77 lines
3.0 KiB
Java
77 lines
3.0 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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/*
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* Created on May 15, 2005
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*
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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.ErrorEval;
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import org.apache.poi.hssf.record.formula.eval.Eval;
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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.ValueEval;
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import org.apache.poi.hssf.record.formula.eval.ValueEvalToNumericXlator;
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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 class Average extends MultiOperandNumericFunction {
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private static final ValueEvalToNumericXlator DEFAULT_NUM_XLATOR =
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new ValueEvalToNumericXlator((short) (
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ValueEvalToNumericXlator.BOOL_IS_PARSED
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//| ValueEvalToNumericXlator.REF_BOOL_IS_PARSED
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//| ValueEvalToNumericXlator.EVALUATED_REF_BOOL_IS_PARSED
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| ValueEvalToNumericXlator.STRING_IS_PARSED
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//| ValueEvalToNumericXlator.REF_STRING_IS_PARSED
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//| ValueEvalToNumericXlator.EVALUATED_REF_STRING_IS_PARSED
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//| ValueEvalToNumericXlator.STRING_TO_BOOL_IS_PARSED
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//| ValueEvalToNumericXlator.REF_STRING_TO_BOOL_IS_PARSED
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//| ValueEvalToNumericXlator.STRING_IS_INVALID_VALUE
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//| ValueEvalToNumericXlator.REF_STRING_IS_INVALID_VALUE
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));
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/**
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* this is the default impl for the factory method getXlator
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* of the super class NumericFunction. Subclasses can override this method
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* if they desire to return a different ValueEvalToNumericXlator instance
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* than the default.
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*/
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protected ValueEvalToNumericXlator getXlator() {
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return DEFAULT_NUM_XLATOR;
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}
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public Eval evaluate(Eval[] operands, int srcCellRow, short srcCellCol) {
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ValueEval retval = null;
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double[] values = getNumberArray(operands, srcCellRow, srcCellCol);
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if (values == null) {
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retval = ErrorEval.VALUE_INVALID;
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}
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else {
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double d = MathX.average(values);
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retval = (Double.isNaN(d) || Double.isInfinite(d))
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? (ValueEval) ErrorEval.NUM_ERROR
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: new NumberEval(d);
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}
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return retval;
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}
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}
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