Merge branch 'master' of github.com:domnikl/DesignPatternsPHP

.gitignore

@@ -4,3 +4,6 @@
 /vendor/
 _build/
 *.mo
+.vagrant/
+phpunit.xml
+composer.phar

.travis.yml

@@ -20,8 +20,11 @@ cache:
   directories:
     - $HOME/.composer/cache
 
-before_script:
+before_install:
   - composer self-update
+  - composer validate
+
+install:
   - composer install --prefer-dist --no-interaction
 
 script:

Behavioral/ChainOfResponsibilities/Handler.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\ChainOfResponsibilities;
 
 /**
- * Handler is a generic handler in the chain of responsibilities
+ * Handler is a generic handler in the chain of responsibilities.
  *
  * Yes you could have a lighter CoR with a simpler handler but if you want your CoR
  * to be extendable and decoupled, it's a better idea to do things like that in real
@@ -18,7 +18,7 @@ abstract class Handler
     private $successor = null;
 
     /**
-     * Append a responsibility to the end of chain
+     * Append a responsibility to the end of chain.
      *
      * A prepend method could be done with the same spirit
      *
@@ -68,7 +68,7 @@ abstract class Handler
     }
 
     /**
-     * Each concrete handler has to implement the processing of the request
+     * Each concrete handler has to implement the processing of the request.
      *
      * @param Request $req
      *

Behavioral/ChainOfResponsibilities/Responsible/FastStorage.php

@@ -6,7 +6,7 @@ use DesignPatterns\Behavioral\ChainOfResponsibilities\Handler;
 use DesignPatterns\Behavioral\ChainOfResponsibilities\Request;
 
 /**
- * Class FastStorage
+ * Class FastStorage.
  */
 class FastStorage extends Handler
 {

Behavioral/ChainOfResponsibilities/Responsible/SlowStorage.php

@@ -6,14 +6,13 @@ use DesignPatterns\Behavioral\ChainOfResponsibilities\Handler;
 use DesignPatterns\Behavioral\ChainOfResponsibilities\Request;
 
 /**
- * This is mostly the same code as FastStorage but in fact, it may greatly differs
+ * This is mostly the same code as FastStorage but in fact, it may greatly differs.
  *
  * One important fact about CoR: each item in the chain MUST NOT assume its position
  * in the chain. A CoR is not responsible if the request is not handled UNLESS
- * you make an "ExceptionHandler" which throws execption if the request goes there.
+ * you make an "ExceptionHandler" which throws exception if the request goes there.
  *
  * To be really extendable, each handler doesn't know if there is something after it.
- *
  */
 class SlowStorage extends Handler
 {

Behavioral/ChainOfResponsibilities/Tests/ChainTest.php

@@ -3,16 +3,15 @@
 namespace DesignPatterns\Behavioral\ChainOfResponsibilities\Tests;
 
 use DesignPatterns\Behavioral\ChainOfResponsibilities\Request;
+use DesignPatterns\Behavioral\ChainOfResponsibilities\Responsible;
 use DesignPatterns\Behavioral\ChainOfResponsibilities\Responsible\FastStorage;
 use DesignPatterns\Behavioral\ChainOfResponsibilities\Responsible\SlowStorage;
-use DesignPatterns\Behavioral\ChainOfResponsibilities\Responsible;
 
 /**
- * ChainTest tests the CoR
+ * ChainTest tests the CoR.
  */
 class ChainTest extends \PHPUnit_Framework_TestCase
 {
-
     /**
      * @var FastStorage
      */
@@ -30,7 +29,7 @@ class ChainTest extends \PHPUnit_Framework_TestCase
         $request->verb = 'get';
 
         return array(
-            array($request)
+            array($request),
         );
     }
 

Behavioral/Command/AddMessageDateCommand.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace DesignPatterns\Behavioral\Command;
+
+/**
+ * This concrete command tweaks receiver to add current date to messages
+ * invoker just knows that it can call "execute".
+ */
+class AddMessageDateCommand implements UndoableCommandInterface
+{
+    /**
+     * @var Receiver
+     */
+    protected $output;
+
+    /**
+     * Each concrete command is built with different receivers.
+     * There can be one, many or completely no receivers, but there can be other commands in the parameters.
+     *
+     * @param Receiver $console
+     */
+    public function __construct(Receiver $console)
+    {
+        $this->output = $console;
+    }
+
+    /**
+     * Execute and make receiver to enable displaying messages date.
+     */
+    public function execute()
+    {
+        // sometimes, there is no receiver and this is the command which
+        // does all the work
+        $this->output->enableDate();
+    }
+
+    /**
+     * Undo the command and make receiver to disable displaying messages date.
+     */
+    public function undo()
+    {
+        // sometimes, there is no receiver and this is the command which
+        // does all the work
+        $this->output->disableDate();
+    }
+}

Behavioral/Command/CommandInterface.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\Command;
 
 /**
- * class CommandInterface
+ * class CommandInterface.
  */
 interface CommandInterface
 {

Behavioral/Command/HelloCommand.php

@@ -4,7 +4,7 @@ namespace DesignPatterns\Behavioral\Command;
 
 /**
  * This concrete command calls "print" on the Receiver, but an external
- * invoker just know he can call "execute"
+ * invoker just knows that it can call "execute".
  */
 class HelloCommand implements CommandInterface
 {
@@ -14,8 +14,8 @@ class HelloCommand implements CommandInterface
     protected $output;
 
     /**
-     * Each concrete command is builded with different receivers.
-     * Can be one, many, none or even other Command in parameters
+     * Each concrete command is built with different receivers.
+     * There can be one, many or completely no receivers, but there can be other commands in the parameters.
      *
      * @param Receiver $console
      */
@@ -25,7 +25,7 @@ class HelloCommand implements CommandInterface
     }
 
     /**
-     * execute and output "Hello World"
+     * execute and output "Hello World".
      */
     public function execute()
     {

Behavioral/Command/Invoker.php

@@ -4,7 +4,7 @@ namespace DesignPatterns\Behavioral\Command;
 
 /**
  * Invoker is using the command given to it.
- * Example : an Application in SF2
+ * Example : an Application in SF2.
  */
 class Invoker
 {
@@ -25,7 +25,7 @@ class Invoker
     }
 
     /**
-     * executes the command
+     * executes the command.
      */
     public function run()
     {

Behavioral/Command/Receiver.php

@@ -3,15 +3,44 @@
 namespace DesignPatterns\Behavioral\Command;
 
