74 lines
2.9 KiB
Java
74 lines
2.9 KiB
Java
/* ====================================================================
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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.ss.formula.functions;
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import org.apache.poi.ss.formula.OperationEvaluationContext;
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import org.apache.poi.ss.formula.eval.*;
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import java.math.BigDecimal;
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/**
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* Implementation for Excel REPT () function.<p/>
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* <p/>
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* <b>Syntax</b>:<br/> <b>REPT </b>(<b>text</b>,<b>number_times</b> )<br/>
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* <p/>
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* Repeats text a given number of times. Use REPT to fill a cell with a number of instances of a text string.
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*
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* text : text The text that you want to repeat.
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* number_times: A positive number specifying the number of times to repeat text.
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*
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* If number_times is 0 (zero), REPT returns "" (empty text).
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* If this argument contains a decimal value, this function ignores the numbers to the right side of the decimal point.
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*
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* The result of the REPT function cannot be longer than 32,767 characters, or REPT returns #VALUE!.
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*
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* @author cedric dot walter @ gmail dot com
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*/
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public class Rept extends Fixed2ArgFunction {
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public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval text, ValueEval number_times) {
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ValueEval veText1;
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try {
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veText1 = OperandResolver.getSingleValue(text, srcRowIndex, srcColumnIndex);
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} catch (EvaluationException e) {
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return e.getErrorEval();
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}
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String strText1 = OperandResolver.coerceValueToString(veText1);
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double numberOfTime = 0;
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try {
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numberOfTime = OperandResolver.coerceValueToDouble(number_times);
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} catch (EvaluationException e) {
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return ErrorEval.VALUE_INVALID;
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}
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int numberOfTimeInt = new Double(numberOfTime).intValue();
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StringBuffer strb = new StringBuffer(strText1.length() * numberOfTimeInt);
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for(int i = 0; i < numberOfTimeInt; i++) {
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strb.append(strText1);
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}
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if (strb.toString().length() > 32767) {
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return ErrorEval.VALUE_INVALID;
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}
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return new StringEval(strb.toString());
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}
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}
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