de.unidu.is.text
Class CounterFilter

java.lang.Object
  de.unidu.is.text.CounterFilter

All Implemented Interfaces:

Filter

public class CounterFilter

extends java.lang.Object

implements Filter

This filter counts occurences of objects, and returns a list of object-frequency pairs.

Since:

2003-09-11

Version:

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

Author:

Henrik Nottelmann

Constructor Summary

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

Method Summary

java.util.Iterator	apply(java.util.Iterator iterator) Applies this filter on each object returned by the specified iterator.
java.util.Iterator	apply(java.lang.Object seed) Applies this filter on the specified single object.

Methods inherited from class java.lang.Object

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

Constructor Detail

CounterFilter

public CounterFilter(Filter nextFilter)

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

Parameters:

nextFilter - next filter in the filter chain

Method Detail

apply

public java.util.Iterator apply(java.lang.Object seed)

Applies this filter on the specified single object.

Specified by:

apply in interface Filter

Parameters:

seed - object on which the filter is applied

Returns:

iterator over the resulting objects

See Also:

Filter.apply(java.lang.Object)

apply

public java.util.Iterator apply(java.util.Iterator iterator)

Applies this filter on each object returned by the specified iterator.

This method first calls the next filter in the filter chain (if existing), and then applies this filter on the specified iterator.

Specified by:

apply in interface Filter

Parameters:

iterator - iterator over objects on which the filter is applied

Returns:

iterator over the resulting objects

See Also:

Filter.apply(java.util.Iterator)