Class Character

Mimics Java's Character class.

Inheritance

System.Object

Character

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: Lucene.Net.Support

Assembly: Lucene.Net.dll

Syntax

public class Character

Fields

MAX_CODE_POINT

Declaration

public const int MAX_CODE_POINT = 1114111

Field Value

Type	Description
System.Int32

MAX_HIGH_SURROGATE

Declaration

public const char MAX_HIGH_SURROGATE = '\uDBFF'

Field Value

Type	Description
System.Char

MAX_LOW_SURROGATE

Declaration

public const char MAX_LOW_SURROGATE = '\uDFFF'

Field Value

Type	Description
System.Char

MAX_RADIX

Declaration

public const int MAX_RADIX = 36

Field Value

Type	Description
System.Int32

MAX_SURROGATE

Declaration

public const char MAX_SURROGATE = '\uDFFF'

Field Value

Type	Description
System.Char

MIN_CODE_POINT

Declaration

public const int MIN_CODE_POINT = 0

Field Value

Type	Description
System.Int32

MIN_HIGH_SURROGATE

Declaration

public const char MIN_HIGH_SURROGATE = '\uD800'

Field Value

Type	Description
System.Char

MIN_LOW_SURROGATE

Declaration

public const char MIN_LOW_SURROGATE = '\uDC00'

Field Value

Type	Description
System.Char

MIN_RADIX

Declaration

public const int MIN_RADIX = 2

Field Value

Type	Description
System.Int32

MIN_SUPPLEMENTARY_CODE_POINT

Declaration

public const int MIN_SUPPLEMENTARY_CODE_POINT = 65536

Field Value

Type	Description
System.Int32

MIN_SURROGATE

Declaration

public const char MIN_SURROGATE = '\uD800'

Field Value

Type	Description
System.Char

Methods

CharCount(Int32)

Declaration

public static int CharCount(int codePoint)

Parameters

Type	Name	Description
System.Int32	codePoint

Returns

Type	Description
System.Int32

CodePointAt(ICharSequence, Int32)

Declaration

public static int CodePointAt(ICharSequence seq, int index)

Parameters

Type	Name	Description
ICharSequence	seq
System.Int32	index

Returns

Type	Description
System.Int32

CodePointAt(Char, Char)

Declaration

public static int CodePointAt(char high, char low)

Parameters

Type	Name	Description
System.Char	high
System.Char	low

Returns

Type	Description
System.Int32

CodePointAt(Char[], Int32, Int32)

Declaration

public static int CodePointAt(char[] a, int index, int limit)

Parameters

Type	Name	Description
System.Char[]	a
System.Int32	index
System.Int32	limit

Returns

Type	Description
System.Int32

CodePointAt(String, Int32)

Declaration

public static int CodePointAt(string seq, int index)

Parameters

Type	Name	Description
System.String	seq
System.Int32	index

Returns

Type	Description
System.Int32

CodePointAt(StringBuilder, Int32)

Declaration

public static int CodePointAt(StringBuilder seq, int index)

Parameters

Type	Name	Description
System.Text.StringBuilder	seq
System.Int32	index

Returns

Type	Description
System.Int32

CodePointBefore(Char[], Int32)

Declaration

public static int CodePointBefore(char[] seq, int index)

Parameters

Type	Name	Description
System.Char[]	seq
System.Int32	index

Returns

Type	Description
System.Int32

CodePointCount(Char[], Int32, Int32)

Declaration

public static int CodePointCount(char[] a, int offset, int count)

Parameters

Type	Name	Description
System.Char[]	a
System.Int32	offset
System.Int32	count

Returns

Type	Description
System.Int32

CodePointCount(String, Int32, Int32)

Returns the number of Unicode code points in the text range of the specified char sequence. The text range begins at the specified beginIndex and extends to the char at index endIndex - 1. Thus the length (in System.Chars) of the text range is endIndex-beginIndex. Unpaired surrogates within the text range count as one code point each.

