Source Code Cross Referenced for ValueConverter.java in  » Database-Client » SQL-Workbench » workbench » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database Client » SQL Workbench » workbench.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * ValueConverter.java
003:         *
004:         * This file is part of SQL Workbench/J, http://www.sql-workbench.net
005:         *
006:         * Copyright 2002-2008, Thomas Kellerer
007:         * No part of this code maybe reused without the permission of the author
008:         *
009:         * To contact the author please send an email to: support@sql-workbench.net
010:         *
011:         */
012:        package workbench.util;
013:
014:        import java.io.File;
015:        import java.math.BigDecimal;
016:        import java.sql.Types;
017:        import java.text.ParseException;
018:        import java.text.SimpleDateFormat;
019:        import java.util.Calendar;
020:        import java.util.Collection;
021:        import java.util.HashSet;
022:        import java.util.List;
023:        import workbench.log.LogMgr;
024:        import workbench.resource.Settings;
025:
026:        /**
027:         * Utility class to parse Strings into approriate Java classes according
028:         * to a type from java.sql.Types.
029:         *
030:         * @author  support@sql-workbench.net
031:         */
032:        public class ValueConverter {
033:            /**
034:             *	Often used date formats which are tried when parsing a Date
035:             *  or a TimeStamp column
036:             */
037:            private final String[] dateFormats = new String[] { "yyyy-MM-dd",
038:                    "dd.MM.yyyy", "dd.MM.yy", "MM/dd/yy", "MM/dd/yyyy",
039:                    "dd-MMM-yyyy", "yyyy-MM-dd HH:mm:ss.SS",
040:                    "yyyy-MM-dd HH:mm:ss", "dd.MM.yyyy HH:mm:ss",
041:                    "MM/dd/yy HH:mm:ss", "MM/dd/yyyy HH:mm:ss" };
042:
043:            private final String[] timestampFormats = new String[] {
044:                    "yyyy-MM-dd HH:mm:ss.SS", "yyyy-MM-dd HH:mm:ss",
045:                    "dd.MM.yyyy HH:mm:ss.SS", "dd.MM.yyyy HH:mm:ss",
046:                    "dd.MM.yy HH:mm:ss.SS", "dd.MM.yy HH:mm:ss",
047:                    "MM/dd/yyyy HH:mm:ss.SS", "MM/dd/yyyy HH:mm:ss",
048:                    "MM/dd/yy HH:mm:ss.SS", "MM/dd/yy HH:mm:ss", "yyyy-MM-dd",
049:                    "dd.MM.yyyy", "dd.MM.yy", "MM/dd/yy", "MM/dd/yyyy", };
050:
051:            private final String[] timeFormats = new String[] { "HH:mm:ss.SS",
052:                    "HH:mm:ss", "HH:mm" };
053:
054:            private String defaultDateFormat;
055:            private String defaultTimestampFormat;
056:            private char decimalCharacter = '.';
057:            private SimpleDateFormat dateFormatter;
058:            private SimpleDateFormat timestampFormatter;
059:            private SimpleDateFormat formatter = new SimpleDateFormat();
060:            private boolean autoConvertBooleanNumbers = true;
061:            private Collection<String> booleanTrueValues = null;
062:            private Collection<String> booleanFalseValues = null;
063:
064:            private final Integer INT_TRUE = Integer.valueOf(1);
065:            private final Integer INT_FALSE = Integer.valueOf(0);
066:            private final Long LONG_TRUE = Long.valueOf(1);
067:            private final Long LONG_FALSE = Long.valueOf(0);
068:            private final BigDecimal BIG_TRUE = BigDecimal.valueOf(1);
069:            private final BigDecimal BIG_FALSE = BigDecimal.valueOf(0);
070:
071:            private static final String FORMAT_MILLIS = "millis";
072:
073:            public ValueConverter() {
074:                Settings sett = Settings.getInstance();
075:                this .setDefaultDateFormat(sett.getDefaultDateFormat());
076:                this 
077:                        .setDefaultTimestampFormat(sett
078:                                .getDefaultTimestampFormat());
079:            }
080:
081:            public ValueConverter(String aDateFormat, String aTimeStampFormat) {
082:                if (StringUtil.isEmptyString(aDateFormat)) {
083:                    this .setDefaultDateFormat(Settings.getInstance()
084:                            .getDefaultDateFormat());
085:                } else {
086:                    this .setDefaultDateFormat(aDateFormat);
087:                }
088:
089:                if (StringUtil.isEmptyString(aTimeStampFormat)) {
090:                    this .setDefaultTimestampFormat(Settings.getInstance()
091:                            .getDefaultTimestampFormat());
092:                } else {
093:                    this .setDefaultTimestampFormat(aTimeStampFormat);
