edu.washington.cs.knowitall.extractor.mapper
Class Mapper<T>

java.lang.Object
  edu.washington.cs.knowitall.extractor.mapper.Mapper<T>

Type Parameters:

T -

Direct Known Subclasses:

FilterMapper, IndependentMapper, MapperList, MaxMapper, MergeOverlappingMapper

public abstract class Mapper<T>
extends Object

A class for taking a stream of T objects and modifying it somehow (e.g. by filtering or modifying some objects). A Mapper object has two states: enabled and disabled. If the Mapper is disabled, it will return the stream of objects unmodified. Subclasses extending Mapper should implement the doMap(Iterable objects) method.

Author:

afader

Constructor Summary

Mapper()

Method Summary

void	disable() Disables this mapper.
protected abstract Iterable<T>	doMap(Iterable<T> objects)
void	enable() Enables this mapper.
boolean	isEnabled()
Iterable<T>	map(Iterable<T> objects)

Methods inherited from class java.lang.Object

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

Constructor Detail

Mapper

public Mapper()

Method Detail

doMap

protected abstract Iterable<T> doMap(Iterable<T> objects)

Parameters:

objects - a stream of objects

Returns:

a modified stream of objects

map

public Iterable<T> map(Iterable<T> objects)

Parameters:

objects - a stream of objects

Returns:

a modified stream of objects if the mapper is enabled, the unmodified input stream otherwise.

isEnabled

public boolean isEnabled()

Returns:

true if this mapper is enabled.

disable

public void disable()

Disables this mapper.

enable

public void enable()

Enables this mapper.