012 * 013 * The above copyright notice and this permission notice shall be included in 014 * all copies or substantial portions of the Software. 015 * 016 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 017 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 018 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 019 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 020 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 021 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 022 * THE SOFTWARE. 023 */ 024 025 package com.ninja_squad.dbsetup.operation; 026 027 import com.ninja_squad.dbsetup.bind.Binder; 028 import com.ninja_squad.dbsetup.bind.BinderConfiguration; 029 import com.ninja_squad.dbsetup.bind.Binders; 030 import com.ninja_squad.dbsetup.generator.ValueGenerator; 031 import com.ninja_squad.dbsetup.generator.ValueGenerators; 032 import com.ninja_squad.dbsetup.util.Preconditions; 033 034 import javax.annotation.Nonnull; 035 import javax.annotation.concurrent.Immutable; 036 import java.sql.Connection; 037 import java.sql.ParameterMetaData; 038 import java.sql.PreparedStatement; 039 import java.sql.SQLException; 040 import java.util.ArrayList; 041 import java.util.Arrays; 042 import java.util.HashMap; 043 import java.util.HashSet; 044 import java.util.Iterator; 045 import java.util.LinkedHashMap; 046 import java.util.List; 047 import java.util.Map; 048 import java.util.Set; 049 050 /** 051 * Operation which inserts one or several rows into a table. Example usage: 052 * <pre> 053 * Insert insert = 054 * Insert.into("CLIENT") 055 * .columns("CLIENT_ID", "FIRST_NAME", "LAST_NAME", "DATE_OF_BIRTH", "CLIENT_TYPE") 056 * .values(1L, "John", "Doe", "1975-07-19", ClientType.NORMAL) 057 * .values(2L, "Jack", "Smith", "1969-08-22", ClientType.HIGH_PRIORITY) 058 * .withDefaultValue("DELETED", false) 059 * .withDefaultValue("VERSION", 1) 060 * .withBinder(new ClientTypeBinder(), "CLIENT_TYPE") 061 * .build(); 062 * </pre> 063 * 064 * The above operation will insert two rows inside the CLIENT table. For each row, the column DELETED will be set to 065 * <code>false</code> and the column VERSION will be set to 1. For the column CLIENT_TYPE, instead of using the 066 * {@link Binder} associated to the type of the column found in the metadata of the table, a custom binder will be used. 067 * <p> 068 * Instead of specifying values as an ordered sequence which must match the sequence of column names, some might prefer 069 * passing a map of column/value associations. This makes things more verbose, but can be more readable in some cases, 070 * when the number of columns is high. This also allows not specifying any value for columns that must stay null. 071 * The map can be constructed like any other map and passed to the builder, or it can be added using a fluent builder. 072 * The following snippet: 073 * 074 * <pre> 075 * Insert insert = 076 * Insert.into("CLIENT") 077 * .columns("CLIENT_ID", "FIRST_NAME", "LAST_NAME", "DATE_OF_BIRTH", "CLIENT_TYPE") 078 * .row().column("CLIENT_ID", 1L) 079 * .column("FIRST_NAME", "John") 080 * .column("LAST_NAME", "Doe") 081 * .column("DATE_OF_BIRTH", "1975-07-19") 082 * .end() 083 * .row().column("CLIENT_ID", 2L) 084 * .column("FIRST_NAME", "Jack") 085 * .column("LAST_NAME", "Smith") 086 * .end() // null date of birth, because it's not in the row 087 * .build(); 088 * </pre> 089 * 090 * is thus equivalent to: 091 * 092 * <pre> 093 * Map<String, Object> johnDoe = new HashMap<String, Object>(); 094 * johnDoe.put("CLIENT_ID", 1L); 095 * johnDoe.put("FIRST_NAME", "John"); 096 * johnDoe.put("LAST_NAME", "Doe"); 097 * johnDoe.put("DATE_OF_BIRTH", "1975-07-19"); 098 * 099 * Map<String, Object> jackSmith = new HashMap<String, Object>(); 100 * jackSmith.put("CLIENT_ID", 2L); 101 * jackSmith.put("FIRST_NAME", "Jack"); 102 * jackSmith.put("LAST_NAME", "Smith"); 103 * 104 * Insert insert = 105 * Insert.into("CLIENT") 106 * .columns("CLIENT_ID", "FIRST_NAME", "LAST_NAME", "DATE_OF_BIRTH", "CLIENT_TYPE") 107 * .values(johnDoe) 108 * .values(jackSmith) 109 * .build(); 110 * </pre> 111 * 112 * When building the Insert using