Source Code Cross Referenced for RowSetMetaDataImpl.java in  » Apache-Harmony-Java-SE » javax-package » javax » sql » rowset » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Apache Harmony Java SE » javax package » javax.sql.rowset 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements. See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License. You may obtain a copy of the License at
008:         *
009:         * http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:
018:        package javax.sql.rowset;
019:
020:        import java.io.Serializable;
021:        import java.sql.ResultSetMetaData;
022:        import java.sql.SQLException;
023:
024:        import javax.sql.RowSetMetaData;
025:
026:        import org.apache.harmony.sql.internal.nls.Messages;
027:
028:        /**
029:         * This class is a concrete implementation of javax.sql.RowSetMetatData, which
030:         * provides methods that get and set column information.
031:         * 
032:         * A RowSetMetaDataImpl object can be obtained by the getMetaData() method in
033:         * javax.sql.RowSet.
034:         * 
035:         */
036:        public class RowSetMetaDataImpl implements  RowSetMetaData, Serializable {
037:
038:            private static final String EMPTY_STRING = ""; //$NON-NLS-1$
039:
040:            private static final int DEFAULT_COLUMN_COUNT = 5;
041:
042:            private static final long serialVersionUID = 6893806403181801867L;
043:
044:            private int colCount;
045:
046:            private ColInfo[] colInfo;
047:
048:            /**
049:             * The default constructor.
050:             */
051:            public RowSetMetaDataImpl() {
052:                // do nothing
053:            }
054:
055:            private void checkNegativeValue(int value, String msg)
056:                    throws SQLException {
057:                if (value < 0) {
058:                    throw new SQLException(Messages.getString(msg));
059:                }
060:            }
061:
062:            private void checkColumnIndex(int columnIndex) throws SQLException {
063:                if (null == colInfo || columnIndex < 1
064:                        || columnIndex >= colInfo.length) {
065:                    throw new SQLException(Messages.getString(
066:                            "sql.27", columnIndex + 1)); //$NON-NLS-1$
067:                }
068:                // lazy initialization
069:                if (null == colInfo[columnIndex]) {
070:                    colInfo[columnIndex] = new ColInfo();
071:                }
072:            }
073:
074:            /**
075:             * {@inheritDoc}
076:             * 
077:             * @see javax.sql.RowSetMetaData#setColumnCount(int)
078:             */
079:            public void setColumnCount(int columnCount) throws SQLException {
080:                if (columnCount <= 0) {
081:                    throw new SQLException(Messages.getString("sql.26")); //$NON-NLS-1$
082:                }
083:                try {
084:                    if (columnCount + 1 > 0) {
085:                        colInfo = new ColInfo[columnCount + 1];
086:                    } else {
087:                        colInfo = new ColInfo[DEFAULT_COLUMN_COUNT];
088:                    }
089:                } catch (OutOfMemoryError e) {
090:                    // For compatibility, use same default value as RI
091:                    colInfo = new ColInfo[DEFAULT_COLUMN_COUNT];
092:                }
093:                colCount = columnCount;
094:            }
095:
096:            /**
097:             * {@inheritDoc}
098:             * 
099:             * @see javax.sql.RowSetMetaData#setAutoIncrement(int, boolean)
100:             */
101:            public void setAutoIncrement(int columnIndex, boolean property)
102:                    throws SQLException {
103:                checkColumnIndex(columnIndex);
104:                colInfo[columnIndex].autoIncrement = property;
105:            }
106:
107:            /**
108:             * {@inheritDoc}
109:             * 
110:             * @see javax.sql.RowSetMetaData#setCaseSensitive(int, boolean)
111:             */
112:            public void setCaseSensitive(int columnIndex, boolean property)
113:                    throws SQLException {
114:                checkColumnIndex(columnIndex);
115:                colInfo[columnIndex].caseSensitive = property;
116:            }
117:
118:            /**
119:             * {@inheritDoc}
120:             * 
121:             * @see javax.sql.RowSetMetaData#setSearchable(int, boolean)
122:             */
123:            public void setSearchable(int columnIndex, boolean property)
124:                    throws SQLException {
125:                checkColumnIndex(columnIndex);
126:                colInfo[columnIndex].searchable = property;
127:            }
128:
129:            /**
130:             * {@inheritDoc}
131:             * 
132:             * @see javax.sql.RowSetMetaData#setCurrency(int, boolean)
133:             */
134:            public void setCurrency(int columnIndex, boolean property)
135:                    throws SQLException {
