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340
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with such
an offer, in accord with Subsection b above.)
The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
control compilation and installation of the executable. However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.
7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

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<?php
/**
* Part of the Joomla Framework Data Package
*
* @copyright Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Data;
use Joomla\Registry\Registry;
/**
* DataObject is a class that is used to store data but allowing you to access the data by mimicking the way PHP handles class properties.
*
* @since 1.0
*/
class DataObject implements DumpableInterface, \IteratorAggregate, \JsonSerializable, \Countable
{
/**
* The data object properties.
*
* @var array
* @since 1.0
*/
private $properties = [];
/**
* The class constructor.
*
* @param mixed $properties Either an associative array or another object by which to set the initial properties of the new object.
*
* @since 1.0
* @throws \InvalidArgumentException
*/
public function __construct($properties = [])
{
// Check the properties input.
if (!empty($properties)) {
// Bind the properties.
$this->bind($properties);
}
}
/**
* The magic get method is used to get a data property.
*
* This method is a public proxy for the protected getProperty method.
*
* Note: Magic __get does not allow recursive calls. This can be tricky because the error generated by recursing into
* __get is "Undefined property: {CLASS}::{PROPERTY}" which is misleading. This is relevant for this class because
* requesting a non-visible property can trigger a call to a sub-function. If that references the property directly in
* the object, it will cause a recursion into __get.
*
* @param string $property The name of the data property.
*
* @return mixed The value of the data property, or null if the data property does not exist.
*
* @see DataObject::getProperty()
* @since 1.0
*/
public function __get($property)
{
return $this->getProperty($property);
}
/**
* The magic isset method is used to check the state of an object property.
*
* @param string $property The name of the data property.
*
* @return boolean
*
* @since 1.0
*/
public function __isset($property)
{
return isset($this->properties[$property]);
}
/**
* The magic set method is used to set a data property.
*
* This is a public proxy for the protected setProperty method.
*
* @param string $property The name of the data property.
* @param mixed $value The value to give the data property.
*
* @return void
*
* @see DataObject::setProperty()
* @since 1.0
*/
public function __set($property, $value)
{
$this->setProperty($property, $value);
}
/**
* The magic unset method is used to unset a data property.
*
* @param string $property The name of the data property.
*
* @return void
*
* @since 1.0
*/
public function __unset($property)
{
unset($this->properties[$property]);
}
/**
* Binds an array or object to this object.
*
* @param mixed $properties An associative array of properties or an object.
* @param boolean $updateNulls True to bind null values, false to ignore null values.
*
* @return $this
*
* @since 1.0
* @throws \InvalidArgumentException
*/
public function bind($properties, $updateNulls = true)
{
// Check the properties data type.
if (!\is_array($properties) && !\is_object($properties)) {
throw new \InvalidArgumentException(
sprintf('The $properties argument must be an array or object, a %s was given.', \gettype($properties))
);
}
// Check if the object is traversable.
if ($properties instanceof \Traversable) {
// Convert iterator to array.
$properties = iterator_to_array($properties);
} elseif (\is_object($properties)) {
// Convert properties to an array.
$properties = (array) $properties;
}
// Bind the properties.
foreach ($properties as $property => $value) {
// Check if the value is null and should be bound.
if ($value === null && !$updateNulls) {
continue;
}
// Set the property.
$this->setProperty($property, $value);
}
return $this;
}
/**
* Dumps the data properties into an object, 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 $dumped An array of already serialized objects that is used to avoid infinite loops.
*
* @return \stdClass
*
* @since 1.0
*/
public function dump($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);
// Setup a container.
$dump = new \stdClass();
// Dump all object properties.
foreach (array_keys($this->properties) as $property) {
// Get the property.
$dump->$property = $this->dumpProperty($property, $depth, $dumped);
}
return $dump;
}
/**
* Gets this object represented as an ArrayIterator.
*
* This allows the data properties to be access via a foreach statement.
*
* @return \ArrayIterator
*
* @see IteratorAggregate::getIterator()
* @since 1.0
*/
public function getIterator()
{
return new \ArrayIterator($this->dump(0));
}
/**
* Gets the data properties in a form that can be serialised to JSON format.
*
* @return mixed
*
* @since 1.0
*/
public function jsonSerialize()
{
return $this->dump();
}
/**
* Dumps a data property.
*
* If recursion is set, this method will dump any object implementing DumpableInterface (like DataObject and DataSet); it will
* convert a DateTimeInterface object to a string; and it will convert a Joomla\Registry\Registry to an object.
*
* @param string $property The name of the data property.
* @param integer $depth The current depth of recursion (a value of 0 will ignore recursion).
* @param \SplObjectStorage $dumped An array of already serialized objects that is used to avoid infinite loops.
*
* @return mixed The value of the dumped property.