 /**
- * Receiver is specific service with its own contract and can be only concrete
+ * Receiver is specific service with its own contract and can be only concrete.
  */
 class Receiver
 {
+    private $enableDate = false;
+
+    private $output = array();
+
     /**
      * @param string $str
      */
     public function write($str)
     {
-        echo $str;
+        if ($this->enableDate) {
+            $str .= ' ['.date('Y-m-d').']';
+        }
+
+        $this->output[] = $str;
+    }
+
+    public function getOutput()
+    {
+        return implode("\n", $this->output);
+    }
+
+    /**
+     * Enable receiver to display message date.
+     */
+    public function enableDate()
+    {
+        $this->enableDate = true;
+    }
+
+    /**
+     * Disable receiver to display message date.
+     */
+    public function disableDate()
+    {
+        $this->enableDate = false;
     }
 }

Behavioral/Command/Tests/CommandTest.php

@@ -2,16 +2,15 @@
 
 namespace DesignPatterns\Behavioral\Command\Tests;
 
+use DesignPatterns\Behavioral\Command\HelloCommand;
 use DesignPatterns\Behavioral\Command\Invoker;
 use DesignPatterns\Behavioral\Command\Receiver;
-use DesignPatterns\Behavioral\Command\HelloCommand;
 
 /**
- * CommandTest has the role of the Client in the Command Pattern
+ * CommandTest has the role of the Client in the Command Pattern.
  */
 class CommandTest extends \PHPUnit_Framework_TestCase
 {
-
     /**
      * @var Invoker
      */
@@ -31,7 +30,7 @@ class CommandTest extends \PHPUnit_Framework_TestCase
     public function testInvocation()
     {
         $this->invoker->setCommand(new HelloCommand($this->receiver));
-        $this->expectOutputString('Hello World');
         $this->invoker->run();
+        $this->assertEquals($this->receiver->getOutput(), 'Hello World');
     }
 }

Behavioral/Command/Tests/UndoableCommandTest.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace DesignPatterns\Behavioral\Command\Tests;
+
+use DesignPatterns\Behavioral\Command\AddMessageDateCommand;
+use DesignPatterns\Behavioral\Command\HelloCommand;
+use DesignPatterns\Behavioral\Command\Invoker;
+use DesignPatterns\Behavioral\Command\Receiver;
+use PHPUnit_Framework_TestCase;
+
+/**
+ * UndoableCommandTest has the role of the Client in the Command Pattern.
+ */
+class UndoableCommandTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @var Invoker
+     */
+    protected $invoker;
+
+    /**
+     * @var Receiver
+     */
+    protected $receiver;
+
+    protected function setUp()
+    {
+        $this->invoker = new Invoker();
+        $this->receiver = new Receiver();
+    }
+
+    public function testInvocation()
+    {
+        $this->invoker->setCommand(new HelloCommand($this->receiver));
+        $this->invoker->run();
+        $this->assertEquals($this->receiver->getOutput(), 'Hello World');
+
+        $messageDateCommand = new AddMessageDateCommand($this->receiver);
+        $messageDateCommand->execute();
+
+        $this->invoker->run();
+        $this->assertEquals($this->receiver->getOutput(), "Hello World\nHello World [".date('Y-m-d').']');
+
+        $messageDateCommand->undo();
+
+        $this->invoker->run();
+        $this->assertEquals($this->receiver->getOutput(), "Hello World\nHello World [".date('Y-m-d')."]\nHello World");
+    }
+}

Behavioral/Command/UndoableCommandInterface.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace DesignPatterns\Behavioral\Command;
+
+/**
+ * Interface UndoableCommandInterface.
+ */
+interface UndoableCommandInterface extends CommandInterface
+{
+    /**
+     * This method is used to undo change made by command execution
+     * The Receiver goes in the constructor.
+     */
+    public function undo();
+}

Behavioral/Iterator/Book.php

@@ -4,7 +4,6 @@ namespace DesignPatterns\Behavioral\Iterator;
 
 class Book
 {
-
     private $author;
 
     private $title;
@@ -27,6 +26,6 @@ class Book
 
     public function getAuthorAndTitle()
     {
-        return $this->getTitle() . ' by ' . $this->getAuthor();
+        return $this->getTitle().' by '.$this->getAuthor();
     }
 }

Behavioral/Iterator/BookList.php

@@ -4,23 +4,20 @@ namespace DesignPatterns\Behavioral\Iterator;
 
 class BookList implements \Countable
 {
-
     private $books;
 
     public function getBook($bookNumberToGet)
     {
-        if ((int)$bookNumberToGet <= $this->count()) {
+        if (isset($this->books[$bookNumberToGet])) {
             return $this->books[$bookNumberToGet];
         }
 
-        return null;
+        return;
     }
 
     public function addBook(Book $book)
     {
         $this->books[] = $book;
-
-        return $this->count();
     }
 
     public function removeBook(Book $bookToRemove)
@@ -31,8 +28,6 @@ class BookList implements \Countable
                 unset($this->books[$key]);
             }
         }
-
-        return $this->count();
     }
 
     public function count()

Behavioral/Iterator/BookListIterator.php

@@ -4,11 +4,10 @@ namespace DesignPatterns\Behavioral\Iterator;
 
 class BookListIterator implements \Iterator
 {
-
     /**
      * @var BookList
      */
-    protected $bookList;
+    private $bookList;
 
     /**
      * @var int
@@ -21,8 +20,10 @@ class BookListIterator implements \Iterator
     }
 
     /**
-     * Return the current book
+     * Return the current book.
+     *
      * @link http://php.net/manual/en/iterator.current.php
+     *
      * @return Book Can return any type.
      */
     public function current()
@@ -32,8 +33,10 @@ class BookListIterator implements \Iterator
 
     /**
      * (PHP 5 &gt;= 5.0.0)<br/>
-     * Move forward to next element
+     * Move forward to next element.
+     *
      * @link http://php.net/manual/en/iterator.next.php
+     *
      * @return void Any returned value is ignored.
      */
     public function next()
@@ -43,8 +46,10 @@ class BookListIterator implements \Iterator
 
     /**
      * (PHP 5 &gt;= 5.0.0)<br/>
-     * Return the key of the current element
+     * Return the key of the current element.
+     *
      * @link http://php.net/manual/en/iterator.key.php
+     *
      * @return mixed scalar on success, or null on failure.
      */
     public function key()
@@ -54,20 +59,24 @@ class BookListIterator implements \Iterator
 
