44950 - fixed HSSFFormulaEvaluator.evaluateInCell() and Area3DEval.getValue() also added validation for number of elements in AreaEvals

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@654356 13f79535-47bb-0310-9956-ffa450edef68

src/documentation/content/xdocs/changes.xml

@@ -37,6 +37,7 @@
 
 		<!-- Don't forget to update status.xml too! -->
         <release version="3.1-beta2" date="2008-05-??">
+           <action dev="POI-DEVELOPERS" type="fix">44950 - fixed HSSFFormulaEvaluator.evaluateInCell() and Area3DEval.getValue() also added validation for number of elements in AreaEvals</action>
            <action dev="POI-DEVELOPERS" type="fix">42570 - fixed LabelRecord to use empty string instead of null when the length is zero.</action>
            <action dev="POI-DEVELOPERS" type="fix">42564 - fixed ArrayPtg to use ConstantValueParser.  Fixed a few other ArrayPtg encoding issues.</action>
            <action dev="POI-DEVELOPERS" type="fix">Follow-on from 28754 - StringPtg.toFormulaString() should escape double quotes</action>

src/documentation/content/xdocs/status.xml

@@ -34,6 +34,7 @@
 	<!-- Don't forget to update changes.xml too! -->
     <changes>
         <release version="3.1-beta2" date="2008-05-??">
+           <action dev="POI-DEVELOPERS" type="fix">44950 - fixed HSSFFormulaEvaluator.evaluateInCell() and Area3DEval.getValue() also added validation for number of elements in AreaEvals</action>
            <action dev="POI-DEVELOPERS" type="fix">42570 - fixed LabelRecord to use empty string instead of null when the length is zero.</action>
            <action dev="POI-DEVELOPERS" type="fix">42564 - fixed ArrayPtg to use ConstantValueParser.  Fixed a few other ArrayPtg encoding issues.</action>
            <action dev="POI-DEVELOPERS" type="fix">Follow-on from 28754 - StringPtg.toFormulaString() should escape double quotes</action>

src/java/org/apache/poi/hssf/record/formula/eval/Area2DEval.java

@@ -22,79 +22,11 @@ import org.apache.poi.hssf.record.formula.Ptg;
 
 /**
  * @author Amol S. Deshmukh < amolweb at ya hoo dot com >
- *   
+ * 
  */
-public final class Area2DEval implements AreaEval {
-// TODO -refactor with Area3DEval
-    private final AreaPtg _delegate;
+public final class Area2DEval extends AreaEvalBase {
 
-    private final ValueEval[] _values;
-
-    public Area2DEval(Ptg ptg, ValueEval[] values) {
-        if(ptg == null) {
-            throw new IllegalArgumentException("ptg must not be null");
-        }
-        if(values == null) {
-            throw new IllegalArgumentException("values must not be null");
-        }
-        for(int i=values.length-1; i>=0; i--) {
-            if(values[i] == null) {
-                throw new IllegalArgumentException("value array elements must not be null");
-            }
-        }
-        // TODO - check size of array vs size of AreaPtg
-        _delegate = (AreaPtg) ptg;
-        _values = values;
-    }
-
-    public int getFirstColumn() {
-        return _delegate.getFirstColumn();
-    }
-
-    public int getFirstRow() {
-        return _delegate.getFirstRow();
-    }
-
-    public int getLastColumn() {
-        return _delegate.getLastColumn();
-    }
-
-    public int getLastRow() {
-        return _delegate.getLastRow();
-    }
-
-    public ValueEval[] getValues() {
-        return _values;
-    }
-    
-    public ValueEval getValueAt(int row, int col) {
-        ValueEval retval;
-        int index = ((row-getFirstRow())*(getLastColumn()-getFirstColumn()+1))+(col-getFirstColumn());
-        if (index <0 || index >= _values.length)
-            retval = ErrorEval.VALUE_INVALID;
-        else 
-            retval = _values[index];
-        return retval;
-    }
-    
-    public boolean contains(int row, int col) {
-        return (getFirstRow() <= row) && (getLastRow() >= row) 
-            && (getFirstColumn() <= col) && (getLastColumn() >= col);
-    }
-    
-    public boolean containsRow(int row) {
-        return (getFirstRow() <= row) && (getLastRow() >= row);
-    }
-    
-    public boolean containsColumn(short col) {
-        return (getFirstColumn() <= col) && (getLastColumn() >= col);
-    }
-    
-    public boolean isColumn() {
-        return _delegate.getFirstColumn() == _delegate.getLastColumn();
-    }
-
-    public boolean isRow() {
-        return _delegate.getFirstRow() == _delegate.getLastRow();
-    }
-}
+	public Area2DEval(Ptg ptg, ValueEval[] values) {
+		super((AreaPtg) ptg, values);
+	}
+}

