Handle date format strings in an iso8601 style format, with a T in them. Fixes bug #54034

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1597038 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/ss/usermodel/DataFormatter.java

 ==================================================================== */
 package org.apache.poi.ss.usermodel;
 
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
 import java.math.RoundingMode;
 import java.text.DateFormatSymbols;
 import java.text.DecimalFormat;
         formatStr = formatStr.replaceAll(";@", "");
         formatStr = formatStr.replaceAll("\"/\"", "/"); // "/" is escaped for no reason in: mm"/"dd"/"yyyy
         formatStr = formatStr.replace("\"\"", "'");	// replace Excel quoting with Java style quoting
+        formatStr = formatStr.replaceAll("\\\\T","'T'"); // Quote the T is iso8601 style dates
 
 
         boolean hasAmPm = false;

src/java/org/apache/poi/ss/usermodel/DateUtil.java

     private static final Pattern date_ptrn1 = Pattern.compile("^\\[\\$\\-.*?\\]");
     private static final Pattern date_ptrn2 = Pattern.compile("^\\[[a-zA-Z]+\\]");
     private static final Pattern date_ptrn3a = Pattern.compile("[yYmMdDhHsS]");
-    private static final Pattern date_ptrn3b = Pattern.compile("^[\\[\\]yYmMdDhHsS\\-/,. :\"\\\\]+0*[ampAMP/]*$");
+    private static final Pattern date_ptrn3b = Pattern.compile("^[\\[\\]yYmMdDhHsS\\-T/,. :\"\\\\]+0*[ampAMP/]*$");
     //  elapsed time patterns: [h],[m] and [s]
     private static final Pattern date_ptrn4 = Pattern.compile("^\\[([hH]+|[mM]+|[sS]+)\\]");
 
         }
         
         // If we get here, check it's only made up, in any case, of:
-        //  y m d h s - \ / , . : [ ]
+        //  y m d h s - \ / , . : [ ] T
         // optionally followed by AM/PM
 
         boolean result = date_ptrn3b.matcher(fs).matches();

src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFBugs.java

 package org.apache.poi.xssf.usermodel;
 
 import static org.hamcrest.core.IsEqual.equalTo;
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import org.apache.poi.ss.formula.eval.ErrorEval;
 import org.apache.poi.ss.formula.eval.ValueEval;
 import org.apache.poi.ss.formula.functions.Function;
-import org.apache.poi.ss.usermodel.*;
+import org.apache.poi.ss.usermodel.BaseTestBugzillaIssues;
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.CellStyle;
+import org.apache.poi.ss.usermodel.CellValue;
+import org.apache.poi.ss.usermodel.ClientAnchor;
+import org.apache.poi.ss.usermodel.Comment;
+import org.apache.poi.ss.usermodel.CreationHelper;
+import org.apache.poi.ss.usermodel.DataFormatter;
+import org.apache.poi.ss.usermodel.DateUtil;
+import org.apache.poi.ss.usermodel.Drawing;
+import org.apache.poi.ss.usermodel.Font;
+import org.apache.poi.ss.usermodel.FormulaError;
+import org.apache.poi.ss.usermodel.FormulaEvaluator;
+import org.apache.poi.ss.usermodel.IndexedColors;
+import org.apache.poi.ss.usermodel.Name;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.ss.usermodel.WorkbookFactory;
 import org.apache.poi.ss.util.AreaReference;
 import org.apache.poi.ss.util.CellRangeAddress;
 import org.apache.poi.ss.util.CellReference;
         
         assertThat(firstSave, equalTo(secondSave));
     }
+    
+    /**
+     * ISO-8601 style cell formats with a T in them, eg
+     * cell format of "yyyy-MM-ddTHH:mm:ss"
+     */
+    @Test
+    public void bug54034() throws IOException {
+        Workbook wb = XSSFTestDataSamples.openSampleWorkbook("54034.xlsx");
+        Sheet sheet = wb.getSheet("Sheet1");
+        Row row = sheet.getRow(1);
+        Cell cell = row.getCell(2);
+        assertTrue(DateUtil.isCellDateFormatted(cell));
+        
+        DataFormatter fmt = new DataFormatter();
+        assertEquals("yyyy\\-mm\\-dd\\Thh:mm", cell.getCellStyle().getDataFormatString());
+        assertEquals("2012-08-08T22:59", fmt.formatCellValue(cell));
+    }
 
 
     @Test