     /**
      * (PHP 5 &gt;= 5.0.0)<br/>
-     * Checks if current position is valid
+     * Checks if current position is valid.
+     *
      * @link http://php.net/manual/en/iterator.valid.php
-     * @return boolean The return value will be casted to boolean and then evaluated.
-     *       Returns true on success or false on failure.
+     *
+     * @return bool The return value will be casted to boolean and then evaluated.
+     *              Returns true on success or false on failure.
      */
     public function valid()
     {
-        return $this->currentBook < $this->bookList->count();
+        return null !== $this->bookList->getBook($this->currentBook);
     }
 
     /**
      * (PHP 5 &gt;= 5.0.0)<br/>
-     * Rewind the Iterator to the first element
+     * Rewind the Iterator to the first element.
+     *
      * @link http://php.net/manual/en/iterator.rewind.php
+     *
      * @return void Any returned value is ignored.
      */
     public function rewind()

Behavioral/Iterator/BookListReverseIterator.php

@@ -2,8 +2,17 @@
 
 namespace DesignPatterns\Behavioral\Iterator;
 
-class BookListReverseIterator extends BookListIterator
+class BookListReverseIterator implements \Iterator
 {
+    /**
+     * @var BookList
+     */
+    private $bookList;
+
+    /**
+     * @var int
+     */
+    protected $currentBook = 0;
 
     public function __construct(BookList $bookList)
     {
@@ -11,13 +20,68 @@ class BookListReverseIterator extends BookListIterator
         $this->currentBook = $this->bookList->count() - 1;
     }
 
+    /**
+     * Return the current book.
+     *
+     * @link http://php.net/manual/en/iterator.current.php
+     *
+     * @return Book Can return any type.
+     */
+    public function current()
+    {
+        return $this->bookList->getBook($this->currentBook);
+    }
+
+    /**
+     * (PHP 5 &gt;= 5.0.0)<br/>
+     * Move forward to next element.
+     *
+     * @link http://php.net/manual/en/iterator.next.php
+     *
+     * @return void Any returned value is ignored.
+     */
     public function next()
     {
         $this->currentBook--;
     }
 
+    /**
+     * (PHP 5 &gt;= 5.0.0)<br/>
+     * Return the key of the current element.
+     *
+     * @link http://php.net/manual/en/iterator.key.php
+     *
+     * @return mixed scalar on success, or null on failure.
+     */
+    public function key()
+    {
+        return $this->currentBook;
+    }
+
+    /**
+     * (PHP 5 &gt;= 5.0.0)<br/>
+     * Checks if current position is valid.
+     *
+     * @link http://php.net/manual/en/iterator.valid.php
+     *
+     * @return bool The return value will be casted to boolean and then evaluated.
+     *              Returns true on success or false on failure.
+     */
     public function valid()
     {
-        return 0 <= $this->currentBook;
+        return null !== $this->bookList->getBook($this->currentBook);
+    }
+
+    /**
+     * (PHP 5 &gt;= 5.0.0)<br/>
+     * Rewind the Iterator to the first element.
+     *
+     * @link http://php.net/manual/en/iterator.rewind.php
+     *
+     * @return void Any returned value is ignored.
+     */
+    public function rewind()
+    {
+        $this->currentBook = $this->bookList->count() - 1;
     }
 }

Behavioral/Iterator/Tests/IteratorTest.php

@@ -9,7 +9,6 @@ use DesignPatterns\Behavioral\Iterator\BookListReverseIterator;
 
 class IteratorTest extends \PHPUnit_Framework_TestCase
 {
-
     /**
      * @var BookList
      */
@@ -30,8 +29,8 @@ class IteratorTest extends \PHPUnit_Framework_TestCase
                 array(
                     'Learning PHP Design Patterns by William Sanders',
                     'Professional Php Design Patterns by Aaron Saray',
-                    'Clean Code by Robert C. Martin'
-                )
+                    'Clean Code by Robert C. Martin',
+                ),
             ),
         );
     }
@@ -65,7 +64,7 @@ class IteratorTest extends \PHPUnit_Framework_TestCase
     }
 
     /**
-     * Test BookList Remove
+     * Test BookList Remove.
      */
     public function testBookRemove()
     {

Behavioral/Mediator/Colleague.php

@@ -9,12 +9,12 @@ namespace DesignPatterns\Behavioral\Mediator;
 abstract class Colleague
 {
     /**
-     * this ensures no change in subclasses
+     * this ensures no change in subclasses.
      *
      * @var MediatorInterface
      */
     private $mediator;
-    
+
     /**
      * @param MediatorInterface $medium
      */
@@ -25,6 +25,7 @@ abstract class Colleague
     }
 
     // for subclasses
+
     protected function getMediator()
     {
         return $this->mediator;

Behavioral/Mediator/Mediator.php

@@ -2,15 +2,12 @@
 
 namespace DesignPatterns\Behavioral\Mediator;
 
-use DesignPatterns\Behavioral\Mediator\Subsystem;
-
 /**
  * Mediator is the concrete Mediator for this design pattern.
  * In this example, I have made a "Hello World" with the Mediator Pattern.
  */
 class Mediator implements MediatorInterface
 {
-
     /**
      * @var Subsystem\Server
      */
@@ -39,7 +36,7 @@ class Mediator implements MediatorInterface
     }
 
     /**
-     * make request
+     * make request.
      */
     public function makeRequest()
     {
@@ -47,7 +44,8 @@ class Mediator implements MediatorInterface
     }
 
     /**
-     * query db
+     * query db.
+     *
      * @return mixed
      */
     public function queryDb()
@@ -56,7 +54,7 @@ class Mediator implements MediatorInterface
     }
 
     /**
-     * send response
+     * send response.
      *
      * @param string $content
      */

Behavioral/Mediator/MediatorInterface.php

@@ -4,24 +4,24 @@ namespace DesignPatterns\Behavioral\Mediator;
 
 /**
  * MediatorInterface is a contract for the Mediator
- * This interface is not mandatory but it is better for LSP concerns
+ * This interface is not mandatory but it is better for LSP concerns.
  */
 interface MediatorInterface
 {
     /**
-     * sends the response
+     * sends the response.
      *
      * @param string $content
      */
     public function sendResponse($content);
 
     /**
-     * makes a request
+     * makes a request.
      */
     public function makeRequest();
 
     /**
-     * queries the DB
+     * queries the DB.
      */
     public function queryDb();
 }

Behavioral/Mediator/README.rst

@@ -4,8 +4,8 @@
 Purpose
 -------
 
-This pattern provides an easy to decouple many components working
-together. It is a good alternative over Observer IF you have a "central
+This pattern provides an easy way to decouple many components working
+together. It is a good alternative to Observer IF you have a "central
 intelligence", like a controller (but not in the sense of the MVC).
 
