001 /*
002 // $Id: //open/mondrian/src/main/mondrian/olap4j/EmptyResultSet.java#1 $
003 // This software is subject to the terms of the Common Public License
004 // Agreement, available at the following URL:
005 // http://www.opensource.org/licenses/cpl.html.
006 // Copyright (C) 2007-2007 Julian Hyde
007 // All Rights Reserved.
008 // You must accept the terms of that agreement to use this software.
009 */
010 package mondrian.olap4j;
011
012 import org.olap4j.OlapWrapper;
013
014 import javax.sql.rowset.RowSetMetaDataImpl;
015 import java.sql.*;
016 import java.sql.Date;
017 import java.math.BigDecimal;
018 import java.io.InputStream;
019 import java.io.Reader;
020 import java.util.*;
021 import java.net.URL;
022
023 /**
024 * Implementation of {@link ResultSet} which returns 0 rows.
025 *
026 * <p>This class is used to implement {@link java.sql.DatabaseMetaData}
027 * methods for querying object types where those object types never have
028 * any instances for this particular driver.</p>
029 *
030 * <p>This class has sub-classes which implement JDBC 3.0 and JDBC 4.0 APIs;
031 * it is instantiated using {@link Factory#newEmptyResultSet}.</p>
032 *
033 * @author jhyde
034 * @version $Id: //open/mondrian/src/main/mondrian/olap4j/EmptyResultSet.java#1 $
035 * @since May 24, 2007
036 */
037 abstract class EmptyResultSet implements ResultSet, OlapWrapper {
038 final MondrianOlap4jConnection olap4jConnection;
039 private final List<String> headerList;
040 private final List<List<Object>> rowList;
041 private int rowOrdinal = -1;
042 private final RowSetMetaDataImpl metaData = new RowSetMetaDataImpl();
043
044 EmptyResultSet(
045 MondrianOlap4jConnection olap4jConnection,
046 List<String> headerList,
047 List<List<Object>> rowList)
048 {
049 this.olap4jConnection = olap4jConnection;
050 this.headerList = headerList;
051 this.rowList = rowList;
052 try {
053 metaData.setColumnCount(headerList.size());
054 for (int i = 0; i < headerList.size(); i++) {
055 metaData.setColumnName(i + 1, headerList.get(i));
056 }
057 } catch (SQLException e) {
058 throw new RuntimeException(e);
059 }
060 }
061
062 // helper methods
063
064 /**
065 * Returns the value of a given column
066 * @param columnOrdinal 0-based ordinal
067 * @return Value
068 */
069 private Object getColumn(int columnOrdinal) {
070 return rowList.get(rowOrdinal).get(columnOrdinal);
071 }
072
073 private Object getColumn(String columnLabel) throws SQLException {
074 int column = headerList.indexOf(columnLabel);
075 if (column < 0) {
076 throw new SQLException("Column not found: " + columnLabel);
077 }
078 return rowList.get(rowOrdinal).get(column);
079 }
080
081 // implement ResultSet
082
083 public boolean next() throws SQLException {
084 // note that if rowOrdinal == rowList.size - 1, we move but then return
085 // false
086 if (rowOrdinal < rowList.size()) {
087 ++rowOrdinal;
088 }
089 return rowOrdinal < rowList.size();
090 }
091
092 public void close() throws SQLException {
093 }
094
095 public boolean wasNull() throws SQLException {
096 throw new UnsupportedOperationException();
097 }
098
099 public String getString(int columnIndex) throws SQLException {
100 return String.valueOf(getColumn(columnIndex - 1));
101 }
102
103 public boolean getBoolean(int columnIndex) throws SQLException {
104 Object o = getColumn(columnIndex - 1);
105 if (o instanceof Boolean) {
106 return (Boolean) o;
107 } else if (o instanceof String) {
108 return Boolean.valueOf((String) o);
109 } else {
110 return !o.equals(0);
111 }
112 }
113
114 public byte getByte(int columnIndex) throws SQLException {
115 Object o = getColumn(columnIndex - 1);
116 return ((Number) o).byteValue();
117 }
118
119 public short getShort(int columnIndex) throws SQLException {
120 Object o = getColumn(columnIndex - 1);
121 return ((Number) o).shortValue();
122 }
123
124 public int getInt(int columnIndex) throws SQLException {
125 Object o = getColumn(columnIndex - 1);
126 return ((Number) o).intValue();
127 }
128
129 public long getLong(int columnIndex) throws SQLException {
130 Object o = getColumn(columnIndex - 1);
131 return ((Number) o).longValue();
132 }
133
134 public float getFloat(int columnIndex) throws SQLException {
135 Object o = getColumn(columnIndex - 1);
136 return ((Number) o).floatValue();
137 }
138
139 public double getDouble(int columnIndex) throws SQLException {
140 Object o = getColumn(columnIndex - 1);
141 return ((Number) o).doubleValue();
142 }
143