column/value associations, it might seem redundant to specify the set of column names 113 * before inserting the rows. Remember, though, that all the rows of an Insert are inserted using the same 114 * parameterized SQL query. We thus need a robust and easy way to know all the columns to insert for every row of the 115 * insert. To be able to spot errors easily and early, and to avoid complex rules, the rule is thus simple: the set of 116 * columns (excluding the generated ones) is specified either by columns(), or by the columns of the first row. All the 117 * subsequent rows may not have additional columns. And <code>null</code> is inserted for all the absent columns of the 118 * subsequent rows. The above example can thus be written as 119 * 120 * <pre> 121 * Insert insert = 122 * Insert.into("CLIENT") 123 * .row().column("CLIENT_ID", 1L) 124 * .column("FIRST_NAME", "John") 125 * .column("LAST_NAME", "Doe") 126 * .column("DATE_OF_BIRTH", "1975-07-19") 127 * .end() 128 * .row().column("CLIENT_ID", 2L) 129 * .column("FIRST_NAME", "Jack") 130 * .column("LAST_NAME", "Smith") 131 * .end() // null date of birth, because it's not in the row 132 * .build(); 133 * </pre> 134 * 135 * but the following will throw an exception, because the DATE_OF_BIRTH column is not part of the first row: 136 * 137 * <pre> 138 * Insert insert = 139 * Insert.into("CLIENT") 140 * .row().column("CLIENT_ID", 2L) 141 * .column("FIRST_NAME", "Jack") 142 * .column("LAST_NAME", "Smith") 143 * .column("CLIENT_TYPE", ClientType.HIGH_PRIORITY) 144 * .end() 145 * .row().column("CLIENT_ID", 1L) 146 * .column("FIRST_NAME", "John") 147 * .column("LAST_NAME", "Doe") 148 * .column("DATE_OF_BIRTH", "1975-07-19") 149 * .column("CLIENT_TYPE", ClientType.NORMAL) 150 * .end() 151 * .build(); 152 * </pre> 153 * 154 * @author JB Nizet 155 */ 156 @Immutable 157 public final class Insert implements Operation { 158 private final String table; 159 private final List<String> columnNames; 160 private final Map<String, List<Object>> generatedValues; 161 private final List<List<?>> rows; 162 private final boolean metadataUsed; 163 164 private final Map<String, Binder> binders; 165 166 private Insert(Builder builder) { 167 this.table = builder.table; 168 this.columnNames = builder.columnNames; 169 this.rows = builder.rows; 170 this.generatedValues = generateValues(builder.valueGenerators, rows.size()); 171 this.binders = builder.binders; 172 this.metadataUsed = builder.metadataUsed; 173 } 174 175 private Map<String, List<Object>> generateValues(Map<String, ValueGenerator<?>> valueGenerators, 176 int count) { 177 Map<String, List<Object>> result = new LinkedHashMap<String, List<Object>>(); 178 for (Map.Entry<String, ValueGenerator<?>> entry : valueGenerators.entrySet()) { 179 result.put(entry.getKey(), generateValues(entry.getValue(), count)); 180 } 181 return result; 182 } 183 184 private List<Object> generateValues(ValueGenerator<?> valueGenerator, int count) { 185 List<Object> result = new ArrayList<Object>(count); 186 for (int i = 0; i < count; i++) { 187 result.add(valueGenerator.nextValue()); 188 } 189 return result; 190 } 191 192 /** 193 * Inserts the values and generated values in the table. Unless <code>useMetadata</code> has been set to 194 * <code>false</code>, the given configuration is used to get the appropriate binder. Nevertheless, if a binder 195 * has explicitely been associated to a given column, this binder will always be used for this column. 196 */ 197 @edu.umd.cs.findbugs.annotations.SuppressWarnings( 198 value = "SQL_PREPARED_STATEMENT_GENERATED_FROM_NONCONSTANT_STRING", 199 justification = "The point here is precisely to compose a SQL String from column names coming from the user") 200 @Override 201 public void execute(Connection connection, BinderConfiguration configuration) throws SQLException { 202 List<String> allColumnNames = new ArrayList<String>(columnNames); 203 allColumnNames.addAll(generatedValues.keySet()); 204 205 String query = generateSqlQuery(allColumnNames); 206 207 PreparedStatement stmt = connection.prepareStatement(query); 208 209 try { 210 Map<String, Binder> usedBinders = initializeBinders(stmt, allColumnNames, configuration); 211 212 int rowIndex = 0; 213 for (List<?