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<?php |
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namespace ByJG\AnyDataset\Dataset; |
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use ByJG\AnyDataset\Exception\DatabaseException; |
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use ByJG\Util\XmlUtil; |
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use InvalidArgumentException; |
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/** |
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* AnyDataset is a simple way to store data using only XML file. |
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* Your structure is hierarquical and each "row" contains "fields" but these structure can vary for each row. |
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* Anydataset files have extension ".anydata.xml" and have many classes to put and get data into anydataset xml file. |
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* Anydataset class just read and write files. To search elements you need use AnyIterator |
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* and IteratorFilter. Each row have a class Row. |
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* XML Structure |
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* <code> |
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* <anydataset> |
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* <row> |
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* <field name="fieldname1">value of fieldname 1</field> |
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* <field name="fieldname2">value of fieldname 2</field> |
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* <field name="fieldname3">value of fieldname 3</field> |
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* </row> |
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* <row> |
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* <field name="fieldname1">value of fieldname 1</field> |
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* <field name="fieldname4">value of fieldname 4</field> |
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* </row> |
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* </anydataset> |
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* </code> |
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* How to use: |
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* <code> |
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* $any = new AnyDataset(); |
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* </code> |
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* |
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*@see Row |
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* @see AnyIterator |
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* @see IteratorFilter |
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*/ |
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class AnyDataset |
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{ |
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/** |
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* Internal structure represent the current Row |
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* |
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* @var Row[] |
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*/ |
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private $collection; |
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/** |
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* Current node anydataset works |
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* @var int |
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*/ |
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private $currentRow; |
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/** |
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* Path to anydataset file |
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* @var string |
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*/ |
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private $path; |
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/** |
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* @param string $file |
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* @throws \ByJG\Serializer\Exception\InvalidArgumentException |
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* @throws \ByJG\Util\Exception\XmlUtilException |
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*/ |
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public function __construct($file = null) |
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{ |
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$this->collection = array(); |
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$this->currentRow = -1; |
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$this->path = null; |
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if (!is_null($file)) { |
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if (!is_string($file)) { |
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throw new \InvalidArgumentException('I expected a string as a file name'); |
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} |
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$ext = pathinfo($file, PATHINFO_EXTENSION); |
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if (empty($ext)) { |
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$file .= '.anydata.xml'; |
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} |
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$this->path = $file; |
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$this->createFrom($this->path); |
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} |
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} |
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/** |
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* Private method used to read and populate anydataset class from specified file |
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* |
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* @param string $filepath Path and Filename to be read |
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* @throws \ByJG\Serializer\Exception\InvalidArgumentException |
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* @throws \ByJG\Util\Exception\XmlUtilException |
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*/ |
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private function createFrom($filepath) |
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{ |
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if (file_exists($filepath)) { |
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$anyDataSet = XmlUtil::createXmlDocumentFromFile($filepath); |
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$this->collection = array(); |
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$rows = $anyDataSet->getElementsByTagName("row"); |
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foreach ($rows as $row) { |
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$sr = new Row(); |
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$fields = $row->getElementsByTagName("field"); |
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foreach ($fields as $field) { |
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$attr = $field->attributes->getNamedItem("name"); |
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if (is_null($attr)) { |
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throw new \InvalidArgumentException('Malformed anydataset file ' . basename($filepath)); |
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} |
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$sr->addField($attr->nodeValue, $field->nodeValue); |
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} |
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$sr->acceptChanges(); |
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$this->collection[] = $sr; |
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} |
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$this->currentRow = count($this->collection) - 1; |
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} |
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} |
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/** |
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* Returns the AnyDataset XML representative structure. |
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* |
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* @return string XML String |
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* @throws \ByJG\Util\Exception\XmlUtilException |
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*/ |
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public function xml() |
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{ |
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return $this->getAsDom()->saveXML(); |
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} |
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/** |
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* Returns the AnyDataset XmlDocument representive object |
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* |
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* @return \DOMDocument XmlDocument object |
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* @throws \ByJG\Util\Exception\XmlUtilException |
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*/ |
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public function getAsDom() |
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{ |
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$anyDataSet = XmlUtil::createXmlDocumentFromStr("<anydataset></anydataset>"); |
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$nodeRoot = $anyDataSet->getElementsByTagName("anydataset")->item(0); |
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foreach ($this->collection as $sr) { |
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$row = $sr->getAsDom(); |
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$nodeRow = $row->getElementsByTagName("row")->item(0); |
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$newRow = XmlUtil::createChild($nodeRoot, "row"); |
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XmlUtil::addNodeFromNode($newRow, $nodeRow); |
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} |
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return $anyDataSet; |
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} |
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/** |
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* @param string $file |
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* @throws DatabaseException |
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* @throws \ByJG\Util\Exception\XmlUtilException |
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*/ |
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public function save($file = null) |
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{ |
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if (!is_null($file)) { |
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if (!is_string($file)) { |
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throw new InvalidArgumentException('Invalid file name'); |
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} |
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$this->path = $file; |
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} |
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if (is_null($this->path)) { |
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throw new DatabaseException("No such file path to save anydataset"); |
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} |
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XmlUtil::saveXmlDocument($this->getAsDom(), $this->path); |
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} |
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/** |
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* Append one row to AnyDataset. |
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* |
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* @param Row $singleRow |
