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 15, 2005
19: *
20: */
21: package org.apache.poi.hssf.record.formula.functions;
22:
23: import org.apache.poi.hssf.record.formula.eval.ErrorEval;
24: import org.apache.poi.hssf.record.formula.eval.Eval;
25: import org.apache.poi.hssf.record.formula.eval.NumberEval;
26: import org.apache.poi.hssf.record.formula.eval.ValueEval;
27: import org.apache.poi.hssf.record.formula.eval.ValueEvalToNumericXlator;
28:
29: /**
30: * @author Amol S. Deshmukh < amolweb at ya hoo dot com >
31: *
32: */
33: public class Avedev extends MultiOperandNumericFunction {
34:
35: private static final ValueEvalToNumericXlator DEFAULT_NUM_XLATOR = new ValueEvalToNumericXlator(
36: (short) (0
37: // ValueEvalToNumericXlator.BOOL_IS_PARSED
38: //| ValueEvalToNumericXlator.REF_BOOL_IS_PARSED
39: //| ValueEvalToNumericXlator.EVALUATED_REF_BOOL_IS_PARSED
40: | ValueEvalToNumericXlator.STRING_IS_PARSED
41: //| ValueEvalToNumericXlator.REF_STRING_IS_PARSED
42: //| ValueEvalToNumericXlator.EVALUATED_REF_STRING_IS_PARSED
43: //| ValueEvalToNumericXlator.STRING_TO_BOOL_IS_PARSED
44: //| ValueEvalToNumericXlator.REF_STRING_TO_BOOL_IS_PARSED
45: //| ValueEvalToNumericXlator.STRING_IS_INVALID_VALUE
46: //| ValueEvalToNumericXlator.REF_STRING_IS_INVALID_VALUE
47: | ValueEvalToNumericXlator.EVALUATED_REF_BLANK_IS_PARSED));
48:
49: /**
50: * this is the default impl for the factory method getXlator
51: * of the super class NumericFunction. Subclasses can override this method
52: * if they desire to return a different ValueEvalToNumericXlator instance
53: * than the default.
54: */
55: protected ValueEvalToNumericXlator getXlator() {
56: return DEFAULT_NUM_XLATOR;
57: }
58:
59: public Eval evaluate(Eval[] operands, int srcCellRow,
60: short srcCellCol) {
61: ValueEval retval = null;
62: double[] values = getNumberArray(operands, srcCellRow,
63: srcCellCol);
64: if (values == null) {
65: retval = ErrorEval.VALUE_INVALID;
66: } else {
67: double d = StatsLib.avedev(values);
68: retval = (Double.isNaN(d) || Double.isInfinite(d)) ? (ValueEval) ErrorEval.NUM_ERROR
69: : new NumberEval(d);
70: }
71:
72: return retval;
73: }
74: }
|