Example usage for java.time DateTimeException DateTimeException

Introduction

In this page you can find the example usage for java.time DateTimeException DateTimeException.

Prototype

public DateTimeException(String message) 

Source Link

Document

Constructs a new date-time exception with the specified message.

Usage

From source file:org.talend.dataprep.transformation.actions.date.DateParser.java

/**
 * Guess the pattern from the given value.
 *
 * @param value the value to get the date time from.
 * @param column the column metadata//from   ww  w .ja  v a  2s .  c o  m
 * @return the wanted parsed date time. For date only value, time is set to 00:00:00.
 */
DatePattern guessPattern(String value, ColumnMetadata column) {
    if (StringUtils.isEmpty(value)) {
        throw new DateTimeException("No pattern can be found out of '" + value + "'");
    }
    // call DQ on the given value
    try (Analyzer<Analyzers.Result> analyzer = analyzerService.build(column,
            AnalyzerService.Analysis.PATTERNS)) {
        analyzer.analyze(value);
        analyzer.end();

        // only one value --> only one result
        final Analyzers.Result result = analyzer.getResult().get(0);
        if (result.exist(PatternFrequencyStatistics.class)) {
            final PatternFrequencyStatistics patternFrequencyStatistics = result
                    .get(PatternFrequencyStatistics.class);
            final Map<String, Long> topTerms = patternFrequencyStatistics.getTopK(1);
            List<PatternFrequency> patterns = new ArrayList<>(1);
            topTerms.forEach((s, o) -> patterns.add(new PatternFrequency(s, o)));

            // get & check the results
            final List<DatePattern> results = getPatterns(patterns);
            if (results.isEmpty()) {
                throw new DateTimeException("DQ did not find any pattern for '" + value + "'");
            }

            // as Christopher L. said : "there can be only one" :-)
            return getPatterns(patterns).get(0);
        } else {
            throw new DateTimeException("DQ did not find any pattern for '" + value + "'");
        }
    } catch (Exception e) {
        throw new DateTimeException("Unable to close analyzer after analyzing value '" + value + "'", e);
    }
}

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From source file:org.talend.dataprep.transformation.actions.date.DateParser.java

/**
 * Parse the date from the given patterns.
 *
 * @param value the text to parse.//from  w ww  . j a  v  a 2s  . c  o m
 * @param patterns the patterns to use.
 * @return the parsed date-time
 */
public LocalDateTime parseDateFromPatterns(String value, List<DatePattern> patterns) {

    // take care of the null value
    if (value == null) {
        throw new DateTimeException("cannot parse null");
    }

    for (DatePattern pattern : patterns) {
        final DateTimeFormatter formatter = new DateTimeFormatterBuilder().parseCaseInsensitive()
                .append(pattern.getFormatter()).toFormatter(Locale.ENGLISH);

        // first try to parse directly as LocalDateTime
        try {
            return LocalDateTime.parse(value, formatter);
        } catch (DateTimeException e) {
            LOGGER.trace("Unable to parse date '{}' using LocalDateTime.", value, e);
            // if it fails, let's try the LocalDate first
            try {
                LocalDate temp = LocalDate.parse(value, formatter);
                return temp.atStartOfDay();
            } catch (DateTimeException e2) {
                LOGGER.trace("Unable to parse date '{}' using LocalDate.", value, e2);
                // nothing to do here, just try the next formatter
            }
        }
    }
    throw new DateTimeException("'" + value + "' does not match any known pattern");
}

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