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Bugzilla 48044 - added implementation for CountBlank function (patch from Mads Mohr Christensen)
git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@829293 13f79535-47bb-0310-9956-ffa450edef68
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@ -33,6 +33,7 @@
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<changes>
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<release version="3.6-beta1" date="2009-??-??">
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<action dev="POI-DEVELOPERS" type="add">48044 - added implementation for CountBlank function</action>
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<action dev="POI-DEVELOPERS" type="fix">48036 - added IntersectionEval to allow evaluation of the intersection formula operator</action>
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<action dev="POI-DEVELOPERS" type="fix">47999 - avoid un-needed call to the JVM Garbage Collector when working on OOXML OPC Packages</action>
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<action dev="POI-DEVELOPERS" type="add">47922 - added example HSMF application that converts a .msg file to text and extracts attachments</action>
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@ -203,6 +203,7 @@ public final class FunctionEval implements OperationEval {
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retval[345] = new Sumif();
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retval[346] = new Countif();
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retval[347] = new Countblank();
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retval[359] = new Hyperlink();
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@ -0,0 +1,67 @@
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/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hssf.record.formula.functions;
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import org.apache.poi.hssf.record.formula.eval.AreaEval;
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import org.apache.poi.hssf.record.formula.eval.BlankEval;
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import org.apache.poi.hssf.record.formula.eval.ErrorEval;
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import org.apache.poi.hssf.record.formula.eval.NumberEval;
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import org.apache.poi.hssf.record.formula.eval.RefEval;
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import org.apache.poi.hssf.record.formula.eval.ValueEval;
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import org.apache.poi.hssf.record.formula.functions.CountUtils.I_MatchPredicate;
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/**
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* Implementation for the function COUNTBLANK
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* <p>
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* Syntax: COUNTBLANK ( range )
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* <table border="0" cellpadding="1" cellspacing="0" summary="Parameter descriptions">
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* <tr><th>range </th><td>is the range of cells to count blanks</td></tr>
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* </table>
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* </p>
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*
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* @author Mads Mohr Christensen
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*/
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public final class Countblank implements Function {
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public ValueEval evaluate(ValueEval[] args, int srcRowIndex, short srcColumnIndex) {
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if (args.length != 1) {
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// TODO - it doesn't seem to be possible to enter COUNTBLANK() into Excel with the wrong arg count
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// perhaps this should be an exception
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return ErrorEval.VALUE_INVALID;
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}
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double result;
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ValueEval arg0 = args[0];
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if (arg0 instanceof RefEval) {
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result = CountUtils.countMatchingCell((RefEval) arg0, predicate);
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} else if (arg0 instanceof AreaEval) {
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result = CountUtils.countMatchingCellsInArea((AreaEval) arg0, predicate);
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} else {
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throw new IllegalArgumentException("Bad range arg type (" + arg0.getClass().getName() + ")");
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}
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return new NumberEval(result);
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}
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private static final I_MatchPredicate predicate = new I_MatchPredicate() {
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public boolean matches(ValueEval valueEval) {
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// Note - only BlankEval counts
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return valueEval == BlankEval.INSTANCE;
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}
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};
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}
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@ -46,6 +46,34 @@ public final class TestCountFuncs extends TestCase {
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private static final String NULL = null;
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public void testCountBlank() {
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AreaEval range;
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ValueEval[] values;
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values = new ValueEval[] {
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new NumberEval(0),
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new StringEval(""), // note - does not match blank
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BoolEval.TRUE,
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BoolEval.FALSE,
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ErrorEval.DIV_ZERO,
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BlankEval.INSTANCE,
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};
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range = EvalFactory.createAreaEval("A1:B3", values);
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confirmCountBlank(1, range);
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values = new ValueEval[] {
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new NumberEval(0),
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new StringEval(""), // note - does not match blank
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BlankEval.INSTANCE,
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BoolEval.FALSE,
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BoolEval.TRUE,
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BlankEval.INSTANCE,
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};
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range = EvalFactory.createAreaEval("A1:B3", values);
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confirmCountBlank(2, range);
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}
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public void testCountA() {
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ValueEval[] args;
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@ -196,6 +224,12 @@ public final class TestCountFuncs extends TestCase {
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double result = NumericFunctionInvoker.invoke(new Countif(), args);
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assertEquals(expected, result, 0);
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}
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private static void confirmCountBlank(int expected, AreaEval range) {
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ValueEval[] args = { range };
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double result = NumericFunctionInvoker.invoke(new Countblank(), args);
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assertEquals(expected, result, 0);
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}
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private static I_MatchPredicate createCriteriaPredicate(ValueEval ev) {
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return Countif.createCriteriaPredicate(ev, 0, 0);
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@ -388,10 +422,14 @@ public final class TestCountFuncs extends TestCase {
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}
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public void testCountifFromSpreadsheet() {
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final String FILE_NAME = "countifExamples.xls";
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final int START_ROW_IX = 1;
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final int COL_IX_ACTUAL = 2;
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final int COL_IX_EXPECTED = 3;
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testCountFunctionFromSpreadsheet("countifExamples.xls", 1, 2, 3, "countif");
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}
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public void testCountBlankFromSpreadsheet() {
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testCountFunctionFromSpreadsheet("countblankExamples.xls", 1, 3, 4, "countblank");
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}
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private static void testCountFunctionFromSpreadsheet(String FILE_NAME, int START_ROW_IX, int COL_IX_ACTUAL, int COL_IX_EXPECTED, String functionName) {
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int failureCount = 0;
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HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook(FILE_NAME);
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@ -415,7 +453,8 @@ public final class TestCountFuncs extends TestCase {
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}
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if (failureCount > 0) {
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throw new AssertionFailedError(failureCount + " countif evaluations failed. See stderr for more details");
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throw new AssertionFailedError(failureCount + " " + functionName
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+ " evaluations failed. See stderr for more details");
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}
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}
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}
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