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<?php |
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/** |
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* @file QueryResult.php |
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* @brief This file contains the QueryResult class. |
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* @details |
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* @author Filippo F. Fadda |
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*/ |
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//! The CouchDB's results namespace. |
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namespace EoC\Result; |
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/** |
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* @brief This class implements `IteratorAggregate`, `Countable`, and `ArrayAccess` and let you use the query's result |
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* as an array. |
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* @nosubgrouping |
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*/ |
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class QueryResult implements \IteratorAggregate, \Countable, \ArrayAccess { |
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protected $result; |
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/** |
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* @brief Creates an instance of the class |
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* @param array $result The result of a CouchDB's query converted from JSON to array. |
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*/ |
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public function __construct($result) { |
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$this->result = &$result; |
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} |
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/** |
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* @brief Gets the number of total rows in the view. |
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* @return integer Number of the view rows. |
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*/ |
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public function getTotalRows() { |
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return $this->result['total_rows']; |
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} |
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/** |
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* @brief Returns count or sum in case this is the result of a reduce function. |
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* @return integer The result of the reduce function. |
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*/ |
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public function getReducedValue() { |
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return empty($this->result['rows']) ? 0 : $this->result['rows'][0]['value']; |
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} |
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/** |
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* @brief Returns the result as a real array of rows to be used with `array_column()` or other functions operating on |
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* arrays. |
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* @return array An array of rows. |
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*/ |
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public function asArray() { |
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return $this->result['rows']; |
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} |
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/** |
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* @brief Returns `true` in case there aren't rows, `false` otherwise. |
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* @details Since the PHP core developers are noobs, `empty()` cannot be used on any class that implements ArrayAccess. |
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* @attention This method must be used in place of `empty()`. |
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* @return bool |
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*/ |
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public function isEmpty() { |
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return empty($this->result['rows']) ? TRUE : FALSE; |
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} |
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/** |
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* @brief Returns an external iterator. |
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* @return [ArrayIterator](http://php.net/manual/en/class.arrayiterator.php). |
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*/ |
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public function getIterator() { |
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return new \ArrayIterator($this->result['rows']); |
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} |
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/** |
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* @brief Returns the number of documents found. |
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* @return integer Number of documents. |
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*/ |
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public function count() { |
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return count($this->result['rows']); |
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} |
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/** |
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* @brief Whether or not an offset exists. |
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* @details This method is executed when using `isset()` or `empty()` on objects implementing ArrayAccess. |
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* @param integer $offset An offset to check for. |
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* @return bool Returns `true` on success or `false` on failure. |
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*/ |
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public function offsetExists($offset) { |
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return isset($this->result['rows'][$offset]); |
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} |
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/** |
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* @brief Returns the value at specified offset. |
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* @details This method is executed when checking if offset is `empty()`. |
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* @param integer $offset The offset to retrieve. |
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* @return mixed Can return all value types. |
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*/ |
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public function offsetGet($offset) { |
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return $this->result['rows'][$offset]; |
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} |
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//! @cond HIDDEN_SYMBOLS |
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public function offsetSet($offset, $value) { |
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throw new \BadMethodCallException("Result is immutable and cannot be changed."); |
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} |
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public function offsetUnset($offset) { |
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throw new \BadMethodCallException("Result is immutable and cannot be changed."); |
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} |
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//! @endcond |
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} |