org.apache.commons.math.linear
Class AbstractRealVector.SparseEntryIterator

java.lang.Object
  org.apache.commons.math.linear.AbstractRealVector.SparseEntryIterator

All Implemented Interfaces:

Iterator<RealVector.Entry>

Enclosing class:

AbstractRealVector

protected class AbstractRealVector.SparseEntryIterator
extends Object
implements Iterator<RealVector.Entry>

This class should rare be used, but is here to provide a default implementation of sparseIterator(), which is implemented by walking over the entries, skipping those whose values are the default one. Concrete subclasses which are SparseVector implementations should make their own sparse iterator, not use this one. This implementation might be useful for ArrayRealVector, when expensive operations which preserve the default value are to be done on the entries, and the fraction of non-default values is small (i.e. someone took a SparseVector, and passed it into the copy-constructor of ArrayRealVector)

Constructor Summary

protected

AbstractRealVector.SparseEntryIterator() Simple constructor.

Method Summary

protected void	advance(AbstractRealVector.EntryImpl e) Advance an entry up to the next nonzero one.
boolean	hasNext()
RealVector.Entry	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractRealVector.SparseEntryIterator

protected AbstractRealVector.SparseEntryIterator()

Simple constructor.

Method Detail

advance

protected void advance(AbstractRealVector.EntryImpl e)

Advance an entry up to the next nonzero one.

Parameters:

e - entry to advance

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<RealVector.Entry>

next

public RealVector.Entry next()

Specified by:

next in interface Iterator<RealVector.Entry>

remove

public void remove()

Specified by:

remove in interface Iterator<RealVector.Entry>