144 public BigDecimal getBigDecimal(
145 int columnIndex, int scale) throws SQLException {
146 throw new UnsupportedOperationException();
147 }
148
149 public byte[] getBytes(int columnIndex) throws SQLException {
150 Object o = getColumn(columnIndex - 1);
151 return (byte[]) o;
152 }
153
154 public Date getDate(int columnIndex) throws SQLException {
155 Object o = getColumn(columnIndex - 1);
156 return (Date) o;
157 }
158
159 public Time getTime(int columnIndex) throws SQLException {
160 Object o = getColumn(columnIndex - 1);
161 return (Time) o;
162 }
163
164 public Timestamp getTimestamp(int columnIndex) throws SQLException {
165 Object o = getColumn(columnIndex - 1);
166 return (Timestamp) o;
167 }
168
169 public InputStream getAsciiStream(int columnIndex) throws SQLException {
170 throw new UnsupportedOperationException();
171 }
172
173 public InputStream getUnicodeStream(int columnIndex) throws SQLException {
174 throw new UnsupportedOperationException();
175 }
176
177 public InputStream getBinaryStream(int columnIndex) throws SQLException {
178 throw new UnsupportedOperationException();
179 }
180
181 public String getString(String columnLabel) throws SQLException {
182 Object o = getColumn(columnLabel);
183 return String.valueOf(o);
184 }
185
186 public boolean getBoolean(String columnLabel) throws SQLException {
187 Object o = getColumn(columnLabel);
188 if (o instanceof Boolean) {
189 return (Boolean) o;
190 } else if (o instanceof String) {
191 return Boolean.valueOf((String) o);
192 } else {
193 return !o.equals(0);
194 }
195 }
196
197 public byte getByte(String columnLabel) throws SQLException {
198 Object o = getColumn(columnLabel);
199 return ((Number) o).byteValue();
200 }
201
202 public short getShort(String columnLabel) throws SQLException {
203 Object o = getColumn(columnLabel);
204 return ((Number) o).shortValue();
205 }
206
207 public int getInt(String columnLabel) throws SQLException {
208 Object o = getColumn(columnLabel);
209 return ((Number) o).intValue();
210 }
211
212 public long getLong(String columnLabel) throws SQLException {
213 Object o = getColumn(columnLabel);
214 return ((Number) o).longValue();
215 }
216
217 public float getFloat(String columnLabel) throws SQLException {
218 Object o = getColumn(columnLabel);
219 return ((Number) o).floatValue();
220 }
221
222 public double getDouble(String columnLabel) throws SQLException {
223 Object o = getColumn(columnLabel);
224 return ((Number) o).doubleValue();
225 }
226
227 public BigDecimal getBigDecimal(
228 String columnLabel, int scale) throws SQLException {
229 throw new UnsupportedOperationException();
230 }
231
232 public byte[] getBytes(String columnLabel) throws SQLException {
233 Object o = getColumn(columnLabel);
234 return (byte[]) o;
235 }
236
237 public Date getDate(String columnLabel) throws SQLException {
238 Object o = getColumn(columnLabel);
239 return (Date) o;
240 }
241
242 public Time getTime(String columnLabel) throws SQLException {
243 Object o = getColumn(columnLabel);
244 return (Time) o;
245 }
246
247 public Timestamp getTimestamp(String columnLabel) throws SQLException {
248 Object o = getColumn(columnLabel);
249 return (Timestamp) o;
250 }
251
252 public InputStream getAsciiStream(String columnLabel) throws SQLException {
253 throw new UnsupportedOperationException();
254 }
255
256 public InputStream getUnicodeStream(String columnLabel) throws SQLException {
257 throw new UnsupportedOperationException();
258 }
259
260 public InputStream getBinaryStream(String columnLabel) throws SQLException {
261 throw new UnsupportedOperationException();
262 }
263
264 public SQLWarning getWarnings() throws SQLException {
265 throw new UnsupportedOperationException();
266 }
267
268 public void clearWarnings() throws SQLException {
269 throw new UnsupportedOperationException();
270 }
271
272 public String getCursorName() throws SQLException {
273 throw new UnsupportedOperationException();
274 }
275
276 public ResultSetMetaData getMetaData() throws SQLException {
277 return metaData;
278 }
279
280 public Object getObject(int columnIndex) throws SQLException {
281 throw new UnsupportedOperationException();
282 }
283
284 public Object getObject(String columnLabel) throws SQLException {
285 throw new UnsupportedOperationException();
286 }
287
288 public int findColumn(String columnLabel) throws SQLException {
289 throw new UnsupportedOperationException();
290 }
291
