Package org.apache.nutch.indexer.metadata

Class MetadataIndexer

java.lang.Object

org.apache.nutch.indexer.metadata.MetadataIndexer

All Implemented Interfaces:

Configurable, IndexingFilter, Pluggable

public class MetadataIndexer
extends Object
implements IndexingFilter

Indexer which can be configured to extract metadata from the crawldb, parse metadata or content metadata. You can specify the properties "index.db.md", "index.parse.md" or "index.content.md" who's values are comma-delimited key1,key2,key3.

Field Summary

Fields inherited from interface org.apache.nutch.indexer.IndexingFilter

X_POINT_ID

Constructor Summary

Constructors

Constructor	Description
MetadataIndexer()

Method Summary

Modifier and Type	Method	Description
protected void	add(NutchDocument doc, String key, String value)
NutchDocument	filter(NutchDocument doc, Parse parse, Text url, CrawlDatum datum, Inlinks inlinks)	Adds fields or otherwise modifies the document that will be indexed for a parse.
Configuration	getConf()
void	setConf(Configuration conf)

Methods inherited from class java.lang.Object

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

Constructor Detail

MetadataIndexer

public MetadataIndexer()

Method Detail

filter

public NutchDocument filter(NutchDocument doc,
                            Parse parse,
                            Text url,
                            CrawlDatum datum,
                            Inlinks inlinks)
                     throws IndexingException

Description copied from interface: IndexingFilter

Adds fields or otherwise modifies the document that will be indexed for a parse. Unwanted documents can be removed from indexing by returning a null value.

Specified by:

filter in interface IndexingFilter

Parameters:

doc - document instance for collecting fields

parse - parse data instance

url - page url

datum - crawl datum for the page (fetch datum from segment containing fetch status and fetch time)

inlinks - page inlinks

Returns:

modified (or a new) document instance, or null (meaning the document should be discarded)

Throws:

IndexingException - if an error occurs during during filtering

add

protected void add(NutchDocument doc,
                   String key,
                   String value)

setConf

public void setConf(Configuration conf)

Specified by:

setConf in interface Configurable

getConf

public Configuration getConf()

Specified by:

getConf in interface Configurable