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Bugzilla 46065 - added implementation for VALUE function 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@708262 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Josh Micich 2008-10-27 18:16:44 +00:00
parent d8650576fb
commit e11be8a729
5 changed files with 281 additions and 21 deletions
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1
src/documentation/content/xdocs/changes.xml
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@ -37,6 +37,7 @@
<!-- Don't forget to update status.xml too! -->
<release version="3.5-beta4" date="2008-??-??">
<action dev="POI-DEVELOPERS" type="add">46065 - added implementation for VALUE function</action>
<action dev="POI-DEVELOPERS" type="add">45966 - added implementation for FIND function</action>
<action dev="POI-DEVELOPERS" type="fix">45778 - fixed ObjRecord to read ftLbsData properly</action>
<action dev="POI-DEVELOPERS" type="fix">46053 - fixed evaluation cache dependency analysis when changing blank cells</action>

1
src/documentation/content/xdocs/status.xml
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@ -34,6 +34,7 @@
<!-- Don't forget to update changes.xml too! -->
<changes>
<release version="3.5-beta4" date="2008-??-??">
<action dev="POI-DEVELOPERS" type="add">46065 - added implementation for VALUE function</action>
<action dev="POI-DEVELOPERS" type="add">45966 - added implementation for FIND function</action>
<action dev="POI-DEVELOPERS" type="fix">45778 - fixed ObjRecord to read ftLbsData properly</action>
<action dev="POI-DEVELOPERS" type="fix">46053 - fixed evaluation cache dependency analysis when changing blank cells</action>

205
src/java/org/apache/poi/hssf/record/formula/functions/Value.java
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@ -1,25 +1,188 @@
/*
* 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.
*/
/*
* Created on May 15, 2005
*
*/
/* ====================================================================
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.functions;
public class Value extends NotImplementedFunction {
import org.apache.poi.hssf.record.formula.eval.ErrorEval;
import org.apache.poi.hssf.record.formula.eval.Eval;
import org.apache.poi.hssf.record.formula.eval.EvaluationException;
import org.apache.poi.hssf.record.formula.eval.NumberEval;
import org.apache.poi.hssf.record.formula.eval.OperandResolver;
import org.apache.poi.hssf.record.formula.eval.ValueEval;
/**
* Implementation for Excel VALUE() function.<p/>
*
* <b>Syntax</b>:<br/> <b>VALUE</b>(<b>text</b>)<br/>
*
* Converts the text argument to a number. Leading and/or trailing whitespace is
* ignored. Currency symbols and thousands separators are stripped out.
* Scientific notation is also supported. If the supplied text does not convert
* properly the result is <b>#VALUE!</b> error. Blank string converts to zero.
*
* @author Josh Micich
*/
public final class Value implements Function {
/** "1,0000" is valid, "1,00" is not */
private static final int MIN_DISTANCE_BETWEEN_THOUSANDS_SEPARATOR = 4;
private static final Double ZERO = new Double(0.0);
public Eval evaluate(Eval[] args, int srcCellRow, short srcCellCol) {
if (args.length != 1) {
return ErrorEval.VALUE_INVALID;
}
ValueEval veText;
try {
veText = OperandResolver.getSingleValue(args[0], srcCellRow, srcCellCol);
} catch (EvaluationException e) {
return e.getErrorEval();
}
String strText = OperandResolver.coerceValueToString(veText);
Double result = convertTextToNumber(strText);
if (result == null) {
return ErrorEval.VALUE_INVALID;
}
return new NumberEval(result.doubleValue());
}
/**
* TODO see if the same functionality is needed in {@link OperandResolver#parseDouble(String)}
*
* @return <code>null</code> if there is any problem converting the text
*/
private static Double convertTextToNumber(String strText) {
boolean foundCurrency = false;
boolean foundUnaryPlus = false;
boolean foundUnaryMinus = false;
int len = strText.length();
int i;
for (i = 0; i < len; i++) {
char ch = strText.charAt(i);
if (Character.isDigit(ch) || ch == '.') {
break;
}
switch (ch) {
case ' ':
// intervening spaces between '$', '-', '+' are OK
continue;
case '$':
if (foundCurrency) {
// only one currency symbols is allowed
return null;
}
foundCurrency = true;
continue;
case '+':
if (foundUnaryMinus || foundUnaryPlus) {
return null;
}
foundUnaryPlus = true;
continue;
case '-':
if (foundUnaryMinus || foundUnaryPlus) {
return null;
}
foundUnaryMinus = true;
continue;
default:
// all other characters are illegal
return null;
}
}
if (i >= len) {
// didn't find digits or '.'
if (foundCurrency || foundUnaryMinus || foundUnaryPlus) {
return null;
}
return ZERO;
}
// remove thousands separators
boolean foundDecimalPoint = false;
int lastThousandsSeparatorIndex = Short.MIN_VALUE;
StringBuffer sb = new StringBuffer(len);
for (; i < len; i++) {
char ch = strText.charAt(i);
if (Character.isDigit(ch)) {
sb.append(ch);
continue;
}
switch (ch) {
case ' ':
String remainingText = strText.substring(i);
if (remainingText.trim().length() > 0) {
// intervening spaces not allowed once the digits start
return null;
}
break;
case '.':
if (foundDecimalPoint) {
return null;
}
if (i - lastThousandsSeparatorIndex < MIN_DISTANCE_BETWEEN_THOUSANDS_SEPARATOR) {
return null;
}
foundDecimalPoint = true;
sb.append('.');
continue;
case ',':
if (foundDecimalPoint) {
// thousands separators not allowed after '.' or 'E'
return null;
}
int distanceBetweenThousandsSeparators = i - lastThousandsSeparatorIndex;
// as long as there are 3 or more digits between
if (distanceBetweenThousandsSeparators < MIN_DISTANCE_BETWEEN_THOUSANDS_SEPARATOR) {
return null;
}
lastThousandsSeparatorIndex = i;
// don't append ','
continue;
case 'E':
case 'e':
if (i - lastThousandsSeparatorIndex < MIN_DISTANCE_BETWEEN_THOUSANDS_SEPARATOR) {
return null;
}
// append rest of strText and skip to end of loop
sb.append(strText.substring(i));
i = len;
break;
default:
// all other characters are illegal
return null;
}
}
if (!foundDecimalPoint) {
if (i - lastThousandsSeparatorIndex < MIN_DISTANCE_BETWEEN_THOUSANDS_SEPARATOR) {
return null;
}
}
double d;
try {
d = Double.parseDouble(sb.toString());
} catch (NumberFormatException e) {
// still a problem parsing the number - probably out of range
return null;
}
return new Double(foundUnaryMinus ? -d : d);
}
}

