bugzilla ticket 53642: added detailed logging for formula evaluation in both HSSF and XSSF modules

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1381249 13f79535-47bb-0310-9956-ffa450edef68

src/documentation/content/xdocs/spreadsheet/eval.xml

@@ -319,16 +319,16 @@ for(int sheetNum = 0; sheetNum < wb.getNumberOfSheets(); sheetNum++) {
 	// activate logging to console
 	System.setProperty("org.apache.poi.util.POILogger", "org.apache.poi.util.SystemOutLogger");
 	System.setProperty("poi.log.level", POILogger.INFO + "");
-	
+
 	// open your file
 	Workbook wb = new HSSFWorkbook(new FileInputStream("foobar.xls"));
-    HSSFFormulaEvaluator fe = (HSSFFormulaEvaluator) wb.getCreationHelper().createFormulaEvaluator();
+    FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
 
 	// get your cell
 	Cell cell = wb.getSheet(0).getRow(0).getCell(0);		// just a dummy example
 
 	// perform debug output for the next evaluate-call only
-    fe.setDebugEvaluationOutputForNextEval(true);
+    evaluator.setDebugEvaluationOutputForNextEval(true);
 	evaluator.evaluateFormulaCell(cell);
 	evaluator.evaluateFormulaCell(cell);		// no logging performed for this next evaluate-call
 		</source>

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

@@ -389,14 +389,7 @@ public class HSSFFormulaEvaluator implements FormulaEvaluator  {
         _bookEvaluator.setIgnoreMissingWorkbooks(ignore);
     }
 
-    /**
-     * @param value whether perform detailed output
-     *
-     * Perform detailed output of formula evaluation for next evaluation only?
-     * Is for developer use only (also developers using POI for their XLS files).
-     * Log-Level WARN is for basic info, INFO for detailed information. These quite
-     * high levels are used because you have to explicitly enable this specific logging.
-     */
+    /** {@inheritDoc} */
     public void setDebugEvaluationOutputForNextEval(boolean value){
         _bookEvaluator.setDebugEvaluationOutputForNextEval(value);
     }

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

@@ -114,4 +114,15 @@ public interface FormulaEvaluator {
      * @param cell
      */
     Cell evaluateInCell(Cell cell);
+
+    /**
+     * Perform detailed output of formula evaluation for next evaluation only?
+     * Is for developer use only (also developers using POI for their XLS files).
+     * Log-Level WARN is for basic info, INFO for detailed information. These quite
+     * high levels are used because you have to explicitly enable this specific logging.
+	 
+     * @param value whether to perform detailed output
+     */
+    void setDebugEvaluationOutputForNextEval(boolean value);
+	
 }

src/java/org/apache/poi/ss/util/SheetUtil.java

@@ -61,6 +61,8 @@ public class SheetUtil {
         public void notifyUpdateCell(Cell cell) {}
         public CellValue evaluate(Cell cell) {return null;  }
         public Cell evaluateInCell(Cell cell) { return null; }
+        public void setDebugEvaluationOutputForNextEval(boolean value) {}
+
         public void evaluateAll() {}
 
         public int evaluateFormulaCell(Cell cell) {

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

@@ -279,4 +279,10 @@ public class XSSFFormulaEvaluator implements FormulaEvaluator {
 		}
 		throw new RuntimeException("Unexpected eval class (" + eval.getClass().getName() + ")");
 	}
+	
+    /** {@inheritDoc} */
+    public void setDebugEvaluationOutputForNextEval(boolean value){
+        _bookEvaluator.setDebugEvaluationOutputForNextEval(value);
+    }
+
 }