136:                checkColumnIndex(columnIndex);
137:                colInfo[columnIndex].currency = property;
138:            }
139:
140:            /**
141:             * {@inheritDoc}
142:             * 
143:             * @see javax.sql.RowSetMetaData#setNullable(int, int)
144:             */
145:            public void setNullable(int columnIndex, int property)
146:                    throws SQLException {
147:                if (property != ResultSetMetaData.columnNoNulls
148:                        && property != ResultSetMetaData.columnNullable
149:                        && property != ResultSetMetaData.columnNullableUnknown) {
150:                    throw new SQLException(Messages.getString("sql.29")); //$NON-NLS-1$
151:                }
152:
153:                checkColumnIndex(columnIndex);
154:                colInfo[columnIndex].nullable = property;
155:            }
156:
157:            /**
158:             * {@inheritDoc}
159:             * 
160:             * @see javax.sql.RowSetMetaData#setSigned(int, boolean)
161:             */
162:            public void setSigned(int columnIndex, boolean property)
163:                    throws SQLException {
164:                checkColumnIndex(columnIndex);
165:                colInfo[columnIndex].signed = property;
166:            }
167:
168:            /**
169:             * {@inheritDoc}
170:             * 
171:             * @see javax.sql.RowSetMetaData#setColumnDisplaySize(int, int)
172:             */
173:            public void setColumnDisplaySize(int columnIndex, int size)
174:                    throws SQLException {
175:                checkNegativeValue(size, "sql.30"); //$NON-NLS-1$
176:
177:                checkColumnIndex(columnIndex);
178:                colInfo[columnIndex].columnDisplaySize = size;
179:            }
180:
181:            /**
182:             * {@inheritDoc}
183:             * 
184:             * @see javax.sql.RowSetMetaData#setColumnLabel(int, String)
185:             */
186:            public void setColumnLabel(int columnIndex, String label)
187:                    throws SQLException {
188:                checkColumnIndex(columnIndex);
189:                colInfo[columnIndex].columnLabel = label == null ? EMPTY_STRING
190:                        : label;
191:            }
192:
193:            /**
194:             * {@inheritDoc}
195:             * 
196:             * @see javax.sql.RowSetMetaData#setColumnName(int, String)
197:             */
198:            public void setColumnName(int columnIndex, String columnName)
199:                    throws SQLException {
200:                checkColumnIndex(columnIndex);
201:                colInfo[columnIndex].columnName = columnName == null ? EMPTY_STRING
202:                        : columnName;
203:            }
204:
205:            /**
206:             * {@inheritDoc}
207:             * 
208:             * @see javax.sql.RowSetMetaData#setSchemaName(int, String)
209:             */
210:            public void setSchemaName(int columnIndex, String schemaName)
211:                    throws SQLException {
212:                checkColumnIndex(columnIndex);
213:                colInfo[columnIndex].schemaName = schemaName == null ? EMPTY_STRING
214:                        : schemaName;
215:            }
216:
217:            /**
218:             * {@inheritDoc}
219:             * 
220:             * @see javax.sql.RowSetMetaData#setPrecision(int, int)
221:             */
222:            public void setPrecision(int columnIndex, int precision)
223:                    throws SQLException {
224:                checkNegativeValue(precision, "sql.31"); //$NON-NLS-1$
225:
226:                checkColumnIndex(columnIndex);
227:                colInfo[columnIndex].precision = precision;
228:            }
229:
230:            /**
231:             * {@inheritDoc}
232:             * 
233:             * @see javax.sql.RowSetMetaData#setScale(int, int)
234:             */
235:            public void setScale(int columnIndex, int scale)
236:                    throws SQLException {
237:                checkNegativeValue(scale, "sql.32"); //$NON-NLS-1$
238:
239:                checkColumnIndex(columnIndex);
240:                colInfo[columnIndex].scale = scale;
241:            }
242:
243:            /**
244:             * {@inheritDoc}
245:             * 
246:             * @see javax.sql.RowSetMetaData#setTableName(int, String)
247:             */
248:            public void setTableName(int columnIndex, String tableName)
249:                    throws SQLException {
250:                checkColumnIndex(columnIndex);
251:                colInfo[columnIndex].tableName = tableName == null ? EMPTY_STRING
252:                        : tableName;
253:            }
254:
255:            /**
256:             * {@inheritDoc}
257:             * 
258:             * @see javax.sql.RowSetMetaData#setCatalogName(int, String)
259:             */
260:            public void setCatalogName(int columnIndex, String catalogName)
261:                    throws SQLException {
262:                checkColumnIndex(columnIndex);
