net.sf.saxon.charcode
Class UTF16

java.lang.Object
  net.sf.saxon.charcode.UTF16

public class UTF16
extends Object

A class to hold some static constants and methods associated with processing UTF16 and surrogate pairs

Field Summary

static int	NONBMP_MAX
static int	NONBMP_MIN
static char	SURROGATE1_MAX
static char	SURROGATE1_MIN
static char	SURROGATE2_MAX
static char	SURROGATE2_MIN

Constructor Summary

UTF16()

Method Summary

static int	combinePair(char high, char low) Return the non-BMP character corresponding to a given surrogate pair surrogates.
static char	highSurrogate(int ch) Return the high surrogate of a non-BMP character
static boolean	isHighSurrogate(int ch) Test whether the given character is a high surrogate
static boolean	isLowSurrogate(int ch) Test whether the given character is a low surrogate
static boolean	isSurrogate(int c) Test whether a given character is a surrogate (high or low)
static char	lowSurrogate(int ch) Return the low surrogate of a non-BMP character

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NONBMP_MIN

public static final int NONBMP_MIN

See Also:

Constant Field Values

NONBMP_MAX

public static final int NONBMP_MAX

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Constant Field Values

SURROGATE1_MIN

public static final char SURROGATE1_MIN

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Constant Field Values

SURROGATE1_MAX

public static final char SURROGATE1_MAX

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Constant Field Values

SURROGATE2_MIN

public static final char SURROGATE2_MIN

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Constant Field Values

SURROGATE2_MAX

public static final char SURROGATE2_MAX

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Constant Field Values

Constructor Detail

UTF16

public UTF16()

Method Detail

combinePair

public static int combinePair(char high,
                              char low)

Return the non-BMP character corresponding to a given surrogate pair surrogates.

Parameters:

high - The high surrogate.

low - The low surrogate.

Returns:

the Unicode codepoint represented by the surrogate pair

highSurrogate

public static char highSurrogate(int ch)

Return the high surrogate of a non-BMP character

Parameters:

ch - The Unicode codepoint of the non-BMP character to be divided.

Returns:

the first character in the surrogate pair

lowSurrogate

public static char lowSurrogate(int ch)

Return the low surrogate of a non-BMP character

Parameters:

ch - The Unicode codepoint of the non-BMP character to be divided.

Returns:

the second character in the surrogate pair

isSurrogate

public static boolean isSurrogate(int c)

Test whether a given character is a surrogate (high or low)

Parameters:

c - the character to test

Returns:

true if the character is the high or low half of a surrogate pair

isHighSurrogate

public static boolean isHighSurrogate(int ch)

Test whether the given character is a high surrogate

Parameters:

ch - The character to test.

Returns:

true if the character is the first character in a surrogate pair

isLowSurrogate

public static boolean isLowSurrogate(int ch)

Test whether the given character is a low surrogate

Parameters:

ch - The character to test.

Returns:

true if the character is the second character in a surrogate pair