292 public Reader getCharacterStream(int columnIndex) throws SQLException {
293 throw new UnsupportedOperationException();
294 }
295
296 public Reader getCharacterStream(String columnLabel) throws SQLException {
297 throw new UnsupportedOperationException();
298 }
299
300 public BigDecimal getBigDecimal(int columnIndex) throws SQLException {
301 throw new UnsupportedOperationException();
302 }
303
304 public BigDecimal getBigDecimal(String columnLabel) throws SQLException {
305 throw new UnsupportedOperationException();
306 }
307
308 public boolean isBeforeFirst() throws SQLException {
309 return rowOrdinal < 0;
310 }
311
312 public boolean isAfterLast() throws SQLException {
313 return rowOrdinal >= rowList.size();
314 }
315
316 public boolean isFirst() throws SQLException {
317 return rowOrdinal == 0;
318 }
319
320 public boolean isLast() throws SQLException {
321 return rowOrdinal == rowList.size() - 1;
322 }
323
324 public void beforeFirst() throws SQLException {
325 rowOrdinal = -1;
326 }
327
328 public void afterLast() throws SQLException {
329 rowOrdinal = rowList.size();
330 }
331
332 public boolean first() throws SQLException {
333 if (rowList.size() == 0) {
334 return false;
335 } else {
336 rowOrdinal = 0;
337 return true;
338 }
339 }
340
341 public boolean last() throws SQLException {
342 if (rowList.size() == 0) {
343 return false;
344 } else {
345 rowOrdinal = rowList.size() - 1;
346 return true;
347 }
348 }
349
350 public int getRow() throws SQLException {
351 return rowOrdinal + 1; // 1-based
352 }
353
354 public boolean absolute(int row) throws SQLException {
355 int newRowOrdinal = row - 1;// convert to 0-based
356 if (newRowOrdinal >= 0 && newRowOrdinal < rowList.size()) {
357 rowOrdinal = newRowOrdinal;
358 return true;
359 } else {
360 return false;
361 }
362 }
363
364 public boolean relative(int rows) throws SQLException {
365 int newRowOrdinal = rowOrdinal + (rows - 1);
366 if (newRowOrdinal >= 0 && newRowOrdinal < rowList.size()) {
367 rowOrdinal = newRowOrdinal;
368 return true;
369 } else {
370 return false;
371 }
372 }
373
374 public boolean previous() throws SQLException {
375 // converse of next(); note that if rowOrdinal == 0, we decrement
376 // but return false
377 if (rowOrdinal >= 0) {
378 --rowOrdinal;
379 }
380 return rowOrdinal >= 0;
381 }
382
383 public void setFetchDirection(int direction) throws SQLException {
384 throw new UnsupportedOperationException();
385 }
386
387 public int getFetchDirection() throws SQLException {
388 throw new UnsupportedOperationException();
389 }
390
391 public void setFetchSize(int rows) throws SQLException {
392 throw new UnsupportedOperationException();
393 }
394
395 public int getFetchSize() throws SQLException {
396 throw new UnsupportedOperationException();
397 }
398
399 public int getType() throws SQLException {
400 throw new UnsupportedOperationException();
401 }
402
403 public int getConcurrency() throws SQLException {
404 throw new UnsupportedOperationException();
405 }
406
407 public boolean rowUpdated() throws SQLException {
408 throw new UnsupportedOperationException();
409 }
410
411 public boolean rowInserted() throws SQLException {
412 throw new UnsupportedOperationException();
413 }
414
415 public boolean rowDeleted() throws SQLException {
416 throw new UnsupportedOperationException();
417 }
418
419 public void updateNull(int columnIndex) throws SQLException {
420 throw new UnsupportedOperationException();
421 }
422
423 public void updateBoolean(int columnIndex, boolean x) throws SQLException {
424 throw new UnsupportedOperationException();
425 }
426
427 public void updateByte(int columnIndex, byte x) throws SQLException {
428 throw new UnsupportedOperationException();
429 }
430
431 public void updateShort(int columnIndex, short x) throws SQLException {
432 throw new UnsupportedOperationException();
433 }
434
435 public void updateInt(int columnIndex, int x) throws SQLException {
436 throw new UnsupportedOperationException();
437 }
438
439 public void updateLong(int columnIndex, long x) throws SQLException {
440 throw new UnsupportedOperationException();
441 }
442
443 public void updateFloat(int columnIndex, float x) throws SQLException {
444 throw new UnsupportedOperationException();
445 }
446
447 public void updateDouble(int columnIndex, double x) throws SQLException {
448 throw new UnsupportedOperationException();
449 }
450
451 public void updateBigDecimal(
452 int columnIndex, BigDecimal x) throws SQLException {
