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Java > Open Source Codes > com > quadcap > sql > io > Arrays


1 package com.quadcap.sql.io;
2
3 /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.io.IOException JavaDoc;
42 import java.io.ObjectInput JavaDoc;
43 import java.io.ObjectOutput JavaDoc;
44
45 /**
46  * Serialization/deserialization utilities for arrays of bytes
47  * or ints.
48  *
49  * @author Stan Bailes
50  */
51 public class Arrays {
52     public static void writeBytes(ObjectOutput JavaDoc out, byte[] bytes)
53     throws IOException JavaDoc
54     {
55     if (bytes == null) {
56         out.write(0);
57     } else {
58         out.write(1);
59         out.writeInt(bytes.length);
60         out.write(bytes);
61     }
62     }
63
64     public static byte[] readBytes(ObjectInput JavaDoc in) throws IOException JavaDoc {
65     byte[] ret = null;
66     if (in.read() == 1) {
67         ret = new byte[in.readInt()];
68         in.read(ret);
69     }
70     return ret;
71     }
72
73     public static void writeInts(ObjectOutput JavaDoc out, int[] ints)
74     throws IOException JavaDoc
75     {
76     if (ints == null) {
77         out.write(0);
78     } else {
79         out.write(1);
80         out.writeInt(ints.length);
81         for (int i = 0; i < ints.length; i++) {
82         out.writeInt(ints[i]);
83         }
84     }
85     }
86
87     public static int[] readInts(ObjectInput JavaDoc in) throws IOException JavaDoc {
88     int[] ret = null;
89     if (in.read() == 1) {
90         ret = new int[in.readInt()];
91         for (int i = 0; i < ret.length; i++) {
92         ret[i] = in.readInt();
93         }
94     }
95     return ret;
96     }
97
98     public static void writeLongs(ObjectOutput JavaDoc out, long[] arr)
99     throws IOException JavaDoc
100     {
101     if (arr == null) {
102         out.write(0);
103     } else {
104         out.write(1);
105         out.writeInt(arr.length);
106         for (int i = 0; i < arr.length; i++) {
107         out.writeLong(arr[i]);
108         }
109     }
110     }
111
112     public static long[] readLongs(ObjectInput JavaDoc in) throws IOException JavaDoc {
113     long[] ret = null;
114     if (in.read() == 1) {
115         ret = new long[in.readInt()];
116         for (int i = 0; i < ret.length; i++) {
117         ret[i] = in.readLong();
118         }
119     }
120     return ret;
121     }
122
123 }
124
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