01: package org.apache.ojb.broker.accesslayer.conversions;
02:
03: /* Copyright 2002-2005 The Apache Software Foundation
04: *
05: * Licensed under the Apache License, Version 2.0 (the "License");
06: * you may not use this file except in compliance with the License.
07: * 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: /**
19: * this implementation of the FieldConversion interface converts
20: * int to Integer, Integer to int. If the int is zero, then
21: * we don't have a value for the key and it must be set to null, not
22: * zero.
23: * @author Aaron Oathout
24: * @version $Id: Int2IntegerFieldConversion.java,v 1.5.2.1 2005/12/21 22:23:38 tomdz Exp $
25: */
26: public class Int2IntegerFieldConversion implements FieldConversion {
27:
28: private static final Integer NULL_INTEGER = null;
29: private static final Integer ZERO = new Integer(0);
30:
31: public Object javaToSql(Object obj) throws ConversionException {
32: if (obj instanceof Integer) {
33: Integer instance = (Integer) obj;
34: if (instance.equals(ZERO)) {
35: return NULL_INTEGER;
36: } else {
37: return obj;
38: }
39: } else {
40: return obj;
41: }
42: }
43:
44: public Object sqlToJava(Object obj) throws ConversionException {
45: return obj;
46: }
47: }
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