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Java > Open Source Codes > org > apache > derby > iapi > types > CDCDataValueFactory


1 /*
2
3    Derby - Class org.apache.derby.iapi.types.CDCDataValueFactory
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to you under the Apache License, Version 2.0
9    (the "License"); you may not use this file except in compliance with
10    the License. You may obtain a copy of the License at
11
12       http://www.apache.org/licenses/LICENSE-2.0
13
14    Unless required by applicable law or agreed to in writing, software
15    distributed under the License is distributed on an "AS IS" BASIS,
16    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17    See the License for the specific language governing permissions and
18    limitations under the License.
19
20  */

21
22 package org.apache.derby.iapi.types;
23
24 import java.util.Properties JavaDoc;
25 import org.apache.derby.iapi.services.info.JVMInfo;
26 import org.apache.derby.iapi.services.monitor.ModuleSupportable;
27 import org.apache.derby.iapi.error.StandardException;
28
29 /**
30  * DataValueFactory implementation for J2ME/CDC/Foundation.
31  * Cannot use SQLDecimal since that requires java.math.BigDecimal.
32  * Uses BigIntegerDecimal for DECIMAL support.
33  *
34  * @see DataValueFactory
35  */

36
37 public class CDCDataValueFactory extends DataValueFactoryImpl
38     implements ModuleSupportable
39 {
40      /**
41      * Make the constructor public.
42      *
43      */

44     public CDCDataValueFactory() {
45     }
46     
47     /* (non-Javadoc)
48      * @see org.apache.derby.iapi.services.monitor.ModuleSupportable#canSupport(java.util.Properties)
49      */

50     public boolean canSupport(Properties JavaDoc properties) {
51         return JVMInfo.J2ME;
52     }
53     public NumberDataValue getDecimalDataValue(Long JavaDoc value,
54             NumberDataValue previous) throws StandardException {
55         if (previous == null)
56             previous = new BigIntegerDecimal();
57
58         previous.setValue(value);
59         return previous;
60     }
61
62     public NumberDataValue getDecimalDataValue(String JavaDoc value)
63             throws StandardException {
64         NumberDataValue ndv = new BigIntegerDecimal();
65
66         ndv.setValue(value);
67         return ndv;
68     }
69
70     public NumberDataValue getNullDecimal(NumberDataValue dataValue) {
71         if (dataValue == null) {
72             return new BigIntegerDecimal();
73         } else {
74             dataValue.setToNull();
75             return dataValue;
76         }
77     }
78 }
79
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