_initialise($objects); } /** * The magic call method is used to call object methods using the iterator. * * Example: $array = $objectList->foo('bar'); * * The object list will iterate over its objects and see if each object has a callable 'foo' method. * If so, it will pass the argument list and assemble any return values. If an object does not have * a callable method no return value is recorded. * The keys of the objects and the result array are maintained. * * @param string $method The name of the method called. * @param array $arguments The arguments of the method called. * * @return array An array of values returned by the methods called on the objects in the data set. * * @since 12.3 */ public function __call($method, $arguments = array()) { $return = array(); // Iterate through the objects. foreach ($this->_objects as $key => $object) { // Create the object callback. $callback = array($object, $method); // Check if the callback is callable. if (is_callable($callback)) { // Call the method for the object. $return[$key] = call_user_func_array($callback, $arguments); } } return $return; } /** * The magic get method is used to get a list of properties from the objects in the data set. * * Example: $array = $dataSet->foo; * * This will return a column of the values of the 'foo' property in all the objects * (or values determined by custom property setters in the individual JData's). * The result array will contain an entry for each object in the list (compared to __call which may not). * The keys of the objects and the result array are maintained. * * @param string $property The name of the data property. * * @return array An associative array of the values. * * @since 12.3 */ public function __get($property) { $return = array(); // Iterate through the objects. foreach ($this->_objects as $key => $object) { // Get the property. $return[$key] = $object->$property; } return $return; } /** * The magic isset method is used to check the state of an object property using the iterator. * * Example: $array = isset($objectList->foo); * * @param string $property The name of the property. * * @return boolean True if the property is set in any of the objects in the data set. * * @since 12.3 */ public function __isset($property) { $return = array(); // Iterate through the objects. foreach ($this->_objects as $object) { // Check the property. $return[] = isset($object->$property); } return in_array(true, $return, true) ? true : false; } /** * The magic set method is used to set an object property using the iterator. * * Example: $objectList->foo = 'bar'; * * This will set the 'foo' property to 'bar' in all of the objects * (or a value determined by custom property setters in the JData). * * @param string $property The name of the property. * @param mixed $value The value to give the data property. * * @return void * * @since 12.3 */ public function __set($property, $value) { // Iterate through the objects. foreach ($this->_objects as $object) { // Set the property. $object->$property = $value; } } /** * The magic unset method is used to unset an object property using the iterator. * * Example: unset($objectList->foo); * * This will unset all of the 'foo' properties in the list of JData's. * * @param string $property The name of the property. * * @return void * * @since 12.3 */ public function __unset($property) { // Iterate through the objects. foreach ($this->_objects as $object) { unset($object->$property); } } /** * Gets the number of data objects in the set. * * @return integer The number of objects. * * @since 12.3 */ public function count() { return count($this->_objects); } /** * Clears the objects in the data set. * * @return JDataSet Returns itself to allow chaining. * * @since 12.3 */ public function clear() { $this->_objects = array(); $this->rewind(); return $this; } /** * Get the current data object in the set. * * @return JData The current object, or false if the array is empty or the pointer is beyond the end of the elements. * * @since 12.3 */ public function current() { return is_scalar($this->_current) ? $this->_objects[$this->_current] : false; } /** * Dumps the data object in the set, recursively if appropriate. * * @param integer $depth The maximum depth of recursion (default = 3). * For example, a depth of 0 will return a stdClass with all the properties in native * form. A depth of 1 will recurse into the first level of properties only. * @param SplObjectStorage $dumped An array of already serialized objects that is used to avoid infinite loops. * * @return array An associative array of the date objects in the set, dumped as a simple PHP stdClass object. * * @see JData::dump() * @since 12.3 */ public function dump($depth = 3, SplObjectStorage $dumped = null) { // Check if we should initialise the recursion tracker. if ($dumped === null) { $dumped = new SplObjectStorage; } // Add this object to the dumped stack. $dumped->attach($this); $objects = array(); // Make sure that we have not reached our maximum depth. if ($depth > 0) { // Handle JSON serialization recursively. foreach ($this->_objects as $key => $object) { $objects[$key] = $object->dump($depth, $dumped); } } return $objects; } /** * Gets the data set in a form that can be serialised to JSON format. * * Note that this method will not return an associative array, otherwise it would be encoded into an object. * JSON decoders do not consistently maintain the order of associative keys, whereas they do maintain the order of arrays. * * @param mixed $serialized An array of objects that have already been serialized that is used to infinite loops * (null on first call). * * @return array An array that can be serialised by json_encode(). * * @since 12.3 */ public function jsonSerialize($serialized = null) { // Check if we should initialise the recursion tracker. if ($serialized === null) { $serialized = array(); } // Add this object to the serialized stack. $serialized[] = spl_object_hash($this); $return = array(); // Iterate through the objects. foreach ($this->_objects as $object) { // Call the method for the object. $return[] = $object->jsonSerialize($serialized); } return $return; } /** * Gets the key of the current object in the iterator. * * @return scalar The object key on success; null on failure. * * @since 12.3 */ public function key() { return $this->_current; } /** * Gets the array of keys for all the objects in the iterator (emulates array_keys). * * @return array The array of keys * * @since 12.3 */ public function keys() { return array_keys($this->_objects); } /** * Advances the iterator to the next object in the iterator. * * @return void * * @since 12.3 */ public function next() { // Get the object offsets. $keys = $this->keys(); // Check if _current has been set to false but offsetUnset. if ($this->_current === false && isset($keys[0])) { // This is a special case where offsetUnset was used in a foreach loop and the first element was unset. $this->_current = $keys[0]; } else { // Get the current key. $position = array_search($this->_current, $keys); // Check if there is an object after the current object. if ($position !== false && isset($keys[$position + 1])) { // Get the next id. $this->_current = $keys[$position + 1]; } else { // That was the last object or the internal properties have become corrupted. $this->_current = null; } } } /** * Checks whether an offset exists in the iterator. * * @param mixed $offset The object offset. * * @return boolean True if the object exists, false otherwise. * * @since 12.3 */ public function offsetExists($offset) { return isset($this->_objects[$offset]); } /** * Gets an offset in the iterator. * * @param mixed $offset The object offset. * * @return JData The object if it exists, null otherwise. * * @since 12.3 */ public function offsetGet($offset) { return isset($this->_objects[$offset]) ? $this->_objects[$offset] : null; } /** * Sets an offset in the iterator. * * @param mixed $offset The object offset. * @param JData $object The object object. * * @return void * * @since 12.3 * @throws InvalidArgumentException if an object is not an instance of JData. */ public function offsetSet($offset, $object) { // Check if the object is a JData object. if (!($object instanceof JData)) { throw new InvalidArgumentException(sprintf('%s("%s", *%s*)', __METHOD__, $offset, gettype($object))); } // Set the offset. $this->_objects[$offset] = $object; } /** * Unsets an offset in the iterator. * * @param mixed $offset The object offset. * * @return void * * @since 12.3 */ public function offsetUnset($offset) { if (!$this->offsetExists($offset)) { // Do nothing if the offset does not exist. return; } // Check for special handling of unsetting the current position. if ($offset == $this->_current) { // Get the current position. $keys = $this->keys(); $position = array_search($this->_current, $keys); // Check if there is an object before the current object. if ($position > 0) { // Move the current position back one. $this->_current = $keys[$position - 1]; } else { // We are at the start of the keys AND let's assume we are in a foreach loop and `next` is going to be called. $this->_current = false; } } unset($this->_objects[$offset]); } /** * Rewinds the iterator to the first object. * * @return void * * @since 12.3 */ public function rewind() { // Set the current position to the first object. if (empty($this->_objects)) { $this->_current = false; } else { $keys = $this->keys(); $this->_current = array_shift($keys); } } /** * Validates the iterator. * * @return boolean True if valid, false otherwise. * * @since 12.3 */ public function valid() { // Check the current position. if (!is_scalar($this->_current) || !isset($this->_objects[$this->_current])) { return false; } return true; } /** * Initialises the list with an array of objects. * * @param array $input An array of objects. * * @return void * * @since 12.3 * @throws InvalidArgumentException if an object is not an instance of JData. */ private function _initialise(array $input = array()) { foreach ($input as $key => $object) { if (!is_null($object)) { $this->offsetSet($key, $object); } } $this->rewind(); } }