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org.apache.any23.extractor.rdf
Class BaseRDFExtractor

java.lang.Object
  org.apache.any23.extractor.rdf.BaseRDFExtractor

All Implemented Interfaces:

Extractor<InputStream>, Extractor.ContentExtractor

Direct Known Subclasses:

NQuadsExtractor, NTriplesExtractor, RDFXMLExtractor, TriXExtractor, TurtleExtractor

public abstract class BaseRDFExtractor
extends Object
implements Extractor.ContentExtractor

Base class for a generic RDF Extractor.ContentExtractor.

Author:

Michele Mostarda (mostarda@fbk.eu)

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.any23.extractor.Extractor

Extractor.BlindExtractor, Extractor.ContentExtractor, Extractor.TagSoupDOMExtractor

Constructor Summary

BaseRDFExtractor()

BaseRDFExtractor(boolean verifyDataType, boolean stopAtFirstError)
Constructor, allows to specify the validation and error handling policies.

Method Summary

abstract ExtractorDescription	getDescription() Returns a ExtractorDescription of this extractor.
protected abstract org.openrdf.rio.helpers.RDFParserBase	getParser(ExtractionContext extractionContext, ExtractionResult extractionResult)
boolean	isStopAtFirstError()
boolean	isVerifyDataType()
void	run(ExtractionParameters extractionParameters, ExtractionContext extractionContext, InputStream in, ExtractionResult extractionResult) Executes the extractor.
void	setStopAtFirstError(boolean b) If true, the extractor will stop at first parsing error, iffalse the extractor will attempt to ignore all parsing errors.
void	setVerifyDataType(boolean verifyDataType)

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseRDFExtractor

public BaseRDFExtractor(boolean verifyDataType,
                        boolean stopAtFirstError)

Constructor, allows to specify the validation and error handling policies.

Parameters:

verifyDataType - if true the data types will be verified, if false will be ignored.

stopAtFirstError - if true the parser will stop at first parsing error, if false will ignore non blocking errors.

BaseRDFExtractor

public BaseRDFExtractor()

Method Detail

getDescription

public abstract ExtractorDescription getDescription()

Description copied from interface: Extractor

Returns a ExtractorDescription of this extractor.

Specified by:

getDescription in interface Extractor<InputStream>

Returns:

the object representing the extractor description.

getParser

protected abstract org.openrdf.rio.helpers.RDFParserBase getParser(ExtractionContext extractionContext,
                                                                   ExtractionResult extractionResult)

isVerifyDataType

public boolean isVerifyDataType()

setVerifyDataType

public void setVerifyDataType(boolean verifyDataType)

isStopAtFirstError

public boolean isStopAtFirstError()

setStopAtFirstError

public void setStopAtFirstError(boolean b)

Description copied from interface: Extractor.ContentExtractor

If true, the extractor will stop at first parsing error, iffalse the extractor will attempt to ignore all parsing errors.

Specified by:

setStopAtFirstError in interface Extractor.ContentExtractor

Parameters:

b - tolerance flag.

run

public void run(ExtractionParameters extractionParameters,
                ExtractionContext extractionContext,
                InputStream in,
                ExtractionResult extractionResult)
         throws IOException,
                ExtractionException

Description copied from interface: Extractor

Executes the extractor. Will be invoked only once, extractors are not reusable.

Specified by:

run in interface Extractor<InputStream>

Parameters:

extractionParameters - the parameters to be applied during the extraction.

extractionContext - The document context.

in - The extractor input data.

extractionResult - the collector for the extracted data.

Throws:

IOException - On error while reading from the input stream.

ExtractionException - On other error, such as parse errors.