*
* @since 1.0
*/
protected function dumpProperty($property, $depth, \SplObjectStorage $dumped)
{
$value = $this->getProperty($property);
if ($depth > 0) {
// Check if the object is also a dumpable object.
if ($value instanceof DumpableInterface) {
// Do not dump the property if it has already been dumped.
if (!$dumped->contains($value)) {
$value = $value->dump($depth - 1, $dumped);
}
}
// Check if the object is a date.
if ($value instanceof \DateTimeInterface) {
$value = $value->format('Y-m-d H:i:s');
} elseif ($value instanceof Registry) {
$value = $value->toObject();
}
}
return $value;
}
/**
* Gets a data property.
*
* @param string $property The name of the data property.
*
* @return mixed The value of the data property.
*
* @see DataObject::__get()
* @since 1.0
*/
protected function getProperty($property)
{
return $this->properties[$property] ?? null;
}
/**
* Sets a data property.
*
* If the name of the property starts with a null byte, this method will return null.
*
* @param string $property The name of the data property.
* @param mixed $value The value to give the data property.
*
* @return mixed The value of the data property.
*
* @see DataObject::__set()
* @since 1.0
*/
protected function setProperty($property, $value)
{
/*
* Check if the property starts with a null byte. If so, discard it because a later attempt to try to access it
* can cause a fatal error. See http://www.php.net/manual/en/language.types.array.php#language.types.array.casting
*/
if (strpos($property, "\0") === 0) {
return;
}
// Set the value.
$this->properties[$property] = $value;
return $value;
}
/**
* Count the number of data properties.
*
* @return integer The number of data properties.
*
* @since 1.0
*/
public function count()
{
return \count($this->properties);
}
}

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<?php
/**
* Part of the Joomla Framework Data Package
*
* @copyright Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Data;
/**
* DataSet is a collection class that allows the developer to operate on a set of DataObjects as if they were in a typical PHP array.
*
* @since 1.0
*/
class DataSet implements DumpableInterface, \ArrayAccess, \Countable, \Iterator
{
/**
* The current position of the iterator.
*
* @var integer
* @since 1.0
*/
private $current = false;
/**
* The iterator objects.
*
* @var DataObject[]
* @since 1.0
*/
private $objects = [];
/**
* The class constructor.
*
* @param DataObject[] $objects An array of DataObject objects to bind to the data set.
*
* @since 1.0
* @throws \InvalidArgumentException if an object is not a DataObject.
*/
public function __construct(array $objects = [])
{
// Set the objects.
$this->initialise($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 $arguments The arguments of the method called.
*
* @return array An array of values returned by the methods called on the objects in the data set.
*
* @since 1.0
*/
public function __call($method, $arguments = [])
{
$return = [];
// Iterate through the objects.
foreach ($this->objects as $key => $object) {
// Create the object callback.
$callback = [$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 DataObject'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 $property The name of the data property.
*
* @return array An associative array of the values.
*
* @since 1.0
*/
public function __get($property)
{
$return = [];
// Iterate through the objects.
foreach ($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 $property The name of the property.
*
* @return boolean True if the property is set in any of the objects in the data set.
*
* @since 1.0
*/
public function __isset($property)
{
$return = [];
// Iterate through the objects.
foreach ($this->objects as $object) {
// Check the property.
$return[] = isset($object->$property);
}
return \in_array(true, $return, true);
}
/**
* 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 DataObject).
*
* @param string $property The name of the property.
* @param mixed $value The value to give the data property.
*
* @return void
*
* @since 1.0
*/
public function __set($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 DataObject's.
*
* @param string $property The name of the property.
*
* @return void
*
* @since 1.0
*/
public function __unset($property)
{
// Iterate through the objects.
foreach ($this->objects as $object) {
unset($object->$property);
}
}
/**
* Gets an array of keys, existing in objects
*
* @param string $type Selection type 'all' or 'common'
*
* @return array Array of keys
*
* @since 1.2.0
* @throws \InvalidArgumentException
*/
public function getObjectsKeys($type = 'all')
{
$keys = null;
if ($type == 'all') {
$function = 'array_merge';
} elseif ($type == 'common') {
$function = 'array_intersect_key';
} else {
throw new \InvalidArgumentException("Unknown selection type: $type");
}
foreach ($this->objects as $object) {
$objectVars = json_decode(json_encode($object), true);
$keys = ($keys === null) ? $objectVars : $function($keys, $objectVars);
}
return array_keys($keys);
}
/**
* Gets all objects as an array
*
* @param boolean $associative Option to set return mode: associative or numeric array.
* @param string ...$keys Unlimited optional property names to extract from objects.
*
* @return array Returns an array according to defined options.
