org.h2.value

类 CompareMode

java.lang.Object

org.h2.value.CompareMode

所有已实现的接口:

Comparator<Value>

直接已知子类:

CompareModeDefault, CompareModeIcu4J

public class CompareMode
extends Object
implements Comparator<Value>

Instances of this class can compare strings. Case sensitive and case insensitive comparison is supported, and comparison using a collator.

字段概要

字段

限定符和类型	字段和说明
static String	CHARSET This constant means the charset specified should be used.
static String	DEFAULT This constant means the default collator should be used, even if ICU4J is in the classpath.
static String	ICU4J This constant means ICU4J should be used (this will fail if it is not in the classpath).
static String	OFF This constant means there is no collator set, and the default string comparison is to be used.

构造器概要

构造器

限定符	构造器和说明
protected	CompareMode(String name, int strength)

方法概要

限定符和类型	方法和说明
int	compare(Value o1, Value o2)
int	compareString(String a, String b, boolean ignoreCase) Compare two strings.
boolean	equals(Object obj)
boolean	equalsChars(String a, int ai, String b, int bi, boolean ignoreCase) Compare two characters in a string.
static Locale[]	getCollationLocales(boolean onlyIfInitialized) Returns available locales for collations.
static Collator	getCollator(String name) Get the collator object for the given language name or language / country combination.
static CompareMode	getInstance(String name, int strength) Create a new compare mode with the given collator and strength.
String	getName()
static String	getName(Locale l) Get the collation name.
int	getStrength()
int	hashCode()

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

字段详细资料

OFF

public static final String OFF

This constant means there is no collator set, and the default string comparison is to be used.

另请参阅:

常量字段值

DEFAULT

public static final String DEFAULT

This constant means the default collator should be used, even if ICU4J is in the classpath.

另请参阅:

常量字段值

ICU4J

public static final String ICU4J

This constant means ICU4J should be used (this will fail if it is not in the classpath).

另请参阅:

常量字段值

CHARSET

public static final String CHARSET

This constant means the charset specified should be used. This will fail if the specified charset does not exist.

另请参阅:

常量字段值

构造器详细资料

CompareMode

protected CompareMode(String name,
                      int strength)

方法详细资料

getInstance

public static CompareMode getInstance(String name,
                                      int strength)

Create a new compare mode with the given collator and strength. If required, a new CompareMode is created, or if possible the last one is returned. A cache is used to speed up comparison when using a collator; CollationKey objects are cached.

参数:

name - the collation name or null

strength - the collation strength

返回:

the compare mode

getCollationLocales

public static Locale[] getCollationLocales(boolean onlyIfInitialized)

Returns available locales for collations.

参数:

onlyIfInitialized - if true, returns null when locales are not yet initialized

返回:

available locales for collations.

equalsChars

public boolean equalsChars(String a,
                           int ai,
                           String b,
                           int bi,
                           boolean ignoreCase)

Compare two characters in a string.

参数:

a - the first string

ai - the character index in the first string

b - the second string

bi - the character index in the second string

ignoreCase - true if a case-insensitive comparison should be made

返回:

true if the characters are equals

compareString

public int compareString(String a,
                         String b,
                         boolean ignoreCase)

Compare two strings.

参数:

a - the first string

b - the second string

ignoreCase - true if a case-insensitive comparison should be made

返回:

-1 if the first string is 'smaller', 1 if the second string is smaller, and 0 if they are equal

getName

public static String getName(Locale l)

Get the collation name.

参数:

l - the locale

返回:

the name of the collation

getCollator

public static Collator getCollator(String name)

Get the collator object for the given language name or language / country combination.

参数:

name - the language name

返回:

the collator

getName

public String getName()

getStrength

public int getStrength()

equals

public boolean equals(Object obj)

指定者:

equals 在接口中 Comparator<Value>

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

compare

public int compare(Value o1,
                   Value o2)

指定者:

compare 在接口中 Comparator<Value>