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.BoolEval;
25: import org.apache.poi.hssf.record.formula.eval.ErrorEval;
26: import org.apache.poi.hssf.record.formula.eval.Eval;
27: import org.apache.poi.hssf.record.formula.eval.StringEval;
28: import org.apache.poi.hssf.record.formula.eval.StringValueEval;
29: import org.apache.poi.hssf.record.formula.eval.ValueEval;
30:
31: /**
32: * @author Amol S. Deshmukh < amolweb at ya hoo dot com >
33: *
34: */
35: public class Exact extends TextFunction {
36:
37: public Eval evaluate(Eval[] operands, int srcCellRow,
38: short srcCellCol) {
39: ValueEval retval = null;
40: String s0 = null;
41: String s1 = null;
42:
43: switch (operands.length) {
44: default:
45: retval = ErrorEval.VALUE_INVALID;
46: break;
47: case 2:
48: ValueEval ve = singleOperandEvaluate(operands[0],
49: srcCellRow, srcCellCol);
50: if (ve instanceof StringValueEval) {
51: StringValueEval sve = (StringValueEval) ve;
52: s0 = sve.getStringValue();
53: } else if (ve instanceof BlankEval) {
54: s0 = StringEval.EMPTY_INSTANCE.getStringValue();
55: } else {
56: retval = ErrorEval.VALUE_INVALID;
57: break;
58: }
59:
60: if (retval == null) {
61: ve = singleOperandEvaluate(operands[1], srcCellRow,
62: srcCellCol);
63: if (ve instanceof StringValueEval) {
64: StringValueEval sve = (StringValueEval) ve;
65: s1 = sve.getStringValue();
66: } else if (ve instanceof BlankEval) {
67: s1 = StringEval.EMPTY_INSTANCE.getStringValue();
68: } else {
69: retval = ErrorEval.VALUE_INVALID;
70: break;
71: }
72: }
73: }
74:
75: if (retval == null) {
76: boolean b = s0.equals(s1);
77: retval = b ? BoolEval.TRUE : BoolEval.FALSE;
78: }
79:
80: return retval;
81: }
82: }
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