edu.umd.cfar.lamp.viper.util
Class MappingIterator

java.lang.Object
  edu.umd.cfar.lamp.viper.util.MappingIterator

All Implemented Interfaces:

java.util.Iterator

public class MappingIterator

extends java.lang.Object

implements java.util.Iterator

Wraps an Iterator to return the given values after having been run through a 'map' function.

Nested Class Summary

static interface

MappingIterator.MappingFunctor Function object for converting from the domain to range of the map relation.

Constructor Summary

MappingIterator(MappingIterator.MappingFunctor map, java.util.Iterator i)
Creates a new instance of ExceptIterator.

Method Summary

boolean	hasNext() Tests to see if another element matching the criteria exists in the iterator.
java.lang.Object	next() Gets the next object corresponding to the next element of the wrapped iterator.
void	remove() This must be called directly after the call to next - calling hasNext may call next() on the underlying iterator.

Methods inherited from class java.lang.Object

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

Constructor Detail

MappingIterator

public MappingIterator(MappingIterator.MappingFunctor map,
                       java.util.Iterator i)

Creates a new instance of ExceptIterator.

Parameters:

i - the iterator to wrap

Method Detail

hasNext

public boolean hasNext()

Tests to see if another element matching the criteria exists in the iterator.

Specified by:

hasNext in interface java.util.Iterator

Returns:

true if hasNext will return an element

next

public java.lang.Object next()

Gets the next object corresponding to the next element of the wrapped iterator.

Specified by:

next in interface java.util.Iterator

Returns:

the next mapped element

Throws:

java.util.NoSuchElementException - if no element remains that matches

remove

public void remove()

This must be called directly after the call to next - calling hasNext may call next() on the underlying iterator.

Specified by:

remove in interface java.util.Iterator

Throws:

java.lang.UnsupportedOperationException - if the underlying iterator doesn't support removal

java.lang.IllegalStateException - when invoked after a call to hasNext(), before a call to next(), or after another call to remove