141 lines
3.4 KiB
PHP
141 lines
3.4 KiB
PHP
<?php
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namespace Icinga\Protocol\Statusdat\View;
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use \Iterator;
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use \Countable;
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use \ArrayAccess;
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use \Exception;
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/**
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* Wrapper around an array of monitoring objects that can be enhanced with an optional
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* object that extends AccessorStrategy. This will act as a dataview and provide
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* normalized access to the underlying data (mapping properties, retrieving additional data)
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*
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* If not Accessor is set, this class just behaves like a normal Iterator and returns
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* the underlying objects.
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*
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* If the dataset contains arrays instead of objects, they will be cast to objects.
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*
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*/
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class MonitoringObjectList implements Iterator, Countable, ArrayAccess
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{
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private $dataSet = array();
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private $position = 0;
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private $dataView = null;
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public function __construct(array &$dataset, AccessorStrategy $dataView = null)
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{
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$this->dataSet = $dataset;
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$this->position = 0;
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$this->dataView = $dataView;
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}
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public function count()
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{
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return count($this->dataSet);
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}
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public function setPosition($pos)
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{
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$this->position = $pos;
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}
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/**
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* (PHP 5 >= 5.0.0)<br/>
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* Return the current element
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* @link http://php.net/manual/en/iterator.current.php
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* @return mixed Can return any type.
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*/
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public function current()
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{
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if ($this->dataView) {
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return $this;
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}
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return $this->dataSet[$this->position];
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}
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/**
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* (PHP 5 >= 5.0.0)<br/>
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* Move forward to next element
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* @link http://php.net/manual/en/iterator.next.php
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* @return void Any returned value is ignored.
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*/
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public function next()
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{
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$this->position++;
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}
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/**
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* (PHP 5 >= 5.0.0)<br/>
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* Return the key of the current element
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* @link http://php.net/manual/en/iterator.key.php
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* @return mixed scalar on success, or null on failure.
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*/
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public function key()
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{
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return $this->position;
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}
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/**
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* (PHP 5 >= 5.0.0)<br/>
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* Checks if current position is valid
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* @link http://php.net/manual/en/iterator.valid.php
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* @return boolean The return value will be casted to boolean and then evaluated.
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* Returns true on success or false on failure.
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*/
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public function valid()
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{
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return $this->position < count($this->dataSet);
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}
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/**
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* (PHP 5 >= 5.0.0)<br/>
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* Rewind the Iterator to the first element
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* @link http://php.net/manual/en/iterator.rewind.php
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* @return void Any returned value is ignored.
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*/
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public function rewind()
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{
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$this->position = 0;
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}
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public function __isset($name)
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{
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return $this->dataView->exists($this->dataSet[$this->position], $name);
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}
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public function __get($name)
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{
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return $this->dataView->get($this->dataSet[$this->position], $name);
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}
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public function __set($name, $value)
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{
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throw new Exception("Setting is currently not available for objects");
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}
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public function offsetExists($offset)
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{
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return count($this->dataSet) < $offset;
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}
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public function offsetGet($offset)
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{
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$res = new MonitoringObjectList($this->dataSet, $this->dataView);
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$res->position = $offset;
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return $res;
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}
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public function offsetSet($offset, $value)
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{
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// non mutable
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}
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public function offsetUnset($offset)
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{
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// non mutable
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}
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}
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