> row : rows) { 214 int i = 0; 215 for (Object value : row) { 216 String columnName = columnNames.get(i); 217 Binder binder = usedBinders.get(columnName); 218 binder.bind(stmt, i + 1, value); 219 i++; 220 } 221 for (Map.Entry<String, List<Object>> entry : generatedValues.entrySet()) { 222 String columnName = entry.getKey(); 223 List<Object> rowValues = entry.getValue(); 224 Binder binder = usedBinders.get(columnName); 225 binder.bind(stmt, i + 1, rowValues.get(rowIndex)); 226 i++; 227 } 228 229 stmt.executeUpdate(); 230 rowIndex++; 231 } 232 } 233 finally { 234 stmt.close(); 235 } 236 } 237 238 private String generateSqlQuery(List<String> allColumnNames) { 239 StringBuilder sql = new StringBuilder("insert into ").append(table).append(" ("); 240 for (Iterator<String> it = allColumnNames.iterator(); it.hasNext(); ) { 241 String columnName = it.next(); 242 sql.append(columnName); 243 if (it.hasNext()) { 244 sql.append(", "); 245 } 246 } 247 sql.append(") values ("); 248 for (Iterator<String> it = allColumnNames.iterator(); it.hasNext(); ) { 249 it.next(); 250 sql.append("?"); 251 if (it.hasNext()) { 252 sql.append(", "); 253 } 254 } 255 sql.append(")"); 256 257 return sql.toString(); 258 } 259 260 private Map<String, Binder> initializeBinders(PreparedStatement stmt, 261 List<String> allColumnNames, 262 BinderConfiguration configuration) throws SQLException { 263 Map<String, Binder> result = new HashMap<String, Binder>(); 264 ParameterMetaData metadata = null; 265 if (metadataUsed) { 266 try { 267 metadata = stmt.getParameterMetaData(); 268 } 269 catch (SQLException e) { 270 metadata = null; 271 // the parameter metadata are probably not supported by the database. Pass null to the configuration. 272 // The default configuration will return the default binder, just as if useMetadata(false) had been used 273 } 274 } 275 int i = 1; 276 for (String columnName : allColumnNames) { 277 Binder binder = this.binders.get(columnName); 278 if (binder == null) { 279 binder = configuration.getBinder(metadata, i); 280 if (binder == null) { 281 throw new IllegalStateException("null binder returned from configuration " 282 + configuration.getClass()); 283 } 284 } 285 result.put(columnName, binder); 286 i++; 287 } 288 return result; 289 } 290 291 @Override 292 public String toString() { 293 return "insert into " 294 + table 295 + " [columns=" 296 + columnNames 297 + ", generatedValues=" 298 + generatedValues 299 + ", rows=" 300 + rows 301 + ", metadataUsed=" 302 + metadataUsed 303 + ", binders=" 304 + binders 305 + "]"; 306 307 } 308 309 @Override 310 public int hashCode() { 311 final int prime = 31; 312 int result = 1; 313 result = prime * result + binders.hashCode(); 314 result = prime * result + columnNames.hashCode(); 315 result = prime * result + generatedValues.hashCode(); 316 result = prime * result + Boolean.valueOf(metadataUsed).hashCode(); 317 result = prime * result + rows.hashCode(); 318 result = prime * result + table.hashCode(); 319 return result; 320 } 321 322 @Override 323 public boolean equals(Object obj) { 324 if (this == obj) { 325 return true; 326 } 327 if (obj == null) { 328 return false; 329 } 330 if (getClass() != obj.getClass()) { 331 return false; 332 } 333 Insert other = (Insert) obj; 334 335 return binders.equals(other.binders) 336 && columnNames.equals(other.columnNames) 337 && generatedValues.equals(other.generatedValues) 338 && metadataUsed == other.metadataUsed 339 && rows.equals(other.rows) 340 && table.equals(other.table); 341 } 342 343 /** 344 * Creates a new Builder instance, in order to build an Insert operation into the given table 345 * @param table the name of the table to insert into 346 * @return the created Builder 347 */ 348 public static Builder into(@Nonnull String table) { 349 Preconditions.checkNotNull(table, "table may not be null"); 350 return new Builder(table); 351 } 352 353 /** 354 * A builder used to create an Insert operation. Such a builder may only be used once. Once it has built its Insert 355 * operation, all its methods throw an {@link IllegalStateException}. 