 All components (called Colleague) are only coupled to the
@@ -70,4 +70,4 @@ Tests/MediatorTest.php
    :linenos:
 
 .. _`GitHub`: https://github.com/domnikl/DesignPatternsPHP/tree/master/Behavioral/Mediator
-.. __: http://en.wikipedia.org/wiki/Mediator_pattern
+.. __: http://en.wikipedia.org/wiki/Mediator_pattern

Behavioral/Mediator/Subsystem/Client.php

@@ -5,12 +5,12 @@ namespace DesignPatterns\Behavioral\Mediator\Subsystem;
 use DesignPatterns\Behavioral\Mediator\Colleague;
 
 /**
- * Client is a client that make request et get response
+ * Client is a client that make request et get response.
  */
 class Client extends Colleague
 {
     /**
-     * request
+     * request.
      */
     public function request()
     {
@@ -18,7 +18,7 @@ class Client extends Colleague
     }
 
     /**
-     * output content
+     * output content.
      *
      * @param string $content
      */

Behavioral/Mediator/Subsystem/Database.php

@@ -5,7 +5,7 @@ namespace DesignPatterns\Behavioral\Mediator\Subsystem;
 use DesignPatterns\Behavioral\Mediator\Colleague;
 
 /**
- * Database is a database service
+ * Database is a database service.
  */
 class Database extends Colleague
 {
@@ -14,6 +14,6 @@ class Database extends Colleague
      */
     public function getData()
     {
-        return "World";
+        return 'World';
     }
 }

Behavioral/Mediator/Subsystem/Server.php

@@ -5,12 +5,12 @@ namespace DesignPatterns\Behavioral\Mediator\Subsystem;
 use DesignPatterns\Behavioral\Mediator\Colleague;
 
 /**
- * Server serves responses
+ * Server serves responses.
  */
 class Server extends Colleague
 {
     /**
-     * process on server
+     * process on server.
      */
     public function process()
     {

Behavioral/Mediator/Tests/MediatorTest.php

@@ -3,16 +3,15 @@
 namespace DesignPatterns\Tests\Mediator\Tests;
 
 use DesignPatterns\Behavioral\Mediator\Mediator;
-use DesignPatterns\Behavioral\Mediator\Subsystem\Database;
 use DesignPatterns\Behavioral\Mediator\Subsystem\Client;
+use DesignPatterns\Behavioral\Mediator\Subsystem\Database;
 use DesignPatterns\Behavioral\Mediator\Subsystem\Server;
 
 /**
- * MediatorTest tests hello world
+ * MediatorTest tests hello world.
  */
 class MediatorTest extends \PHPUnit_Framework_TestCase
 {
-
     protected $client;
 
     protected function setUp()

Behavioral/Memento/Caretaker.php

@@ -4,30 +4,46 @@ namespace DesignPatterns\Behavioral\Memento;
 
 class Caretaker
 {
-    public static function run()
+    protected $history = array();
+
+    /**
+     * @return Memento
+     */
+    public function getFromHistory($id)
     {
-        /* @var $savedStates Memento[] */
+        return $this->history[$id];
+    }
 
-        $savedStates = array();
+    /**
+     * @param Memento $state
+     */
+    public function saveToHistory(Memento $state)
+    {
+        $this->history[] = $state;
+    }
 
+    public function runCustomLogic()
+    {
         $originator = new Originator();
 
         //Setting state to State1
-        $originator->setState("State1");
+        $originator->setState('State1');
         //Setting state to State2
-        $originator->setState("State2");
+        $originator->setState('State2');
         //Saving State2 to Memento
-        $savedStates[] = $originator->saveToMemento();
+        $this->saveToHistory($originator->getStateAsMemento());
         //Setting state to State3
-        $originator->setState("State3");
+        $originator->setState('State3');
 
         // We can request multiple mementos, and choose which one to roll back to.
         // Saving State3 to Memento
-        $savedStates[] = $originator->saveToMemento();
+        $this->saveToHistory($originator->getStateAsMemento());
         //Setting state to State4
-        $originator->setState("State4");
+        $originator->setState('State4');
 
-        $originator->restoreFromMemento($savedStates[1]);
+        $originator->restoreFromMemento($this->getFromHistory(1));
         //State after restoring from Memento: State3
+
+        return $originator->getStateAsMemento()->getState();
     }
 }

Behavioral/Memento/Originator.php

@@ -15,14 +15,17 @@ class Originator
      */
     public function setState($state)
     {
+        // you must check type of state inside child of this class
+        // or use type-hinting for full pattern implementation
         $this->state = $state;
     }
 
     /**
      * @return Memento
      */
-    public function saveToMemento()
+    public function getStateAsMemento()
     {
+        // you must save a separate copy in Memento
         $state = is_object($this->state) ? clone $this->state : $this->state;
 
         return new Memento($state);

Behavioral/Memento/README.rst

@@ -4,26 +4,43 @@
 Purpose
 -------
 
-Provide the ability to restore an object to its previous state (undo via
-rollback).
+It provides the ability to restore an object to it's previous state (undo
+via rollback) or to gain access to state of the object, without revealing
+it's implementation (i.e., the object is not required to have a functional
+for return the current state).
 
