61060 - teach DataFormatter about conditional formatting rules with number formats

Currently only implemented for XSSF, as there is no API available for HSSF conditional formatting rule number formats (if it is even in the files).

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1794084 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/usermodel/HSSFConditionalFormattingRule.java

@@ -33,6 +33,7 @@ import org.apache.poi.ss.usermodel.ConditionFilterData;
 import org.apache.poi.ss.usermodel.ConditionFilterType;
 import org.apache.poi.ss.usermodel.ConditionType;
 import org.apache.poi.ss.usermodel.ConditionalFormattingRule;
+import org.apache.poi.ss.usermodel.ExcelNumberFormat;
 
 /**
  *
@@ -91,6 +92,14 @@ public final class HSSFConditionalFormattingRule implements ConditionalFormattin
         }
         return (CFRule12Record)cfRuleRecord;
     }
+    
+    /**
+     * Always null for HSSF records, until someone figures out where to find it
+     * @see org.apache.poi.ss.usermodel.ConditionalFormattingRule#getNumberFormat()
+     */
+    public ExcelNumberFormat getNumberFormat() {
+        return null;
+    }
 
     private HSSFFontFormatting getFontFormatting(boolean create) {
         FontFormatting fontFormatting = cfRuleRecord.getFontFormatting();

src/java/org/apache/poi/ss/formula/EvaluationConditionalFormatRule.java

@@ -41,6 +41,7 @@ import org.apache.poi.ss.usermodel.ConditionFilterType;
 import org.apache.poi.ss.usermodel.ConditionType;
 import org.apache.poi.ss.usermodel.ConditionalFormatting;
 import org.apache.poi.ss.usermodel.ConditionalFormattingRule;
+import org.apache.poi.ss.usermodel.ExcelNumberFormat;
 import org.apache.poi.ss.usermodel.Row;
 import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.util.CellRangeAddress;
@@ -60,6 +61,9 @@ import org.apache.poi.ss.util.CellRangeAddress;
  * create whatever style objects they need, caching those at the application level.
  * Thus this class only caches values needed for evaluation, not display.
  */
+/**
+ *
+ */
 public class EvaluationConditionalFormatRule implements Comparable<EvaluationConditionalFormatRule> {
 
     private final WorkbookEvaluator workbookEvaluator;
@@ -82,6 +86,8 @@ public class EvaluationConditionalFormatRule implements Comparable<EvaluationCon
     private final String formula2;
     private final OperatorEnum operator;
     private final ConditionType type;
+    // cached for performance, to avoid reading the XMLBean every time a conditinally formatted cell is rendered
+    private final ExcelNumberFormat numberFormat;
     
     /**
      *
@@ -108,11 +114,15 @@ public class EvaluationConditionalFormatRule implements Comparable<EvaluationCon
         this.regions = regions;
         formula1 = rule.getFormula1();
         formula2 = rule.getFormula2();
+        numberFormat = rule.getNumberFormat();
         
         operator = OperatorEnum.values()[rule.getComparisonOperation()];
         type = rule.getConditionType();
     }
 
+    /**
+     * @return sheet
+     */
     public Sheet getSheet() {
         return sheet;
     }
@@ -124,10 +134,20 @@ public class EvaluationConditionalFormatRule implements Comparable<EvaluationCon
         return formatting;
     }
     
+    /**
+     * @return conditional formatting index
+     */
     public int getFormattingIndex() {
         return formattingIndex;
     }
     
+    /**
+     * @return Excel number format string to apply to matching cells, or null to keep the cell default
+     */
+    public ExcelNumberFormat getNumberFormat() {
+        return numberFormat;
+    }
+    
     /**
      * @return the rule
      */
@@ -135,6 +155,9 @@ public class EvaluationConditionalFormatRule implements Comparable<EvaluationCon
         return rule;
     }
     
+    /**
+     * @return rule index
+     */
     public int getRuleIndex() {
         return ruleIndex;
     }

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

@@ -77,6 +77,12 @@ public interface ConditionalFormattingRule {
      */
     ColorScaleFormatting getColorScaleFormatting();
     
