org.jwall.web.audit.rules

Class ValueExtractor

java.lang.Object

org.jwall.web.audit.rules.ValueExtractor

All Implemented Interfaces:

FeatureExtractor<AuditEvent,List<String>>

public class ValueExtractor
extends Object
implements FeatureExtractor<AuditEvent,List<String>>

This class extracts the values for the given variable for an event.

Author:

Christian Bockermann <chris@jwall.org>

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ValueExtractor() Create a new extractor and initialize the available variables.

Method Summary

Methods

Modifier and Type	Method and Description
List<String>	extract(String var, AuditEvent evt) Extract all values for the specified feature from the given event.
static List<String>	extractValues(String variable, AuditEvent evt)
static List<String>	extractValues(String variable, stream.Data item)
Set<String>	getVariables(AuditEvent event) This method extracts all available feature names for the given event.
void	registerExtractor(String name, FeatureExtractor<AuditEvent,?> extr)

Methods inherited from class java.lang.Object

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

Constructor Detail

ValueExtractor

protected ValueExtractor()

Create a new extractor and initialize the available variables.

Method Detail

registerExtractor

public void registerExtractor(String name,
                     FeatureExtractor<AuditEvent,?> extr)

getVariables

public Set<String> getVariables(AuditEvent event)

Description copied from interface: FeatureExtractor

This method extracts all available feature names for the given event.

Specified by:

getVariables in interface FeatureExtractor<AuditEvent,List<String>>

Returns:

See Also:

FeatureExtractor.getVariables(org.jwall.audit.Event)

extract

public List<String> extract(String var,
                   AuditEvent evt)

Description copied from interface: FeatureExtractor

Extract all values for the specified feature from the given event.

Specified by:

extract in interface FeatureExtractor<AuditEvent,List<String>>

Returns:

See Also:

FeatureExtractor.extract(java.lang.String, org.jwall.audit.Event)

extractValues

public static List<String> extractValues(String variable,
                         AuditEvent evt)

extractValues

public static List<String> extractValues(String variable,
                         stream.Data item)