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com.tangosol.util
Class PagedIterator

java.lang.Object
com.tangosol.util.Base
com.tangosol.util.PagedIterator

All Implemented Interfaces:

Iterator

public class PagedIterator

extends Base

implements Iterator

PagedIterator is an Iterator implementation based on a concept of a page Advancer - a pluggable component that knows how to supply a next page of objects to iterate through. As common to iterators, this implementation is not thread safe.

Since:

Coherence 3.4

Author:

gg 2008.01.25

Nested Class Summary

static interface

PagedIterator.Advancer Advancer is a pluggable component that knows how to load a new page (Collection) of objects to be used by the enclosing PagedIterator.

Field Summary

protected PagedIterator.Advancer	m_advancer The underlying Advancer.
protected Iterator	m_iterPage An Iterator for the current page.
protected Object	m_oCurr Currently "Active" object.

Constructor Summary

PagedIterator(PagedIterator.Advancer advancer)
Construct a PagedIterator based on the specified Advancer.

Method Summary

boolean	hasNext() Check whether or not the iterator has more elements.
Object	next() Return the next element in the iteration.
void	remove() Removes from the underlying collection the last element returned by the iterator.

Field Detail

m_advancer

protected PagedIterator.Advancer m_advancer

The underlying Advancer.

m_iterPage

protected Iterator m_iterPage

An Iterator for the current page.

m_oCurr

protected Object m_oCurr

Currently "Active" object.

Constructor Detail

PagedIterator

public PagedIterator(PagedIterator.Advancer advancer)

Construct a PagedIterator based on the specified Advancer.

Parameters:

advancer - the underlying Advancer

Method Detail

remove

public void remove()

Removes from the underlying collection the last element returned by the iterator. Removes from the underlying collection the last element returned by the iterator (optional operation). This method can be called only once per call to next. The behavior of an iterator is unspecified if the underlying collection is modified while the iteration is in progress in any way other than by calling this method.

Specified by:

remove in interface Iterator

hasNext

public boolean hasNext()

Check whether or not the iterator has more elements. Returns true if the iteration has more elements. (In other words, returns true if next would return an element rather than throwing an exception.)

Specified by:

hasNext in interface Iterator

Returns:

true if the iterator has more elements.

next

public Object next()

Return the next element in the iteration. Returns the next element in the iteration. Calling this method repeatedly until the Iterator.hasNext() method returns false will return each element in the underlying collection exactly once.

Specified by:

next in interface Iterator

Returns:

the next element in the iteration.

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