Bug 57003: Add implementation of function FIXED

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1637361 13f79535-47bb-0310-9956-ffa450edef68

5 files changed, 267 insertions, 2 deletions

diff --git a/src/java/org/apache/poi/ss/formula/eval/FunctionEval.java b/src/java/org/apache/poi/ss/formula/eval/FunctionEval.java
index 2809ee63f4..5622225fcb 100644
--- a/src/java/org/apache/poi/ss/formula/eval/FunctionEval.java
+++ b/src/java/org/apache/poi/ss/formula/eval/FunctionEval.java
@@ -41,6 +41,7 @@ import org.apache.poi.ss.formula.functions.Days360;
 import org.apache.poi.ss.formula.functions.Errortype;
 import org.apache.poi.ss.formula.functions.Even;
 import org.apache.poi.ss.formula.functions.FinanceFunction;
+import org.apache.poi.ss.formula.functions.Fixed;
 import org.apache.poi.ss.formula.functions.Function;
 import org.apache.poi.ss.formula.functions.Hlookup;
 import org.apache.poi.ss.formula.functions.Hyperlink;
@@ -133,7 +134,7 @@ public final class FunctionEval {
         retval[11] = new Npv();
         retval[12] = AggregateFunction.STDEV;
         retval[13] = NumericFunction.DOLLAR;
-
+        retval[14] = new Fixed();
         retval[15] = NumericFunction.SIN;
         retval[16] = NumericFunction.COS;
         retval[17] = NumericFunction.TAN;
diff --git a/src/java/org/apache/poi/ss/formula/functions/Fixed.java b/src/java/org/apache/poi/ss/formula/functions/Fixed.java
new file mode 100644
index 0000000000..d9026dcc73
--- /dev/null
+++ b/src/java/org/apache/poi/ss/formula/functions/Fixed.java
@@ -0,0 +1,106 @@
+/* ====================================================================
+   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.functions;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.text.DecimalFormat;
+import java.text.NumberFormat;
+import java.util.Locale;
+
+import org.apache.poi.ss.formula.eval.BoolEval;
+import org.apache.poi.ss.formula.eval.ErrorEval;
+import org.apache.poi.ss.formula.eval.EvaluationException;
+import org.apache.poi.ss.formula.eval.NumberEval;
+import org.apache.poi.ss.formula.eval.OperandResolver;
+import org.apache.poi.ss.formula.eval.StringEval;
+import org.apache.poi.ss.formula.eval.ValueEval;
+
+public final class Fixed implements Function1Arg, Function2Arg, Function3Arg {
+    @Override
+    public ValueEval evaluate(
+            int srcRowIndex, int srcColumnIndex,
+            ValueEval arg0, ValueEval arg1, ValueEval arg2) {
+        return fixed(arg0, arg1, arg2, srcRowIndex, srcColumnIndex);
+    }
+
+    @Override
+    public ValueEval evaluate(
+            int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1) {
+        return fixed(arg0, arg1, BoolEval.FALSE, srcRowIndex, srcColumnIndex);
+    }
+
+    @Override
+    public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0) {
+        return fixed(arg0, new NumberEval(2), BoolEval.FALSE, srcRowIndex, srcColumnIndex);
+    }
+
+    @Override
+    public ValueEval evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex) {
+        switch (args.length) {
+            case 1:
+                return fixed(args[0], new NumberEval(2), BoolEval.FALSE,
+                        srcRowIndex, srcColumnIndex);
+            case 2:
+                return fixed(args[0], args[1], BoolEval.FALSE,
+                        srcRowIndex, srcColumnIndex);
+            case 3:
+                return fixed(args[0], args[1], args[2], srcRowIndex, srcColumnIndex);
+        }
+        return ErrorEval.VALUE_INVALID;
+    }
+    
+    private ValueEval fixed(
+            ValueEval numberParam, ValueEval placesParam,
+            ValueEval skipThousandsSeparatorParam,
+            int srcRowIndex, int srcColumnIndex) {
+        try {
+            ValueEval numberValueEval =
+                    OperandResolver.getSingleValue(
+                    numberParam, srcRowIndex, srcColumnIndex);
+            BigDecimal number =
+                    new BigDecimal(OperandResolver.coerceValueToDouble(numberValueEval));
+            ValueEval placesValueEval =
+                    OperandResolver.getSingleValue(
+                    placesParam, srcRowIndex, srcColumnIndex);
+            int places = OperandResolver.coerceValueToInt(placesValueEval);
+            ValueEval skipThousandsSeparatorValueEval =
+                    OperandResolver.getSingleValue(
+                    skipThousandsSeparatorParam, srcRowIndex, srcColumnIndex);
+            Boolean skipThousandsSeparator =
+                    OperandResolver.coerceValueToBoolean(
+                    skipThousandsSeparatorValueEval, false);
+            
+            // Round number to respective places.
