org.jbind.util.collection
Class FilterIterator

java.lang.Object
  org.jbind.util.collection.FilterIterator

All Implemented Interfaces:

java.util.Iterator

public class FilterIterator

extends java.lang.Object

implements java.util.Iterator

Filters the objects of an iterator such that all returned objects obey a condition.

Usage example: Filter an iteration of strings such that only strings with a lenght greater than 3 are returned:

for (Iterator i = new FilterIterator(a.iterator(), new FilterIterator.ICondition() { public boolean evaluate(Object anObject) { return ((String)anObject).length() > 3; } }); i.hasNext(); ) { System.out.println(i.next()); }

Author:

Wachter

Nested Class Summary

static interface

FilterIterator.ICondition Interface which must be implemented in order to decide wheter objects should be included in the iteration or not.

Constructor Summary

FilterIterator(java.util.Iterator anIterator, FilterIterator.ICondition aCondition)
Constructs a FilterIterator, i.e.

Method Summary

boolean	hasNext()
java.lang.Object	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterIterator

public FilterIterator(java.util.Iterator anIterator,
                      FilterIterator.ICondition aCondition)

Constructs a FilterIterator, i.e. an iterator which returns only objects which obey a condition.

Parameters:

anIterator - The iterator that should be filtered.

aCondition - The condition to be checked.

Method Detail

next

public java.lang.Object next()

Specified by:

next in interface java.util.Iterator

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator

remove

public void remove()

Specified by:

remove in interface java.util.Iterator