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.AreaEval;
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.RefEval;
28: import org.apache.poi.hssf.record.formula.eval.ValueEval;
29:
30: public class Column implements Function {
31: public Eval evaluate(Eval[] evals, int srcCellRow, short srcCellCol) {
32: ValueEval retval = null;
33: int cnum = -1;
34:
35: switch (evals.length) {
36: default:
37: retval = ErrorEval.VALUE_INVALID;
38: case 1:
39: if (evals[0] instanceof AreaEval) {
40: AreaEval ae = (AreaEval) evals[0];
41: cnum = ae.getFirstColumn();
42: } else if (evals[0] instanceof RefEval) {
43: RefEval re = (RefEval) evals[0];
44: cnum = re.getColumn();
45: } else { // anything else is not valid argument
46: retval = ErrorEval.VALUE_INVALID;
47: }
48: break;
49: case 0:
50: cnum = srcCellCol;
51: }
52:
53: if (retval == null) {
54: retval = (cnum >= 0) ? new NumberEval(cnum + 1) // +1 since excel colnums are 1 based
55: : (ValueEval) ErrorEval.VALUE_INVALID;
56: }
57:
58: return retval;
59: }
60:
61: }
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