net.sf.jga.fn.algorithm
Class FindIteratorFunctor<T>

java.lang.Object
  net.sf.jga.fn.UnaryFunctor<java.util.Iterator<? extends T>,FindIterator<T>>
      net.sf.jga.fn.algorithm.FindIteratorFunctor<T>

All Implemented Interfaces:

java.io.Serializable, Visitable

Direct Known Subclasses:

Find, FindElement

public abstract class FindIteratorFunctor<T>
extends UnaryFunctor<java.util.Iterator<? extends T>,FindIterator<T>>

Abstract base class for functors that take an input iterator and return a FindIterator. This class provides the ability to prevent excessive iterator wrapping by tracking the identity of the functor that has produced the wrapped iterator, and not re-wrapping an iterator if it was produced by the same object that is currently requesting a wrapped iterator.

Copyright © 2004 David A. Hall

Author:

David A. Hall

See Also:

Serialized Form

Constructor Summary

FindIteratorFunctor()

Method Summary

protected FindIterator<T>

wrap(java.util.Iterator<? extends T> iterator) Conditionally wraps the input iterator in a FindIterator for return.

Methods inherited from class net.sf.jga.fn.UnaryFunctor

accept, bind, compose, compose, fn, generate

Methods inherited from class java.lang.Object

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

Constructor Detail

FindIteratorFunctor

public FindIteratorFunctor()

Method Detail

wrap

protected FindIterator<T> wrap(java.util.Iterator<? extends T> iterator)

Conditionally wraps the input iterator in a FindIterator for return. Uses a Wrapper to determine if the input iterator is one that this object has already built and returned: if so, then there is no need to wrap it again.