Declaration

public static int CodePointCount(string seq, int beginIndex, int endIndex)

Parameters

Type	Name	Description
System.String	seq	the char sequence
System.Int32	beginIndex	the index to the first char of the text range.
System.Int32	endIndex	the index after the last char of the text range.

Returns

Type	Description
System.Int32	the number of Unicode code points in the specified text range

Exceptions

Type	Condition
System.IndexOutOfRangeException	if the beginIndex is negative, or endIndex is larger than the length of the given sequence, or beginIndex is larger than endIndex.

Digit(Char, Int32)

Convenience method to determine the value of the specified character c in the supplied radix. The value of radix must be between MIN_RADIX and MAX_RADIX.

Declaration

public static int Digit(char c, int radix)

Parameters

Type	Name	Description
System.Char	c	The character to determine the value of.
System.Int32	radix	The radix.

Returns

Type	Description
System.Int32	The value of c in radix if radix lies between MIN_RADIX and MAX_RADIX; -1 otherwise.

ForDigit(Int32, Int32)

Declaration

public static char ForDigit(int digit, int radix)

Parameters

Type	Name	Description
System.Int32	digit
System.Int32	radix

Returns

Type	Description
System.Char

GetType(Int32)

LUCENENET safe way to get unicode category. The .NET System.Char.ConvertFromUtf32(System.Int32) method should be used first to be safe for surrogate pairs. However, if the value falls between 0x00d800 and 0x00dfff, that method throws an exception. So this is a wrapper that converts the codepoint to a char in those cases.

This mimics the behavior of the Java Character.GetType class, but returns the .NET UnicodeCategory enumeration for easy consumption.

Declaration

public static UnicodeCategory GetType(int codePoint)

Parameters

Type	Name	Description
System.Int32	codePoint

Returns

Type	Description
System.Globalization.UnicodeCategory	A System.Globalization.UnicodeCategory representing the codePoint.

IsLetter(Int32)

Declaration

public static bool IsLetter(int c)

Parameters

Type	Name	Description
System.Int32	c

Returns

Type	Description
System.Boolean

OffsetByCodePoints(Char[], Int32, Int32, Int32, Int32)

Copy of the implementation from Character class in Java

http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b27/java/lang/Character.java

Declaration

public static int OffsetByCodePoints(char[] a, int start, int count, int index, int codePointOffset)

Parameters

Type	Name	Description
System.Char[]	a
System.Int32	start
System.Int32	count
System.Int32	index
System.Int32	codePointOffset

Returns

Type	Description
System.Int32

OffsetByCodePoints(String, Int32, Int32)

Copy of the implementation from Character class in Java

http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b27/java/lang/Character.java

Declaration

public static int OffsetByCodePoints(string seq, int index, int codePointOffset)

Parameters

Type	Name	Description
System.String	seq
System.Int32	index
System.Int32	codePointOffset

Returns

Type	Description
System.Int32

ToChars(Int32)

Declaration

public static char[] ToChars(int codePoint)

Parameters

Type	Name	Description
System.Int32	codePoint

Returns

Type	Description
System.Char[]

ToChars(Int32, Char[], Int32)

Declaration

public static int ToChars(int codePoint, char[] dst, int dstIndex)

Parameters

Type	Name	Description
System.Int32	codePoint
System.Char[]	dst
System.Int32	dstIndex

Returns

Type	Description
System.Int32

ToCodePoint(Char, Char)

Declaration

public static int ToCodePoint(char high, char low)

Parameters

Type	Name	Description
System.Char	high
System.Char	low

Returns

Type	Description
System.Int32

ToLower(Int32)

Declaration

public static int ToLower(int codePoint)

Parameters

Type	Name	Description
System.Int32	codePoint

Returns

Type	Description
System.Int32

ToUpper(Int32)

Declaration

public static int ToUpper(int codePoint)

Parameters

Type	Name	Description
System.Int32	codePoint

Returns

Type	Description
System.Int32

Extension Methods

Number.IsNumber(Object)