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Fix bug #52349 - Correctly support excel style date format strings in the TEXT function

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1221123 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2011-12-20 06:58:01 +00:00
parent 6b0bce44a5
commit 09f6464163
3 changed files with 42 additions and 25 deletions
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1
src/documentation/content/xdocs/status.xml
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@ -34,6 +34,7 @@
<changes>
<release version="3.8-beta6" date="2012-??-??">
<action dev="poi-developers" type="fix">52349 - Correctly support excel style date format strings in the TEXT function</action>
<action dev="poi-developers" type="fix">52369 - XSSFExcelExtractor should format numeric cells based on the format strings applied to them</action>
<action dev="poi-developers" type="fix">52369 - Event based XSSF parsing should handle formatting of formula values in XSSFSheetXMLHandler</action>
<action dev="poi-developers" type="fix">52348 - Avoid exception when creating cell style in a workbook that has an empty xf table</action>

19
src/java/org/apache/poi/ss/formula/functions/TextFunction.java
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@ -30,6 +30,7 @@ import org.apache.poi.ss.formula.eval.NumberEval;
import org.apache.poi.ss.formula.eval.OperandResolver;
import org.apache.poi.ss.formula.eval.StringEval;
import org.apache.poi.ss.formula.eval.ValueEval;
import org.apache.poi.ss.usermodel.DataFormatter;
/**
* @author Amol S. Deshmukh &lt; amolweb at ya hoo dot com &gt;
@ -37,7 +38,7 @@ import org.apache.poi.ss.formula.eval.ValueEval;
* @author Stephen Wolke (smwolke at geistig.com)
*/
public abstract class TextFunction implements Function {
protected static final DataFormatter formatter = new DataFormatter();
protected static final String EMPTY_STRING = "";
protected static final String evaluateStringArg(ValueEval eval, int srcRow, int srcCol) throws EvaluationException {
@ -281,8 +282,11 @@ public abstract class TextFunction implements Function {
* TEXT returns a number value formatted with the given
* number formatting string. This function is not a complete implementation of
* the Excel function. This function implements decimal formatting
* with the Java class DecimalFormat. For date formatting this function uses
* the SimpleDateFormat class.<p/>
* with the Java class DecimalFormat. For date formatting, this function uses
* {@link DataFormatter}, which attempts to replicate the Excel date
* format string.
*
* TODO Merge much of this logic with {@link DataFormatter}
*
* <b>Syntax<b>:<br/> <b>TEXT</b>(<b>value</b>, <b>format_text</b>)<br/>
*
@ -343,12 +347,9 @@ public abstract class TextFunction implements Function {
}
} else {
try {
DateFormat dateFormatter = new SimpleDateFormat(s1);
Calendar cal = new GregorianCalendar(1899, 11, 30, 0, 0, 0);
cal.add(Calendar.DATE, (int)Math.floor(s0));
double dayFraction = s0 - Math.floor(s0);
cal.add(Calendar.MILLISECOND, (int) Math.round(dayFraction * 24 * 60 * 60 * 1000));
return new StringEval(dateFormatter.format(cal.getTime()));
// Ask DataFormatter to handle the Date string for us
String formattedDate = formatter.formatRawCellContents(s0, -1, s1);
return new StringEval(formattedDate);
} catch (Exception e) {
return ErrorEval.VALUE_INVALID;
}

17
src/testcases/org/apache/poi/ss/formula/functions/TestText.java
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@ -93,7 +93,7 @@ public final class TestText extends TestCase {
}
public void testTextWithDateFormatSecondArg() {
// Test with Java style M=Month
ValueEval numArg = new NumberEval(321.321);
ValueEval formatArg = new StringEval("dd:MM:yyyy hh:mm:ss");
ValueEval[] args = { numArg, formatArg };
@ -101,13 +101,28 @@ public final class TestText extends TestCase {
ValueEval testResult = new StringEval("16:11:1900 07:42:14");
assertEquals(testResult.toString(), result.toString());
// Excel also supports "m before h is month"
formatArg = new StringEval("dd:mm:yyyy hh:mm:ss");
args[1] = formatArg;
result = T.TEXT.evaluate(args, -1, (short)-1);
testResult = new StringEval("16:11:1900 07:42:14");
assertEquals(testResult.toString(), result.toString());
// this line is intended to compute how "November" would look like in the current locale
String november = new SimpleDateFormat("MMMM").format(new GregorianCalendar(2010,10,15).getTime());
// Again with Java style
formatArg = new StringEval("MMMM dd, yyyy");
args[1] = formatArg;
result = T.TEXT.evaluate(args, -1, (short)-1);
testResult = new StringEval(november + " 16, 1900");
assertEquals(testResult.toString(), result.toString());
// And Excel style
formatArg = new StringEval("mmmm dd, yyyy");
args[1] = formatArg;
result = T.TEXT.evaluate(args, -1, (short)-1);
testResult = new StringEval(november + " 16, 1900");
assertEquals(testResult.toString(), result.toString());
}
}