094:                }
095:            }
096:
097:            public void setDefaultDateFormat(String aFormat)
098:                    throws IllegalArgumentException {
099:                if (!StringUtil.isEmptyString(aFormat)) {
100:                    if (aFormat.equalsIgnoreCase(FORMAT_MILLIS)) {
101:                        this .defaultTimestampFormat = FORMAT_MILLIS;
102:                        this .dateFormatter = null;
103:                    } else {
104:                        this .defaultDateFormat = aFormat;
105:                        this .dateFormatter = new SimpleDateFormat(aFormat);
106:                    }
107:                }
108:            }
109:
110:            public void setDefaultTimestampFormat(String aFormat)
111:                    throws IllegalArgumentException {
112:                if (!StringUtil.isEmptyString(aFormat)) {
113:                    if (aFormat.equalsIgnoreCase(FORMAT_MILLIS)) {
114:                        this .defaultTimestampFormat = FORMAT_MILLIS;
115:                        this .dateFormatter = null;
116:                    } else {
117:                        this .defaultTimestampFormat = aFormat;
118:                        this .timestampFormatter = new SimpleDateFormat(aFormat);
119:                    }
120:                }
121:            }
122:
123:            public void setDecimalCharacter(char aChar) {
124:                this .decimalCharacter = aChar;
125:            }
126:
127:            public void setAutoConvertBooleanNumbers(boolean flag) {
128:                this .autoConvertBooleanNumbers = flag;
129:            }
130:
131:            /**
132:             * Define a list of literals that should be treated as true or
133:             * false when converting input values.
134:             * If either collection is null, both are considered null
135:             * If these values are not defined, the default boolean conversion implemented
136:             * in {@link workbench.util.StringUtil#stringToBool(String)} is used (this is the
137:             * default)
138:             * @param trueValues String literals to be considered as <tt>true</tt>
139:             * @param falseValues String literals to be considered as <tt>false</tt>
140:             */
141:            public void setBooleanLiterals(Collection<String> trueValues,
142:                    Collection<String> falseValues) {
143:                if (trueValues == null || falseValues == null
144:                        || trueValues.size() == 0 || falseValues.size() == 0) {
145:                    this .booleanFalseValues = null;
146:                    this .booleanTrueValues = null;
147:                } else {
148:                    this .booleanFalseValues = new HashSet<String>(falseValues);
149:                    this .booleanTrueValues = new HashSet<String>(trueValues);
150:                }
151:            }
152:
153:            private Number getNumberFromString(String value, boolean useInt) {
154:                if (value == null)
155:                    return null;
156:
157:                try {
158:                    BigDecimal d = new BigDecimal(this 
159:                            .adjustDecimalString(value));
160:                    if (useInt) {
161:                        return new Integer(d.intValueExact());
162:                    } else {
163:                        return new Long(d.longValueExact());
164:                    }
165:                } catch (Exception e) {
166:                    // Ignore
167:                }
168:                return null;
169:            }
170:
171:            private Number getLong(String value) throws ConverterException {
172:                if (value.length() == 0)
173:                    return null;
174:
175:                try {
176:                    return new Long(value);
177:                } catch (NumberFormatException e) {
178:                    // Maybe the long value is disguised as a decimal
179:                    Number n = getNumberFromString(value, false);
180:                    if (n != null) {
181:                        return n;
182:                    }
183:
184:                    // When exporting from a database that supports the boolean datatype
185:                    // into a database that maps this to an integer, we assume that
186:                    // true/false should be 1/0
187:                    if (autoConvertBooleanNumbers) {
188:                        Boolean b = getBoolean(value);
189:                        if (b != null) {
190:                            if (b.booleanValue()) {
191:                                return LONG_TRUE;
192:                            } else {
193:                                return LONG_FALSE;
