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.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.StringEval;
27: import org.apache.poi.hssf.record.formula.eval.StringValueEval;
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 Upper extends TextFunction {
35:
36: public Eval evaluate(Eval[] operands, int srcCellRow,
37: short srcCellCol) {
38: ValueEval retval = null;
39: String s = null;
40:
41: switch (operands.length) {
42: default:
43: retval = ErrorEval.VALUE_INVALID;
44: break;
45: case 1:
46: ValueEval ve = singleOperandEvaluate(operands[0],
47: srcCellRow, srcCellCol);
48: if (ve instanceof StringValueEval) {
49: StringValueEval sve = (StringValueEval) ve;
50: s = sve.getStringValue();
51: } else if (ve instanceof BlankEval) {
52: } else {
53: retval = ErrorEval.VALUE_INVALID;
54: break;
55: }
56: }
57:
58: if (retval == null) {
59: s = (s == null) ? EMPTY_STRING : s;
60: retval = new StringEval(s.toUpperCase());
61: }
62:
63: return retval;
64: }
65: }
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