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Java Source Code / Java Documentation » Development » jga Generic Algorithms » net.sf.jga.fn.algorithm 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


net.sf.jga.fn.algorithm.FindMismatch

FindMismatch
public class FindMismatch extends LookAheadFunctor (Code)
Locates the next element in an iteration that is not equal to the corresponding element in a given collection.

To Serialize a FindMismatch, the generic parameter T must be serializable.

Copyright © 2003-2005 David A. Hall
author:
   David A. Hall


Inner Class :public interface Visitor extends net.sf.jga.fn.Visitor

Field Summary
final static  longserialVersionUID
    

Constructor Summary
public  FindMismatch(Collection<? extends T> elements)
     Builds a FindMismatch functor that uses !equals() to compare elements.
public  FindMismatch(Collection<? extends T> elements, BinaryFunctor<T, T, Boolean> neq)
     Builds a FindMismatch functor that uses the given functor to compare elements.
public  FindMismatch(Iterator<? extends T> iter, BinaryFunctor<T, T, Boolean> neq)
     Builds one-time use FindMismatch finder that will test against the contents of an iteration rather than a collection.

Method Summary
public  voidaccept(net.sf.jga.fn.Visitor v)
     Calls the Visitor's visit(FindMismatch) method, if it implements the nested Visitor interface.
public  LookAheadIterator<T>fn(Iterator<? extends T> iterator)
     Locates the first/next element in an iteration that is not the same as the corresponding element in the given collection/iteration. an iterator whose next() [if it hasNext()] points to the nextelement in the iteration that does not match the corresponding element inthe given collection.
public  BinaryFunctor<T, T, Boolean>getComparisonFn()
    
public  Collection<? extends T>getElements()
     Returns the collection against which the argument will be compared.
public  TgetMismatchedElement()
     Returns the mismatched element in the given collection/iteration on the last call to fn().
public  StringtoString()
    

Field Detail
serialVersionUID
final static long serialVersionUID(Code)




Constructor Detail
FindMismatch
public FindMismatch(Collection<? extends T> elements)(Code)
Builds a FindMismatch functor that uses !equals() to compare elements. If the collection is null, an empty collection will be used for comparison.



FindMismatch
public FindMismatch(Collection<? extends T> elements, BinaryFunctor<T, T, Boolean> neq)(Code)
Builds a FindMismatch functor that uses the given functor to compare elements. The functor is expected to compare two arguments and return TRUE if they are not equal. If the collection is null, an empty collection will be used for comparison.



FindMismatch
public FindMismatch(Iterator<? extends T> iter, BinaryFunctor<T, T, Boolean> neq)(Code)
Builds one-time use FindMismatch finder that will test against the contents of an iteration rather than a collection. The functor is expected to compare two arguments and return TRUE if they are not equal.

A FindMismatch built this way cannot be used more than once as the contents of the iteration will be consumed in the first execution.





Method Detail
accept
public void accept(net.sf.jga.fn.Visitor v)(Code)
Calls the Visitor's visit(FindMismatch) method, if it implements the nested Visitor interface.



fn
public LookAheadIterator<T> fn(Iterator<? extends T> iterator)(Code)
Locates the first/next element in an iteration that is not the same as the corresponding element in the given collection/iteration. an iterator whose next() [if it hasNext()] points to the nextelement in the iteration that does not match the corresponding element inthe given collection. If no such element exists and the iteration islonger than the the given collection, then the returned iterator's next()points to the first element that does not exist in the given collection.If no mismatched element exists and the collection is at least as long asthe iteration, then the returned iterator's hasNext() will be false.



getComparisonFn
public BinaryFunctor<T, T, Boolean> getComparisonFn()(Code)
Returns the functor that is used to test matching elements



getElements
public Collection<? extends T> getElements()(Code)
Returns the collection against which the argument will be compared. When called on a FindMismatch built with an iteration rather than a collection, this method will return null



getMismatchedElement
public T getMismatchedElement()(Code)
Returns the mismatched element in the given collection/iteration on the last call to fn(). If the iterator passed to the last call to fn() had no mismatch for the length of the collection, then this method returns null.
throws:
  IllegalStateException - if called before a call to fn.



toString
public String toString()(Code)



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