com.helger.commons.text.util

Class ABNF

java.lang.Object

com.helger.commons.text.util.ABNF

@Immutable
public final class ABNF
extends Object

This class contains the ABNF (RFC 5234 https://tools.ietf.org/html/rfc5234) core rules. All checks can be performed for values in the range 0 ≤ x ≤ 127.

Author:

Philip Helger

Field Summary

Fields

Modifier and Type	Field and Description
static int	CHECK_RANGE_MAX_INCL
static int	CHECK_RANGE_MIN_INCL

Method Summary

Modifier and Type	Method and Description
static boolean	isAlpha(int nCP) Check if the passed code point matches the following rules: %x41-5A / %x61-7A ; A-Z / a-z
static boolean	isBit(int nCP) Check if the passed code point matches the following rules: "0" / "1"
static boolean	isChar(int nCP) Check if the passed code point matches the following rules: %x01-7F → any 7-bit US-ASCII character, excluding NUL
static boolean	isCR(int nCP) Check if the passed code point matches the following rules: %x0D → carriage return
static boolean	isCtl(int nCP) Check if the passed code point matches the following rules: %x00-1F / %x7F → controls
static boolean	isDigit(int nCP) Check if the passed code point matches the following rules: %x30-39 → 0-9
static boolean	isDQuote(int nCP) Check if the passed code point matches the following rules: %x22 → " (Double Quote)
static boolean	isHexDigit(int nCP) Check if the passed code point matches the following rules: DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
static boolean	isHexDigitCaseInsensitive(int nCP) Check if the passed code point matches the following rules: DIGIT / "A" / "B" / "C" / "D" / "E" / "F" / "a" / "b" / "c" / "d" / "e" / "f" Note: this is a non-standard extension!
static boolean	isHTab(int nCP) Check if the passed code point matches the following rules: %x09 → horizontal tab
static boolean	isLF(int nCP) Check if the passed code point matches the following rules: %x0A → linefeed
static boolean	isOctet(int nCP) Check if the passed code point matches the following rules: %x00-FF → 8 bits of data
static boolean	isSP(int nCP) Check if the passed code point matches the following rules: %x20
static boolean	isVChar(int nCP) Check if the passed code point matches the following rules: %x21-7E → visible (printing) characters
static boolean	isWSP(int nCP) Check if the passed code point matches the following rules: SP / HTAB → white space

Methods inherited from class java.lang.Object

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

Field Detail

CHECK_RANGE_MIN_INCL

public static final int CHECK_RANGE_MIN_INCL

See Also:

Constant Field Values

CHECK_RANGE_MAX_INCL

public static final int CHECK_RANGE_MAX_INCL

See Also:

Constant Field Values

Method Detail

isAlpha

public static boolean isAlpha(int nCP)

Check if the passed code point matches the following rules: %x41-5A / %x61-7A ; A-Z / a-z

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isBit

public static boolean isBit(int nCP)

Check if the passed code point matches the following rules: "0" / "1"

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isChar

public static boolean isChar(int nCP)

Check if the passed code point matches the following rules: %x01-7F → any 7-bit US-ASCII character, excluding NUL

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isCR

public static boolean isCR(int nCP)

Check if the passed code point matches the following rules: %x0D → carriage return

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isCtl

public static boolean isCtl(int nCP)

Check if the passed code point matches the following rules: %x00-1F / %x7F → controls

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isDigit

public static boolean isDigit(int nCP)

Check if the passed code point matches the following rules: %x30-39 → 0-9

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isDQuote

public static boolean isDQuote(int nCP)

Check if the passed code point matches the following rules: %x22 → " (Double Quote)

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isHexDigit

public static boolean isHexDigit(int nCP)

Check if the passed code point matches the following rules: DIGIT / "A" / "B" / "C" / "D" / "E" / "F"

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

See Also:

isHexDigitCaseInsensitive(int)

isHexDigitCaseInsensitive

public static boolean isHexDigitCaseInsensitive(int nCP)

Check if the passed code point matches the following rules: DIGIT / "A" / "B" / "C" / "D" / "E" / "F" / "a" / "b" / "c" / "d" / "e" / "f"
Note: this is a non-standard extension!

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

See Also:

isHexDigit(int)

isHTab

public static boolean isHTab(int nCP)

Check if the passed code point matches the following rules: %x09 → horizontal tab

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isLF

public static boolean isLF(int nCP)

Check if the passed code point matches the following rules: %x0A → linefeed

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isOctet

public static boolean isOctet(int nCP)

Check if the passed code point matches the following rules: %x00-FF → 8 bits of data

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isSP

public static boolean isSP(int nCP)

Check if the passed code point matches the following rules: %x20

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isVChar

public static boolean isVChar(int nCP)

Check if the passed code point matches the following rules: %x21-7E → visible (printing) characters

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules

isWSP

public static boolean isWSP(int nCP)

Check if the passed code point matches the following rules: SP / HTAB → white space

Parameters:

nCP - Code point to check.

Returns:

true if it matches the rules