src/java/org/apache/poi/hssf/record/formula/eval/Area3DEval.java

@@ -22,84 +22,18 @@ import org.apache.poi.hssf.record.formula.Ptg;
 
 /**
  * @author Amol S. Deshmukh < amolweb at ya hoo dot com >
- *  
+ * 
  */
-public final class Area3DEval implements AreaEval {
-	// TODO -refactor with Area3DEval
-    private final Area3DPtg _delegate;
+public final class Area3DEval extends AreaEvalBase {
 
-    private final ValueEval[] _values;
+	private final int _externSheetIndex;
 
-    public Area3DEval(Ptg ptg, ValueEval[] values) {
-        if(ptg == null) {
-            throw new IllegalArgumentException("ptg must not be null");
-        }
-        if(values == null) {
-            throw new IllegalArgumentException("values must not be null");
-        }
-        for(int i=values.length-1; i>=0; i--) {
-            if(values[i] == null) {
-                throw new IllegalArgumentException("value array elements must not be null");
-            }
-        }
-        // TODO - check size of array vs size of AreaPtg
-        _values = values;
-        _delegate = (Area3DPtg) ptg;
-    }
+	public Area3DEval(Ptg ptg, ValueEval[] values) {
+		super((Area3DPtg) ptg, values);
+		_externSheetIndex = ((Area3DPtg) ptg).getExternSheetIndex();
+	}
 
-    public int getFirstColumn() {
-        return _delegate.getFirstColumn();
-    }
-
-    public int getFirstRow() {
-        return _delegate.getFirstRow();
-    }
-
-    public int getLastColumn() {
-        return (short) _delegate.getLastColumn();
-    }
-
-    public int getLastRow() {
-        return _delegate.getLastRow();
-    }
-
-    public ValueEval[] getValues() {
-        return _values;
-    }
-    
-    public ValueEval getValueAt(int row, int col) {
-        ValueEval retval;
-        int index = (row-getFirstRow())*(col-getFirstColumn());
-        if (index <0 || index >= _values.length)
-            retval = ErrorEval.VALUE_INVALID;
-        else 
-            retval = _values[index];
-        return retval;
-    }
-    
-    public boolean contains(int row, int col) {
-        return (getFirstRow() <= row) && (getLastRow() >= row) 
-            && (getFirstColumn() <= col) && (getLastColumn() >= col);
-    }
-    
-    public boolean containsRow(int row) {
-        return (getFirstRow() <= row) && (getLastRow() >= row);
-    }
-    
-    public boolean containsColumn(short col) {
-        return (getFirstColumn() <= col) && (getLastColumn() >= col);
-    }
-    
-    
-    public boolean isColumn() {
-        return _delegate.getFirstColumn() == _delegate.getLastColumn();
-    }
-
-    public boolean isRow() {
-        return _delegate.getFirstRow() == _delegate.getLastRow();
-    }
-
-    public int getExternSheetIndex() {
-        return _delegate.getExternSheetIndex();
-    }
+	public int getExternSheetIndex() {
+		return _externSheetIndex;
+	}
 }

