60 lines
1.7 KiB
Java
60 lines
1.7 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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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.eval;
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/**
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* @author Amol S. Deshmukh < amolweb at ya hoo dot com >
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*
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*/
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public final class UnaryPlusEval implements OperationEval {
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public static final OperationEval instance = new UnaryPlusEval();
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private UnaryPlusEval() {
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}
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public Eval evaluate(Eval[] args, int srcCellRow, short srcCellCol) {
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if(args.length != 1) {
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return ErrorEval.VALUE_INVALID;
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}
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double d;
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try {
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ValueEval ve = OperandResolver.getSingleValue(args[0], srcCellRow, srcCellCol);
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if(ve instanceof StringEval) {
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// Note - asymmetric with UnaryMinus
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// -"hello" evaluates to #VALUE!
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// but +"hello" evaluates to "hello"
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return ve;
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}
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d = OperandResolver.coerceValueToDouble(ve);
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} catch (EvaluationException e) {
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return e.getErrorEval();
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}
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return new NumberEval(+d);
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}
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public int getNumberOfOperands() {
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return 1;
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}
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public int getType() {
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throw new RuntimeException("obsolete code should not be called");
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}
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}
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