356 * @see Insert 357 * @see Insert#into(String) 358 * @author JB Nizet 359 */ 360 public static final class Builder { 361 private final String table; 362 private final List<String> columnNames = new ArrayList<String>(); 363 private final Map<String, ValueGenerator<?>> valueGenerators = new LinkedHashMap<String, ValueGenerator<?>>(); 364 private final List<List<?>> rows = new ArrayList<List<?>>(); 365 366 private boolean metadataUsed = true; 367 private final Map<String, Binder> binders = new HashMap<String, Binder>(); 368 369 private boolean built; 370 371 private Builder(String table) { 372 this.table = table; 373 } 374 375 /** 376 * Specifies the list of columns into which values will be inserted. The values must the be specified, after, 377 * using the {@link #values(Object...)} method, or with the {@link #values(java.util.Map)} method, or by adding 378 * a row with named columns fluently using {@link #row()}. 379 * @param columns the names of the columns to insert into. 380 * @return this Builder instance, for chaining. 381 * @throws IllegalStateException if the Insert has already been built, or if this method has already been 382 * called, or if one of the given columns is also specified as one of the generated value columns, or if the 383 * set of columns has already been defined by adding a first row to the builder. 384 */ 385 public Builder columns(@Nonnull String... columns) { 386 Preconditions.checkState(!built, "The insert has already been built"); 387 Preconditions.checkState(columnNames.isEmpty(), "columns have already been specified"); 388 for (String column : columns) { 389 Preconditions.checkNotNull(column, "column may not be null"); 390 Preconditions.checkState(!valueGenerators.containsKey(column), 391 "column " 392 + column 393 + " has already been specified as generated value column"); 394 } 395 columnNames.addAll(Arrays.asList(columns)); 396 return this; 397 } 398 399 /** 400 * Adds a row of values to insert. 401 * @param values the values to insert. 402 * @return this Builder instance, for chaining. 403 * @throws IllegalStateException if the Insert has already been built, or if the number of values doesn't match 404 * the number of columns. 405 */ 406 public Builder values(@Nonnull Object... values) { 407 Preconditions.checkState(!built, "The insert has already been built"); 408 Preconditions.checkArgument(values.length == columnNames.size(), 409 "The number of values doesn't match the number of columns"); 410 rows.add(new ArrayList<Object>(Arrays.asList(values))); 411 return this; 412 } 413 414 /** 415 * Starts building a new row with named columns to insert. If the row is the first one being added and the 416 * columns haven't been set yet by calling <code>columns()</code>, then the columns of this row constitute the 417 * column names (excluding the generated ones) of the Insert being built 418 * @return a {@link RowBuilder} instance, which, when built, will add a row to this insert builder. 419 * @throws IllegalStateException if the Insert has already been built. 420 * @see RowBuilder 421 */ 422 public RowBuilder row() { 423 Preconditions.checkState(!built, "The insert has already been built"); 424 return new RowBuilder(this); 425 } 426 427 /** 428 * Adds a row to this builder. If no row has been added yet and the columns haven't been set yet by calling 429 * <code>columns()</code>, then the keys of this map constitute the column names (excluding the generated ones) 430 * of the Insert being built, in the order of the keys in the map (which is arbitrary unless an ordered or 431 * sorted map is used). 432 * @param row the row to add. The keys of the map are the column names, which must match with 433 * the column names specified in the call to {@link #columns(String...)}, or with the column names of the first 434 * added row. If a column name is not present in the map, null is inserted for this column. 435 * @return this Builder instance, for chaining. 436 * @throws IllegalStateException if the Insert has already been built. 