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Java > Open Source Codes > com > versant > core > jdbc > sql > conv > BooleanArrayConverter


1
2 /*
3  * Copyright (c) 1998 - 2005 Versant Corporation
4  * All rights reserved. This program and the accompanying materials
5  * are made available under the terms of the Eclipse Public License v1.0
6  * which accompanies this distribution, and is available at
7  * http://www.eclipse.org/legal/epl-v10.html
8  *
9  * Contributors:
10  * Versant Corporation - initial API and implementation
11  */
12 package com.versant.core.jdbc.sql.conv;
13
14 import com.versant.core.jdbc.JdbcConverter;
15
16 /**
17  * This converter converts boolean[] to and from SQL. It converts the boolean[]
18  * to and from a byte[] and delegates to a nested converter.
19  * TODO This could be done much faster with java.nio buffers.
20  * @keep-all
21  */
22 public class BooleanArrayConverter extends TypeAsBytesConverterBase {
23
24     public static class Factory extends TypeAsBytesConverterBase.Factory {
25
26         protected JdbcConverter createConverter(JdbcConverter nested) {
27             return new BooleanArrayConverter(nested);
28         }
29
30     }
31
32     public BooleanArrayConverter(JdbcConverter nested) {
33         super(nested);
34     }
35
36     /**
37      * Convert a byte[] into an instance of our value class.
38      */
39     protected Object JavaDoc fromByteArray(byte[] buf) {
40         int n = buf.length;
41         boolean[] a = new boolean[n];
42         for (int i = 0; i < n; i++) {
43             a[i] = buf[i] != 0;
44         }
45         return a;
46     }
47
48     /**
49      * Convert an instance of our value class into a byte[].
50      */
51     protected byte[] toByteArray(Object JavaDoc value) {
52         if (value == null) return null;
53         boolean[] a = (boolean[])value;
54         int n = a.length;
55         byte[] buf = new byte[n];
56         for (int i = 0; i < n; i++) {
57             buf[i] = a[i] ? (byte)1 : (byte)0;
58         }
59         return buf;
60     }
61
62     /**
63      * Get the type of our expected value objects (e.g. java.util.Locale
64      * for a converter for Locale's).
65      */
66     public Class JavaDoc getValueType() {
67         return boolean[].class;
68     }
69
70 }
71
72
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