Module openj9.dtfj

Package com.ibm.j9ddr.util

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