de.unidu.is.text
Class AbstractSingleItemFilter

java.lang.Object
  de.unidu.is.text.AbstractFilter
      de.unidu.is.text.AbstractSingleItemFilter

All Implemented Interfaces:

Filter, SingleItemFilter

Direct Known Subclasses:

CodecSoundexFilter, GermanStemmerFilter, HTMLFilter, LowercaseFilter, SoundexFilter, StemmerFilter, StopwordFilter, UntagFilter

public abstract class AbstractSingleItemFilter

extends AbstractFilter

implements SingleItemFilter

This is an abstract filter implementation which converts every object into exactly one object (or into null), and which allows for chaining filters.

Subclasses have to implement the actual filtering method.

Since:

2003-07-04

Version:

$Revision: 1.6 $, $Date: 2005/02/21 17:29:28 $

Author:

Henrik Nottelmann

Field Summary

Fields inherited from class de.unidu.is.text.AbstractFilter

nextFilter

Constructor Summary

AbstractSingleItemFilter(Filter nextFilter)
Creates a new instance and sets the next filter in the chain.

Method Summary

protected java.util.Iterator

filter(java.lang.Object value) Applies only this filter on the specified object, without considering the other filters from the filter chain.

Methods inherited from class de.unidu.is.text.AbstractFilter

apply, apply

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.unidu.is.text.SingleItemFilter

run

Constructor Detail

AbstractSingleItemFilter

public AbstractSingleItemFilter(Filter nextFilter)

Creates a new instance and sets the next filter in the chain.

Parameters:

nextFilter - next filter in the filter chain

Method Detail

filter

protected java.util.Iterator filter(java.lang.Object value)

Applies only this filter on the specified object, without considering the other filters from the filter chain.

This method applies run(String) on the specified object, and then returns a SingleItemIterator returning the resulting object. If run(String) returns null, a is returned.

Specified by:

filter in class AbstractFilter

Parameters:

value - value to be modified by this filter

Returns:

iterator over the resulting objects

See Also:

AbstractFilter.filter(java.lang.Object)