TurtleUtil (RDF4J 2.5.4 API)

java.lang.Object
- org.eclipse.rdf4j.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

Fields
Modifier and Type	Field and Description
`static char[]`	`LOCAL_ESCAPED_CHARS`

Constructor Summary

Constructors
Constructor and Description

TurtleUtil()

Constructors
Constructor and Description
`TurtleUtil()`

Method Summary

All Methods Static Methods Concrete Methods
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`	`isBLANK_NODE_LABEL_Char(int codePoint)` Check if the supplied code point represents a valid blank node label character.
`static boolean`	`isBLANK_NODE_LABEL_EndChar(int codePoint)` Check if the supplied code point represents a valid blank node label end character.
`static boolean`	`isBLANK_NODE_LABEL_StartChar(int codePoint)` Check if the supplied code point represents a valid start character for a blank node label.
`static boolean`	`isLanguageChar(int codePoint)` Check if the supplied code point represents a valid language tag character.
`static boolean`	`isLanguageStartChar(int codePoint)` Check if the supplied code point represents a valid language tag start character.
`static boolean`	`isLocalEscapedChar(int codePoint)` Check if the supplied code point represents a valid local escaped character.
`static boolean`	`isNameChar(int codePoint)` Check if the supplied code point represents a valid name character.
`static boolean`	`isNameEndChar(int codePoint)` Check if the supplied code point represents a valid name end character.
`static boolean`	`isNameStartChar(int codePoint)` Check if the supplied code point represents a valid name start character.
`static boolean`	`isPERCENT(String name)`
`static boolean`	`isPLX_INTERNAL(String name)`
`static boolean`	`isPLX_START(String name)`
`static boolean`	`isPN_CHARS_BASE(int codePoint)` Check if the supplied code point represents a valid prefixed name base character.
`static boolean`	`isPN_CHARS_U(int codePoint)` Check if the supplied code point represents either a valid prefixed name base character or an underscore.
`static boolean`	`isPN_CHARS(int codePoint)` Check if the supplied code point represents a valid prefixed name character.
`static boolean`	`isPN_LOCAL_ESC(String name)`
`static boolean`	`isPN_LOCAL(String name)`
`static boolean`	`isPN_PREFIX(String prefix)` Checks if the supplied prefix string is a valid Turtle namespace prefix.
`static boolean`	`isPrefixChar(int codePoint)` Check if the supplied code point represents a valid prefix character.
`static boolean`	`isPrefixStartChar(int codePoint)` Check if the supplied code point represents a valid prefixed name start character.
`static boolean`	`isWhitespace(int codePoint)` Check if the supplied code point represents a whitespace character

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 codePoint)
```
    Check if the supplied code point represents a whitespace character
    
    Parameters:
    
    codePoint - a Unicode code point
    
    Returns:
    
    true iff the supplied code point represents a whitespace character, false otherwise.
  - isPN_CHARS_BASE
```
public static boolean isPN_CHARS_BASE(int codePoint)
```
    Check if the supplied code point represents a valid prefixed name base character.
    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]
  - isPN_CHARS_U
```
public static boolean isPN_CHARS_U(int codePoint)
```
    Check if the supplied code point represents either a valid prefixed name base character or an underscore.
    From Turtle Spec:
    http://www.w3.org/TR/turtle/#grammar-production-PN_CHARS_U
    [164s] PN_CHARS_U ::= PN_CHARS_BASE | '_'
  - isPN_CHARS
```
public static boolean isPN_CHARS(int codePoint)
```
    Check if the supplied code point represents a valid prefixed name character.
    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]
  - isPrefixStartChar
```
public static boolean isPrefixStartChar(int codePoint)
```
    Check if the supplied code point represents a valid prefixed name start character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid prefixed name start char, false otherwise.
  - isBLANK_NODE_LABEL_StartChar
```
public static boolean isBLANK_NODE_LABEL_StartChar(int codePoint)
```
    Check if the supplied code point represents a valid start character for a blank node label.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid blank node label start char, false otherwise.
  - isBLANK_NODE_LABEL_Char
```
public static boolean isBLANK_NODE_LABEL_Char(int codePoint)
```
    Check if the supplied code point represents a valid blank node label character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid blank node label char, false otherwise.
  - isBLANK_NODE_LABEL_EndChar
```
public static boolean isBLANK_NODE_LABEL_EndChar(int codePoint)
```
    Check if the supplied code point represents a valid blank node label end character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid blank node label end char, false otherwise.
  - isNameStartChar
```
public static boolean isNameStartChar(int codePoint)
```
    Check if the supplied code point represents a valid name start character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid name start char, false otherwise.
  - isNameChar
```
public static boolean isNameChar(int codePoint)
```
    Check if the supplied code point represents a valid name character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid name char, false otherwise.
  - isNameEndChar
```
public static boolean isNameEndChar(int codePoint)
```
    Check if the supplied code point represents a valid name end character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid name end char, false otherwise.
  - isLocalEscapedChar
```
public static boolean isLocalEscapedChar(int codePoint)
```
    Check if the supplied code point represents a valid local escaped character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid local escaped char, false otherwise.
  - isPrefixChar
```
public static boolean isPrefixChar(int codePoint)
```
    Check if the supplied code point represents a valid prefix character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid prefix char, false otherwise.
  - isLanguageStartChar
```
public static boolean isLanguageStartChar(int codePoint)
```
    Check if the supplied code point represents a valid language tag start character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid language tag start char, false otherwise.
  - isLanguageChar
```
public static boolean isLanguageChar(int codePoint)
```
    Check if the supplied code point represents a valid language tag character.
    
    Parameters:
    
    codePoint - a Unicode code point.
    
    Returns:
    
    true iff the supplied code point represents a valid language tag char, false otherwise.
  - isPN_PREFIX
```
public static boolean isPN_PREFIX(String prefix)
```
    Checks if the supplied prefix string is a valid Turtle namespace 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 - a prefix string.
    
    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)
```
  - 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.

Class TurtleUtil

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

LOCAL_ESCAPED_CHARS

Constructor Detail

TurtleUtil

Method Detail

findURISplitIndex

isWhitespace

isPN_CHARS_BASE

isPN_CHARS_U

isPN_CHARS

isPrefixStartChar

isBLANK_NODE_LABEL_StartChar

isBLANK_NODE_LABEL_Char

isBLANK_NODE_LABEL_EndChar

isNameStartChar

isNameChar

isNameEndChar

isLocalEscapedChar

isPrefixChar

isLanguageStartChar

isLanguageChar

isPN_PREFIX

isPLX_START

isPERCENT

isPLX_INTERNAL

isPN_LOCAL_ESC

isPN_LOCAL

encodeString

encodeLongString

encodeURIString

decodeString