org.openrdf.rio.turtle

Class TurtleUtil

java.lang.Object

org.openrdf.rio.turtle.TurtleUtil

public class TurtleUtil
extends Object

Utility methods for Turtle encoding/decoding.

See Also:

Turtle: Terse RDF Triple Language

Field Summary

Fields

Modifier and Type	Field and Description
static char[]	LOCAL_ESCAPED_CHARS

Constructor Summary

Constructors

Constructor and Description
TurtleUtil()

Method Summary

Modifier and Type	Method and Description
static String	decodeString(String s) Decodes an encoded Turtle string.
static String	encodeLongString(String s) Encodes the supplied string for inclusion as a long string in a Turtle document.
static String	encodeString(String s) Encodes the supplied string for inclusion as a 'normal' string in a Turtle document.
static String	encodeURIString(String s) Encodes the supplied string for inclusion as a (relative) URI in a Turtle document.
static int	findURISplitIndex(String uri) Tries to find an index where the supplied URI can be split into a namespace and a local name that comply with the serialization constraints of the Turtle format.
static boolean	isLanguageChar(int c)
static boolean	isLanguageStartChar(int c)
static boolean	isLocalEscapedChar(int c)
static boolean	isNameChar(int c)
static boolean	isNameEndChar(int c)
static boolean	isNameStartChar(int c)
static boolean	isPERCENT(String name)
static boolean	isPLX_INTERNAL(String name)
static boolean	isPLX_START(String name)
static boolean	isPN_CHARS_BASE(int c) From Turtle Spec:
static boolean	isPN_CHARS_U(int c) From Turtle Spec:
static boolean	isPN_CHARS(int c) From Turtle Spec:
static boolean	isPN_LOCAL_ESC(String name)
static boolean	isPN_LOCAL(String name)
static boolean	isPN_PREFIX(String prefix) From Turtle Spec:
static boolean	isPrefixChar(int c)
static boolean	isPrefixStartChar(int c)
static boolean	isWhitespace(int c)

Methods inherited from class java.lang.Object

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

Field Detail

LOCAL_ESCAPED_CHARS

public static final char[] LOCAL_ESCAPED_CHARS

Constructor Detail

TurtleUtil

public TurtleUtil()

Method Detail

findURISplitIndex

public static int findURISplitIndex(String uri)

Tries to find an index where the supplied URI can be split into a namespace and a local name that comply with the serialization constraints of the Turtle format.

Parameters:

uri - The URI to split.

Returns:

The index where the supplied URI can be split, or -1 if the URI cannot be split.

isWhitespace

public static boolean isWhitespace(int c)

isPN_CHARS_BASE

public static boolean isPN_CHARS_BASE(int c)

From Turtle Spec:

http://www.w3.org/TR/turtle/#grammar-production-PN_CHARS_BASE

[163s] PN_CHARS_BASE ::= [A-Z] | [a-z] | [#x00C0-#x00D6] | [#x00D8-#x00F6] | [#x00F8-#x02FF] | [#x0370-#x037D] | [#x037F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]

Parameters:

c -

Returns:

isPN_CHARS_U

public static boolean isPN_CHARS_U(int c)

From Turtle Spec:

http://www.w3.org/TR/turtle/#grammar-production-PN_CHARS_U

[164s] PN_CHARS_U ::= PN_CHARS_BASE | '_'

Parameters:

c -

Returns:

isPN_CHARS

public static boolean isPN_CHARS(int c)

From Turtle Spec:

http://www.w3.org/TR/turtle/#grammar-production-PN_CHARS

[166s] PN_CHARS ::= PN_CHARS_U | '-' | [0-9] | #x00B7 | [#x0300-#x036F] | [#x203F-#x2040]

Parameters:

c -

Returns:

isPrefixStartChar

public static boolean isPrefixStartChar(int c)

isNameStartChar

public static boolean isNameStartChar(int c)

isNameChar

public static boolean isNameChar(int c)

isNameEndChar

public static boolean isNameEndChar(int c)

isLocalEscapedChar

public static boolean isLocalEscapedChar(int c)

isPrefixChar

public static boolean isPrefixChar(int c)

isLanguageStartChar

public static boolean isLanguageStartChar(int c)

isLanguageChar

public static boolean isLanguageChar(int c)

isPN_PREFIX

public static boolean isPN_PREFIX(String prefix)

From Turtle Spec:

http://www.w3.org/TR/turtle/#grammar-production-PN_PREFIX

[167s] PN_PREFIX ::= PN_CHARS_BASE ((PN_CHARS | '.')* PN_CHARS)?

Parameters:

prefix -

Returns:

true iff the supplied prefix conforms to Turtle grammar rules

isPLX_START

public static boolean isPLX_START(String name)

isPERCENT

public static boolean isPERCENT(String name)

Parameters:

substring -

Returns:

isPLX_INTERNAL

public static boolean isPLX_INTERNAL(String name)

isPN_LOCAL_ESC

public static boolean isPN_LOCAL_ESC(String name)

isPN_LOCAL

public static boolean isPN_LOCAL(String name)

encodeString

public static String encodeString(String s)

Encodes the supplied string for inclusion as a 'normal' string in a Turtle document.

encodeLongString

public static String encodeLongString(String s)

Encodes the supplied string for inclusion as a long string in a Turtle document.

encodeURIString

public static String encodeURIString(String s)

Encodes the supplied string for inclusion as a (relative) URI in a Turtle document.

decodeString

public static String decodeString(String s)

Decodes an encoded Turtle string. Any \-escape sequences are substituted with their decoded value.

Parameters:

s - An encoded Turtle string.

Returns:

The unencoded string.

Throws:

IllegalArgumentException - If the supplied string is not a correctly encoded Turtle string.