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This commit is contained in:
James Dunkerley 2024-08-29 15:10:44 +01:00
parent ecf82f3fb5
commit d1ac799131
2 changed files with 34 additions and 14 deletions
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46
std-bits/table/src/main/java/org/enso/table/excel/xssfreader/XSSFReaderSheetXMLHandler.java
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@ -168,25 +168,39 @@ public class XSSFReaderSheetXMLHandler extends DefaultHandler {
}
public record CellValue(XSSDataType dataType, String strValue, int formatIndex, String format) {
static final LocalDate EPOC_1900 = LocalDate.of(1899, 12, 31);
static final LocalDate EPOC_1900 = LocalDate.of(1899, 12, 30);
static final long MILLIS_PER_DAY = 24 * 60 * 60 * 1000;
static Temporal fromExcelDate(String text) {
var idx = text.indexOf('.');
// Get the date part
long date = Long.parseLong(idx == -1 ? text : text.substring(0, idx));
var adjustedEpoch = EPOC_1900.plusDays((date < 61 ? 1 : 0) + date);
// Get the date and time part part
long date;
double fraction;
if (idx == -1) {
return adjustedEpoch;
date = Long.parseLong(text);
fraction = 0;
} else {
var dbl = Double.parseDouble(text.substring(idx));
date = (long)Math.floor(dbl);
fraction = dbl - date;
}
// Excel treats 1900-02-29 as a valid date, which it isn't
if (date == 60) {
return null;
}
var localDate = date == 0 ? EPOC_1900 : EPOC_1900.plusDays((date < 61 ? 1 : 0) + date);
// Return as a LocalDate unless 0 then Midnight
if (fraction == 0) {
return date == 0 ? LocalTime.MIDNIGHT : localDate;
}
// Get the time part (fractional part)
var fraction = Double.parseDouble(text.substring(idx));
var millis = (long) (fraction * MILLIS_PER_DAY + 0.5);
var time = LocalTime.ofNanoOfDay(millis * 1_000_000);
return adjustedEpoch.atTime(time);
return date == 0 ? time : localDate.atTime(time);
}
public boolean getBooleanValue() {
@ -194,7 +208,13 @@ public class XSSFReaderSheetXMLHandler extends DefaultHandler {
}
public boolean isInteger() {
return strValue.indexOf('.') == -1;
for (int i = 0; i < strValue.length(); i++) {
var c = strValue.charAt(i);
if (c == '.' || c == 'E' || c == 'e') {
return false;
}
}
return false;
}
public long getLongValue() {
@ -213,11 +233,11 @@ public class XSSFReaderSheetXMLHandler extends DefaultHandler {
default -> {
if (resolveDates && DateUtil.isADateFormat(formatIndex, format)) {
var datetime = fromExcelDate(strValue());
yield datetime instanceof LocalDate
? datetime
: ((LocalDateTime) datetime).atZone(ZoneId.systemDefault());
yield datetime instanceof LocalDateTime
? ((LocalDateTime) datetime).atZone(ZoneId.systemDefault())
: datetime;
}
yield getNumberValue();
yield isInteger() ? getLongValue() : getNumberValue();
}
};
}

2
test/Table_Tests/src/IO/Excel_Spec.enso
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@ -1012,7 +1012,7 @@ add_specs suite_builder =
workbook.close . should_equal Nothing
workbook.read "Sheet1" . should_fail_with Illegal_State
ci_pending = if Environment.get "CI" != Nothing then "This test takes a lot of time so it is disabled on CI."
ci_pending = "This test takes a lot of time so it is disabled on CI."
group_builder.specify "should be able to write and read a big XLSX file (>110MB)" pending=ci_pending <|
n = 10^6
IO.println "Generating big XLSX file "+Time_Of_Day.now.to_text