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International Component for Unicode for Java (ICU4J) is a mature, widely used Java library
providing Unicode and Globalization support
/*
*******************************************************************************
* Copyright (C) 1996-2012, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
package com.ibm.icu.util;
import java.util.concurrent.ConcurrentHashMap;
/**
* Class to store version numbers of the form major.minor.milli.micro.
* @author synwee
* @stable ICU 2.6
*/
public final class VersionInfo implements Comparable
{
// public data members -------------------------------------------------
/**
* Unicode 1.0 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_1_0;
/**
* Unicode 1.0.1 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_1_0_1;
/**
* Unicode 1.1.0 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_1_1_0;
/**
* Unicode 1.1.5 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_1_1_5;
/**
* Unicode 2.0 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_2_0;
/**
* Unicode 2.1.2 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_2_1_2;
/**
* Unicode 2.1.5 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_2_1_5;
/**
* Unicode 2.1.8 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_2_1_8;
/**
* Unicode 2.1.9 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_2_1_9;
/**
* Unicode 3.0 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_3_0;
/**
* Unicode 3.0.1 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_3_0_1;
/**
* Unicode 3.1.0 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_3_1_0;
/**
* Unicode 3.1.1 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_3_1_1;
/**
* Unicode 3.2 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_3_2;
/**
* Unicode 4.0 version
* @stable ICU 2.6
*/
public static final VersionInfo UNICODE_4_0;
/**
* Unicode 4.0.1 version
* @stable ICU 3.4
*/
public static final VersionInfo UNICODE_4_0_1;
/**
* Unicode 4.1 version
* @stable ICU 3.4
*/
public static final VersionInfo UNICODE_4_1;
/**
* Unicode 5.0 version
* @stable ICU 3.4
*/
public static final VersionInfo UNICODE_5_0;
/**
* Unicode 5.1 version
* @stable ICU 4.2
*/
public static final VersionInfo UNICODE_5_1;
/**
* Unicode 5.2 version
* @stable ICU 4.4
*/
public static final VersionInfo UNICODE_5_2;
/**
* Unicode 6.0 version
* @stable ICU 4.6
*/
public static final VersionInfo UNICODE_6_0;
/**
* Unicode 6.1 version
* @stable ICU 49
*/
public static final VersionInfo UNICODE_6_1;
/**
* Unicode 6.2 version
* @stable ICU 50
*/
public static final VersionInfo UNICODE_6_2;
/**
* ICU4J current release version
* @stable ICU 2.8
*/
public static final VersionInfo ICU_VERSION;
/**
* Data version string for ICU's internal data.
* Used for appending to data path (e.g. icudt43b)
* @internal
* @deprecated This API is ICU internal only.
*/
public static final String ICU_DATA_VERSION_PATH = "50b";
/**
* Data version in ICU4J.
* @internal
* @deprecated This API is ICU internal only.
*/
public static final VersionInfo ICU_DATA_VERSION;
/**
* Collation runtime version (sort key generator, string comparisons).
* If the version is different, sort keys for the same string could be different.
* This value may change in subsequent releases of ICU.
* @stable ICU 2.8
*/
public static final VersionInfo UCOL_RUNTIME_VERSION;
/**
* Collation builder code version.
* When this is different, the same tailoring might result
* in assigning different collation elements to code points.
* This value may change in subsequent releases of ICU.
* @stable ICU 2.8
*/
public static final VersionInfo UCOL_BUILDER_VERSION;
/**
* This is the version of collation tailorings.
* This value may change in subsequent releases of ICU.
* @stable ICU 2.8
*/
public static final VersionInfo UCOL_TAILORINGS_VERSION;
// public methods ------------------------------------------------------
/**
* Returns an instance of VersionInfo with the argument version.
* @param version version String in the format of "major.minor.milli.micro"
* or "major.minor.milli" or "major.minor" or "major",
* where major, minor, milli, micro are non-negative numbers
* <= 255. If the trailing version numbers are
* not specified they are taken as 0s. E.g. Version "3.1" is
* equivalent to "3.1.0.0".