194:                            }
195:                        }
196:                    }
197:
198:                    throw new ConverterException(value, Types.BIGINT, e);
199:                }
200:            }
201:
202:            private Number getInt(String value, int type)
203:                    throws ConverterException {
204:                if (value.length() == 0)
205:                    return null;
206:
207:                try {
208:                    return new Integer(value);
209:                } catch (NumberFormatException e) {
210:                    // Maybe the integer value is disguised as a decimal
211:                    Number n = getNumberFromString(value, true);
212:                    if (n != null)
213:                        return n;
214:
215:                    // When exporting from a database that supports the boolean datatype
216:                    // into a database that maps this to an integer, we assume that
217:                    // true/false should be 1/0
218:                    if (autoConvertBooleanNumbers) {
219:                        Boolean b = getBoolean(value);
220:                        if (b != null) {
221:                            if (b.booleanValue()) {
222:                                return INT_TRUE;
223:                            } else {
224:                                return INT_FALSE;
225:                            }
226:                        }
227:                    }
228:
229:                    throw new ConverterException(value, type, e);
230:                }
231:            }
232:
233:            private Number getBigDecimal(String value, int type)
234:                    throws ConverterException {
235:                if (value.length() == 0)
236:                    return null;
237:
238:                try {
239:                    return new BigDecimal(this .adjustDecimalString(value));
240:                } catch (NumberFormatException e) {
241:                    // When exporting from a database that supports the boolean datatype
242:                    // into a database that maps this to an integer, we assume that
243:                    // true/false should be 1/0
244:                    if (autoConvertBooleanNumbers) {
245:                        Boolean b = getBoolean(value);
246:                        if (b != null) {
247:                            if (b.booleanValue()) {
248:                                return BIG_TRUE;
249:                            } else {
250:                                return BIG_FALSE;
251:                            }
252:                        }
253:                    }
254:                    throw new ConverterException(value, type, e);
255:                }
256:            }
257:
258:            /**
259:             * Convert the given input value to a class instance
260:             * according to the given type (from java.sql.Types)
261:             * If the value is a blob file parameter as defined by {@link workbench.util.LobFileParameter}
262:             * then a File object is returned that points to the data file (as passed in the
263:             * blob file parameter)
264:             * @see workbench.storage.DataStore#convertCellValue(Object, int)
265:             */
266:            public Object convertValue(Object aValue, int type)
267:                    throws ConverterException {
268:                if (aValue == null) {
269:                    return null;
270:                }
271:
272:                String v = aValue.toString().trim();
273:
274:                switch (type) {
275:                case Types.BIGINT:
276:                    return getLong(v);
277:
278:                case Types.INTEGER:
279:                case Types.SMALLINT:
280:                case Types.TINYINT:
281:                    return getInt(v, type);
282:
283:                case Types.NUMERIC:
284:                case Types.DECIMAL:
285:                case Types.DOUBLE:
286:                case Types.REAL:
287:                case Types.FLOAT:
288:                    return getBigDecimal(v, type);
289:
290:                case Types.CHAR:
291:                case Types.VARCHAR:
292:                case Types.LONGVARCHAR:
293:                    return aValue.toString();
294:
295:                case Types.DATE:
296:                    if (v.length() == 0)
297:                        return null;
298:
299:                    try {
300:                        return this .parseDate((String) aValue);
301:                    } catch (Exception e) {
302:                        throw new ConverterException(aValue, type, e);
303:                    }
304:
305:                case Types.TIMESTAMP:
