org.eclipse.smila.importing.crawler.web
Class WebExtractorWorker

java.lang.Object
  org.eclipse.smila.importing.compounds.ExtractorWorkerBase
      org.eclipse.smila.importing.crawler.web.WebExtractorWorker

All Implemented Interfaces:

Worker

public class WebExtractorWorker
extends ExtractorWorkerBase

Compound extractor worker to use in web crawling workflows.

Field Summary

static java.lang.String

NAME name of worker.

Constructor Summary

WebExtractorWorker()

Method Summary

protected Record	convertRecord(Record compoundRecord, Record extractedRecord, TaskContext taskContext) create a record from the extracted record that conforms to the records produced by the matching crawler.
protected boolean	filterRecord(Record record, TaskContext taskContext) Filters applied to extracted records: urlPatterns (to the name of the extracted file).
protected ContentFetcher	getContentFetcher() get a content fetcher for the data source type.
java.lang.String	getName()
protected java.util.Iterator<Record>	invokeExtractor(CompoundExtractor extractor, Record compoundRecord, java.io.InputStream compoundContent, TaskContext taskContext) invoke extractor with data from the crawled record.
protected void	mapRecord(Record record, TaskContext taskContext) Hook for subclasses to support mapping of the converted record according to mapping rules.
void	setFetcher(Fetcher fetcher) DS service reference injection method.
void	unsetFetcher(Fetcher fetcher) DS service reference removal method.

Methods inherited from class org.eclipse.smila.importing.compounds.ExtractorWorkerBase

concatAttributeValues, copyAttachment, copyAttribute, copyCompoundAttributes, copySetToStringAttribute, perform, setCompoundExtractor, unsetCompoundExtractor

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final java.lang.String NAME

name of worker.

See Also:

Constant Field Values

Constructor Detail

WebExtractorWorker

public WebExtractorWorker()

Method Detail

getName

public java.lang.String getName()

Returns:

the name of the worker. The worker function will be executed for tasks tied to this worker name.

invokeExtractor

protected java.util.Iterator<Record> invokeExtractor(CompoundExtractor extractor,
                                                     Record compoundRecord,
                                                     java.io.InputStream compoundContent,
                                                     TaskContext taskContext)
                                              throws CompoundExtractorException

invoke extractor with data from the crawled record.

Specified by:

invokeExtractor in class ExtractorWorkerBase

Throws:

CompoundExtractorException

convertRecord

protected Record convertRecord(Record compoundRecord,
                               Record extractedRecord,
                               TaskContext taskContext)

create a record from the extracted record that conforms to the records produced by the matching crawler.

Specified by:

convertRecord in class ExtractorWorkerBase

filterRecord

protected boolean filterRecord(Record record,
                               TaskContext taskContext)

Filters applied to extracted records:

• urlPatterns (to the name of the extracted file).

Overrides:

filterRecord in class ExtractorWorkerBase

Parameters:

record - the record to check

taskContext - the task context containing the task parameters

Returns:

true if the record passes the filter(s), false if not.

mapRecord

protected void mapRecord(Record record,
                         TaskContext taskContext)

Hook for subclasses to support mapping of the converted record according to mapping rules.

Overrides:

mapRecord in class ExtractorWorkerBase

Parameters:

record - the Record

taskContext - the TaskContext

getContentFetcher

protected ContentFetcher getContentFetcher()

get a content fetcher for the data source type.

Specified by:

getContentFetcher in class ExtractorWorkerBase

setFetcher

public void setFetcher(Fetcher fetcher)

DS service reference injection method.

unsetFetcher

public void unsetFetcher(Fetcher fetcher)

DS service reference removal method.