+    /**
+     *
+     * @return number format defined for this rule, or null if the cell default should be used
+     */
+    ExcelNumberFormat getNumberFormat();
+    
     /**
      * Type of conditional formatting rule.
      *

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

@@ -43,6 +43,7 @@ import java.util.regex.Pattern;
 
 import org.apache.poi.ss.format.CellFormat;
 import org.apache.poi.ss.format.CellFormatResult;
+import org.apache.poi.ss.formula.ConditionalFormattingEvaluator;
 import org.apache.poi.ss.util.DateFormatConverter;
 import org.apache.poi.ss.util.NumberToTextConverter;
 import org.apache.poi.util.LocaleUtil;
@@ -292,12 +293,20 @@ public class DataFormatter implements Observer {
      * @return A Format for the format String
      */
     private Format getFormat(Cell cell) {
-        if ( cell.getCellStyle() == null) {
+        return getFormat(cell, null);
+    }
+    
+    private Format getFormat(Cell cell, ConditionalFormattingEvaluator cfEvaluator) {
+        if (cell == null) return null;
+        
+        ExcelNumberFormat numFmt = ExcelNumberFormat.from(cell, cfEvaluator);
+        
+        if ( numFmt == null) {
             return null;
         }
 
-        int formatIndex = cell.getCellStyle().getDataFormat();
-        String formatStr = cell.getCellStyle().getDataFormatString();
+        int formatIndex = numFmt.getIdx();
+        String formatStr = numFmt.getFormat();
         if(formatStr == null || formatStr.trim().length() == 0) {
             return null;
         }
@@ -748,12 +757,17 @@ public class DataFormatter implements Observer {
      * Returns the formatted value of an Excel date as a <tt>String</tt> based
      * on the cell's <code>DataFormat</code>. i.e. "Thursday, January 02, 2003"
      * , "01/02/2003" , "02-Jan" , etc.
+     * <p/>
+     * If any conditional format rules apply, the highest priority with a number format is used.
+     * If no rules contain a number format, or no rules apply, the cell's style format is used.
+     * If the style does not have a format, the default date format is applied.
      *
-     * @param cell The cell
-     * @return a formatted date string
+     * @param cell
+     * @param cfEvaluator ConditionalFormattingEvaluator (if available)
+     * @return
      */
-    private String getFormattedDateString(Cell cell) {
-        Format dateFormat = getFormat(cell);
+    private String getFormattedDateString(Cell cell, ConditionalFormattingEvaluator cfEvaluator) {
+        Format dateFormat = getFormat(cell, cfEvaluator);
         if(dateFormat instanceof ExcelStyleDateFormatter) {
            // Hint about the raw excel value
            ((ExcelStyleDateFormatter)dateFormat).setDateToBeFormatted(
@@ -769,13 +783,17 @@ public class DataFormatter implements Observer {
      * based on the cell's <code>DataFormat</code>. Supported formats include
      * currency, percents, decimals, phone number, SSN, etc.:
      * "61.54%", "$100.00", "(800) 555-1234".
-     *
+     * <p/>
+     * Format comes from either the highest priority conditional format rule with a
+     * specified format, or from the cell style.
+     * 
      * @param cell The cell
+     * @param cfEvaluator if available, or null
      * @return a formatted number string
      */
-    private String getFormattedNumberString(Cell cell) {
+    private String getFormattedNumberString(Cell cell, ConditionalFormattingEvaluator cfEvaluator) {
 