306:                    if (v.length() == 0)
307:                        return null;
308:                    try {
309:                        return this .parseTimestamp((String) aValue);
310:                    } catch (Exception e) {
311:                        throw new ConverterException(aValue, type, e);
312:                    }
313:
314:                case Types.TIME:
315:                    if (v.length() == 0)
316:                        return null;
317:
318:                    try {
319:                        return this .parseTime((String) aValue);
320:                    } catch (Exception e) {
321:                        throw new ConverterException(aValue, type, e);
322:                    }
323:
324:                case Types.BLOB:
325:                case Types.BINARY:
326:                case Types.LONGVARBINARY:
327:                case Types.VARBINARY:
328:                    if (aValue instanceof  String) {
329:                        LobFileParameterParser p = null;
330:                        try {
331:                            p = new LobFileParameterParser(aValue.toString());
332:                        } catch (Exception e) {
333:                            throw new ConverterException(aValue, type, e);
334:                        }
335:                        LobFileParameter[] parms = p.getParameters();
336:                        if (parms == null)
337:                            return null;
338:                        String fname = parms[0].getFilename();
339:                        if (fname == null)
340:                            return null;
341:                        return new File(fname);
342:                    } else if (aValue instanceof  File) {
343:                        return aValue;
344:                    } else if (aValue instanceof  byte[]) {
345:                        return aValue;
346:                    }
347:                    return null;
348:
349:                case Types.BIT:
350:                case Types.BOOLEAN:
351:                    return convertBool(v, type);
352:
353:                default:
354:                    return aValue;
355:                }
356:            }
357:
358:            public String getDatePattern() {
359:                return this .defaultDateFormat;
360:            }
361:
362:            public String getTimestampPattern() {
363:                return this .defaultTimestampFormat;
364:            }
365:
366:            public java.sql.Time parseTime(String time) throws ParseException {
367:                if (isCurrentTime(time)) {
368:                    Calendar c = Calendar.getInstance();
369:                    c.clear(Calendar.YEAR);
370:                    c.clear(Calendar.DAY_OF_MONTH);
371:                    c.clear(Calendar.MONTH);
372:                    java.util.Date now = c.getTime();
373:                    return new java.sql.Time(now.getTime());
374:                }
375:
376:                java.util.Date parsed = null;
377:
378:                synchronized (this .formatter) {
379:                    for (int i = 0; i < timeFormats.length; i++) {
380:                        try {
381:                            this .formatter.applyPattern(timeFormats[i]);
382:                            parsed = this .formatter.parse(time);
383:                            LogMgr.logInfo("ValueConverter.parseTime()",
384:                                    "Succeeded parsing the time string ["
385:                                            + time + "] using the format: "
386:                                            + formatter.toPattern());
387:                            break;
388:                        } catch (Exception e) {
389:                            parsed = null;
390:                        }
391:                    }
392:                }
393:
394:                if (parsed != null) {
395:                    return new java.sql.Time(parsed.getTime());
396:                }
397:                throw new ParseException("Could not parse [" + time
398:                        + "] as a time value!", 0);
399:            }
400:
401:            private java.sql.Date getToday() {
402:                Calendar c = Calendar.getInstance();
403:                c.set(Calendar.HOUR_OF_DAY, 0);
404:                c.set(Calendar.HOUR, 0);
405:                c.clear(Calendar.MINUTE);
406:                c.clear(Calendar.SECOND);
407:                c.clear(Calendar.MILLISECOND);
408:                java.util.Date now = c.getTime();
409:                return new java.sql.Date(now.getTime());
410:            }
411:
412:            public java.sql.Timestamp parseTimestamp(String aDate)
413:                    throws ParseException, NumberFormatException {
