pl.chilldev.commons.collections.pageable.PageableCollection Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of commons-collections Show documentation

Collections-related utilities and data structures.

The newest version!

/**
 * This file is part of the ChillDev-Commons.
 *
 * @license http://mit-license.org/ The MIT license
 * @copyright 2015 - 2016 © by Rafał Wrzeszcz - Wrzasq.pl.
 */

package pl.chilldev.commons.collections.pageable;

import java.util.Iterator;
import java.util.function.Function;

import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Slice;

/**
 * Collection class representing paged resource.
 *
 * @param  Collection element type.
 */
public class PageableCollection implements Iterable
{
    /**
     * Initial page request.
     */
    private Pageable request;

    /**
     * Data source for paged results.
     */
    private Function> source;

    /**
     * Initializes collection for given starting point.
     *
     * @param request Initial page request.
     * @param source Paged results data source.
     */
    public PageableCollection(Pageable request, Function> source)
    {
        this.request = request;
        this.source = source;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Iterator iterator()
    {
        return new PageableIterator<>(this.source.apply(this.request), this.source);
    }
}