src/java/org/apache/poi/hssf/record/formula/eval/AreaEvalBase.java

@@ -0,0 +1,122 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.poi.hssf.record.formula.eval;
+
+import org.apache.poi.hssf.record.formula.AreaI;
+
+/**
+ * @author Josh Micich
+ */
+abstract class AreaEvalBase implements AreaEval {
+
+	private final int _firstColumn;
+	private final int _firstRow;
+	private final int _lastColumn;
+	private final int _lastRow;
+	private final ValueEval[] _values;
+	private final int _nColumns;
+	private final int _nRows;
+
+	protected AreaEvalBase(AreaI ptg, ValueEval[] values) {
+		if (values == null) {
+			throw new IllegalArgumentException("values must not be null");
+		}
+		_firstRow = ptg.getFirstRow();
+		_firstColumn = ptg.getFirstColumn();
+		_lastRow = ptg.getLastRow();
+		_lastColumn = ptg.getLastColumn();
+		
+		_nColumns = _lastColumn - _firstColumn + 1;
+		_nRows = _lastRow - _firstRow + 1;
+		
+		int expectedItemCount = _nRows * _nColumns;
+		if ((values.length != expectedItemCount)) {
+			// Note - this math may need alteration when POI starts to support full column or full row refs
+			throw new IllegalArgumentException("Array size should be (" + expectedItemCount
+					+ ") but was (" + values.length + ")");
+		}
+		
+
+
+		for (int i = values.length - 1; i >= 0; i--) {
+			if (values[i] == null) {
+				throw new IllegalArgumentException("value array elements must not be null");
+			}
+		}
+		_values = values;
+	}
+
+	public final int getFirstColumn() {
+		return _firstColumn;
+	}
+
+	public final int getFirstRow() {
+		return _firstRow;
+	}
+
+	public final int getLastColumn() {
+		return _lastColumn;
+	}
+
+	public final int getLastRow() {
+		return _lastRow;
+	}
+
+	public final ValueEval[] getValues() {
+		// TODO - clone() - but some junits rely on not cloning at the moment
+		return _values;
+	}
+
+	public final ValueEval getValueAt(int row, int col) {
+		int rowOffsetIx = row - _firstRow;
+		int colOffsetIx = col - _firstColumn;
+		
+		if(rowOffsetIx < 0 || rowOffsetIx >= _nRows) {
+			throw new IllegalArgumentException("Specified row index (" + row 
+					+ ") is outside the allowed range (" + _firstRow + ".." + _lastRow + ")");
+		}
+		if(colOffsetIx < 0 || colOffsetIx >= _nColumns) {
+			throw new IllegalArgumentException("Specified column index (" + col 
+					+ ") is outside the allowed range (" + _firstColumn + ".." + col + ")");
+		}
+
+		int index = rowOffsetIx * _nColumns + colOffsetIx;
+		return _values[index];
+	}
+
+	public final boolean contains(int row, int col) {
+		return _firstRow <= row && _lastRow >= row 
+			&& _firstColumn <= col && _lastColumn >= col;
+	}
+
+	public final boolean containsRow(int row) {
+		return (_firstRow <= row) && (_lastRow >= row);
+	}
+
+	public final boolean containsColumn(short col) {
+		return (_firstColumn <= col) && (_lastColumn >= col);
+	}
+
+	public final boolean isColumn() {
+		return _firstColumn == _lastColumn;
+	}
+
+	public final boolean isRow() {
+		return _firstRow == _lastRow;
+	}
+}

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

@@ -817,8 +817,7 @@ public class HSSFCell
         int row=record.getRow();
         short col=record.getColumn();
         short styleIndex=record.getXFIndex();
-        if ((cellType != CELL_TYPE_ERROR) && (cellType != CELL_TYPE_FORMULA))
-        {
+        if (cellType != CELL_TYPE_ERROR) {
             setCellType(CELL_TYPE_ERROR, false, row, col, styleIndex);
         }
         (( BoolErrRecord ) record).setValue(value);

