public class CollatorProvider extends Object
关键设计：
Collator 非线程安全，使用 ThreadLocal 缓存
使用示例：
CollatorProvider provider = new CollatorProvider();
// 获取 Collator（自动 ThreadLocal 缓存）
Collator collator = provider.getCollator("SQL_Latin1_General_CP1_CI_AS");
// 比较标识符
int result = collator.compare("MyTable", "MYTABLE");
// CI (Case Insensitive): result == 0
// CS (Case Sensitive): result != 0
性能特性：
| Constructor and Description |
|---|
CollatorProvider() |
| Modifier and Type | Method and Description |
|---|---|
void |
clearCache()
清理缓存（用于测试或内存管理）
|
int |
getCacheSize()
获取缓存大小（不同 collation 的数量）
|
Collator |
getCollator(String collationName)
获取 Collator 实例（ThreadLocal 缓存）
|
static boolean |
hasMeasuredAccentFolding(String collationName)
Whether GSP compares this collation with a MEASURED accent equivalence
(
SqlServerAccentFolding): Latin1_General_CI_AI, Latin1_General_CS_AI
and SQL_Latin1_General_CP1_CI_AI. |
static boolean |
isAccentInsensitive(String collationName)
Whether a SQL Server collation name says accent-insensitive: one of its underscore-separated
parts is
AI (Latin1_General_CI_AI, Latin1_General_100_CS_AI_SC,
SQL_Latin1_General_CP1_CI_AI). |
static boolean |
isCaseSensitiveCollation(String collationName)
Whether a SQL Server collation compares case-sensitively, from its name: a
_CS
part (Latin1_General_CS_AS, Latin1_General_CS_AI) or a binary collation
(_BIN, _BIN2) says yes, anything else (_CI, or no collation, which
means the case-insensitive default) says no. |
int |
testCompare(String collationName,
String str1,
String str2)
测试 collation 比较（用于调试）
|
public CollatorProvider()
public Collator getCollator(String collationName)
此方法线程安全，每个线程获得独立的 Collator 实例。
collationName - SQL Server collation 名称（例如：SQL_Latin1_General_CP1_CI_AS）public void clearCache()
警告：调用此方法后，所有线程的 Collator 实例将失效，下次访问时重新创建。
public static boolean isAccentInsensitive(String collationName)
AI (Latin1_General_CI_AI, Latin1_General_100_CS_AI_SC,
SQL_Latin1_General_CP1_CI_AI). Collation names are case-insensitive.collationName - the collation name; null is not accent-insensitive_AI collationpublic static boolean isCaseSensitiveCollation(String collationName)
_CS
part (Latin1_General_CS_AS, Latin1_General_CS_AI) or a binary collation
(_BIN, _BIN2) says yes, anything else (_CI, or no collation, which
means the case-insensitive default) says no.
The one answer to "is this collation case-sensitive" for a
IdentifierRules.CaseCompare.COLLATION_BASED cell, whose compare kind alone does not
say it: Latin1_General_CS_AI and Latin1_General_BIN2 are collation-based and
case-sensitive, SQL_Latin1_General_CP1_CI_AS is collation-based and not.
collationName - the collation name; null or empty is the case-insensitive defaultpublic static boolean hasMeasuredAccentFolding(String collationName)
SqlServerAccentFolding): Latin1_General_CI_AI, Latin1_General_CS_AI
and SQL_Latin1_General_CP1_CI_AI. Other _AI collations were not measured and
keep the comparison they had before (a _CS_AI one is then exact).collationName - the collation name; null is not measuredpublic int getCacheSize()
public int testCompare(String collationName, String str1, String str2)
collationName - collation 名称str1 - 字符串 1str2 - 字符串 2