+            number = number.setScale(places, RoundingMode.HALF_UP);
+            
+            // Format number conditionally using a thousands separator.
+            NumberFormat nf = NumberFormat.getNumberInstance(Locale.US);
+            DecimalFormat formatter = (DecimalFormat)nf;
+            formatter.setGroupingUsed(! skipThousandsSeparator);
+            formatter.setMinimumFractionDigits(places >= 0 ? places : 0);
+            formatter.setMaximumFractionDigits(places >= 0 ? places : 0);
+            String numberString = formatter.format(number.doubleValue());
+
+            // Return the result as a StringEval.
+            return new StringEval(numberString);
+        } catch (EvaluationException e) {
+            return e.getErrorEval();
+        }
+    }
+}
diff --git a/src/resources/main/org/apache/poi/ss/formula/function/functionMetadata.txt b/src/resources/main/org/apache/poi/ss/formula/function/functionMetadata.txt
index 36775c859d..f9e91a1e3b 100644
--- a/src/resources/main/org/apache/poi/ss/formula/function/functionMetadata.txt
+++ b/src/resources/main/org/apache/poi/ss/formula/function/functionMetadata.txt
@@ -16,6 +16,7 @@
 # Created by (org.apache.poi.hssf.record.formula.function.ExcelFileFormatDocFunctionExtractor)
 # from source file 'excelfileformat.odt' (size=356107, md5=0x8f789cb6e75594caf068f8e193004ef4)
 #  ! + some manual edits !
+# See https://issues.apache.org/ooo/show_bug.cgi?id=125837 for difference in "FIXED"
 #
 #Columns: (index, name, minParams, maxParams, returnClass, paramClasses, isVolatile, hasFootnote )
 
@@ -184,7 +185,7 @@
 235	DGET	3	3	V	R R R		
 244	INFO	1	1	V	V		
 # New Built-In Sheet Functions in BIFF4
-14	FIXED	2	3	V	V V V		x
+14	FIXED	1	3	V	V V V		x
 204	USDOLLAR	1	2	V	V V		x
 215	DBCS	1	1	V	V		x
 216	RANK	2	3	V	V R V		
diff --git a/src/testcases/org/apache/poi/ss/formula/functions/TestFixed.java b/src/testcases/org/apache/poi/ss/formula/functions/TestFixed.java
new file mode 100644
index 0000000000..d6834ebcbe
--- /dev/null
+++ b/src/testcases/org/apache/poi/ss/formula/functions/TestFixed.java
@@ -0,0 +1,128 @@
+/* ====================================================================
+   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.functions;
+
+import java.io.IOException;
+
+import junit.framework.TestCase;
+
+import org.apache.poi.hssf.usermodel.HSSFCell;
+import org.apache.poi.hssf.usermodel.HSSFFormulaEvaluator;
+import org.apache.poi.hssf.usermodel.HSSFSheet;
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
+import org.apache.poi.ss.formula.eval.BoolEval;
+import org.apache.poi.ss.formula.eval.ErrorEval;
+import org.apache.poi.ss.formula.eval.NumberEval;
+import org.apache.poi.ss.formula.eval.StringEval;
+import org.apache.poi.ss.formula.eval.ValueEval;
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.CellValue;
+import org.apache.poi.ss.usermodel.ErrorConstants;
+
+public final class TestFixed extends TestCase {
+
+    private HSSFCell cell11;
+    private HSSFFormulaEvaluator evaluator;
+
+    @Override
+    public void setUp() throws IOException {
+        HSSFWorkbook wb = new HSSFWorkbook();
+        try {
+            HSSFSheet sheet = wb.createSheet("new sheet");
+            cell11 = sheet.createRow(0).createCell(0);
+            cell11.setCellType(HSSFCell.CELL_TYPE_FORMULA);
+            evaluator = new HSSFFormulaEvaluator(wb);
+        } finally {
+            wb.close();
+        }
+    }
+
+    public void testValid() {
+        // thousands separator
+        confirm("FIXED(1234.56789,2,TRUE)", "1234.57");
+        confirm("FIXED(1234.56789,2,FALSE)", "1,234.57");
+        // rounding
+        confirm("FIXED(1.8,0,TRUE)", "2");
+        confirm("FIXED(1.2,0,TRUE)", "1");
+        confirm("FIXED(1.5,0,TRUE)", "2");
+        confirm("FIXED(1,0,TRUE)", "1");
+        // fractional digits
+        confirm("FIXED(1234.56789,7,TRUE)", "1234.5678900");
+        confirm("FIXED(1234.56789,0,TRUE)", "1235");
+        confirm("FIXED(1234.56789,-1,TRUE)", "1230");
+        // less than three arguments
+        confirm("FIXED(1234.56789)", "1,234.57");
+        confirm("FIXED(1234.56789,3)", "1,234.568");
+        // invalid arguments
+        confirmValueError("FIXED(\"invalid\")");
+        confirmValueError("FIXED(1,\"invalid\")");
+        confirmValueError("FIXED(1,2,\"invalid\")");
+        // strange arguments
+        confirm("FIXED(1000,2,8)", "1000.00");
+        confirm("FIXED(1000,2,0)", "1,000.00");
+        // corner cases
+        confirm("FIXED(1.23456789012345,15,TRUE)", "1.234567890123450");
+        // Seems POI accepts longer numbers than Excel does, excel trims the
+        // number to 15 digits and removes the "9" in the formula itself.
