Add Workbook.setCellFormulaValidation to control whether formulas are validated during Cell.setCellFormula or not

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

@@ -2269,6 +2269,27 @@ public final class HSSFWorkbook extends POIDocument implements org.apache.poi.ss
         return recalc != null && recalc.getEngineId() != 0;
     }
 
+    /**
+     * Whether a call to {@link HSSFCell#setCellFormula(String)} will validate the formula or not.
+     *
+     * @param value true if the application will validate the formula is correct
+     * @since 3.17
+     */
+    @Override
+    public void setCellFormulaValidation(final boolean value) {
+        // currently {@link HSSFCell#setCellFormula(String)} does no validation anyway, ignore
+    }
+
+    /**
+     * Whether a call to {@link HSSFCell#setCellFormula(String)} will validate the formula or not.
+     *
+     * @since 3.17
+     */
+    @Override
+    public boolean getCellFormulaValidation() {
+        return false;
+    }
+
 	/**
 	 * Changes an external referenced file to another file.
 	 * A formula in Excel which references a cell in another file is saved in two parts:

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

@@ -686,4 +686,19 @@ public interface Workbook extends Closeable, Iterable<Sheet> {
      * @throws IOException if the object can't be embedded
      */
     int addOlePackage(byte[] oleData, String label, String fileName, String command) throws IOException;
+
+    /**
+     * Whether a call to {@link Cell#setCellFormula(String)} will validate the formula or not.
+     *
+     * @param value true if the application will validate the formula is correct
+     * @since 3.17
+     */
+    void setCellFormulaValidation(boolean value);
+
+    /**
+     * Whether a call to {@link Cell#setCellFormula(String)} will validate the formula or not.
+     *
+     * @since 3.17
+     */
+    boolean getCellFormulaValidation();
 }

src/ooxml/java/org/apache/poi/xssf/streaming/SXSSFWorkbook.java

@@ -1364,5 +1364,26 @@ public class SXSSFWorkbook implements Workbook {
         return _wb.addOlePackage(oleData, label, fileName, command);
     }
 
+    /**
+     * Whether a call to {@link SXSSFCell#setCellFormula(String)} will validate the formula or not.
+     *
+     * @param value true if the application will validate the formula is correct
+     * @since 3.17
+     */
+    @Override
+    public void setCellFormulaValidation(final boolean value) {
+        // currently {@link SXSSFCell#setCellFormula(String)} does no validation anyway, ignore
+    }
+
+    /**
+     * Whether a call to {@link SXSSFCell#setCellFormula(String)} will validate the formula or not.
+     *
+     * @since 3.17
+     */
+    @Override
+    public boolean getCellFormulaValidation() {
+        return false;
+    }
+
 //end of interface implementation
 }

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

@@ -561,9 +561,11 @@ public final class XSSFCell implements Cell {
             return;
         }
 
-        XSSFEvaluationWorkbook fpb = XSSFEvaluationWorkbook.create(wb);
+        if(wb.getCellFormulaValidation()) {
-        //validate through the FormulaParser
+            XSSFEvaluationWorkbook fpb = XSSFEvaluationWorkbook.create(wb);
-        FormulaParser.parse(formula, fpb, formulaType, wb.getSheetIndex(getSheet()), getRowIndex());
+            //validate through the FormulaParser
+            FormulaParser.parse(formula, fpb, formulaType, wb.getSheetIndex(getSheet()), getRowIndex());
+        }
 
         CTCellFormula f = CTCellFormula.Factory.newInstance();
         f.setStringValue(formula);

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

@@ -208,6 +208,11 @@ public class XSSFWorkbook extends POIXMLDocument implements Workbook {
      */
     private MissingCellPolicy _missingCellPolicy = MissingCellPolicy.RETURN_NULL_AND_BLANK;
 
+    /**
+     * Whether a call to {@link XSSFCell#setCellFormula(String)} will validate the formula or not.
+     */
+    private boolean cellFormulaValidation = true;
+
     /**
      * array of pictures for this workbook
      */
@@ -2470,4 +2475,25 @@ public class XSSFWorkbook extends POIXMLDocument implements Workbook {
 
         return oleId;
     }
+
+    /**
+     * Whether a call to {@link XSSFCell#setCellFormula(String)} will validate the formula or not.
+     *
+     * @param value true if the application will validate the formula is correct
+     * @since 3.17
+     */
+    @Override
+    public void setCellFormulaValidation(final boolean value) {
+        this.cellFormulaValidation = value;
+    }
+
+    /**
+     * Whether a call to {@link XSSFCell#setCellFormula(String)} will validate the formula or not.
+     *
+     * @since 3.17
+     */
+    @Override
+    public boolean getCellFormulaValidation() {
+        return this.cellFormulaValidation;
+    }
 }