* @return an instance of VersionInfo with the argument version.
* @exception IllegalArgumentException when the argument version
* is not in the right format
* @stable ICU 2.6
*/
public static VersionInfo getInstance(String version)
{
int length = version.length();
int array[] = {0, 0, 0, 0};
int count = 0;
int index = 0;
while (count < 4 && index < length) {
char c = version.charAt(index);
if (c == '.') {
count ++;
}
else {
c -= '0';
if (c < 0 || c > 9) {
throw new IllegalArgumentException(INVALID_VERSION_NUMBER_);
}
array[count] *= 10;
array[count] += c;
}
index ++;
}
if (index != length) {
throw new IllegalArgumentException(
"Invalid version number: String '" + version + "' exceeds version format");
}
for (int i = 0; i < 4; i ++) {
if (array[i] < 0 || array[i] > 255) {
throw new IllegalArgumentException(INVALID_VERSION_NUMBER_);
}
}
return getInstance(array[0], array[1], array[2], array[3]);
}
/**
* Returns an instance of VersionInfo with the argument version.
* @param major major version, non-negative number <= 255.
* @param minor minor version, non-negative number <= 255.
* @param milli milli version, non-negative number <= 255.
* @param micro micro version, non-negative number <= 255.
* @exception IllegalArgumentException when either arguments are negative or > 255
* @stable ICU 2.6
*/
public static VersionInfo getInstance(int major, int minor, int milli,
int micro)
{
// checks if it is in the hashmap
// else
if (major < 0 || major > 255 || minor < 0 || minor > 255 ||
milli < 0 || milli > 255 || micro < 0 || micro > 255) {
throw new IllegalArgumentException(INVALID_VERSION_NUMBER_);
}
int version = getInt(major, minor, milli, micro);
Integer key = Integer.valueOf(version);
VersionInfo result = MAP_.get(key);
if (result == null) {
result = new VersionInfo(version);
VersionInfo tmpvi = MAP_.putIfAbsent(key, result);
if (tmpvi != null) {
result = tmpvi;
}
}
return result;
}
/**
* Returns an instance of VersionInfo with the argument version.
* Equivalent to getInstance(major, minor, milli, 0).
* @param major major version, non-negative number <= 255.
* @param minor minor version, non-negative number <= 255.
* @param milli milli version, non-negative number <= 255.
* @exception IllegalArgumentException when either arguments are
* negative or > 255
* @stable ICU 2.6
*/
public static VersionInfo getInstance(int major, int minor, int milli)
{
return getInstance(major, minor, milli, 0);
}
/**
* Returns an instance of VersionInfo with the argument version.
* Equivalent to getInstance(major, minor, 0, 0).
* @param major major version, non-negative number <= 255.
* @param minor minor version, non-negative number <= 255.
* @exception IllegalArgumentException when either arguments are
* negative or > 255
* @stable ICU 2.6
*/
public static VersionInfo getInstance(int major, int minor)
{
return getInstance(major, minor, 0, 0);
}
/**
* Returns an instance of VersionInfo with the argument version.
* Equivalent to getInstance(major, 0, 0, 0).
* @param major major version, non-negative number <= 255.
* @exception IllegalArgumentException when either arguments are
* negative or > 255
* @stable ICU 2.6
*/
public static VersionInfo getInstance(int major)
{
return getInstance(major, 0, 0, 0);
}
private static VersionInfo javaVersion;
/**
* @internal
* @deprecated This API is ICU internal only.
*/
public static VersionInfo javaVersion() {
if (javaVersion == null) {
String s = System.getProperty("java.version");
// clean string
// preserve only digits, separated by single '.'