-The memento pattern is implemented with three objects: the originator, a
-caretaker and a memento. The originator is some object that has an
-internal state. The caretaker is going to do something to the
-originator, but wants to be able to undo the change. The caretaker first
-asks the originator for a memento object. Then it does whatever
-operation (or sequence of operations) it was going to do. To roll back
-to the state before the operations, it returns the memento object to the
-originator. The memento object itself is an opaque object (one which the
-caretaker cannot, or should not, change). When using this pattern, care
-should be taken if the originator may change other objects or resources
-- the memento pattern operates on a single object.
+The memento pattern is implemented with three objects: the Originator, a
+Caretaker and a Memento.
+
+Memento – an object that *contains a concrete unique snapshot of state* of
+any object or resource: string, number, array, an instance of class and so on.
+The uniqueness in this case does not imply the prohibition existence of similar
+states in different snapshots. That means the state can be extracted as
+the independent clone. Any object stored in the Memento should be
+*a full copy of the original object rather than a reference* to the original
+object. The Memento object is a "opaque object" (the object that no one can
+or should change).
+
+Originator – it is an object that contains the *actual state of an external
+object is strictly specified type*. Originator is able to create a unique
+copy of this state and return it wrapped in a Memento. The Originator does
+not know the history of changes. You can set a concrete state to Originator
+from the outside, which will be considered as actual. The Originator must
+make sure that given state corresponds the allowed type of object. Originator
+may (but not should) have any methods, but they *they can't make changes to
+the saved object state*.
+
+Caretaker *controls the states history*. He may make changes to an object;
+take a decision to save the state of an external object in the Originator;
+ask from the Originator snapshot of the current state; or set the Originator
+state to equivalence with some snapshot from history.
 
 Examples
 --------
 
 -  The seed of a pseudorandom number generator
 -  The state in a finite state machine
+-  Control for intermediate states of `ORM Model <http://en.wikipedia.org/wiki/Object-relational_mapping>`_ before saving
 
 UML Diagram
 -----------

Behavioral/Memento/Tests/MementoTest.php

@@ -2,68 +2,161 @@
 
 namespace DesignPatterns\Behavioral\Memento\Tests;
 
+use DesignPatterns\Behavioral\Memento\Caretaker;
+use DesignPatterns\Behavioral\Memento\Memento;
 use DesignPatterns\Behavioral\Memento\Originator;
 
 /**
- * MementoTest tests the memento pattern
+ * MementoTest tests the memento pattern.
  */
 class MementoTest extends \PHPUnit_Framework_TestCase
 {
+    public function testUsageExample()
+    {
+        $originator = new Originator();
+        $caretaker = new Caretaker();
+
+        $character = new \stdClass();
+        // new object
+        $character->name = 'Gandalf';
+        // connect Originator to character object
+        $originator->setState($character);
+
+        // work on the object
+        $character->name = 'Gandalf the Grey';
+        // still change something
+        $character->race = 'Maia';
+        // time to save state
+        $snapshot = $originator->getStateAsMemento();
+        // put state to log
+        $caretaker->saveToHistory($snapshot);
+
+        // change something
+        $character->name = 'Sauron';
+        // and again
+        $character->race = 'Ainur';
+        // state inside the Originator was equally changed
+        $this->assertAttributeEquals($character, 'state', $originator);
+
+        // time to save another state
+        $snapshot = $originator->getStateAsMemento();
+        // put state to log
+        $caretaker->saveToHistory($snapshot);
+
+        $rollback = $caretaker->getFromHistory(0);
+        // return to first state
+        $originator->restoreFromMemento($rollback);
+        // use character from old state
+        $character = $rollback->getState();
+
+        // yes, that what we need
+        $this->assertEquals('Gandalf the Grey', $character->name);
+        // make new changes
+        $character->name = 'Gandalf the White';
+
+        // and Originator linked to actual object again
+        $this->assertAttributeEquals($character, 'state', $originator);
+    }
 
     public function testStringState()
     {
         $originator = new Originator();
-        $originator->setState("State1");
+        $originator->setState('State1');
 
-        $this->assertAttributeEquals("State1", "state", $originator);
+        $this->assertAttributeEquals('State1', 'state', $originator);
 
-        $originator->setState("State2");
+        $originator->setState('State2');
+        $this->assertAttributeEquals('State2', 'state', $originator);
 
-        $this->assertAttributeEquals("State2", "state", $originator);
+        $snapshot = $originator->getStateAsMemento();
+        $this->assertAttributeEquals('State2', 'state', $snapshot);
 
-        $savedState = $originator->saveToMemento();
+        $originator->setState('State3');
+        $this->assertAttributeEquals('State3', 'state', $originator);
 
-        $this->assertAttributeEquals("State2", "state", $savedState);
-
-        $originator->setState("State3");
-
-        $this->assertAttributeEquals("State3", "state", $originator);
-
-        $originator->restoreFromMemento($savedState);
-
-        $this->assertAttributeEquals("State2", "state", $originator);
+        $originator->restoreFromMemento($snapshot);
+        $this->assertAttributeEquals('State2', 'state', $originator);
     }
 
-    public function testObjectState()
+    public function testSnapshotIsClone()
+    {
+        $originator = new Originator();
+        $object = new \stdClass();
+
+        $originator->setState($object);
+        $snapshot = $originator->getStateAsMemento();
+        $object->new_property = 1;
+
+        $this->assertAttributeEquals($object, 'state', $originator);
+        $this->assertAttributeNotEquals($object, 'state', $snapshot);
+
+        $originator->restoreFromMemento($snapshot);
+        $this->assertAttributeNotEquals($object, 'state', $originator);
+    }
+
+    public function testCanChangeActualState()
+    {
+        $originator = new Originator();
+        $first_state = new \stdClass();
+
+        $originator->setState($first_state);
+        $snapshot = $originator->getStateAsMemento();
+        $second_state = $snapshot->getState();
+
+        // still actual
+        $first_state->first_property = 1;
+        // just history
+        $second_state->second_property = 2;
+        $this->assertAttributeEquals($first_state, 'state', $originator);
+        $this->assertAttributeNotEquals($second_state, 'state', $originator);
+
+        $originator->restoreFromMemento($snapshot);
+        // now it lost state
+        $first_state->first_property = 11;
+        // must be actual
+        $second_state->second_property = 22;
+        $this->assertAttributeEquals($second_state, 'state', $originator);
+        $this->assertAttributeNotEquals($first_state, 'state', $originator);
+    }
+
+    public function testStateWithDifferentObjects()
     {
         $originator = new Originator();
 
-        $foo       = new \stdClass();
-        $foo->data = "foo";
+        $first = new \stdClass();
+        $first->data = 'foo';
 
-        $originator->setState($foo);
+        $originator->setState($first);
+        $this->assertAttributeEquals($first, 'state', $originator);
 
-        $this->assertAttributeEquals($foo, "state", $originator);
+        $first_snapshot = $originator->getStateAsMemento();
+        $this->assertAttributeEquals($first, 'state', $first_snapshot);
 
-        $savedState = $originator->saveToMemento();
+        $second = new \stdClass();
+        $second->data = 'bar';
+        $originator->setState($second);
+        $this->assertAttributeEquals($second, 'state', $originator);
 