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* @return void |
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* @throws \ByJG\Serializer\Exception\InvalidArgumentException |
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*/ |
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public function appendRow($singleRow = null) |
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{ |
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if (!is_null($singleRow)) { |
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if ($singleRow instanceof Row) { |
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$this->collection[] = $singleRow; |
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$singleRow->acceptChanges(); |
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} elseif (is_array($singleRow)) { |
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$this->collection[] = new Row($singleRow); |
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} else { |
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throw new InvalidArgumentException("You must pass an array or a Row object"); |
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} |
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} else { |
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$singleRow = new Row(); |
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$this->collection[] = $singleRow; |
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$singleRow->acceptChanges(); |
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} |
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$this->currentRow = count($this->collection) - 1; |
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} |
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/** |
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* Enter description here... |
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* |
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* @param GenericIterator $iterator |
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* @throws \ByJG\Serializer\Exception\InvalidArgumentException |
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*/ |
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public function import($iterator) |
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{ |
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foreach ($iterator as $singleRow) { |
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$this->appendRow($singleRow); |
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} |
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} |
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/** |
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* Insert one row before specified position. |
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* |
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* @param int $rowNumber |
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* @param mixed $row |
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* @throws \ByJG\Serializer\Exception\InvalidArgumentException |
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*/ |
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public function insertRowBefore($rowNumber, $row = null) |
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{ |
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if ($rowNumber > count($this->collection)) { |
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$this->appendRow($row); |
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} else { |
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$singleRow = $row; |
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if (!($row instanceof Row)) { |
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$singleRow = new Row($row); |
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} |
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array_splice($this->collection, $rowNumber, 0, ''); |
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$this->collection[$rowNumber] = $singleRow; |
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} |
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} |
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/** |
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* |
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* @param mixed $row |
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*/ |
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public function removeRow($row = null) |
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{ |
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if (is_null($row)) { |
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$row = $this->currentRow; |
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} |
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if ($row instanceof Row) { |
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$iPos = 0; |
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foreach ($this->collection as $sr) { |
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if ($sr->toArray() == $row->toArray()) { |
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$this->removeRow($iPos); |
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break; |
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} |
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$iPos++; |
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} |
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return; |
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} |
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if ($row == 0) { |
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$this->collection = array_slice($this->collection, 1); |
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} else { |
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$this->collection = array_slice($this->collection, 0, $row) + array_slice($this->collection, $row); |
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} |
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} |
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/** |
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* Add a single string field to an existing row |
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* |
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* @param string $name - Field name |
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* @param string $value - Field value |
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* @return void |
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* @throws \ByJG\Serializer\Exception\InvalidArgumentException |
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*/ |
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public function addField($name, $value) |
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{ |
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if ($this->currentRow < 0) { |
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$this->appendRow(); |
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} |
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$this->collection[$this->currentRow]->addField($name, $value); |
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} |
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/** |
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* Get an Iterator filtered by an IteratorFilter |
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* @param IteratorFilter $itf |
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* @return GenericIterator |
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*/ |
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public function getIterator(IteratorFilter $itf = null) |
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{ |
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if (is_null($itf)) { |
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return new AnyIterator($this->collection); |
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} |
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return new AnyIterator($itf->match($this->collection)); |
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} |
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/** |
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* @desc |
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* @param IteratorFilter $itf |
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* @param string $fieldName |
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* @return array |
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*/ |
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public function getArray($itf, $fieldName) |
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{ |
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$iterator = $this->getIterator($itf); |
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$result = array(); |
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while ($iterator->hasNext()) { |
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$singleRow = $iterator->moveNext(); |
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$result [] = $singleRow->get($fieldName); |
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} |
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return $result; |
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} |
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/** |
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* |
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* @param string $field |
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* @return void |
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*/ |
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public function sort($field) |
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{ |
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if (count($this->collection) == 0) { |
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return; |
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} |
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$this->collection = $this->quickSortExec($this->collection, $field); |
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return; |
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} |
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/** |
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* @param Row[] $seq |
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* @param $field |
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* @return array |
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*/ |
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protected function quickSortExec($seq, $field) |
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{ |
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if (!count($seq)) { |
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return $seq; |
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} |
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$key = $seq[0]; |
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$left = $right = array(); |
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$cntSeq = count($seq); |
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for ($i = 1; $i < $cntSeq; $i ++) { |
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if ($seq[$i]->get($field) <= $key->get($field)) { |
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$left[] = $seq[$i]; |
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} else { |
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$right[] = $seq[$i]; |
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} |
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} |
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return array_merge( |
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$this->quickSortExec($left, $field), |
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[ $key ], |
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$this->quickSortExec($right, $field) |
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); |
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} |
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} |
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