437 * @throws IllegalArgumentException if a column name of the map doesn't match with any of the column names 438 * specified with {@link #columns(String...)} 439 */ 440 public Builder values(@Nonnull Map<String, ?> row) { 441 Preconditions.checkState(!built, "The insert has already been built"); 442 Preconditions.checkNotNull(row, "The row may not be null"); 443 444 boolean setColumns = rows.isEmpty() && columnNames.isEmpty(); 445 if (setColumns) { 446 columns(row.keySet().toArray(new String[row.size()])); 447 } 448 else { 449 Set<String> rowColumnNames = new HashSet<String>(row.keySet()); 450 rowColumnNames.removeAll(columnNames); 451 if (!rowColumnNames.isEmpty()) { 452 throw new IllegalArgumentException( 453 "The following columns of the row don't match with any column name: " + rowColumnNames); 454 } 455 } 456 457 List<Object> values = new ArrayList<Object>(columnNames.size()); 458 for (String columnName : columnNames) { 459 values.add(row.get(columnName)); 460 } 461 rows.add(values); 462 return this; 463 } 464 465 /** 466 * Associates a Binder to one or several columns. 467 * @param binder the binder to use, regardless of the metadata, for the given columns 468 * @param columns the name of the columns to associate with the given Binder 469 * @return this Builder instance, for chaining. 470 * @throws IllegalStateException if the Insert has already been built, 471 * @throws IllegalArgumentException if any of the given columns is not 472 * part of the columns or "generated value" columns. 473 */ 474 public Builder withBinder(@Nonnull Binder binder, @Nonnull String... columns) { 475 Preconditions.checkState(!built, "The insert has already been built"); 476 Preconditions.checkNotNull(binder, "binder may not be null"); 477 for (String columnName : columns) { 478 Preconditions.checkArgument(this.columnNames.contains(columnName) 479 || this.valueGenerators.containsKey(columnName), 480 "column " 481 + columnName 482 + " is not one of the registered column names"); 483 binders.put(columnName, binder); 484 } 485 return this; 486 } 487 488 /** 489 * Specifies a default value to be inserted in a column for all the rows inserted by the Insert operation. 490 * Calling this method is equivalent to calling 491 * <code>withGeneratedValue(column, ValueGenerators.constant(value))</code> 492 * @param column the name of the column 493 * @param value the default value to insert into the column 494 * @return this Builder instance, for chaining. 495 * @throws IllegalStateException if the Insert has already been built, or if the given column is part 496 * of the columns to insert. 497 */ 498 public Builder withDefaultValue(@Nonnull String column, Object value) { 499 return withGeneratedValue(column, ValueGenerators.constant(value)); 500 } 501 502 /** 503 * Allows the given column to be populated by a value generator, which will be called for every row of the 504 * Insert operation being built. 505 * @param column the name of the column 506 * @param valueGenerator the generator generating values for the given column of every row 507 * @return this Builder instance, for chaining. 508 * @throws IllegalStateException if the Insert has already been built, or if the given column is part 509 * of the columns to insert. 510 */ 511 public Builder withGeneratedValue(@Nonnull String column, @Nonnull ValueGenerator<?> valueGenerator) { 512 Preconditions.checkState(!built, "The insert has already been built"); 513 Preconditions.checkNotNull(column, "column may not be null"); 514 Preconditions.checkNotNull(valueGenerator, "valueGenerator may not be null"); 515 Preconditions.checkArgument(!columnNames.contains(column), 516 "column " 517 + column 518 + " is already listed in the list of column names"); 519 valueGenerators.put(column, valueGenerator); 520 return this; 521 } 522 523 /** 524 * Determines if the metadata must be used to get the appropriate binder for each inserted column (except 525 * the ones which have been associated explicitely with a Binder). The default is <code>true</code>. The insert 526 * can be faster if set to <code>false</code>, but in this case, the binder used will be the one returned 527 * by the {@link BinderConfiguration} for a null metadata (which is, by default, the 528 * {@link Binders#defaultBinder() default binder}), except the ones which have been associated explicitely with 529 * a Binder.