1
src/testcases/org/apache/poi/hssf/record/formula/functions/AllIndividualFunctionEvaluationTests.java
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@ -50,6 +50,7 @@ public final class AllIndividualFunctionEvaluationTests {
result.addTestSuite(TestStatsLib.class);
result.addTestSuite(TestTFunc.class);
result.addTestSuite(TestTrim.class);
result.addTestSuite(TestValue.class);
result.addTestSuite(TestXYNumericFunction.class);
return result;
}

94
src/testcases/org/apache/poi/hssf/record/formula/functions/TestValue.java Normal file
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@ -0,0 +1,94 @@
/* ====================================================================
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.functions;
import junit.framework.TestCase;
import org.apache.poi.hssf.record.formula.eval.ErrorEval;
import org.apache.poi.hssf.record.formula.eval.Eval;
import org.apache.poi.hssf.record.formula.eval.NumberEval;
import org.apache.poi.hssf.record.formula.eval.StringEval;
/**
* Tests for {@link Value}
*
* @author Josh Micich
*/
public final class TestValue extends TestCase {
private static Eval invokeValue(String strText) {
Eval[] args = new Eval[] { new StringEval(strText), };
return new Value().evaluate(args, -1, (short) -1);
}
private static void confirmValue(String strText, double expected) {
Eval result = invokeValue(strText);
assertEquals(NumberEval.class, result.getClass());
assertEquals(expected, ((NumberEval) result).getNumberValue(), 0.0);
}
private static void confirmValueError(String strText) {
Eval result = invokeValue(strText);
assertEquals(ErrorEval.class, result.getClass());
assertEquals(ErrorEval.VALUE_INVALID, result);
}
public void testBasic() {
confirmValue("100", 100);
confirmValue("-2.3", -2.3);
confirmValue(".5", 0.5);
confirmValue(".5e2", 50);
confirmValue(".5e-2", 0.005);
confirmValue(".5e+2", 50);
confirmValue("+5", 5);
confirmValue("$1,000", 1000);
confirmValue("100.5e1", 1005);
confirmValue("1,0000", 10000);
confirmValue("1,000,0000", 10000000);
confirmValue("1,000,0000,00000", 1000000000000.0);
confirmValue(" 100 ", 100);
confirmValue(" + 100", 100);
confirmValue("10000", 10000);
confirmValue("$-5", -5);
confirmValue("$.5", 0.5);
confirmValue("123e+5", 12300000);
confirmValue("1,000e2", 100000);
confirmValue("$10e2", 1000);
confirmValue("$1,000e2", 100000);
}
public void testErrors() {
confirmValueError("1+1");
confirmValueError("1 1");
confirmValueError("1,00.0");
confirmValueError("1,00");
confirmValueError("$1,00.5e1");
confirmValueError("1,00.5e1");
confirmValueError("1,0,000");
confirmValueError("1,00,000");
confirmValueError("++100");
confirmValueError("$$5");
confirmValueError("-");
confirmValueError("+");
confirmValueError("$");
confirmValueError(",300");
confirmValueError("0.233,4");
confirmValueError("1e2.5");
}
}