-        Format numberFormat = getFormat(cell);
+        Format numberFormat = getFormat(cell, cfEvaluator);
         double d = cell.getNumericCellValue();
         if (numberFormat == null) {
             return String.valueOf(d);
@@ -863,7 +881,7 @@ public class DataFormatter implements Observer {
     /**
      * <p>
      * Returns the formatted value of a cell as a <tt>String</tt> regardless
-     * of the cell type. If the Excel format pattern cannot be parsed then the
+     * of the cell type. If the Excel number format pattern cannot be parsed then the
      * cell value will be formatted using a default format.
      * </p>
      * <p>When passed a null or blank cell, this method will return an empty
@@ -878,6 +896,37 @@ public class DataFormatter implements Observer {
      * @return a string value of the cell
      */
     public String formatCellValue(Cell cell, FormulaEvaluator evaluator) {
+        return formatCellValue(cell, evaluator, null);
+    }
+    
+    /**
+     * <p>
+     * Returns the formatted value of a cell as a <tt>String</tt> regardless
+     * of the cell type. If the Excel number format pattern cannot be parsed then the
+     * cell value will be formatted using a default format.
+     * </p>
+     * <p>When passed a null or blank cell, this method will return an empty
+     * String (""). Formula cells will be evaluated using the given
+     * {@link FormulaEvaluator} if the evaluator is non-null. If the
+     * evaluator is null, then the formula String will be returned. The caller
+     * is responsible for setting the currentRow on the evaluator
+     *</p>
+     * <p>
+     * When a ConditionalFormattingEvaluator is present, it is checked first to see
+     * if there is a number format to apply.  If multiple rules apply, the last one is used.
+     * If no ConditionalFormattingEvaluator is present, no rules apply, or the applied
+     * rules do not define a format, the cell's style format is used.
+     * </p>
+     * <p>
+     * The two evaluators should be from the same context, to avoid inconsistencies in cached values.
+     *</p>
+     *
+     * @param cell The cell (can be null)
+     * @param evaluator The FormulaEvaluator (can be null)
+     * @param cfEvaluator ConditionalFormattingEvaluator (can be null)
+     * @return a string value of the cell
+     */
+    public String formatCellValue(Cell cell, FormulaEvaluator evaluator, ConditionalFormattingEvaluator cfEvaluator) {
         localeChangedObservable.checkForLocaleChange();
         
         if (cell == null) {
@@ -894,10 +943,10 @@ public class DataFormatter implements Observer {
         switch (cellType) {
             case NUMERIC :
 
-                if (DateUtil.isCellDateFormatted(cell)) {
-                    return getFormattedDateString(cell);
+                if (DateUtil.isCellDateFormatted(cell, cfEvaluator)) {
+                    return getFormattedDateString(cell, cfEvaluator);
                 }
-                return getFormattedNumberString(cell);
+                return getFormattedNumberString(cell, cfEvaluator);
 
             case STRING :
                 return cell.getRichStringCellValue().getString();

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

@@ -19,10 +19,14 @@
 package org.apache.poi.ss.usermodel;
 
 import java.util.Calendar;
+import java.util.Collections;
 import java.util.Date;
+import java.util.List;
 import java.util.TimeZone;
 import java.util.regex.Pattern;
 
+import org.apache.poi.ss.formula.ConditionalFormattingEvaluator;
+import org.apache.poi.ss.formula.EvaluationConditionalFormatRule;
 import org.apache.poi.util.LocaleUtil;
 
 /**
@@ -347,6 +351,26 @@ public class DateUtil {
         lastCachedResult.set(Boolean.valueOf(cached));
     }
 
+    /**
+     * Given a format ID and its format String, will check to see if the
+     *  format represents a date format or not.
+     * Firstly, it will check to see if the format ID corresponds to an
+     *  internal excel date format (eg most US date formats)
+     * If not, it will check to see if the format string only contains
+     *  date formatting characters (ymd-/), which covers most
+     *  non US date formats.
+     *
+     * @param numFmt The number format index and string expression, or null if not specified
+     * @return true if it is a valid date format, false if not or null
+     * @see #isInternalDateFormat(int)
+     */
+    public static boolean isADateFormat(ExcelNumberFormat numFmt) {
+        
+        if (numFmt == null) return false;
+        
+        return isADateFormat(numFmt.getIdx(), numFmt.getFormat());
+    }
+        
     /**
      * Given a format ID and its format String, will check to see if the
      *  format represents a date format or not.
@@ -358,10 +382,11 @@ public class DateUtil {
      *
      * @param formatIndex The index of the format, eg from ExtendedFormatRecord.getFormatIndex
      * @param formatString The format string, eg from FormatRecord.getFormatString
+     * @return true if it is a valid date format, false if not or null
      * @see #isInternalDateFormat(int)
      */
-
     public static boolean isADateFormat(int formatIndex, String formatString) {
+        
         // First up, is this an internal date format?
         if(isInternalDateFormat(formatIndex)) {
             cache(formatString, formatIndex, true);
@@ -492,23 +517,40 @@ public class DateUtil {
      *  Check if a cell contains a date
      *  Since dates are stored internally in Excel as double values
      *  we infer it is a date if it is formatted as such.
+     * @param cell 
+     * @return true if it looks like a date
      *  @see #isADateFormat(int, String)
      *  @see #isInternalDateFormat(int)
      */
     public static boolean isCellDateFormatted(Cell cell) {
+        return isCellDateFormatted(cell, null);
+    }
+    
+    /**
+     *  Check if a cell contains a date
+     *  Since dates are stored internally in Excel as double values
+     *  we infer it is a date if it is formatted as such.
+     *  Format is determined from applicable conditional formatting, if
+     *  any, or cell style.
+     * @param cell 
+     * @param cfEvaluator if available, or null
+     * @return true if it looks like a date
+     *  @see #isADateFormat(int, String)
+     *  @see #isInternalDateFormat(int)
+     */
+    public static boolean isCellDateFormatted(Cell cell, ConditionalFormattingEvaluator cfEvaluator) {
         if (cell == null) return false;
         boolean bDate = false;
 
