01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: /*
18: * Created on May 6, 2005
19: *
20: */
21: package org.apache.poi.hssf.record.formula.functions;
22:
23: import org.apache.poi.hssf.record.formula.eval.BlankEval;
24: import org.apache.poi.hssf.record.formula.eval.ErrorEval;
25: import org.apache.poi.hssf.record.formula.eval.Eval;
26: import org.apache.poi.hssf.record.formula.eval.NumberEval;
27: import org.apache.poi.hssf.record.formula.eval.NumericValueEval;
28: import org.apache.poi.hssf.record.formula.eval.ValueEval;
29:
30: /**
31: * @author Amol S. Deshmukh < amolweb at ya hoo dot com >
32: *
33: */
34: public class Cosh extends NumericFunction {
35:
36: public Eval evaluate(Eval[] operands, int srcRow, short srcCol) {
37: double d = 0;
38: ValueEval retval = null;
39:
40: switch (operands.length) {
41: default:
42: retval = ErrorEval.VALUE_INVALID;
43: break;
44: case 1:
45: ValueEval ve = singleOperandEvaluate(operands[0], srcRow,
46: srcCol);
47: if (ve instanceof NumericValueEval) {
48: NumericValueEval ne = (NumericValueEval) ve;
49: d = ne.getNumberValue();
50: } else if (ve instanceof BlankEval) {
51: // do nothing
52: } else {
53: retval = ErrorEval.NUM_ERROR;
54: }
55: }
56:
57: if (retval == null) {
58: d = MathX.cosh(d);
59: retval = (Double.isNaN(d) || Double.isInfinite(d)) ? (ValueEval) ErrorEval.VALUE_INVALID
60: : new NumberEval(d);
61: }
62: return retval;
63: }
64:
65: }
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