414:                if (isCurrentTimestamp(aDate)) {
415:                    java.sql.Timestamp ts = new java.sql.Timestamp(System
416:                            .currentTimeMillis());
417:                    return ts;
418:                }
419:
420:                if (isCurrentDate(aDate)) {
421:                    return new java.sql.Timestamp(getToday().getTime());
422:                }
423:
424:                java.util.Date result = null;
425:
426:                if (this .defaultTimestampFormat != null) {
427:                    try {
428:                        if (FORMAT_MILLIS
429:                                .equalsIgnoreCase(defaultTimestampFormat)) {
430:                            long value = Long.parseLong(aDate);
431:                            result = new java.util.Date(value);
432:                        } else {
433:                            synchronized (this .timestampFormatter) {
434:                                result = this .timestampFormatter.parse(aDate);
435:                            }
436:                        }
437:                    } catch (Exception e) {
438:                        LogMgr
439:                                .logWarning(
440:                                        "ValueConverter.parseTimestamp()",
441:                                        "Could not parse '"
442:                                                + aDate
443:                                                + "' using default format "
444:                                                + this .timestampFormatter
445:                                                        .toPattern()
446:                                                + ". Trying to recognize the format...",
447:                                        null);
448:                        result = null;
449:                    }
450:                }
451:
452:                if (result == null) {
453:                    int usedPattern = -1;
454:                    synchronized (this .formatter) {
455:                        for (int i = 0; i < dateFormats.length; i++) {
456:                            try {
457:                                this .formatter
458:                                        .applyPattern(timestampFormats[i]);
459:                                result = this .formatter.parse(aDate);
460:                                usedPattern = i;
461:                                break;
462:                            } catch (ParseException e) {
463:                                result = null;
464:                            }
465:                        }
466:                    }
467:                    if (usedPattern > -1) {
468:                        LogMgr.logInfo("ValueConverter.parseTimestamp()",
469:                                "Succeeded parsing '" + aDate
470:                                        + "' using the format: "
471:                                        + timestampFormats[usedPattern]);
472:                    }
473:                }
474:
475:                if (result != null) {
476:                    return new java.sql.Timestamp(result.getTime());
477:                }
478:                throw new ParseException("Could not convert [" + aDate
479:                        + "] to a timestamp value!", 0);
480:            }
481:
482:            public java.sql.Date parseDate(String aDate) throws ParseException {
483:                if (isCurrentDate(aDate)) {
484:                    return getToday();
485:                }
486:
487:                if (isCurrentTimestamp(aDate)) {
488:                    return new java.sql.Date(System.currentTimeMillis());
489:                }
490:
491:                java.util.Date result = null;
492:
493:                if (this .defaultDateFormat != null) {
494:                    try {
495:                        if (FORMAT_MILLIS
496:                                .equalsIgnoreCase(defaultTimestampFormat)) {
497:                            long value = Long.parseLong(aDate);
498:                            result = new java.util.Date(value);
499:                        } else {
500:                            synchronized (this .dateFormatter) {
501:                                result = this .dateFormatter.parse(aDate);
502:                            }
503:                        }
504:                    } catch (Exception e) {
505:                        LogMgr.logWarning("ValueConverter.parseDate()",
506:                                "Could not parse [" + aDate + "] using: "
507:                                        + this .dateFormatter.toPattern(), null);
508:                        // Do not throw the exception yet as we will try the defaultTimestampFormat as well.