<br/> 530 * Before version 1.3.0, a SQLException was thrown if the database doesn't support parameter metadata and 531 * <code>useMetadata(false)</code> wasn't called. Since version 1.3.0, if <code>useMetadata</code> is true 532 * (the default) but the database doesn't support metadata, then the default binder configuration returns the 533 * default binder. Using this method is thus normally unnecessary as of 1.3.0. 534 * @return this Builder instance, for chaining. 535 * @throws IllegalStateException if the Insert has already been built. 536 */ 537 public Builder useMetadata(boolean useMetadata) { 538 Preconditions.checkState(!built, "The insert has already been built"); 539 this.metadataUsed = useMetadata; 540 return this; 541 } 542 543 /** 544 * Builds the Insert operation. 545 * @return the created Insert operation. 546 * @throws IllegalStateException if the Insert has already been built, or if no column and no generated value 547 * column has been specified. 548 */ 549 public Insert build() { 550 Preconditions.checkState(!built, "The insert has already been built"); 551 Preconditions.checkState(!this.columnNames.isEmpty() || !this.valueGenerators.isEmpty(), 552 "no column and no generated value column has been specified"); 553 built = true; 554 return new Insert(this); 555 } 556 } 557 558 /** 559 * A row builder, constructed with {@link com.ninja_squad.dbsetup.operation.Insert.Builder#row()}. This builder 560 * allows adding a row with named columns to an Insert: 561 * 562 * <pre> 563 * Insert insert = 564 * Insert.into("CLIENT") 565 * .columns("CLIENT_ID", "FIRST_NAME", "LAST_NAME", "DATE_OF_BIRTH", "CLIENT_TYPE") 566 * .row().column("CLIENT_ID", 1L) 567 * .column("FIRST_NAME", "John") 568 * .column("LAST_NAME", "Doe") 569 * .column("DATE_OF_BIRTH", "1975-07-19") 570 * .column("CLIENT_TYPE", ClientType.NORMAL) 571 * .end() 572 * .row().column("CLIENT_ID", 2L) 573 * .column("FIRST_NAME", "Jack") 574 * .column("LAST_NAME", "Smith") 575 * .column("DATE_OF_BIRTH", "1969-08-22") 576 * .column("CLIENT_TYPE", ClientType.HIGH_PRIORITY) 577 * .end() 578 * .build(); 579 * </pre> 580 * 581 * You may omit the call to <code>columns()</code>. In that case, the columns of the Insert will be the columns 582 * specified in the first added row. 583 */ 584 public static final class RowBuilder { 585 private final Builder builder; 586 private final Map<String, Object> row; 587 private boolean ended; 588 589 private RowBuilder(Builder builder) { 590 this.builder = builder; 591 // note: very important to use a LinkedHashMap here, to guarantee the ordering of the columns. 592 this.row = new LinkedHashMap<String, Object>(); 593 } 594 595 /** 596 * Adds a new named column to the row. If a previous value has already been added for the same column, it's 597 * replaced by this new value. 598 * @param name the name of the column, which must match with a column name defined in the Insert Builder 599 * @param value the value of the column for the constructed row 600 * @return this builder, for chaining 601 * @throws IllegalArgumentException if the given name is not the name of one of the columns to insert 602 */ 603 public RowBuilder column(@Nonnull String name, Object value) { 604 Preconditions.checkState(!ended, "The row has already been ended and added to the Insert Builder"); 605 if (!builder.columnNames.isEmpty()) { 606 Preconditions.checkNotNull(name, "the column name may not be null"); 607 Preconditions.checkArgument(builder.columnNames.contains(name), 608 "column " + name + " is not one of the registered column names"); 609 } 610 row.put(name, value); 611 return this; 612 } 613 614 /** 615 * Ends the row, adds it to the Insert Builder and returns it, for chaining. 616 * @return the Insert Builder 617 */ 618 public Builder end() { 619 Preconditions.checkState(!ended, "The row has already been ended and added to the Insert Builder"); 620 ended = true; 621 return builder.values(row); 622 } 623 } 624 }