org.apache.nutch.parse.js
Class JSParseFilter

java.lang.Object
  org.apache.nutch.parse.js.JSParseFilter

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, ParseFilter, Parser, FieldPluggable, Pluggable

public class JSParseFilter
extends Object
implements ParseFilter, Parser

This class is a heuristic link extractor for JavaScript files and code snippets. The general idea of a two-pass regex matching comes from Heritrix. Parts of the code come from OutlinkExtractor.java by Stephan Strittmatter.

Author:

Andrzej Bialecki <ab@getopt.org>

Field Summary

static org.slf4j.Logger

LOG

Fields inherited from interface org.apache.nutch.parse.ParseFilter

X_POINT_ID

Fields inherited from interface org.apache.nutch.parse.Parser

X_POINT_ID

Constructor Summary

JSParseFilter()

Method Summary

Parse	filter(String url, WebPage page, Parse parse, HTMLMetaTags metaTags, DocumentFragment doc) Scan the JavaScript looking for possible Outlink's
org.apache.hadoop.conf.Configuration	getConf() Get the Configuration object
Collection<WebPage.Field>	getFields() Gets all the fields for a given WebPage Many datastores need to setup the mapreduce job by specifying the fields needed.
Parse	getParse(String url, WebPage page) Set the Configuration object
static void	main(String[] args) Main method which can be run from command line with the plugin option.
void	setConf(org.apache.hadoop.conf.Configuration conf) Set the Configuration object

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

JSParseFilter

public JSParseFilter()

Method Detail

filter

public Parse filter(String url,
                    WebPage page,
                    Parse parse,
                    HTMLMetaTags metaTags,
                    DocumentFragment doc)

Scan the JavaScript looking for possible Outlink's

Specified by:

filter in interface ParseFilter

Parameters:

url - URL of the WebPage to be parsed

page - WebPage object relative to the URL

parse - Parse object holding parse status

metatags - within the NutchDocument

doc - The NutchDocument object

Returns:

parse the actual Parse object

getParse

public Parse getParse(String url,
                      WebPage page)

Set the Configuration object

Specified by:

getParse in interface Parser

Parameters:

url - URL of the WebPage which is parsed

page - WebPage object relative to the URL

Returns:

parse the actual Parse object

main

public static void main(String[] args)
                 throws Exception

Main method which can be run from command line with the plugin option. The method takes two arguments e.g. o.a.n.parse.js.JSParseFilter file.js baseURL

Parameters:

args -

Throws:

Exception

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Set the Configuration object

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

getConf

public org.apache.hadoop.conf.Configuration getConf()

Get the Configuration object

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable

getFields

public Collection<WebPage.Field> getFields()

Gets all the fields for a given WebPage Many datastores need to setup the mapreduce job by specifying the fields needed. All extensions that work on WebPage are able to specify what fields they need.

Specified by:

getFields in interface FieldPluggable