         double d = cell.getNumericCellValue();
         if ( DateUtil.isValidExcelDate(d) ) {
-            CellStyle style = cell.getCellStyle();
-            if(style==null) return false;
-            int i = style.getDataFormat();
-            String f = style.getDataFormatString();
-            bDate = isADateFormat(i, f);
+            ExcelNumberFormat nf = ExcelNumberFormat.from(cell, cfEvaluator);
+            if(nf==null) return false;
+            bDate = isADateFormat(nf);
         }
         return bDate;
     }
+    
     /**
      *  Check if a cell contains a date, checking only for internal
      *   excel date formats.

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

@@ -0,0 +1,78 @@
+package org.apache.poi.ss.usermodel;
+
+import java.util.List;
+
+import org.apache.poi.ss.formula.ConditionalFormattingEvaluator;
+import org.apache.poi.ss.formula.EvaluationConditionalFormatRule;
+
+/**
+ * Object to hold a number format index and string, for various formatting evaluations
+ */
+public class ExcelNumberFormat {
+
+    private final int idx;
+    private final String format;
+    
+    /**
+     * @param style
+     * @return null if the style is null, instance from style data format values otherwise
+     */
+    public static ExcelNumberFormat from(CellStyle style) {
+        if (style == null) return null;
+        return new ExcelNumberFormat(style.getDataFormat(), style.getDataFormatString());
+    }
+    
+    /**
+    * @param cell cell to extract format from
+    * @param cfEvaluator ConditionalFormattingEvaluator to use, or null if none in this context
+    * @return number format from highest-priority rule with a number format, or the cell style, or null if none of the above apply/are defined
+    */
+   public static ExcelNumberFormat from(Cell cell, ConditionalFormattingEvaluator cfEvaluator) {
+       if (cell == null) return null;
+       
+       ExcelNumberFormat nf = null;
+       
+       if (cfEvaluator != null) {
+           // first one wins (priority order, per Excel help)
+           List<EvaluationConditionalFormatRule> rules = cfEvaluator.getConditionalFormattingForCell(cell);
+           for (EvaluationConditionalFormatRule rule : rules) {
+               nf = rule.getNumberFormat();
+               if (nf != null) break;
+           }
+       }
+       if (nf == null) {
+           CellStyle style = cell.getCellStyle();
+           nf = ExcelNumberFormat.from(style);
+       }
+       return nf;
+   }
+   
+    /**
+     * Use this carefully, prefer factory methods to ensure id/format relationships are not broken or confused.
+     * Left public so {@link ConditionalFormattingRule#getNumberFormat()} implementations can use it.
+     * @param idx Excel number format index, either a built-in or a higher custom # mapped in the workbook style table
+     * @param format Excel number format string for the index
+     */
+    public ExcelNumberFormat(int idx, String format) {
+        this.idx = idx;
+        this.format = format;
+    }
+    
+    
+
+    /**
+     *
+     * @return Excel number format index, either a built-in or a higher custom # mapped in the workbook style table
+     */
+    public int getIdx() {
+        return idx;
+    }
+    
+    /**
+     *
+     * @return Excel number format string for the index
+     */
+    public String getFormat() {
+        return format;
+    }
+}