*
* @since 1.2.0
*/
public function toArray($associative = true, ...$keys)
{
if (empty($keys)) {
$keys = $this->getObjectsKeys();
}
$return = [];
$i = 0;
foreach ($this->objects as $key => $object) {
$arrayItem = [];
$key = ($associative) ? $key : $i++;
$j = 0;
foreach ($keys as $property) {
$propertyKey = ($associative) ? $property : $j++;
$arrayItem[$propertyKey] = $object->$property ?? null;
}
$return[$key] = $arrayItem;
}
return $return;
}
/**
* Gets the number of data objects in the set.
*
* @return integer The number of objects.
*
* @since 1.0
*/
public function count()
{
return \count($this->objects);
}
/**
* Clears the objects in the data set.
*
* @return DataSet Returns itself to allow chaining.
*
* @since 1.0
*/
public function clear()
{
$this->objects = [];
$this->rewind();
return $this;
}
/**
* Get the current data object in the set.
*
* @return DataObject|false The current object, or false if the array is empty or the pointer is beyond the end of the elements.
*
* @since 1.0
*/
public function current()
{
return is_scalar($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 $dumped An array of already serialized objects that is used to avoid infinite loops.
*
* @return array An associative array of the data objects in the set, dumped as a simple PHP stdClass object.
*
* @see DataObject::dump()
* @since 1.0
*/
public function dump($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);
$objects = [];
// Make sure that we have not reached our maximum depth.
if ($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.
*
* @return array
*
* @since 1.0
*/
public function jsonSerialize()
{
$return = [];
// Iterate through the objects.
foreach ($this->objects as $object) {
// Call the method for the object.
$return[] = $object;
}
return $return;
}
/**
* Gets the key of the current object in the iterator.
*
* @return integer|false The object key on success; false on failure.
*
* @since 1.0
*/
public function key()
{
return $this->current;
}
/**
* Gets the array of keys for all the objects in the iterator (emulates array_keys).
*
* @return array The array of keys
*
* @since 1.0
*/
public function keys()
{
return array_keys($this->objects);
}
/**
* Applies a function to every object in the set (emulates array_walk).
*
* @param callable $funcname Callback function.
*
* @return boolean
*
* @since 1.2.0
* @throws \InvalidArgumentException
*/
public function walk(callable $funcname)
{
foreach ($this->objects as $key => $object) {
$funcname($object, $key);
}
return true;
}
/**
* Advances the iterator to the next object in the iterator.
*
* @return void
*
* @since 1.0
*/
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 $offset The object offset.
*
* @return boolean
*
* @since 1.0
*/
public function offsetExists($offset)
{
return isset($this->objects[$offset]);
}
/**
* Gets an offset in the iterator.
*
* @param mixed $offset The object offset.
*
* @return DataObject|null
*
* @since 1.0
*/
public function offsetGet($offset)
{
return $this->objects[$offset] ?? null;
}
/**
* Sets an offset in the iterator.
*
* @param mixed $offset The object offset.
* @param DataObject $object The object object.
*
* @return void
*
* @since 1.0
* @throws \InvalidArgumentException if an object is not an instance of DataObject.
*/
public function offsetSet($offset, $object)
{
if (!($object instanceof DataObject)) {
throw new \InvalidArgumentException(
sprintf(
'The $object argument must be an instance of "%s", a %s was given.',
DataObject::class,
\gettype($object) === 'object' ? \get_class($object) : \gettype($object)
)
);
}
// Set the offset.
if ($offset === null) {
$this->objects[] = $object;
} else {
$this->objects[$offset] = $object;
}
}
/**
* Unsets an offset in the iterator.
*
* @param mixed $offset The object offset.
*
* @return void
*
* @since 1.0
*/
public function offsetUnset($offset)
{
if (!isset($this[$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[$offset]);
}
/**
* Rewinds the iterator to the first object.
*
* @return void
*
* @since 1.0
*/
public function rewind()
{
// Set the current position to the first object.
if (empty($this->objects)) {
$this->current = false;
} else {
$keys = $this->keys();
$this->current = array_shift($keys);
}
}
/**
* Validates the iterator.
*
* @return boolean
*
* @since 1.0
*/
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 1.0
* @throws \InvalidArgumentException if an object is not a DataObject.
*/
private function initialise(array $input = [])
{
foreach ($input as $key => $object) {
if ($object !== null) {
$this[$key] = $object;
}
}
$this->rewind();
}
}

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<?php
/**
* Part of the Joomla Framework Data Package
*
* @copyright Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Data;
/**
* An interface to define if an object is dumpable.
*
* @since 1.0
*/
interface DumpableInterface
{
/**
* Dumps the data properties into an object, recursively if appropriate.
*
* @param integer $depth The maximum depth of recursion.
* 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 $dumped An array of already serialized objects that is used to avoid infinite loops.
*
* @return \stdClass
*
* @since 1.0
*/
public function dump($depth = 3, \SplObjectStorage $dumped = null);
}