-        $this->assertAttributeEquals($foo, "state", $savedState);
+        $originator->restoreFromMemento($first_snapshot);
+        $this->assertAttributeEquals($first, 'state', $originator);
+    }
 
-        $bar       = new \stdClass();
-        $bar->data = "bar";
+    public function testCaretaker()
+    {
+        $caretaker = new Caretaker();
+        $memento1 = new Memento('foo');
+        $memento2 = new Memento('bar');
+        $caretaker->saveToHistory($memento1);
+        $caretaker->saveToHistory($memento2);
+        $this->assertAttributeEquals(array($memento1, $memento2), 'history', $caretaker);
+        $this->assertEquals($memento1, $caretaker->getFromHistory(0));
+        $this->assertEquals($memento2, $caretaker->getFromHistory(1));
+    }
 
-        $originator->setState($bar);
-
-        $this->assertAttributeEquals($bar, "state", $originator);
-
-        $originator->restoreFromMemento($savedState);
-
-        $this->assertAttributeEquals($foo, "state", $originator);
-
-        $foo->data = null;
-
-        $this->assertAttributeNotEquals($foo, "state", $savedState);
-
-        $this->assertAttributeNotEquals($foo, "state", $originator);
+    public function testCaretakerCustomLogic()
+    {
+        $caretaker = new Caretaker();
+        $result = $caretaker->runCustomLogic();
+        $this->assertEquals('State3', $result);
     }
 }

Behavioral/NullObject/LoggerInterface.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\NullObject;
 
 /**
- * LoggerInterface is a contract for logging something
+ * LoggerInterface is a contract for logging something.
  *
  * Key feature: NullLogger MUST inherit from this interface like any other Loggers
  */

Behavioral/NullObject/PrintLogger.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\NullObject;
 
 /**
- * PrintLogger is a logger that prints the log entry to standard output
+ * PrintLogger is a logger that prints the log entry to standard output.
  */
 class PrintLogger implements LoggerInterface
 {

Behavioral/NullObject/Service.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\NullObject;
 
 /**
- * Service is dummy service that uses a logger
+ * Service is dummy service that uses a logger.
  */
 class Service
 {
@@ -13,7 +13,7 @@ class Service
     protected $logger;
 
     /**
-     * we inject the logger in ctor and it is mandatory
+     * we inject the logger in ctor and it is mandatory.
      *
      * @param LoggerInterface $log
      */
@@ -28,7 +28,7 @@ class Service
     public function doSomething()
     {
         // no more check "if (!is_null($this->logger))..." with the NullObject pattern
-        $this->logger->log('We are in ' . __METHOD__);
+        $this->logger->log('We are in '.__METHOD__);
         // something to do...
     }
 }

Behavioral/NullObject/Tests/LoggerTest.php

@@ -3,15 +3,14 @@
 namespace DesignPatterns\Behavioral\NullObject\Tests;
 
 use DesignPatterns\Behavioral\NullObject\NullLogger;
-use DesignPatterns\Behavioral\NullObject\Service;
 use DesignPatterns\Behavioral\NullObject\PrintLogger;
+use DesignPatterns\Behavioral\NullObject\Service;
 
 /**
- * LoggerTest tests for different loggers
+ * LoggerTest tests for different loggers.
  */
 class LoggerTest extends \PHPUnit_Framework_TestCase
 {
-
     public function testNullObject()
     {
         // one can use a singleton for NullObjet : I don't think it's a good idea

Behavioral/Observer/Tests/ObserverTest.php

@@ -2,15 +2,14 @@
 
 namespace DesignPatterns\Behavioral\Observer\Tests;
 
-use DesignPatterns\Behavioral\Observer\UserObserver;
 use DesignPatterns\Behavioral\Observer\User;
+use DesignPatterns\Behavioral\Observer\UserObserver;
 
 /**
- * ObserverTest tests the Observer pattern
+ * ObserverTest tests the Observer pattern.
  */
 class ObserverTest extends \PHPUnit_Framework_TestCase
 {
-
     protected $observer;
 
     protected function setUp()
@@ -19,7 +18,7 @@ class ObserverTest extends \PHPUnit_Framework_TestCase
     }
 
     /**
-     * Tests the notification
+     * Tests the notification.
      */
     public function testNotify()
     {
@@ -31,7 +30,7 @@ class ObserverTest extends \PHPUnit_Framework_TestCase
     }
 
     /**
-     * Tests the subscribing
+     * Tests the subscribing.
      */
     public function testAttachDetach()
     {
@@ -53,7 +52,7 @@ class ObserverTest extends \PHPUnit_Framework_TestCase
     }
 
     /**
-     * Tests the update() invocation on a mockup
+     * Tests the update() invocation on a mockup.
      */
     public function testUpdateCalling()
     {

Behavioral/Observer/User.php

@@ -3,34 +3,33 @@
 namespace DesignPatterns\Behavioral\Observer;
 
 /**
- * Observer pattern : The observed object (the subject)
+ * Observer pattern : The observed object (the subject).
  *
  * The subject maintains a list of Observers and sends notifications.
- *
  */
 class User implements \SplSubject
 {
     /**
-     * user data
+     * user data.
      *
      * @var array
      */
     protected $data = array();
 
     /**
-     * observers
+     * observers.
      *
      * @var \SplObjectStorage
      */
     protected $observers;
-    
+
     public function __construct()
     {
         $this->observers = new \SplObjectStorage();
     }
 
     /**
-     * attach a new observer
+     * attach a new observer.
      *
      * @param \SplObserver $observer
      *
@@ -42,7 +41,7 @@ class User implements \SplSubject
     }
 
     /**
-     * detach an observer
+     * detach an observer.
      *
      * @param \SplObserver $observer
      *
@@ -54,7 +53,7 @@ class User implements \SplSubject
     }
 
     /**
-     * notify observers
+     * notify observers.
      *
      * @return void
      */
@@ -68,7 +67,7 @@ class User implements \SplSubject
 
     /**
      * Ideally one would better write setter/getter for all valid attributes and only call notify()
-     * on attributes that matter when changed
+     * on attributes that matter when changed.
      *
      * @param string $name
      * @param mixed  $value

Behavioral/Observer/UserObserver.php

@@ -3,18 +3,18 @@
 namespace DesignPatterns\Behavioral\Observer;
 