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

@@ -232,8 +232,7 @@ public class HSSFFormulaEvaluator {
                     cell.setCellValue(cv.getBooleanValue());
                     break;
                 case HSSFCell.CELL_TYPE_ERROR:
-                    cell.setCellType(HSSFCell.CELL_TYPE_ERROR);
-                    cell.setCellValue(cv.getErrorValue());
+                    cell.setCellErrorValue(cv.getErrorValue());
                     break;
                 case HSSFCell.CELL_TYPE_NUMERIC:
                     cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);

src/testcases/org/apache/poi/hssf/record/formula/eval/AllFormulaEvalTests.java

@@ -28,7 +28,8 @@ import junit.framework.TestSuite;
 public class AllFormulaEvalTests {
 	
 	public static Test suite() {
-		TestSuite result = new TestSuite("Tests for org.apache.poi.hssf.record.formula.eval");
+		TestSuite result = new TestSuite(AllFormulaEvalTests.class.getName());
+		result.addTestSuite(TestAreaEval.class);
 		result.addTestSuite(TestCircularReferences.class);
 		result.addTestSuite(TestExternalFunction.class);
 		result.addTestSuite(TestFormulaBugs.class);

src/testcases/org/apache/poi/hssf/record/formula/eval/TestAreaEval.java

@@ -0,0 +1,62 @@
+/* ====================================================================
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+
+package org.apache.poi.hssf.record.formula.eval;
+
+import junit.framework.AssertionFailedError;
+import junit.framework.TestCase;
+
+import org.apache.poi.hssf.record.formula.Area3DPtg;
+
+/**
+ * Tests for <tt>AreaEval</tt>
+ *  
+ * @author Josh Micich
+ */
+public final class TestAreaEval extends TestCase {
+
+	public void testGetValue_bug44950() {
+		
+		Area3DPtg ptg = new Area3DPtg("B2:D3", (short)0);
+		NumberEval one = new NumberEval(1);
+		ValueEval[] values = {
+				one,	
+				new NumberEval(2),	
+				new NumberEval(3),	
+				new NumberEval(4),	
+				new NumberEval(5),	
+				new NumberEval(6),	
+		};
+		AreaEval ae = new Area3DEval(ptg, values);
+		if (one == ae.getValueAt(1, 2)) {
+			throw new AssertionFailedError("Identified bug 44950 a");
+		}
+		confirm(1, ae, 1, 1);
+		confirm(2, ae, 1, 2);
+		confirm(3, ae, 1, 3);
+		confirm(4, ae, 2, 1);
+		confirm(5, ae, 2, 2);
+		confirm(6, ae, 2, 3);
+		
+	}
+
+	private static void confirm(int expectedValue, AreaEval ae, int row, int col) {
+		NumberEval v = (NumberEval) ae.getValueAt(row, col);
+		assertEquals(expectedValue, v.getNumberValue(), 0.0);
+	}
+
+}

src/testcases/org/apache/poi/hssf/record/formula/functions/TestCountFuncs.java

@@ -67,7 +67,7 @@ public final class TestCountFuncs extends TestCase {
 		args = new Eval[] {
 			EvalFactory.createAreaEval("D1:F5", 3, 5),	// 15
 			EvalFactory.createRefEval("A1"),	
-			EvalFactory.createAreaEval("A1:F6", 7, 6),	// 42
+			EvalFactory.createAreaEval("A1:G6", 7, 6),	// 42
 			new NumberEval(0),
 		};
 		confirmCountA(59, args);
@@ -87,7 +87,7 @@ public final class TestCountFuncs extends TestCase {
 				BoolEval.TRUE,
 				BlankEval.INSTANCE,
 		};
-		range = createAreaEval("A1:B2", values);
+		range = createAreaEval("A1:B3", values);
 		confirmCountIf(2, range, BoolEval.TRUE);
 		
