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Patch from Johan Karlsteen for bug #53966 - Implement IfError AP function

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1426382 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2012-12-28 03:34:18 +00:00
parent 21abfa9536
commit 876fea8596
3 changed files with 151 additions and 3 deletions
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5
src/java/org/apache/poi/ss/formula/atp/AnalysisToolPak.java
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@ -22,8 +22,7 @@ import org.apache.poi.ss.formula.udf.UDFFinder;
import java.util.*;
/**
* @author Josh Micich
* @author Petr Udalau - systematized work of add-in libraries and user defined functions.
* Analysis Toolpack Function Definitions
*/
public final class AnalysisToolPak implements UDFFinder {
@ -112,7 +111,7 @@ public final class AnalysisToolPak implements UDFFinder {
r(m, "HEX2BIN", null);
r(m, "HEX2DEC", null);
r(m, "HEX2OCT", null);
r(m, "IFERROR", null);
r(m, "IFERROR", IfError.instance);
r(m, "IMABS", null);
r(m, "IMAGINARY", null);
r(m, "IMARGUMENT", null);

65
src/java/org/apache/poi/ss/formula/atp/IfError.java Normal file
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@ -0,0 +1,65 @@
/* ====================================================================
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.ss.formula.atp;
import org.apache.poi.ss.formula.OperationEvaluationContext;
import org.apache.poi.ss.formula.eval.ErrorEval;
import org.apache.poi.ss.formula.eval.EvaluationException;
import org.apache.poi.ss.formula.eval.ValueEval;
import org.apache.poi.ss.formula.functions.FreeRefFunction;
/**
* Implementation of 'Analysis Toolpak' Excel function IFERROR()<br/>
*
* Returns an error text if there is an error in the evaluation<p/>
*
* <b>Syntax</b><br/>
* <b>IFERROR</b>(<b>expression</b>, <b>string</b>)
*
* @author Johan Karlsteen
*/
final class IfError implements FreeRefFunction {
public static final FreeRefFunction instance = new IfError();
private IfError() {
// enforce singleton
}
public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) {
if (args.length != 2) {
return ErrorEval.VALUE_INVALID;
}
ValueEval val;
try {
val = evaluateArgParity(args[0], args[1], ec.getRowIndex(), ec.getColumnIndex());
} catch (EvaluationException e) {
return e.getErrorEval();
}
return val;
}
private static ValueEval evaluateArgParity(ValueEval arg, ValueEval iferror, int srcCellRow, int srcCellCol) throws EvaluationException {
if(arg instanceof ErrorEval) {
return iferror;
} else {
return arg;
}
}
}

84
src/testcases/org/apache/poi/ss/formula/atp/TestIfError.java Normal file
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@ -0,0 +1,84 @@
/* ====================================================================
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.ss.formula.atp;
import junit.framework.TestCase;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.FormulaEvaluator;
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.util.CellReference;
/**
* Testcase for 'Analysis Toolpak' function IFERROR()
*
* @author Johan Karlsteen
*/
public class TestIfError extends TestCase {
/**
* =IFERROR(210/35,\"Error in calculation\")" Divides 210 by 35 and returns 6.0
* =IFERROR(55/0,\"Error in calculation\")" Divides 55 by 0 and returns the error text
*/
public static void testEvaluate(){
Workbook wb = new HSSFWorkbook();
Sheet sh = wb.createSheet();
Row row1 = sh.createRow(0);
Row row2 = sh.createRow(1);
// Create cells
row1.createCell(0, Cell.CELL_TYPE_NUMERIC);
row1.createCell(1, Cell.CELL_TYPE_NUMERIC);
row2.createCell(0, Cell.CELL_TYPE_NUMERIC);
row2.createCell(1, Cell.CELL_TYPE_NUMERIC);
// Create references
CellReference a1 = new CellReference("A1");
CellReference a2 = new CellReference("A2");
CellReference b1 = new CellReference("B1");
CellReference b2 = new CellReference("B2");
// Set values
sh.getRow(a1.getRow()).getCell(a1.getCol()).setCellValue(210);
sh.getRow(a2.getRow()).getCell(a2.getCol()).setCellValue(55);
sh.getRow(b1.getRow()).getCell(b1.getCol()).setCellValue(35);
sh.getRow(b2.getRow()).getCell(b2.getCol()).setCellValue(0);
Cell cell1 = sh.createRow(3).createCell(0);
cell1.setCellFormula("IFERROR(A1/B1,\"Error in calculation\")");
Cell cell2 = sh.createRow(3).createCell(0);
cell2.setCellFormula("IFERROR(A2/B2,\"Error in calculation\")");
double accuracy = 1E-9;
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
assertEquals("Checks that the cell is numeric",
Cell.CELL_TYPE_NUMERIC, evaluator.evaluate(cell1).getCellType());
assertEquals("Divides 210 by 35 and returns 6.0",
6.0, evaluator.evaluate(cell1).getNumberValue(), accuracy);
assertEquals("Checks that the cell is numeric",
Cell.CELL_TYPE_STRING, evaluator.evaluate(cell2).getCellType());
assertEquals("Rounds -10 to a nearest multiple of -3 (-9)",
"Error in calculation", evaluator.evaluate(cell2).getStringValue());
}
}