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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

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1+/*
2+ * Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved.
3+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4+ *
5+ * This code is free software; you can redistribute it and/or modify it
6+ * under the terms of the GNU General Public License version 2 only, as
7+ * published by the Free Software Foundation. Oracle designates this
8+ * particular file as subject to the "Classpath" exception as provided
9+ * by Oracle in the LICENSE file that accompanied this code.
10+ *
11+ * This code is distributed in the hope that it will be useful, but WITHOUT
12+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14+ * version 2 for more details (a copy is included in the LICENSE file that
15+ * accompanied this code).
16+ *
17+ * You should have received a copy of the GNU General Public License version
18+ * 2 along with this work; if not, write to the Free Software Foundation,
19+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20+ *
21+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22+ * or visit www.oracle.com if you need additional information or have any
23+ * questions.
24+ */
25+/*
26+ *******************************************************************************
27+ * (C) Copyright IBM Corp. and others, 1996-2009 - All Rights Reserved *
28+ * *
29+ * The original version of this source code and documentation is copyrighted *
30+ * and owned by IBM, These materials are provided under terms of a License *
31+ * Agreement between IBM and Sun. This technology is protected by multiple *
32+ * US and International patents. This notice and attribution to IBM may not *
33+ * to removed. *
34+ *******************************************************************************
35+ */
36+
37+package sun.text.normalizer;
38+
39+import java.util.HashMap;
40+
41+/**
42+ * Class to store version numbers of the form major.minor.milli.micro.
43+ * @author synwee
44+ * @stable ICU 2.6
45+ */
46+public final class VersionInfo
47+{
48+
49+ // public methods ------------------------------------------------------
50+
51+ /**
52+ * Returns an instance of VersionInfo with the argument version.
53+ * @param version version String in the format of "major.minor.milli.micro"
54+ * or "major.minor.milli" or "major.minor" or "major",
55+ * where major, minor, milli, micro are non-negative numbers
56+ * <= 255. If the trailing version numbers are
57+ * not specified they are taken as 0s. E.g. Version "3.1" is
58+ * equivalent to "3.1.0.0".
59+ * @return an instance of VersionInfo with the argument version.
60+ * @exception throws an IllegalArgumentException when the argument version
61+ * is not in the right format
62+ * @stable ICU 2.6
63+ */
64+ public static VersionInfo getInstance(String version)
65+ {
66+ int length = version.length();
67+ int array[] = {0, 0, 0, 0};
68+ int count = 0;
69+ int index = 0;
70+
71+ while (count < 4 && index < length) {
72+ char c = version.charAt(index);
73+ if (c == '.') {
74+ count ++;
75+ }
76+ else {
77+ c -= '0';
78+ if (c < 0 || c > 9) {
79+ throw new IllegalArgumentException(INVALID_VERSION_NUMBER_);
80+ }
81+ array[count] *= 10;
82+ array[count] += c;
83+ }
84+ index ++;
85+ }
86+ if (index != length) {
87+ throw new IllegalArgumentException(
88+ "Invalid version number: String '" + version + "' exceeds version format");
89+ }
90+ for (int i = 0; i < 4; i ++) {
91+ if (array[i] < 0 || array[i] > 255) {
92+ throw new IllegalArgumentException(INVALID_VERSION_NUMBER_);
93+ }
94+ }
95+
96+ return getInstance(array[0], array[1], array[2], array[3]);
97+ }
98+
99+ /**
100+ * Returns an instance of VersionInfo with the argument version.
101+ * @param major major version, non-negative number <= 255.
102+ * @param minor minor version, non-negative number <= 255.
103+ * @param milli milli version, non-negative number <= 255.
104+ * @param micro micro version, non-negative number <= 255.
105+ * @exception throws an IllegalArgumentException when either arguments are
106+ * negative or > 255
107+ * @stable ICU 2.6
108+ */
109+ public static VersionInfo getInstance(int major, int minor, int milli,
110+ int micro)
111+ {
112+ // checks if it is in the hashmap
113+ // else
114+ if (major < 0 || major > 255 || minor < 0 || minor > 255 ||
115+ milli < 0 || milli > 255 || micro < 0 || micro > 255) {
116+ throw new IllegalArgumentException(INVALID_VERSION_NUMBER_);
117+ }
118+ int version = getInt(major, minor, milli, micro);
119+ Integer key = Integer.valueOf(version);
120+ Object result = MAP_.get(key);
121+ if (result == null) {
122+ result = new VersionInfo(version);
123+ MAP_.put(key, result);
124+ }
125+ return (VersionInfo)result;
126+ }
127+
128+ /**
129+ * Compares other with this VersionInfo.
130+ * @param other VersionInfo to be compared
131+ * @return 0 if the argument is a VersionInfo object that has version
132+ * information equals to this object.
133+ * Less than 0 if the argument is a VersionInfo object that has
134+ * version information greater than this object.
135+ * Greater than 0 if the argument is a VersionInfo object that
136+ * has version information less than this object.
137+ * @stable ICU 2.6
138+ */
139+ public int compareTo(VersionInfo other)
140+ {
141+ return m_version_ - other.m_version_;
142+ }
143+
144+ // private data members ----------------------------------------------
145+
146+ /**
147+ * Version number stored as a byte for each of the major, minor, milli and
148+ * micro numbers in the 32 bit int.
149+ * Most significant for the major and the least significant contains the
150+ * micro numbers.
151+ */
152+ private int m_version_;
153+ /**
154+ * Map of singletons
155+ */
156+ private static final HashMap MAP_ = new HashMap();
157+ /**
158+ * Error statement string
159+ */
160+ private static final String INVALID_VERSION_NUMBER_ =
161+ "Invalid version number: Version number may be negative or greater than 255";
162+
163+ // private constructor -----------------------------------------------
164+
165+ /**
166+ * Constructor with int
167+ * @param compactversion a 32 bit int with each byte representing a number
168+ */
169+ private VersionInfo(int compactversion)
170+ {
171+ m_version_ = compactversion;
172+ }
173+
174+ /**
175+ * Gets the int from the version numbers
176+ * @param major non-negative version number
177+ * @param minor non-negativeversion number
178+ * @param milli non-negativeversion number
179+ * @param micro non-negativeversion number
180+ */
181+ private static int getInt(int major, int minor, int milli, int micro)
182+ {
183+ return (major << 24) | (minor << 16) | (milli << 8) | micro;
184+ }
185+}