// ignore over 4 digit sequences
// does not test < 255, very odd...
char[] chars = s.toCharArray();
int r = 0, w = 0, count = 0;
boolean numeric = false; // ignore leading non-numerics
while (r < chars.length) {
char c = chars[r++];
if (c < '0' || c > '9') {
if (numeric) {
if (count == 3) {
// only four digit strings allowed
break;
}
numeric = false;
chars[w++] = '.';
++count;
}
} else {
numeric = true;
chars[w++] = c;
}
}
while (w > 0 && chars[w-1] == '.') {
--w;
}
String vs = new String(chars, 0, w);
javaVersion = VersionInfo.getInstance(vs);
}
return javaVersion;
}
/**
* Returns the String representative of VersionInfo in the format of
* "major.minor.milli.micro"
* @return String representative of VersionInfo
* @stable ICU 2.6
*/
public String toString()
{
StringBuilder result = new StringBuilder(7);
result.append(getMajor());
result.append('.');
result.append(getMinor());
result.append('.');
result.append(getMilli());
result.append('.');
result.append(getMicro());
return result.toString();
}
/**
* Returns the major version number
* @return the major version number
* @stable ICU 2.6
*/
public int getMajor()
{
return (m_version_ >> 24) & LAST_BYTE_MASK_ ;
}
/**
* Returns the minor version number
* @return the minor version number
* @stable ICU 2.6
*/
public int getMinor()
{
return (m_version_ >> 16) & LAST_BYTE_MASK_ ;
}
/**
* Returns the milli version number
* @return the milli version number
* @stable ICU 2.6
*/
public int getMilli()
{
return (m_version_ >> 8) & LAST_BYTE_MASK_ ;
}
/**
* Returns the micro version number
* @return the micro version number
* @stable ICU 2.6
*/
public int getMicro()
{
return m_version_ & LAST_BYTE_MASK_ ;
}
/**
* Checks if this version information is equals to the argument version
* @param other object to be compared
* @return true if other is equals to this object's version information,
* false otherwise
* @stable ICU 2.6
*/
public boolean equals(Object other)
{
return other == this;
}
/**
* Compares other with this VersionInfo.
* @param other VersionInfo to be compared
* @return 0 if the argument is a VersionInfo object that has version
* information equals to this object.
* Less than 0 if the argument is a VersionInfo object that has
* version information greater than this object.
* Greater than 0 if the argument is a VersionInfo object that
* has version information less than this object.
* @stable ICU 2.6
*/
public int compareTo(VersionInfo other)
{
return m_version_ - other.m_version_;
}
// private data members ----------------------------------------------
/**
* Unicode data version used by the current release
*/
private static final VersionInfo UNICODE_VERSION;
/**
* Version number stored as a byte for each of the major, minor, milli and
* micro numbers in the 32 bit int.
* Most significant for the major and the least significant contains the
* micro numbers.
*/
private int m_version_;
/**
* Map of singletons
*/
private static final ConcurrentHashMap MAP_ = new ConcurrentHashMap();
/**
* Last byte mask
*/
private static final int LAST_BYTE_MASK_ = 0xFF;
/**
* Error statement string
*/
private static final String INVALID_VERSION_NUMBER_ =
"Invalid version number: Version number may be negative or greater than 255";
// static declaration ------------------------------------------------
/**
* Initialize versions only after MAP_ has been created
*/
static {
UNICODE_1_0 = getInstance(1, 0, 0, 0);
UNICODE_1_0_1 = getInstance(1, 0, 1, 0);
UNICODE_1_1_0 = getInstance(1, 1, 0, 0);
UNICODE_1_1_5 = getInstance(1, 1, 5, 0);
UNICODE_2_0 = getInstance(2, 0, 0, 0);
UNICODE_2_1_2 = getInstance(2, 1, 2, 0);
UNICODE_2_1_5 = getInstance(2, 1, 5, 0);