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFConditionalFormattingRule.java

@@ -325,6 +325,18 @@ public class XSSFConditionalFormattingRule implements ConditionalFormattingRule
         }
     }
 
+    /**
+     * Return the number format from the dxf style record if present, null if not
+     * @see org.apache.poi.ss.usermodel.ConditionalFormattingRule#getNumberFormat()
+     */
+    public ExcelNumberFormat getNumberFormat() {
+        CTDxf dxf = getDxf(false);
+        if(dxf == null || !dxf.isSetNumFmt()) return null;
+        
+        CTNumFmt numFmt = dxf.getNumFmt();
+        return new ExcelNumberFormat((int) numFmt.getNumFmtId(), numFmt.getFormatCode());
+    }
+    
     /**
      * Type of conditional formatting rule.
      */

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

@@ -21,11 +21,19 @@ import static org.junit.Assert.*;
 
 import java.io.IOException;
 
+import org.apache.poi.hssf.HSSFTestDataSamples;
+import org.apache.poi.ss.formula.ConditionalFormattingEvaluator;
+import org.apache.poi.ss.formula.WorkbookEvaluatorProvider;
 import org.apache.poi.ss.usermodel.BaseTestDataFormat;
 import org.apache.poi.ss.usermodel.BuiltinFormats;
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.ss.usermodel.CellStyle;
+import org.apache.poi.ss.usermodel.CellType;
 import org.apache.poi.ss.usermodel.DataFormat;
+import org.apache.poi.ss.usermodel.DataFormatter;
+import org.apache.poi.ss.usermodel.FormulaEvaluator;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.ss.util.CellReference;
 import org.apache.poi.xssf.XSSFITestDataProvider;
 import org.apache.poi.xssf.XSSFTestDataSamples;
 import org.junit.Test;
@@ -108,4 +116,37 @@ public final class TestXSSFDataFormat extends BaseTestDataFormat {
         wb2.close();
         wb1.close();
     }
+
+    @Test
+    public void testConditionalFormattingEvaluation() throws IOException {
+        final Workbook wb = XSSFTestDataSamples.openSampleWorkbook("61060-conditional-number-formatting.xlsx");
+
+        final DataFormatter formatter = new DataFormatter();
+        final FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
+        final ConditionalFormattingEvaluator cfEvaluator = new ConditionalFormattingEvaluator(wb, (WorkbookEvaluatorProvider) evaluator);
+
+        CellReference ref = new CellReference("A1");
+        Cell cell = wb.getSheetAt(0).getRow(ref.getRow()).getCell(ref.getCol());
+        assertEquals("0.10", formatter.formatCellValue(cell, evaluator, cfEvaluator));
+        // verify cell format without the conditional rule applied
+        assertEquals("0.1", formatter.formatCellValue(cell, evaluator));
+
+        ref = new CellReference("A3");
+        cell = wb.getSheetAt(0).getRow(ref.getRow()).getCell(ref.getCol());
+        assertEquals("-2.00E+03", formatter.formatCellValue(cell, evaluator, cfEvaluator));
+        // verify cell format without the conditional rule applied
+        assertEquals("-2000", formatter.formatCellValue(cell, evaluator));
+        
+        ref = new CellReference("A4");
+        cell = wb.getSheetAt(0).getRow(ref.getRow()).getCell(ref.getCol());
+        assertEquals("100", formatter.formatCellValue(cell, evaluator, cfEvaluator));
+        
+        ref = new CellReference("A5");
+        cell = wb.getSheetAt(0).getRow(ref.getRow()).getCell(ref.getCol());
+        assertEquals("$1,000", formatter.formatCellValue(cell, evaluator, cfEvaluator));
+        // verify cell format without the conditional rule applied
+        assertEquals("1000", formatter.formatCellValue(cell, evaluator));
+        
+        wb.close();
+    }
 }