Package org.restlet.ext.rdf.internal.turtle

Class RdfTurtleReader

java.lang.Object

org.restlet.ext.rdf.internal.RdfReader

org.restlet.ext.rdf.internal.ntriples.RdfNTriplesReader

org.restlet.ext.rdf.internal.turtle.RdfTurtleReader

Direct Known Subclasses:

RdfN3Reader

public class RdfTurtleReader
extends RdfNTriplesReader

Handler of RDF content according to the RDF Turtle notation.

Field Summary

Fields

Modifier and Type	Field	Description
private int	blankNodeId	Increment used to identify inner blank nodes.
private Context	context	The current context object.

Fields inherited from class org.restlet.ext.rdf.internal.ntriples.RdfNTriplesReader

EOF

Constructor Summary

Constructors

Constructor	Description
RdfTurtleReader(Representation rdfN3Representation, GraphHandler graphHandler)	Constructor.

Method Summary

Modifier and Type	Method	Description
protected void	generateLinks(java.util.List<LexicalUnit> lexicalUnits)	Loops over the given list of lexical units and generates the adequat calls to link* methods.
protected Context	getContext()	Returns the current context.
private Reference	getPredicate(LexicalUnit lexicalUnit)	Returns the given lexical unit as a predicate.
protected boolean	isDelimiter(int c)	Returns true if the given character is a delimiter.
protected void	link(java.lang.Object source, Reference typeRef, java.lang.Object target)	Callback method used when a link is parsed or written.
protected java.lang.String	newBlankNodeId()	Returns the identifier of a new blank node.
void	parse()	Parses the current representation.
protected void	parseBlankNode(BlankNodeToken blankNode)	Parse the given blank node.
protected void	parseDirective(Context context)	Parse the current directive and update the context according to the kind of directive ("base", "prefix", etc).
protected void	parseList(ListToken listToken)	Parse the given list token.
protected void	parseStatement(Context context)	Reads the current statement until its end, and parses it.
protected void	parseString(StringToken stringToken)	Parse the given String token.
protected void	parseToken(Token token)	Parses the given token.
protected void	parseUri(UriToken uriToken)	Parses the given URI token.

Methods inherited from class org.restlet.ext.rdf.internal.ntriples.RdfNTriplesReader

consumeStatement, consumeWhiteSpaces, discard, getChar, getCurrentToken, getParsingMessage, getParsingMessage, isAlphaNum, isEndOfFile, isWhiteSpace, parseComment, parseStatement, parseToken, parseUri, step, step, stepBack, stepBack

Methods inherited from class org.restlet.ext.rdf.internal.RdfReader

getGraphHandler, getRdfRepresentation

Methods inherited from class java.lang.Object

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

Field Detail

blankNodeId

private int blankNodeId

Increment used to identify inner blank nodes.

context

private Context context

The current context object.

Constructor Detail

RdfTurtleReader

public RdfTurtleReader(Representation rdfN3Representation,
                       GraphHandler graphHandler)
                throws java.io.IOException

Constructor.

Parameters:

rdfRepresentation - The representation to read.

graphHandler - The graph handler invoked during the parsing.

Throws:

java.io.IOException

Method Detail

generateLinks

protected void generateLinks(java.util.List<LexicalUnit> lexicalUnits)

Loops over the given list of lexical units and generates the adequat calls to link* methods.

Parameters:

lexicalUnits - The list of lexical units used to generate the links.

See Also:

GraphHandler.link(Graph, Reference, Reference), GraphHandler.link(Reference, Reference, Literal), GraphHandler.link(Reference, Reference, Reference)

getContext

protected Context getContext()

Returns the current context.

Returns:

The current context.

getPredicate

private Reference getPredicate(LexicalUnit lexicalUnit)

Returns the given lexical unit as a predicate.

Parameters:

lexicalUnit - The lexical unit to get as a predicate.

Returns:

A RDF URI reference of the predicate.

isDelimiter

protected boolean isDelimiter(int c)

Returns true if the given character is a delimiter.

Overrides:

isDelimiter in class RdfNTriplesReader

Parameters:

c - The given character to check.

Returns:

true if the given character is a delimiter.

link

protected void link(java.lang.Object source,
                    Reference typeRef,
                    java.lang.Object target)

Callback method used when a link is parsed or written.

Parameters:

source - The source or subject of the link.

typeRef - The type reference of the link.

target - The target or object of the link.

newBlankNodeId

protected java.lang.String newBlankNodeId()

Returns the identifier of a new blank node.

Returns:

The identifier of a new blank node.

parse

public void parse()
           throws java.io.IOException

Parses the current representation.

Overrides:

parse in class RdfNTriplesReader

Throws:

java.io.IOException

parseBlankNode

protected void parseBlankNode(BlankNodeToken blankNode)
                       throws java.io.IOException

Parse the given blank node.

Parameters:

blankNode - The blank node to parse.

Throws:

java.io.IOException

parseDirective

protected void parseDirective(Context context)
                       throws java.io.IOException

Parse the current directive and update the context according to the kind of directive ("base", "prefix", etc).

Parameters:

context - The context to update.

Throws:

java.io.IOException

parseList

protected void parseList(ListToken listToken)
                  throws java.io.IOException

Parse the given list token.

Parameters:

listToken - The list token to parse.

Throws:

java.io.IOException

parseStatement

protected void parseStatement(Context context)
                       throws java.io.IOException

Reads the current statement until its end, and parses it.

Parameters:

context - The current context.

Throws:

java.io.IOException

parseString

protected void parseString(StringToken stringToken)
                    throws java.io.IOException

Parse the given String token.

Parameters:

stringToken - The String token to parse.

Throws:

java.io.IOException

parseToken

protected void parseToken(Token token)
                   throws java.io.IOException

Parses the given token.

Parameters:

token - The token to parse.

Throws:

java.io.IOException

parseUri

protected void parseUri(UriToken uriToken)
                 throws java.io.IOException

Parses the given URI token.

Parameters:

token - The URI token to parse.

Throws:

java.io.IOException