 		// when criteria is numeric
@@ -98,9 +98,8 @@ public final class TestCountFuncs extends TestCase {
 				new NumberEval(2),	
 				new NumberEval(2),	
 				BoolEval.TRUE,
-				BlankEval.INSTANCE,
 		};
-		range = createAreaEval("A1:B2", values);
+		range = createAreaEval("A1:B3", values);
 		confirmCountIf(3, range, new NumberEval(2));
 		// note - same results when criteria is a string that parses as the number with the same value
 		confirmCountIf(3, range, new StringEval("2.00"));

src/testcases/org/apache/poi/hssf/record/formula/functions/TestIndex.java

@@ -44,7 +44,7 @@ public final class TestIndex extends TestCase {
 			7, 8,
 			9, 10,
 			11, 12,
-			13, // excess array element. TODO - Area2DEval currently has no validation to ensure correct size of values array
+//			13, // excess array element. TODO - Area2DEval currently has no validation to ensure correct size of values array
 	};
 	
 	/**

src/testcases/org/apache/poi/hssf/usermodel/AllUserModelTests.java

@@ -38,10 +38,12 @@ public class AllUserModelTests {
 		result.addTestSuite(TestEscherGraphics2d.class);
 		result.addTestSuite(TestFontDetails.class);
 		result.addTestSuite(TestFormulas.class);
+		result.addTestSuite(TestFormulaEvaluatorBugs.class);
+		result.addTestSuite(TestFormulaEvaluatorDocs.class);
 		result.addTestSuite(TestHSSFCell.class);
 		result.addTestSuite(TestHSSFClientAnchor.class);
-		result.addTestSuite(TestHSSFConditionalFormatting.class);
 		result.addTestSuite(TestHSSFComment.class);
+		result.addTestSuite(TestHSSFConditionalFormatting.class);
 		result.addTestSuite(TestHSSFDateUtil.class);
 		result.addTestSuite(TestHSSFHeaderFooter.class);
 		result.addTestSuite(TestHSSFHyperlink.class);
@@ -54,17 +56,19 @@ public class AllUserModelTests {
 		result.addTestSuite(TestHSSFSheet.class);
 		result.addTestSuite(TestHSSFSheetOrder.class);
 		result.addTestSuite(TestHSSFSheetSetOrder.class);
+		result.addTestSuite(TestHSSFTextbox.class);
 		result.addTestSuite(TestHSSFWorkbook.class);
 		result.addTestSuite(TestNamedRange.class);
 		result.addTestSuite(TestOLE2Embeding.class);
+		result.addTestSuite(TestPOIFSProperties.class);
 		result.addTestSuite(TestReadWriteChart.class);
 		result.addTestSuite(TestSanityChecker.class);
 		result.addTestSuite(TestSheetHiding.class);
 		result.addTestSuite(TestSheetShiftRows.class);
 		if (false) { // deliberately avoiding this one
-            result.addTestSuite(TestUnfixedBugs.class);
-        }
-        result.addTestSuite(TestUnicodeWorkbook.class);
+			result.addTestSuite(TestUnfixedBugs.class);
+		}
+		result.addTestSuite(TestUnicodeWorkbook.class);
 		result.addTestSuite(TestUppercaseWorkbook.class);
 		result.addTestSuite(TestWorkbook.class);		
 		

src/testcases/org/apache/poi/hssf/usermodel/TestFormulaEvaluatorBugs.java

@@ -22,12 +22,14 @@ import java.io.FileOutputStream;
 import java.util.Iterator;
 import java.util.List;
 
+import junit.framework.AssertionFailedError;
 import junit.framework.TestCase;
 
 import org.apache.poi.hssf.HSSFTestDataSamples;
 import org.apache.poi.hssf.record.aggregates.FormulaRecordAggregate;
 import org.apache.poi.hssf.record.formula.AreaPtg;
 import org.apache.poi.hssf.record.formula.FuncVarPtg;
+
 /**
  * 
  */
@@ -51,42 +53,41 @@ public final class TestFormulaEvaluatorBugs extends TestCase {
 	 */
 	public void test44636() throws Exception {
 		// Open the existing file, tweak one value and
-		//  re-calculate
+		// re-calculate
 
 		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("44636.xls");
-		HSSFSheet sheet = wb.getSheetAt (0);
-		HSSFRow row = sheet.getRow (0);
+		HSSFSheet sheet = wb.getSheetAt(0);
+		HSSFRow row = sheet.getRow(0);
 
