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org.jdaemon.util.iterator
Class FilterIterator  

java.lang.Object
  org.jdaemon.util.iterator.FilterIterator

All Implemented Interfaces:

java.util.Iterator

Direct Known Subclasses:

ExcludeIterator

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public abstract class FilterIterator

extends java.lang.Object

implements java.util.Iterator

Iterator that returns subset of values from some other enumeration that match some predicate function (the 'filter')

Version:

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Field Summary
private  java.util.Iterator	enum           Superset enumeration
private  java.lang.Object	next           Lookahead object

 

Constructor Summary

FilterIterator(java.util.Iterator superset)           Creates new FilterIterator

 

Method Summary
abstract  boolean	filter(java.lang.Object obj)           This method should return true for any element we wish to include in the subset
boolean	hasNext()           True if more elements exist in filtered subset
private  void	moveNext()
java.lang.Object	next()           Get next element in filtered subset
void	remove()           Remove from the underlying collection the last element returned by next (optional operation).

 

Methods inherited from class java.lang.Object

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

 

Field Detail

enum

private java.util.Iterator enum

Superset enumeration

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next

private java.lang.Object next

Lookahead object

Constructor Detail

FilterIterator

public FilterIterator(java.util.Iterator superset)

Creates new FilterIterator

Method Detail

moveNext

private void moveNext()

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hasNext

public boolean hasNext()

True if more elements exist in filtered subset

Specified by:

hasNext in interface java.util.Iterator

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next

public java.lang.Object next()

Get next element in filtered subset

Specified by:

next in interface java.util.Iterator

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remove

public void remove()

Description copied from interface: java.util.Iterator

Remove from the underlying collection the last element returned by next (optional operation). This method can be called only once after each call to next(). It does not affect what will be returned by subsequent calls to next.

Specified by:

remove in interface java.util.Iterator

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filter

public abstract boolean filter(java.lang.Object obj)

This method should return true for any element we wish to include in the subset

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