509:                        result = null;
510:                    }
511:                }
512:
513:                if (result == null && this .defaultTimestampFormat != null) {
514:                    try {
515:                        result = this .timestampFormatter.parse(aDate);
516:                    } catch (ParseException e) {
517:                        LogMgr
518:                                .logWarning(
519:                                        "ValueConverter.parseDate()",
520:                                        "Could not parse ["
521:                                                + aDate
522:                                                + "] using: "
523:                                                + this .timestampFormatter
524:                                                        .toPattern()
525:                                                + ". Trying to recognize the format...",
526:                                        null);
527:                    }
528:                }
529:
530:                if (result == null) {
531:                    synchronized (this .formatter) {
532:                        for (int i = 0; i < dateFormats.length; i++) {
533:                            try {
534:                                this .formatter.applyPattern(dateFormats[i]);
535:                                result = this .formatter.parse(aDate);
536:                                LogMgr.logInfo("ValueConverter.parseDate()",
537:                                        "Succeeded parsing [" + aDate
538:                                                + "] using the format: "
539:                                                + dateFormats[i]);
540:                                break;
541:                            } catch (Exception e) {
542:                                result = null;
543:                            }
544:                        }
545:                    }
546:                }
547:
548:                if (result != null) {
549:                    return new java.sql.Date(result.getTime());
550:                }
551:
552:                throw new ParseException("Could not convert [" + aDate
553:                        + "] to a date", 0);
554:            }
555:
556:            private boolean isCurrentTime(String arg) {
557:                return isKeyword("current_time", arg);
558:            }
559:
560:            private boolean isCurrentDate(String arg) {
561:                return isKeyword("current_date", arg);
562:            }
563:
564:            private boolean isCurrentTimestamp(String arg) {
565:                return isKeyword("current_timestamp", arg);
566:            }
567:
568:            private boolean isKeyword(String type, String arg) {
569:                if (StringUtil.isEmptyString(arg)) {
570:                    return false;
571:                }
572:
573:                List<String> keywords = Settings.getInstance().getListProperty(
574:                        "workbench.db.keyword." + type, true);
575:                return keywords.contains(arg.toLowerCase());
576:            }
577:
578:            private String adjustDecimalString(String input) {
579:                if (input == null) {
580:                    return input;
581:                }
582:                String value = input.trim();
583:                int len = value.length();
584:                if (len == 0) {
585:                    return value;
586:                }
587:                StringBuilder result = new StringBuilder(len);
588:                int pos = value.lastIndexOf(this .decimalCharacter);
589:                for (int i = 0; i < len; i++) {
590:                    char c = value.charAt(i);
591:                    if (i == pos) {
592:                        // replace the decimal char with a . as that is required by BigDecimal(String)
593:                        // this way we only leave the last decimal character
594:                        result.append('.');
595:                    }
596:                    // filter out everything but valid number characters
597:                    else if ("+-0123456789eE".indexOf(c) > -1) {
598:                        result.append(c);
599:                    }
600:                }
601:
602:                return result.toString();
603:            }
604:
605:            private Boolean getBoolean(String value) throws ConverterException {
606:                if (this .booleanFalseValues != null
607:                        && this .booleanTrueValues != null) {
608:                    if (booleanFalseValues.contains(value)) {
609:                        return Boolean.FALSE;
610:                    }
611:                    if (booleanTrueValues.contains(value)) {
612:                        return Boolean.TRUE;
613:                    }
614:                    throw new ConverterException(
615:                            "Input value ["
616:                                    + value
617:                                    + "] not in the list of defined true or false literals");
618:                } else {
619:                    if ("false".equalsIgnoreCase(value)) {
620:                        return Boolean.FALSE;
621:                    }
622:                    if ("true".equalsIgnoreCase(value)) {
623:                        return Boolean.TRUE;
624:                    }
625:                }
626:                return null;
627:            }
628:
629:            private Boolean convertBool(String value, int type)
630:                    throws ConverterException {
631:                Boolean b = getBoolean(value);
632:                if (b != null) {
633:                    return b;
634:                }
635:
636:                throw new ConverterException(value, type, null);
637:            }
638:        }
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