-		row.getCell((short)0).setCellValue(4.2);
-		row.getCell((short)2).setCellValue(25);
+		row.getCell((short) 0).setCellValue(4.2);
+		row.getCell((short) 2).setCellValue(25);
 
 		HSSFFormulaEvaluator.evaluateAllFormulaCells(wb);
-		assertEquals(4.2*25, row.getCell((short)3).getNumericCellValue(), 0.0001);
+		assertEquals(4.2 * 25, row.getCell((short) 3).getNumericCellValue(), 0.0001);
 
 		// Save
-		File existing = new File(tmpDirName,"44636-existing.xls");
+		File existing = new File(tmpDirName, "44636-existing.xls");
 		FileOutputStream out = new FileOutputStream(existing);
 		wb.write(out);
 		out.close();
 		System.err.println("Existing file for bug #44636 written to " + existing.toString());
 
-
 		// Now, do a new file from scratch
 		wb = new HSSFWorkbook();
 		sheet = wb.createSheet();
 
 		row = sheet.createRow(0);
-		row.createCell((short)0).setCellValue(1.2);
-		row.createCell((short)1).setCellValue(4.2);
+		row.createCell((short) 0).setCellValue(1.2);
+		row.createCell((short) 1).setCellValue(4.2);
 
 		row = sheet.createRow(1);
-		row.createCell((short)0).setCellFormula("SUM(A1:B1)");
+		row.createCell((short) 0).setCellFormula("SUM(A1:B1)");
 
 		HSSFFormulaEvaluator.evaluateAllFormulaCells(wb);
-		assertEquals(5.4, row.getCell((short)0).getNumericCellValue(), 0.0001);
+		assertEquals(5.4, row.getCell((short) 0).getNumericCellValue(), 0.0001);
 
 		// Save
-		File scratch = new File(tmpDirName,"44636-scratch.xls");
+		File scratch = new File(tmpDirName, "44636-scratch.xls");
 		out = new FileOutputStream(scratch);
 		wb.write(out);
 		out.close();
@@ -105,62 +106,62 @@ public final class TestFormulaEvaluatorBugs extends TestCase {
 		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("44297.xls");
 
 		HSSFRow row;
-		HSSFCell  cell;
+		HSSFCell cell;
 
-		HSSFSheet sheet   = wb.getSheetAt(0);
+		HSSFSheet sheet = wb.getSheetAt(0);
 
 		HSSFFormulaEvaluator eva = new HSSFFormulaEvaluator(sheet, wb);
 
 		row = sheet.getRow(0);
-		cell = row.getCell((short)0);
+		cell = row.getCell((short) 0);
 		assertEquals("31+46", cell.getCellFormula());
 		eva.setCurrentRow(row);
 		assertEquals(77, eva.evaluate(cell).getNumberValue(), 0);
 
 		row = sheet.getRow(1);
-		cell = row.getCell((short)0);
+		cell = row.getCell((short) 0);
 		assertEquals("30+53", cell.getCellFormula());
 		eva.setCurrentRow(row);
 		assertEquals(83, eva.evaluate(cell).getNumberValue(), 0);
 
 		row = sheet.getRow(2);
-		cell = row.getCell((short)0);
+		cell = row.getCell((short) 0);
 		assertEquals("SUM(A1:A2)", cell.getCellFormula());
 		eva.setCurrentRow(row);
 		assertEquals(160, eva.evaluate(cell).getNumberValue(), 0);
 
 		row = sheet.getRow(4);
-		cell = row.getCell((short)0);
+		cell = row.getCell((short) 0);
 		assertEquals("32767+32768", cell.getCellFormula());
 		eva.setCurrentRow(row);
 		assertEquals(65535, eva.evaluate(cell).getNumberValue(), 0);
 
 		row = sheet.getRow(7);
-		cell = row.getCell((short)0);
+		cell = row.getCell((short) 0);
 		assertEquals("32744+42333", cell.getCellFormula());
 		eva.setCurrentRow(row);
 		assertEquals(75077, eva.evaluate(cell).getNumberValue(), 0);
 