263:                colInfo[columnIndex].catalogName = catalogName == null ? EMPTY_STRING
264:                        : catalogName;
265:            }
266:
267:            /**
268:             * {@inheritDoc}
269:             * 
270:             * @see javax.sql.RowSetMetaData#setColumnType(int, int)
271:             */
272:            public void setColumnType(int columnIndex, int SQLType)
273:                    throws SQLException {
274:                SqlUtil.validateType(SQLType);
275:
276:                checkColumnIndex(columnIndex);
277:                colInfo[columnIndex].colType = SQLType;
278:            }
279:
280:            /**
281:             * {@inheritDoc}
282:             * 
283:             * @see javax.sql.RowSetMetaData#setColumnTypeName(int, String)
284:             */
285:            public void setColumnTypeName(int columnIndex, String typeName)
286:                    throws SQLException {
287:                checkColumnIndex(columnIndex);
288:                colInfo[columnIndex].colTypeName = typeName == null ? EMPTY_STRING
289:                        : typeName;
290:            }
291:
292:            /**
293:             * {@inheritDoc}
294:             * 
295:             * @see java.sql.ResultSetMetaData#getColumnCount()
296:             */
297:            public int getColumnCount() throws SQLException {
298:                return colCount;
299:            }
300:
301:            /**
302:             * {@inheritDoc}
303:             * 
304:             * @see java.sql.ResultSetMetaData#isAutoIncrement(int)
305:             */
306:            public boolean isAutoIncrement(int columnIndex) throws SQLException {
307:                checkColumnIndex(columnIndex);
308:                return colInfo[columnIndex].autoIncrement;
309:            }
310:
311:            /**
312:             * {@inheritDoc}
313:             * 
314:             * @see java.sql.ResultSetMetaData#isCaseSensitive(int)
315:             */
316:            public boolean isCaseSensitive(int columnIndex) throws SQLException {
317:                checkColumnIndex(columnIndex);
318:                return colInfo[columnIndex].caseSensitive;
319:            }
320:
321:            /**
322:             * {@inheritDoc}
323:             * 
324:             * @see java.sql.ResultSetMetaData#isSearchable(int)
325:             */
326:            public boolean isSearchable(int columnIndex) throws SQLException {
327:                checkColumnIndex(columnIndex);
328:                return colInfo[columnIndex].searchable;
329:            }
330:
331:            /**
332:             * {@inheritDoc}
333:             * 
334:             * @see java.sql.ResultSetMetaData#isCurrency(int)
335:             */
336:            public boolean isCurrency(int columnIndex) throws SQLException {
337:                checkColumnIndex(columnIndex);
338:                return colInfo[columnIndex].currency;
339:            }
340:
341:            /**
342:             * {@inheritDoc}
343:             * 
344:             * @see java.sql.ResultSetMetaData#isNullable(int)
345:             */
346:            public int isNullable(int columnIndex) throws SQLException {
347:                checkColumnIndex(columnIndex);
348:                return colInfo[columnIndex].nullable;
349:            }
350:
351:            /**
352:             * {@inheritDoc}
353:             * 
354:             * @see java.sql.ResultSetMetaData#isSigned(int)
355:             */
356:            public boolean isSigned(int columnIndex) throws SQLException {
357:                checkColumnIndex(columnIndex);
358:                return colInfo[columnIndex].signed;
359:            }
360:
361:            /**
362:             * {@inheritDoc}
363:             * 
364:             * @see java.sql.ResultSetMetaData#getColumnDisplaySize(int)
365:             */
366:            public int getColumnDisplaySize(int columnIndex)
367:                    throws SQLException {
368:                checkColumnIndex(columnIndex);
369:                return colInfo[columnIndex].columnDisplaySize;
370:            }
371:
372:            /**
373:             * {@inheritDoc}
374:             * 
375:             * @see java.sql.ResultSetMetaData#getColumnLabel(int)
376:             */
377:            public String getColumnLabel(int columnIndex) throws SQLException {
378:                checkColumnIndex(columnIndex);
379:                return colInfo[columnIndex].columnLabel;
380:            }
381:
382:            /**
383:             * {@inheritDoc}
384:             * 
385:             * @see java.sql.ResultSetMetaData#getColumnName(int)
386:             */
387:            public String getColumnName(int columnIndex) throws SQLException {
388:                checkColumnIndex(columnIndex);
389:                return colInfo[columnIndex].columnName;
390:            }
391:
392:            /**
393:             * {@inheritDoc}
394:             * 
395:             * @see java.sql.ResultSetMetaData#getSchemaName(int)
396:             */
397:            public String getSchemaName(int columnIndex) throws SQLException {
398:                checkColumnIndex(columnIndex);
399:                return colInfo[columnIndex].schemaName;