 /**
- * class UserObserver
+ * class UserObserver.
  */
 class UserObserver implements \SplObserver
 {
     /**
      * This is the only method to implement as an observer.
-     * It is called by the Subject (usually by SplSubject::notify() )
+     * It is called by the Subject (usually by SplSubject::notify() ).
      *
      * @param \SplSubject $subject
      */
     public function update(\SplSubject $subject)
     {
-        echo get_class($subject) . ' has been updated';
+        echo get_class($subject).' has been updated';
     }
 }

Behavioral/README.md

@@ -9,7 +9,7 @@ communication.
 * [Command](Command) [:notebook:](http://en.wikipedia.org/wiki/Command_pattern)
 * [Iterator](Iterator) [:notebook:](http://en.wikipedia.org/wiki/Iterator_pattern)
 * [Mediator](Mediator) [:notebook:](http://en.wikipedia.org/wiki/Mediator_pattern)
-* [Memento](Behavioral/Memento) [:notebook:](http://en.wikipedia.org/wiki/Memento_pattern)
+* [Memento](Memento) [:notebook:](http://en.wikipedia.org/wiki/Memento_pattern)
 * [NullObject](NullObject) [:notebook:](http://en.wikipedia.org/wiki/Null_Object_pattern)
 * [Observer](Observer) [:notebook:](http://en.wikipedia.org/wiki/Observer_pattern)
 * [Specification](Specification) [:notebook:](http://en.wikipedia.org/wiki/Specification_pattern)

Behavioral/Specification/AbstractSpecification.php

@@ -1,13 +1,14 @@
 <?php
+
 namespace DesignPatterns\Behavioral\Specification;
 
 /**
- * An abstract specification allows the creation of wrapped specifications
+ * An abstract specification allows the creation of wrapped specifications.
  */
 abstract class AbstractSpecification implements SpecificationInterface
 {
     /**
-     * Checks if given item meets all criteria
+     * Checks if given item meets all criteria.
      *
      * @param Item $item
      *
@@ -16,7 +17,7 @@ abstract class AbstractSpecification implements SpecificationInterface
     abstract public function isSatisfiedBy(Item $item);
 
     /**
-     * Creates a new logical AND specification
+     * Creates a new logical AND specification.
      *
      * @param SpecificationInterface $spec
      *
@@ -28,7 +29,7 @@ abstract class AbstractSpecification implements SpecificationInterface
     }
 
     /**
-     * Creates a new logical OR composite specification
+     * Creates a new logical OR composite specification.
      *
      * @param SpecificationInterface $spec
      *
@@ -40,7 +41,7 @@ abstract class AbstractSpecification implements SpecificationInterface
     }
 
     /**
-     * Creates a new logical NOT specification
+     * Creates a new logical NOT specification.
      *
      * @return SpecificationInterface
      */

Behavioral/Specification/Either.php

@@ -1,17 +1,17 @@
 <?php
+
 namespace DesignPatterns\Behavioral\Specification;
 
 /**
- * A logical OR specification
+ * A logical OR specification.
  */
 class Either extends AbstractSpecification
 {
-
     protected $left;
     protected $right;
 
     /**
-     * A composite wrapper of two specifications
+     * A composite wrapper of two specifications.
      *
      * @param SpecificationInterface $left
      * @param SpecificationInterface $right
@@ -23,7 +23,7 @@ class Either extends AbstractSpecification
     }
 
     /**
-     * Returns the evaluation of both wrapped specifications as a logical OR
+     * Returns the evaluation of both wrapped specifications as a logical OR.
      *
      * @param Item $item
      *

Behavioral/Specification/Item.php

@@ -1,15 +1,16 @@
 <?php
+
 namespace DesignPatterns\Behavioral\Specification;
 
 /**
- * An trivial item
+ * An trivial item.
  */
 class Item
 {
     protected $price;
 
     /**
-     * An item must have a price
+     * An item must have a price.
      *
      * @param int $price
      */
@@ -19,7 +20,7 @@ class Item
     }
 
     /**
-     * Get the items price
+     * Get the items price.
      *
      * @return int
      */

Behavioral/Specification/Not.php

@@ -1,16 +1,16 @@
 <?php
+
 namespace DesignPatterns\Behavioral\Specification;
 
 /**
- * A logical Not specification
+ * A logical Not specification.
  */
 class Not extends AbstractSpecification
 {
-
     protected $spec;
 
     /**
-     * Creates a new specification wrapping another
+     * Creates a new specification wrapping another.
      *
      * @param SpecificationInterface $spec
      */
@@ -20,7 +20,7 @@ class Not extends AbstractSpecification
     }
 
     /**
-     * Returns the negated result of the wrapped specification
+     * Returns the negated result of the wrapped specification.
      *
      * @param Item $item
      *

Behavioral/Specification/Plus.php

@@ -1,17 +1,17 @@
 <?php
+
 namespace DesignPatterns\Behavioral\Specification;
 
 /**
- * A logical AND specification
+ * A logical AND specification.
  */
 class Plus extends AbstractSpecification
 {
-
     protected $left;
     protected $right;
 
     /**
-     * Creation of a logical AND of two specifications
+     * Creation of a logical AND of two specifications.
      *
      * @param SpecificationInterface $left
      * @param SpecificationInterface $right
@@ -23,7 +23,7 @@ class Plus extends AbstractSpecification
     }
 
     /**
-     * Checks if the composite AND of specifications passes
+     * Checks if the composite AND of specifications passes.
      *
      * @param Item $item
      *

Behavioral/Specification/PriceSpecification.php

@@ -1,8 +1,9 @@
 <?php
+
 namespace DesignPatterns\Behavioral\Specification;
 
 /**
- * A specification to check an Item is priced between min and max
+ * A specification to check an Item is priced between min and max.
  */
 class PriceSpecification extends AbstractSpecification
 {
@@ -10,7 +11,7 @@ class PriceSpecification extends AbstractSpecification
     protected $minPrice;
 
     /**
-     * Sets the optional maximum price
+     * Sets the optional maximum price.
      *
      * @param int $maxPrice
      */
@@ -20,7 +21,7 @@ class PriceSpecification extends AbstractSpecification
     }
 
     /**
-     * Sets the optional minimum price
+     * Sets the optional minimum price.
      *
      * @param int $minPrice
      */
@@ -30,7 +31,7 @@ class PriceSpecification extends AbstractSpecification
     }
 
     /**
-     * Checks if Item price falls between bounds
+     * Checks if Item price falls between bounds.
      *
      * @param Item $item
      *