 		row = sheet.getRow(8);
-		cell = row.getCell((short)0);
+		cell = row.getCell((short) 0);
 		assertEquals("327680.0/32768", cell.getCellFormula());
 		eva.setCurrentRow(row);
 		assertEquals(10, eva.evaluate(cell).getNumberValue(), 0);
 
 		row = sheet.getRow(9);
-		cell = row.getCell((short)0);
+		cell = row.getCell((short) 0);
 		assertEquals("32767+32769", cell.getCellFormula());
 		eva.setCurrentRow(row);
 		assertEquals(65536, eva.evaluate(cell).getNumberValue(), 0);
 
 		row = sheet.getRow(10);
-		cell = row.getCell((short)0);
+		cell = row.getCell((short) 0);
 		assertEquals("35000+36000", cell.getCellFormula());
 		eva.setCurrentRow(row);
 		assertEquals(71000, eva.evaluate(cell).getNumberValue(), 0);
 
 		row = sheet.getRow(11);
-		cell = row.getCell((short)0);
+		cell = row.getCell((short) 0);
 		assertEquals("-1000000.0-3000000.0", cell.getCellFormula());
 		eva.setCurrentRow(row);
 		assertEquals(-4000000, eva.evaluate(cell).getNumberValue(), 0);
@@ -176,30 +177,29 @@ public final class TestFormulaEvaluatorBugs extends TestCase {
 
 		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("SingleLetterRanges.xls");
 
-		HSSFSheet sheet   = wb.getSheetAt(0);
+		HSSFSheet sheet = wb.getSheetAt(0);
 
 		HSSFFormulaEvaluator eva = new HSSFFormulaEvaluator(sheet, wb);
 
-		// =index(C:C,2,1)   -> 2
+		// =index(C:C,2,1) -> 2
 		HSSFRow rowIDX = sheet.getRow(3);
-		// =sum(C:C)		 -> 6
+		// =sum(C:C) -> 6
 		HSSFRow rowSUM = sheet.getRow(4);
-		// =sum(C:D)		 -> 66
+		// =sum(C:D) -> 66
 		HSSFRow rowSUM2D = sheet.getRow(5);
 
 		// Test the sum
-		HSSFCell cellSUM = rowSUM.getCell((short)0);
+		HSSFCell cellSUM = rowSUM.getCell((short) 0);
 
-		FormulaRecordAggregate frec = 
-			(FormulaRecordAggregate)cellSUM.getCellValueRecord();
+		FormulaRecordAggregate frec = (FormulaRecordAggregate) cellSUM.getCellValueRecord();
 		List ops = frec.getFormulaRecord().getParsedExpression();
 		assertEquals(2, ops.size());
 		assertEquals(AreaPtg.class, ops.get(0).getClass());
 		assertEquals(FuncVarPtg.class, ops.get(1).getClass());
 
-		// Actually stored as C1 to C65536 
-		//  (last row is -1 === 65535)
-		AreaPtg ptg = (AreaPtg)ops.get(0);
+		// Actually stored as C1 to C65536
+		// (last row is -1 === 65535)
+		AreaPtg ptg = (AreaPtg) ops.get(0);
 		assertEquals(2, ptg.getFirstColumn());
 		assertEquals(2, ptg.getLastColumn());
 		assertEquals(0, ptg.getFirstRow());
@@ -207,26 +207,25 @@ public final class TestFormulaEvaluatorBugs extends TestCase {
 		assertEquals("C:C", ptg.toFormulaString(wb));
 
 		// Will show as C:C, but won't know how many
-		//  rows it covers as we don't have the sheet
-		//  to hand when turning the Ptgs into a string
+		// rows it covers as we don't have the sheet
+		// to hand when turning the Ptgs into a string
 		assertEquals("SUM(C:C)", cellSUM.getCellFormula());
 		eva.setCurrentRow(rowSUM);
 
 		// But the evaluator knows the sheet, so it
-		//  can do it properly
+		// can do it properly
 		assertEquals(6, eva.evaluate(cellSUM).getNumberValue(), 0);
 