+        // Not the fault of FIXED though.
+        // confirm("FIXED(1.234567890123459,15,TRUE)", "1.234567890123450");
+        confirm("FIXED(60,-2,TRUE)", "100");
+        confirm("FIXED(10,-2,TRUE)", "0");
+        // rounding propagation
+        confirm("FIXED(99.9,0,TRUE)", "100");
+    }
+    
+    public void testOptionalParams() {
+        Fixed fixed = new Fixed();
+        ValueEval evaluate = fixed.evaluate(0, 0, new NumberEval(1234.56789));
+        assertTrue(evaluate instanceof StringEval);
+        assertEquals("1,234.57", ((StringEval)evaluate).getStringValue());
+        
+        evaluate = fixed.evaluate(0, 0, new NumberEval(1234.56789), new NumberEval(1));
+        assertTrue(evaluate instanceof StringEval);
+        assertEquals("1,234.6", ((StringEval)evaluate).getStringValue());
+
+        evaluate = fixed.evaluate(0, 0, new NumberEval(1234.56789), new NumberEval(1), BoolEval.TRUE);
+        assertTrue(evaluate instanceof StringEval);
+        assertEquals("1234.6", ((StringEval)evaluate).getStringValue());
+
+        evaluate = fixed.evaluate(new ValueEval[] {}, 1, 1);
+        assertTrue(evaluate instanceof ErrorEval);
+
+        evaluate = fixed.evaluate(new ValueEval[] { new NumberEval(1), new NumberEval(1), new NumberEval(1), new NumberEval(1) }, 1, 1);
+        assertTrue(evaluate instanceof ErrorEval);
+    }
+
+    private void confirm(String formulaText, String expectedResult) {
+        cell11.setCellFormula(formulaText);
+        evaluator.clearAllCachedResultValues();
+        CellValue cv = evaluator.evaluate(cell11);
+        assertEquals("Wrong result type: " + cv.formatAsString(), Cell.CELL_TYPE_STRING, cv.getCellType());
+        String actualValue = cv.getStringValue();
+        assertEquals(expectedResult, actualValue);
+    }
+    
+    private void confirmValueError(String formulaText) {
+        cell11.setCellFormula(formulaText);
+        evaluator.clearAllCachedResultValues();
+        CellValue cv = evaluator.evaluate(cell11);
+        assertTrue("Wrong result type: " + cv.formatAsString(), 
+                cv.getCellType() == Cell.CELL_TYPE_ERROR
+                && cv.getErrorValue() == ErrorConstants.ERROR_VALUE);
+    }
+}
diff --git a/src/testcases/org/apache/poi/ss/formula/functions/TestFixedFunctionsFromSpreadsheet.java b/src/testcases/org/apache/poi/ss/formula/functions/TestFixedFunctionsFromSpreadsheet.java
new file mode 100644
index 0000000000..70a8a3dbfd
--- /dev/null
+++ b/src/testcases/org/apache/poi/ss/formula/functions/TestFixedFunctionsFromSpreadsheet.java
@@ -0,0 +1,29 @@
+/* ====================================================================
+   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.functions;
+
+/**
+ * Tests FIXED() as loaded from a test data spreadsheet.
+ */
+public class TestFixedFunctionsFromSpreadsheet extends BaseTestFunctionsFromSpreadsheet {
+
+    @Override
+    protected String getFilename() {
+        return "57003-FixedFunctionTestCaseData.xls";
+    }
+}