Class IteratorHelpers

java.lang.Object

com.ibm.j9ddr.util.IteratorHelpers

public class IteratorHelpers
extends Object

Utility functions for working with iterators

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	IteratorHelpers.IteratorFilter<T>	Interface for filtering iterators

Constructor Summary

Constructors

Constructor	Description
IteratorHelpers()

Method Summary

Modifier and Type	Method	Description
static <T> Iterator<T>	combineIterators(Iterator<T>... iterators)	Takes a list of iterators and returns one iterator that iterates over each iterator in turn.
static <T> Iterator<T>	filterIterator(Iterator<T> it, IteratorHelpers.IteratorFilter<T> filter)	Filters an iterator
static <T> List<T>	toList(Iterator<T> it)

Methods declared in class java.lang.Object

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

Constructor Details

IteratorHelpers

public IteratorHelpers()

Method Details

combineIterators

public static <T> Iterator<T> combineIterators(Iterator<T>... iterators)

Takes a list of iterators and returns one iterator that iterates over each iterator in turn.

toList

public static <T> List<T> toList(Iterator<T> it)

filterIterator

public static <T> Iterator<T> filterIterator(Iterator<T> it,
 IteratorHelpers.IteratorFilter<T> filter)

Filters an iterator

Type Parameters:

T - Generic type of iterator

Parameters:

it - Iterator to be filtered

filter - Filter object to select which objects to be passed through

Returns:

Filtered iterator