-
 		// Test the index
 		// Again, the formula string will be right but
-		//  lacking row count, evaluated will be right
-		HSSFCell cellIDX = rowIDX.getCell((short)0);
+		// lacking row count, evaluated will be right
+		HSSFCell cellIDX = rowIDX.getCell((short) 0);
 		assertEquals("INDEX(C:C,2,1)", cellIDX.getCellFormula());
 		eva.setCurrentRow(rowIDX);
 		assertEquals(2, eva.evaluate(cellIDX).getNumberValue(), 0);
 
 		// Across two colums
-		HSSFCell cellSUM2D = rowSUM2D.getCell((short)0);
+		HSSFCell cellSUM2D = rowSUM2D.getCell((short) 0);
 		assertEquals("SUM(C:D)", cellSUM2D.getCellFormula());
 		eva.setCurrentRow(rowSUM2D);
 		assertEquals(66, eva.evaluate(cellSUM2D).getNumberValue(), 0);
@@ -240,7 +239,7 @@ public final class TestFormulaEvaluatorBugs extends TestCase {
 		HSSFSheet sheet = wb.createSheet();
 		wb.setSheetName(0, "Sheet1");
 		HSSFRow row = sheet.createRow(0);
-		HSSFCell cell = row.createCell((short)0);
+		HSSFCell cell = row.createCell((short) 0);
 
 		cell.setCellFormula("1=1");
 
@@ -253,29 +252,46 @@ public final class TestFormulaEvaluatorBugs extends TestCase {
 		}
 		assertEquals(true, cell.getBooleanCellValue());
 	}
-	
+
 	public void testClassCast_bug44861() throws Exception {
-		HSSFWorkbook wb = HSSFTestDataSamples.
-			openSampleWorkbook("44861.xls");
-		
+		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("44861.xls");
+
 		// Check direct
 		HSSFFormulaEvaluator.evaluateAllFormulaCells(wb);
-		
+
 		// And via calls
 		int numSheets = wb.getNumberOfSheets();
-		for(int i=0; i<numSheets; i++) {
+		for (int i = 0; i < numSheets; i++) {
 			HSSFSheet s = wb.getSheetAt(i);
-			HSSFFormulaEvaluator eval = new HSSFFormulaEvaluator(s,wb);
-			
-			for(Iterator rows = s.rowIterator(); rows.hasNext();) {
-		        HSSFRow r = (HSSFRow)rows.next();
-		        eval.setCurrentRow(r);
-		        
-		        for(Iterator cells = r.cellIterator(); cells.hasNext();) {
-		        	HSSFCell c = (HSSFCell)cells.next();
-		        	eval.evaluateFormulaCell(c);
-		        }
+			HSSFFormulaEvaluator eval = new HSSFFormulaEvaluator(s, wb);
+
+			for (Iterator rows = s.rowIterator(); rows.hasNext();) {
+				HSSFRow r = (HSSFRow) rows.next();
+				eval.setCurrentRow(r);
+
+				for (Iterator cells = r.cellIterator(); cells.hasNext();) {
+					HSSFCell c = (HSSFCell) cells.next();
+					eval.evaluateFormulaCell(c);
+				}
 			}
 		}
 	}
+
+	public void testEvaluateInCellWithErrorCode_bug44950() {
+		HSSFWorkbook wb = new HSSFWorkbook();
+		HSSFSheet sheet = wb.createSheet("Sheet1");
+		HSSFRow row = sheet.createRow(1);
+		HSSFCell cell = row.createCell((short) 0);
+		cell.setCellFormula("na()"); // this formula evaluates to an Excel error code '#N/A'
+		HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(sheet, wb);
+		fe.setCurrentRow(row);
+		try {
+			fe.evaluateInCell(cell);
+		} catch (NumberFormatException e) {
+			if (e.getMessage().equals("You cannot get an error value from a non-error cell")) {
+				throw new AssertionFailedError("Identified bug 44950 b");
+			}
+			throw e;
+		}
+	}
 }