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<?php |
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/* |
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* Copyright (c) 2013 Janos Szurovecz |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy of |
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* this software and associated documentation files (the "Software"), to deal in |
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* the Software without restriction, including without limitation the rights to |
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
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* of the Software, and to permit persons to whom the Software is furnished to do |
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* so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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namespace predaddy\presentation; |
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use InvalidArgumentException; |
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use precore\lang\Object; |
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use precore\lang\ObjectInterface; |
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use precore\util\Objects; |
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use precore\util\Preconditions; |
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/** |
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* Default implementation of Pageable. |
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* The first page number is 0. |
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* |
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* @author Janos Szurovecz <[email protected]> |
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*/ |
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class PageRequest extends Object implements Pageable |
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{ |
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private $page; |
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private $size; |
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private $sort; |
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/** |
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* @param int $page Started from 0 |
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* @param int $size Size of the page |
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* @param Sort $sort |
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* @throws InvalidArgumentException if $page is < 0 |
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*/ |
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public function __construct($page, $size, Sort $sort = null) |
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{ |
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Preconditions::checkArgument(0 <= $page, 'Page must be at least 0'); |
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$this->page = (int) $page; |
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$this->size = (int) $size; |
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$this->sort = $sort; |
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} |
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/** |
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* @return Pageable |
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*/ |
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public function first() |
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{ |
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return new PageRequest(0, $this->size, $this->sort); |
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} |
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/** |
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* @return int |
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*/ |
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public function getOffset() |
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{ |
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return $this->page * $this->size; |
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} |
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/** |
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* @return int |
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*/ |
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public function getPageNumber() |
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{ |
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return $this->page; |
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} |
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/** |
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* @return int |
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*/ |
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public function getPageSize() |
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{ |
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return $this->size; |
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} |
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/** |
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* @return Sort |
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*/ |
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public function getSort() |
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{ |
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return $this->sort; |
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} |
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public function hasPrevious() |
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{ |
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return 0 < $this->page; |
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} |
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/** |
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* @return Pageable |
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*/ |
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public function next() |
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{ |
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return new PageRequest($this->page + 1, $this->size, $this->sort); |
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} |
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/** |
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* @return Pageable |
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*/ |
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public function previousOrFirst() |
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{ |
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return $this->hasPrevious() |
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? new PageRequest($this->page - 1, $this->size, $this->sort) |
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: $this; |
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} |
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public function equals(ObjectInterface $object = null) |
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{ |
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if ($object === $this) { |
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return true; |
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} |
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/* @var $object PageRequest */ |
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return $object !== null |
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&& $this->getClassName() === $object->getClassName() |
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&& Objects::equal($this->page, $object->page) |
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&& Objects::equal($this->size, $object->size) |
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&& Objects::equal($this->sort, $object->sort); |
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} |
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public function toString() |
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{ |
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return Objects::toStringHelper($this) |
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->add('page', $this->page) |
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->add('size', $this->size) |
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->add('sort', $this->sort) |
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->toString(); |
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} |
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} |
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szjani /
predaddy