400:            }
401:
402:            /**
403:             * {@inheritDoc}
404:             * 
405:             * @see java.sql.ResultSetMetaData#getPrecision(int)
406:             */
407:            public int getPrecision(int columnIndex) throws SQLException {
408:                checkColumnIndex(columnIndex);
409:                return colInfo[columnIndex].precision;
410:            }
411:
412:            /**
413:             * {@inheritDoc}
414:             * 
415:             * @see java.sql.ResultSetMetaData#getScale(int)
416:             */
417:            public int getScale(int columnIndex) throws SQLException {
418:                checkColumnIndex(columnIndex);
419:                return colInfo[columnIndex].scale;
420:            }
421:
422:            /**
423:             * {@inheritDoc}
424:             * 
425:             * @see java.sql.ResultSetMetaData#getTableName(int)
426:             */
427:            public String getTableName(int columnIndex) throws SQLException {
428:                checkColumnIndex(columnIndex);
429:                return colInfo[columnIndex].tableName;
430:            }
431:
432:            /**
433:             * {@inheritDoc}
434:             * 
435:             * @see java.sql.ResultSetMetaData#getCatalogName(int)
436:             */
437:            public String getCatalogName(int columnIndex) throws SQLException {
438:                checkColumnIndex(columnIndex);
439:                return colInfo[columnIndex].catalogName;
440:            }
441:
442:            /**
443:             * {@inheritDoc}
444:             * 
445:             * @see java.sql.ResultSetMetaData#getColumnType(int)
446:             */
447:            public int getColumnType(int columnIndex) throws SQLException {
448:                checkColumnIndex(columnIndex);
449:                return colInfo[columnIndex].colType;
450:            }
451:
452:            /**
453:             * {@inheritDoc}
454:             * 
455:             * @see java.sql.ResultSetMetaData#getColumnTypeName(int)
456:             */
457:            public String getColumnTypeName(int columnIndex)
458:                    throws SQLException {
459:                checkColumnIndex(columnIndex);
460:                return colInfo[columnIndex].colTypeName;
461:            }
462:
463:            /**
464:             * {@inheritDoc}
465:             * 
466:             * @see java.sql.ResultSetMetaData#isReadOnly(int)
467:             */
468:            public boolean isReadOnly(int columnIndex) throws SQLException {
469:                return !isWritable(columnIndex);
470:            }
471:
472:            /**
473:             * {@inheritDoc}
474:             * 
475:             * @see java.sql.ResultSetMetaData#isWritable(int)
476:             */
477:            public boolean isWritable(int columnIndex) throws SQLException {
478:                checkColumnIndex(columnIndex);
479:                return colInfo[columnIndex].writeable;
480:            }
481:
482:            /**
483:             * {@inheritDoc}
484:             * 
485:             * @see java.sql.ResultSetMetaData#isDefinitelyWritable(int)
486:             */
487:            public boolean isDefinitelyWritable(int columnIndex)
488:                    throws SQLException {
489:                checkColumnIndex(columnIndex);
490:                return colInfo[columnIndex].definiteWritable;
491:            }
492:
493:            /**
494:             * {@inheritDoc}
495:             * 
496:             * @see java.sql.ResultSetMetaData#getColumnClassName(int)
497:             */
498:            public String getColumnClassName(int columnIndex)
499:                    throws SQLException {
500:                return SqlUtil.getClassNameByType(getColumnType(columnIndex));
501:            }
502:
503:            /**
504:             * The inner class to store meta information of columns.
505:             */
506:            private class ColInfo implements  Serializable {
507:
508:                private static final long serialVersionUID = 5490834817919311283L;
509:
510:                public boolean autoIncrement;
511:
512:                public boolean caseSensitive;
513:
514:                public boolean currency;
515:
516:                public boolean signed;
517:
518:                public boolean searchable;
519:
520:                public boolean writeable = true;
521:
522:                public boolean definiteWritable = true;
523:
524:                public String columnLabel;
525:
526:                public String columnName;
527:
528:                public String schemaName = EMPTY_STRING;
529:
530:                public String colTypeName;
531:
532:                public int colType;
533:
534:                public int nullable;
535:
536:                public int columnDisplaySize;
537:
538:                public int precision;
539:
540:                public int scale;
541:
542:                public String tableName = EMPTY_STRING;
543:
544:                public String catalogName = EMPTY_STRING;
545:            }
546:        }
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