org.restlet.ext.rdf.internal.ntriples

Class RdfNTriplesReader

java.lang.Object

org.restlet.ext.rdf.internal.RdfReader

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

Direct Known Subclasses:

RdfTurtleReader

public class RdfNTriplesReader
extends RdfReader

Handler of RDF content according to the N-Triples notation.

Author:

Thierry Boileau

Field Summary

Fields

Modifier and Type	Field and Description
int	EOF End of reading buffer marker.

Constructor Summary

Constructors

Constructor and Description
RdfNTriplesReader(Representation rdfRepresentation, GraphHandler graphHandler) Constructor.

Method Summary

Modifier and Type	Method and Description
protected void	consumeStatement() Discard all read characters until the end of the statement is reached (marked by a '.').
protected void	consumeWhiteSpaces() Discard all read characters.
protected void	discard() Discard all read characters.
protected char	getChar() Returns the current parsed character.
protected String	getCurrentToken() Returns the current token.
String	getParsingMessage() Returns a message describing the current state of the parsing process.
protected String	getParsingMessage(char[] buffer, int startTokenIndex, int scoutIndex) Returns a message describing the current state of the parsing process.
protected boolean	isAlphaNum(int c) Returns true if the given character is alphanumeric.
protected boolean	isDelimiter(int c) Returns true if the given character is a delimiter.
protected boolean	isEndOfFile(int c)
protected boolean	isWhiteSpace(int c) Returns true if the given character is a whitespace.
void	parse() Parses the current representation.
protected void	parseComment() Parses a comment.
protected void	parseStatement() Reads the current statement until its end, and parses it.
protected String	parseToken() Returns the value of the current token.
protected String	parseUri() Returns the value of the current URI.
protected int	step() Read a new character.
protected void	step(int n) Steps forward.
protected void	stepBack() Steps back of one step.
protected void	stepBack(int n) Steps back.

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

EOF

public final int EOF

End of reading buffer marker.

See Also:

Constant Field Values

Constructor Detail

RdfNTriplesReader

public RdfNTriplesReader(Representation rdfRepresentation,
                         GraphHandler graphHandler)
                  throws IOException

Constructor.

Parameters:

rdfRepresentation - The representation to read.

graphHandler - The graph handler invoked during the parsing.

Throws:

IOException

Method Detail

consumeStatement

protected void consumeStatement()
                         throws IOException

Discard all read characters until the end of the statement is reached (marked by a '.').

Throws:

IOException

consumeWhiteSpaces

protected void consumeWhiteSpaces()
                           throws IOException

Discard all read characters. A call to getCurrentToken will return a single character.

Throws:

IOException

discard

protected void discard()

Discard all read characters. A call to getCurrentToken will return a single character.

getChar

protected char getChar()

Returns the current parsed character.

Returns:

The current parsed character.

getCurrentToken

protected String getCurrentToken()

Returns the current token.

Returns:

The current token.

getParsingMessage

public String getParsingMessage()

Returns a message describing the current state of the parsing process.

Returns:

A message describing the current state of the parsing process.

getParsingMessage

protected String getParsingMessage(char[] buffer,
                                   int startTokenIndex,
                                   int scoutIndex)

Returns a message describing the current state of the parsing process.

Parameters:

buffer - The current buffer.

startTokenIndex - The start index of parsing.

scoutIndex - The index of the probable future token.

Returns:

isAlphaNum

protected boolean isAlphaNum(int c)

Returns true if the given character is alphanumeric.

Parameters:

c - The given character to check.

Returns:

true if the given character is alphanumeric.

isDelimiter

protected boolean isDelimiter(int c)

Returns true if the given character is a delimiter.

Parameters:

c - The given character to check.

Returns:

true if the given character is a delimiter.

isEndOfFile

protected boolean isEndOfFile(int c)

isWhiteSpace

protected boolean isWhiteSpace(int c)

Returns true if the given character is a whitespace.

Parameters:

c - The given character to check.

Returns:

true if the given character is a whitespace.

parse

public void parse()
           throws IOException

Parses the current representation.

Specified by:

parse in class RdfReader

Throws:

IOException

parseComment

protected void parseComment()
                     throws IOException

Parses a comment.

Throws:

IOException

parseStatement

protected void parseStatement()
                       throws IOException

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

Parameters:

context - The current context.

Throws:

IOException

parseToken

protected String parseToken()
                     throws IOException

Returns the value of the current token.

Returns:

The value of the current token.

Throws:

IOException

parseUri

protected String parseUri()
                   throws IOException

Returns the value of the current URI.

Returns:

The value of the current URI.

Throws:

IOException

step

protected int step()
            throws IOException

Read a new character.

Returns:

The new read character.

Throws:

IOException

step

protected void step(int n)
             throws IOException

Steps forward.

Parameters:

n - The number of steps to go forward.

Throws:

IOException

stepBack

protected void stepBack()

Steps back of one step.

stepBack

protected void stepBack(int n)

Steps back.

Parameters:

n - The number of steps to go back.