Package com.stardog.stark.io

Class IOParserContext

java.lang.Object

com.stardog.stark.io.AbstractRDFHandler

com.stardog.stark.io.ParserContext

com.stardog.stark.io.IOParserContext

All Implemented Interfaces:

RDFHandler

Direct Known Subclasses:

LineSupplierParserContext, TurtleParserContext

public class IOParserContext
extends ParserContext

Extended parser state that wraps the stream to be parsed to provide common IO operations for most of the basic text RDF formats.

Since:

1.0

Version:

1.0

Author:

Michael Grove, Arjohn Kampman

Nested Class Summary

Nested classes/interfaces inherited from class com.stardog.stark.io.ParserContext

ParserContext.ParseError

Field Summary

Fields inherited from class com.stardog.stark.io.ParserContext

BNODE_ID_PREFIX, caseInsensitiveDirectives, mBaseIRI, mColumnNumber, mContext, mLineNumber, mNamespaces, mObject, mPredicate, mSubject

Constructor Summary

Constructors

Constructor	Description
IOParserContext(Reader theReader, RDFHandler theHandler, Options theOptions)

Method Summary

Modifier and Type	Method	Description
StringBuilder	datatypeBuffer()	Reset the buffer for parsing datatypes and return it
StringBuilder	langBuffer()	Rest the buffer that can be used for parsing language tags and return it
int	peekCodePoint()	Peeks at the next Unicode code point without advancing the reader, and returns its value.
int	readCodePoint()	Reads the next Unicode code point.
StringBuilder	resetSB()
StringBuilder	trimSB()
void	unread(int theCodePoint)	Pushes back a single code point by copying it to the front of the buffer.
void	unread(String theStr)	Pushes back the supplied string by copying it to the front of the buffer.
int	verifyCharacterOrFail(char expected)
int	verifyCharacterOrFail(int codePoint, String expected)
int	verifyCharacterOrFail(String expected)	Verifies that the supplied character code point codePoint is one of the expected characters specified in expected.

Methods inherited from class com.stardog.stark.io.ParserContext

createBNode, createBNode, createLiteral, currentStatement, end, error, error, getRandomBnodeIdPrefix, handle, is, namespace, namespace, reportStatement, resetStatement, resolveURI, start

Methods inherited from class java.lang.Object

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

Constructor Details

IOParserContext

public IOParserContext(@Nonnull
 Reader theReader,
 @Nonnull
 RDFHandler theHandler,
 @Nonnull
 Options theOptions)

Method Details

langBuffer

public StringBuilder langBuffer()

Rest the buffer that can be used for parsing language tags and return it

Returns:

the buffer

datatypeBuffer

public StringBuilder datatypeBuffer()

Reset the buffer for parsing datatypes and return it

Returns:

the buffer

resetSB

public StringBuilder resetSB()

trimSB

public StringBuilder trimSB()

peekCodePoint

public int peekCodePoint()
                  throws IOException

Peeks at the next Unicode code point without advancing the reader, and returns its value.

Returns:

the next Unicode code point, or -1 if the end of the stream has been reached.

Throws:

IOException

readCodePoint

public int readCodePoint()
                  throws IOException

Reads the next Unicode code point.

Returns:

the next Unicode code point, or -1 if the end of the stream has been reached.

Throws:

IOException

unread

public void unread(int theCodePoint)
            throws IOException

Pushes back a single code point by copying it to the front of the buffer. After this method returns, a call to readCodePoint() will return the same code point c again.

Parameters:

theCodePoint - a single Unicode code point.

Throws:

IOException

unread

public void unread(@Nonnull
 String theStr)

Pushes back the supplied string by copying it to the front of the buffer. After this method returns, successive calls to readCodePoint() will return the code points in the supplied string again, starting at the first in the String..

Parameters:

theStr - the string to un-read.

Throws:

UncheckedIOException

verifyCharacterOrFail

public int verifyCharacterOrFail(@Nonnull
 String expected)
                          throws IOException

Verifies that the supplied character code point codePoint is one of the expected characters specified in expected. This method will throw a ParseException if this is not the case.

Throws:

IOException

verifyCharacterOrFail

public int verifyCharacterOrFail(@Nonnull
 char expected)
                          throws IOException

Throws:

IOException

verifyCharacterOrFail

public int verifyCharacterOrFail(int codePoint,
 @Nonnull
 String expected)
                          throws InvalidRDF

Throws:

InvalidRDF