io.datarouter.scanner

Class RandomAccessScanner<T>

java.lang.Object

io.datarouter.scanner.RandomAccessScanner<T>

All Implemented Interfaces:

Scanner<T>, Closeable, AutoCloseable

public class RandomAccessScanner<T>
extends Object
implements Scanner<T>

Avoid an intermediate Iterator when scanning a List with RandomAccess layout.

Constructor Summary

Constructors

Constructor and Description
RandomAccessScanner(List<T> list)

Method Summary

Modifier and Type	Method and Description
boolean	advance() Try to update current to the next item, if there is one.
T	current()
static <T> Scanner<T>	of(List<T> list) Convert an Object into a Scanner.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.datarouter.scanner.Scanner

advanceUntil, advanceWhile, allMatch, anyMatch, append, append, append, apply, batch, close, collate, collate, collect, collect, concat, concat, concat, concatIter, count, deduplicateConsecutive, deduplicateConsecutiveBy, distinct, distinctBy, each, empty, exclude, findFirst, findLast, findMax, findMin, flush, forEach, generate, groupBy, groupBy, groupBy, groupBy, hasAny, include, isEmpty, iterable, iterate, iterator, limit, link, list, listTo, map, maxN, minN, noneMatch, ofNullable, parallel, prefetch, reduce, reduce, retain, reverse, sample, shuffle, skip, sort, sort, splitBy, stream, streamDoubles, streamInts, streamLongs, take, then, toArray, toMap, toMap, toMap, toMap, toMap, toMapSupplied, toMapSupplied, toMapSupplied, toMapSupplied

Constructor Detail

RandomAccessScanner

public RandomAccessScanner(List<T> list)

Method Detail

of

public static <T> Scanner<T> of(List<T> list)

Description copied from interface: Scanner

Convert an Object into a Scanner.

Specified by:

of in interface Scanner<T>

Parameters:

list - A non-null Object

Returns:

A single-item Scanner with the Object

advance

public boolean advance()

Description copied from interface: Scanner

Try to update current to the next item, if there is one.

Specified by:

advance in interface Scanner<T>

Returns:

True if it advanced

current

public T current()

Specified by:

current in interface Scanner<T>

Returns:

The current item, only valid if advance() returned true