453 throw new UnsupportedOperationException();
454 }
455
456 public void updateString(int columnIndex, String x) throws SQLException {
457 throw new UnsupportedOperationException();
458 }
459
460 public void updateBytes(int columnIndex, byte x[]) throws SQLException {
461 throw new UnsupportedOperationException();
462 }
463
464 public void updateDate(int columnIndex, Date x) throws SQLException {
465 throw new UnsupportedOperationException();
466 }
467
468 public void updateTime(int columnIndex, Time x) throws SQLException {
469 throw new UnsupportedOperationException();
470 }
471
472 public void updateTimestamp(
473 int columnIndex, Timestamp x) throws SQLException {
474 throw new UnsupportedOperationException();
475 }
476
477 public void updateAsciiStream(
478 int columnIndex, InputStream x, int length) throws SQLException {
479 throw new UnsupportedOperationException();
480 }
481
482 public void updateBinaryStream(
483 int columnIndex, InputStream x, int length) throws SQLException {
484 throw new UnsupportedOperationException();
485 }
486
487 public void updateCharacterStream(
488 int columnIndex, Reader x, int length) throws SQLException {
489 throw new UnsupportedOperationException();
490 }
491
492 public void updateObject(
493 int columnIndex, Object x, int scaleOrLength) throws SQLException {
494 throw new UnsupportedOperationException();
495 }
496
497 public void updateObject(int columnIndex, Object x) throws SQLException {
498 throw new UnsupportedOperationException();
499 }
500
501 public void updateNull(String columnLabel) throws SQLException {
502 throw new UnsupportedOperationException();
503 }
504
505 public void updateBoolean(
506 String columnLabel, boolean x) throws SQLException {
507 throw new UnsupportedOperationException();
508 }
509
510 public void updateByte(String columnLabel, byte x) throws SQLException {
511 throw new UnsupportedOperationException();
512 }
513
514 public void updateShort(String columnLabel, short x) throws SQLException {
515 throw new UnsupportedOperationException();
516 }
517
518 public void updateInt(String columnLabel, int x) throws SQLException {
519 throw new UnsupportedOperationException();
520 }
521
522 public void updateLong(String columnLabel, long x) throws SQLException {
523 throw new UnsupportedOperationException();
524 }
525
526 public void updateFloat(String columnLabel, float x) throws SQLException {
527 throw new UnsupportedOperationException();
528 }
529
530 public void updateDouble(String columnLabel, double x) throws SQLException {
531 throw new UnsupportedOperationException();
532 }
533
534 public void updateBigDecimal(
535 String columnLabel, BigDecimal x) throws SQLException {
536 throw new UnsupportedOperationException();
537 }
538
539 public void updateString(String columnLabel, String x) throws SQLException {
540 throw new UnsupportedOperationException();
541 }
542
543 public void updateBytes(String columnLabel, byte x[]) throws SQLException {
544 throw new UnsupportedOperationException();
545 }
546
547 public void updateDate(String columnLabel, Date x) throws SQLException {
548 throw new UnsupportedOperationException();
549 }
550
551 public void updateTime(String columnLabel, Time x) throws SQLException {
552 throw new UnsupportedOperationException();
553 }
554
555 public void updateTimestamp(
556 String columnLabel, Timestamp x) throws SQLException {
557 throw new UnsupportedOperationException();
558 }
559
560 public void updateAsciiStream(
561 String columnLabel, InputStream x, int length) throws SQLException {
562 throw new UnsupportedOperationException();
563 }
564
565 public void updateBinaryStream(
566 String columnLabel, InputStream x, int length) throws SQLException {
567 throw new UnsupportedOperationException();
568 }
569
570 public void updateCharacterStream(
571 String columnLabel, Reader reader, int length) throws SQLException {
572 throw new UnsupportedOperationException();
573 }
574
575 public void updateObject(
576 String columnLabel, Object x, int scaleOrLength) throws SQLException {
577 throw new UnsupportedOperationException();
578 }
579
580 public void updateObject(String columnLabel, Object x) throws SQLException {
581 throw new UnsupportedOperationException();
582 }
583
584 public void insertRow() throws SQLException {
585 throw new UnsupportedOperationException();
586 }
587
588 public void updateRow() throws SQLException {
589 throw new UnsupportedOperationException();
590 }
591
592 public void deleteRow() throws SQLException {
