01: /*
02: * $Id: DivideFunction.java,v 1.5 2005/05/02 22:28:41 ahimanikya Exp $
03: * =======================================================================
04: * Copyright (c) 2003-2005 Axion Development Team. All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions
08: * are met:
09: *
10: * 1. Redistributions of source code must retain the above
11: * copyright notice, this list of conditions and the following
12: * disclaimer.
13: *
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in
16: * the documentation and/or other materials provided with the
17: * distribution.
18: *
19: * 3. The names "Tigris", "Axion", nor the names of its contributors may
20: * not be used to endorse or promote products derived from this
21: * software without specific prior written permission.
22: *
23: * 4. Products derived from this software may not be called "Axion", nor
24: * may "Tigris" or "Axion" appear in their names without specific prior
25: * written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
30: * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
35: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
36: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
37: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38: * =======================================================================
39: */
40:
41: package org.axiondb.functions;
42:
43: import java.math.BigDecimal;
44:
45: import org.axiondb.AxionException;
46: import org.axiondb.FunctionFactory;
47: import org.axiondb.types.BigDecimalType;
48:
49: /**
50: * @version $Revision: 1.5 $ $Date: 2005/05/02 22:28:41 $
51: * @author Rodney Waldhoff
52: * @author Jonathan Giron
53: */
54: public class DivideFunction extends ArithmeticFunction implements
55: ScalarFunction, FunctionFactory {
56: public DivideFunction() {
57: super ("DIVIDE");
58: }
59:
60: public ConcreteFunction makeNewInstance() {
61: return new DivideFunction();
62: }
63:
64: protected BigDecimal operate(BigDecimal left, BigDecimal right)
65: throws AxionException {
66: try {
67: BigDecimal result = left.divide(right,
68: BigDecimal.ROUND_HALF_EVEN);
69: int precision = result.unscaledValue().abs().toString()
70: .length();
71: int scale = (left.scale() <= precision) ? left.scale()
72: : result.scale();
73: setDataType(new BigDecimalType(precision, scale));
74: return result;
75: } catch (ArithmeticException e) {
76: throw new AxionException(22012);
77: }
78: }
79: }
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