KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > derby > iapi > types > J2SEDataValueFactory


1 /*
2
3    Derby - Class org.apache.derby.iapi.types.J2SEDataValueFactory
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
26 import org.apache.derby.iapi.error.StandardException;
27
28 /**
29  * DataValueFactory implementation for J2SE.
30  * Uses SQLDecimal for DECIMAL which implements
31  * DECIMAL functionality using java.math.BigDecimal.
32  *
33  * @see DataValueFactory
34  */
35 public class J2SEDataValueFactory extends DataValueFactoryImpl
36 {
37     public J2SEDataValueFactory() {
38     }
39
40     public void boot(boolean create, Properties JavaDoc properties) throws StandardException {
41         
42         NumberDataType.MINLONG_MINUS_ONE = SQLDecimal.MINLONG_MINUS_ONE;
43         NumberDataType.MAXLONG_PLUS_ONE = SQLDecimal.MAXLONG_PLUS_ONE;
44
45         super.boot(create, properties);
46     }
47     
48     public NumberDataValue getDecimalDataValue(Long JavaDoc value,
49             NumberDataValue previous) throws StandardException {
50         if (previous == null)
51             previous = new SQLDecimal();
52
53         previous.setValue(value);
54         return previous;
55     }
56
57     public NumberDataValue getDecimalDataValue(String JavaDoc value)
58             throws StandardException {
59         if (value != null)
60             return new SQLDecimal(value);
61         else
62             return new SQLDecimal();
63     }
64
65     public NumberDataValue getNullDecimal(NumberDataValue dataValue) {
66         if (dataValue == null) {
67             return new SQLDecimal();
68         } else {
69             dataValue.setToNull();
70             return dataValue;
71         }
72     }
73 }
74
Popular Tags