593 throw new UnsupportedOperationException();
594 }
595
596 public void refreshRow() throws SQLException {
597 throw new UnsupportedOperationException();
598 }
599
600 public void cancelRowUpdates() throws SQLException {
601 throw new UnsupportedOperationException();
602 }
603
604 public void moveToInsertRow() throws SQLException {
605 throw new UnsupportedOperationException();
606 }
607
608 public void moveToCurrentRow() throws SQLException {
609 throw new UnsupportedOperationException();
610 }
611
612 public Statement getStatement() throws SQLException {
613 throw new UnsupportedOperationException();
614 }
615
616 public Object getObject(
617 int columnIndex, Map<String, Class<?>> map) throws SQLException {
618 throw new UnsupportedOperationException();
619 }
620
621 public Ref getRef(int columnIndex) throws SQLException {
622 throw new UnsupportedOperationException();
623 }
624
625 public Blob getBlob(int columnIndex) throws SQLException {
626 throw new UnsupportedOperationException();
627 }
628
629 public Clob getClob(int columnIndex) throws SQLException {
630 throw new UnsupportedOperationException();
631 }
632
633 public Array getArray(int columnIndex) throws SQLException {
634 throw new UnsupportedOperationException();
635 }
636
637 public Object getObject(
638 String columnLabel, Map<String, Class<?>> map) throws SQLException {
639 throw new UnsupportedOperationException();
640 }
641
642 public Ref getRef(String columnLabel) throws SQLException {
643 throw new UnsupportedOperationException();
644 }
645
646 public Blob getBlob(String columnLabel) throws SQLException {
647 throw new UnsupportedOperationException();
648 }
649
650 public Clob getClob(String columnLabel) throws SQLException {
651 throw new UnsupportedOperationException();
652 }
653
654 public Array getArray(String columnLabel) throws SQLException {
655 throw new UnsupportedOperationException();
656 }
657
658 public Date getDate(int columnIndex, Calendar cal) throws SQLException {
659 throw new UnsupportedOperationException();
660 }
661
662 public Date getDate(String columnLabel, Calendar cal) throws SQLException {
663 throw new UnsupportedOperationException();
664 }
665
666 public Time getTime(int columnIndex, Calendar cal) throws SQLException {
667 throw new UnsupportedOperationException();
668 }
669
670 public Time getTime(String columnLabel, Calendar cal) throws SQLException {
671 throw new UnsupportedOperationException();
672 }
673
674 public Timestamp getTimestamp(
675 int columnIndex, Calendar cal) throws SQLException {
676 throw new UnsupportedOperationException();
677 }
678
679 public Timestamp getTimestamp(
680 String columnLabel, Calendar cal) throws SQLException {
681 throw new UnsupportedOperationException();
682 }
683
684 public URL getURL(int columnIndex) throws SQLException {
685 throw new UnsupportedOperationException();
686 }
687
688 public URL getURL(String columnLabel) throws SQLException {
689 throw new UnsupportedOperationException();
690 }
691
692 public void updateRef(int columnIndex, Ref x) throws SQLException {
693 throw new UnsupportedOperationException();
694 }
695
696 public void updateRef(String columnLabel, Ref x) throws SQLException {
697 throw new UnsupportedOperationException();
698 }
699
700 public void updateBlob(int columnIndex, Blob x) throws SQLException {
701 throw new UnsupportedOperationException();
702 }
703
704 public void updateBlob(String columnLabel, Blob x) throws SQLException {
705 throw new UnsupportedOperationException();
706 }
707
708 public void updateClob(int columnIndex, Clob x) throws SQLException {
709 throw new UnsupportedOperationException();
710 }
711
712 public void updateClob(String columnLabel, Clob x) throws SQLException {
713 throw new UnsupportedOperationException();
714 }
715
716 public void updateArray(int columnIndex, Array x) throws SQLException {
717 throw new UnsupportedOperationException();
718 }
719
720 public void updateArray(String columnLabel, Array x) throws SQLException {
721 throw new UnsupportedOperationException();
722 }
723
724 // implement Wrapper
725
726 public <T> T unwrap(Class<T> iface) throws SQLException {
727 if (iface.isInstance(this)) {
728 return iface.cast(this);
729 }
730 throw olap4jConnection.helper.createException("cannot cast");
731 }
732
733 public boolean isWrapperFor(Class<?> iface) throws SQLException {
734 return iface.isInstance(this);
735 }
736 }
737
738 // End EmptyResultSet.java