UNICODE_2_1_8 = getInstance(2, 1, 8, 0);
UNICODE_2_1_9 = getInstance(2, 1, 9, 0);
UNICODE_3_0 = getInstance(3, 0, 0, 0);
UNICODE_3_0_1 = getInstance(3, 0, 1, 0);
UNICODE_3_1_0 = getInstance(3, 1, 0, 0);
UNICODE_3_1_1 = getInstance(3, 1, 1, 0);
UNICODE_3_2 = getInstance(3, 2, 0, 0);
UNICODE_4_0 = getInstance(4, 0, 0, 0);
UNICODE_4_0_1 = getInstance(4, 0, 1, 0);
UNICODE_4_1 = getInstance(4, 1, 0, 0);
UNICODE_5_0 = getInstance(5, 0, 0, 0);
UNICODE_5_1 = getInstance(5, 1, 0, 0);
UNICODE_5_2 = getInstance(5, 2, 0, 0);
UNICODE_6_0 = getInstance(6, 0, 0, 0);
UNICODE_6_1 = getInstance(6, 1, 0, 0);
UNICODE_6_2 = getInstance(6, 2, 0, 0);
ICU_VERSION = getInstance(50, 2, 0, 0);
ICU_DATA_VERSION = getInstance(50, 2, 0, 0);
UNICODE_VERSION = UNICODE_6_2;
UCOL_RUNTIME_VERSION = getInstance(7);
UCOL_BUILDER_VERSION = getInstance(8);
UCOL_TAILORINGS_VERSION = getInstance(1);
}
// private constructor -----------------------------------------------
/**
* Constructor with int
* @param compactversion a 32 bit int with each byte representing a number
*/
private VersionInfo(int compactversion)
{
m_version_ = compactversion;
}
/**
* Gets the int from the version numbers
* @param major non-negative version number
* @param minor non-negativeversion number
* @param milli non-negativeversion number
* @param micro non-negativeversion number
*/
private static int getInt(int major, int minor, int milli, int micro)
{
return (major << 24) | (minor << 16) | (milli << 8) | micro;
}
///CLOVER:OFF
/**
* Main method prints out ICU version information
* @param args arguments (currently not used)
* @stable ICU 4.6
*/
public static void main(String[] args) {
String icuApiVer;
if (ICU_VERSION.getMajor() <= 4) {
if (ICU_VERSION.getMinor() % 2 != 0) {
// Development mile stone
int major = ICU_VERSION.getMajor();
int minor = ICU_VERSION.getMinor() + 1;
if (minor >= 10) {
minor -= 10;
major++;
}
icuApiVer = "" + major + "." + minor + "M" + ICU_VERSION.getMilli();
} else {
icuApiVer = ICU_VERSION.getVersionString(2, 2);
}
} else {
if (ICU_VERSION.getMinor() == 0) {
// Development mile stone
icuApiVer = "" + ICU_VERSION.getMajor() + "M" + ICU_VERSION.getMilli();
} else {
icuApiVer = ICU_VERSION.getVersionString(2, 2);
}
}
System.out.println("International Components for Unicode for Java " + icuApiVer);
System.out.println("");
System.out.println("Implementation Version: " + ICU_VERSION.getVersionString(2, 4));
System.out.println("Unicode Data Version: " + UNICODE_VERSION.getVersionString(2, 4));
System.out.println("CLDR Data Version: " + LocaleData.getCLDRVersion().getVersionString(2, 4));
System.out.println("Time Zone Data Version: " + TimeZone.getTZDataVersion());
}
/**
* Generate version string separated by dots with
* the specified digit width. Version digit 0
* after minDigits will be trimmed off.
* @param minDigits Minimum number of version digits
* @param maxDigits Maximum number of version digits
* @return A tailored version string
*/
private String getVersionString(int minDigits, int maxDigits) {
if (minDigits < 1 || maxDigits < 1
|| minDigits > 4 || maxDigits > 4 || minDigits > maxDigits) {
throw new IllegalArgumentException("Invalid min/maxDigits range");
}
int[] digits = new int[4];
digits[0] = getMajor();
digits[1] = getMinor();
digits[2] = getMilli();
digits[3] = getMicro();
int numDigits = maxDigits;
while (numDigits > minDigits) {
if (digits[numDigits - 1] != 0) {
break;
}
numDigits--;
}
StringBuilder verStr = new StringBuilder(7);
verStr.append(digits[0]);
for (int i = 1; i < numDigits; i++) {
verStr.append(".");
verStr.append(digits[i]);
}
return verStr.toString();
}
///CLOVER:ON
}