Behavioral/Specification/SpecificationInterface.php

@@ -1,13 +1,14 @@
 <?php
+
 namespace DesignPatterns\Behavioral\Specification;
 
 /**
- * An interface for a specification
+ * An interface for a specification.
  */
 interface SpecificationInterface
 {
     /**
-     * A boolean evaluation indicating if the object meets the specification
+     * A boolean evaluation indicating if the object meets the specification.
      *
      * @param Item $item
      *
@@ -16,21 +17,21 @@ interface SpecificationInterface
     public function isSatisfiedBy(Item $item);
 
     /**
-     * Creates a logical AND specification
+     * Creates a logical AND specification.
      *
      * @param SpecificationInterface $spec
      */
     public function plus(SpecificationInterface $spec);
 
     /**
-     * Creates a logical OR specification
+     * Creates a logical OR specification.
      *
      * @param SpecificationInterface $spec
      */
     public function either(SpecificationInterface $spec);
 
     /**
-     * Creates a logical not specification
+     * Creates a logical not specification.
      */
     public function not();
 }

Behavioral/Specification/Tests/SpecificationTest.php

@@ -2,11 +2,11 @@
 
 namespace DesignPatterns\Behavioral\Specification\Tests;
 
-use DesignPatterns\Behavioral\Specification\PriceSpecification;
 use DesignPatterns\Behavioral\Specification\Item;
+use DesignPatterns\Behavioral\Specification\PriceSpecification;
 
 /**
- * SpecificationTest tests the specification pattern
+ * SpecificationTest tests the specification pattern.
  */
 class SpecificationTest extends \PHPUnit_Framework_TestCase
 {

Behavioral/State/CreateOrder.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\State;
 
 /**
- * Class CreateOrder
+ * Class CreateOrder.
  */
 class CreateOrder implements OrderInterface
 {
@@ -38,8 +38,9 @@ class CreateOrder implements OrderInterface
     }
 
     /**
-     * @return mixed|void
      * @throws \Exception
+     *
+     * @return mixed|void
      */
     public function completeOrder()
     {

Behavioral/State/OrderController.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\State;
 
 /**
- * Class OrderController
+ * Class OrderController.
  */
 class OrderController
 {

Behavioral/State/OrderFactory.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\State;
 
 /**
- * Class OrderFactory
+ * Class OrderFactory.
  */
 class OrderFactory
 {
@@ -15,8 +15,9 @@ class OrderFactory
     /**
      * @param int $id
      *
-     * @return CreateOrder|ShippingOrder
      * @throws \Exception
+     *
+     * @return CreateOrder|ShippingOrder
      */
     public static function getOrder($id)
     {

Behavioral/State/OrderInterface.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\State;
 
 /**
- * Class OrderInterface
+ * Class OrderInterface.
  */
 interface OrderInterface
 {

Behavioral/State/ShippingOrder.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\State;
 
 /**
- * Class ShippingOrder
+ * Class ShippingOrder.
  */
 class ShippingOrder implements OrderInterface
 {
@@ -26,8 +26,9 @@ class ShippingOrder implements OrderInterface
     }
 
     /**
-     * @return mixed|void
      * @throws \Exception
+     *
+     * @return mixed|void
      */
     public function shipOrder()
     {

Behavioral/Strategy/ComparatorInterface.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\Strategy;
 
 /**
- * Class ComparatorInterface
+ * Class ComparatorInterface.
  */
 interface ComparatorInterface
 {

Behavioral/Strategy/DateComparator.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\Strategy;
 
 /**
- * Class DateComparator
+ * Class DateComparator.
  */
 class DateComparator implements ComparatorInterface
 {

Behavioral/Strategy/IdComparator.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\Strategy;
 
 /**
- * Class IdComparator
+ * Class IdComparator.
  */
 class IdComparator implements ComparatorInterface
 {

Behavioral/Strategy/ObjectCollection.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\Strategy;
 
 /**
- * Class ObjectCollection
+ * Class ObjectCollection.
  */
 class ObjectCollection
 {
@@ -31,7 +31,7 @@ class ObjectCollection
     public function sort()
     {
         if (!$this->comparator) {
-            throw new \LogicException("Comparator is not set");
+            throw new \LogicException('Comparator is not set');
         }
 
         $callback = array($this->comparator, 'compare');

Behavioral/Strategy/Tests/StrategyTest.php

@@ -8,21 +8,20 @@ use DesignPatterns\Behavioral\Strategy\ObjectCollection;
 use DesignPatterns\Behavioral\Strategy\Strategy;
 
 /**
- * Tests for Strategy pattern
+ * Tests for Strategy pattern.
  */
 class StrategyTest extends \PHPUnit_Framework_TestCase
 {
-
     public function getIdCollection()
     {
         return array(
             array(
                 array(array('id' => 2), array('id' => 1), array('id' => 3)),
-                array('id' => 1)
+                array('id' => 1),
             ),
             array(
                 array(array('id' => 3), array('id' => 2), array('id' => 1)),
-                array('id' => 1)
+                array('id' => 1),
             ),
         );
     }
@@ -32,11 +31,11 @@ class StrategyTest extends \PHPUnit_Framework_TestCase
         return array(
             array(
                 array(array('date' => '2014-03-03'), array('date' => '2015-03-02'), array('date' => '2013-03-01')),
-                array('date' => '2013-03-01')
+                array('date' => '2013-03-01'),
             ),
             array(
                 array(array('date' => '2014-02-03'), array('date' => '2013-02-01'), array('date' => '2015-02-02')),
-                array('date' => '2013-02-01')
+                array('date' => '2013-02-01'),
             ),
         );
     }

Behavioral/TemplateMethod/BeachJourney.php

@@ -3,12 +3,12 @@
 namespace DesignPatterns\Behavioral\TemplateMethod;
 
 /**
- * BeachJourney is vacation at the beach
+ * BeachJourney is vacation at the beach.
  */
 class BeachJourney extends Journey
 {
     /**
-     * prints what to do to enjoy your vacation
+     * prints what to do to enjoy your vacation.
      */
     protected function enjoyVacation()
     {

Behavioral/TemplateMethod/CityJourney.php

@@ -3,12 +3,12 @@
 namespace DesignPatterns\Behavioral\TemplateMethod;
 
 /**
- * CityJourney is a journey in a city
+ * CityJourney is a journey in a city.
  */
 class CityJourney extends Journey
 {
     /**
-     * prints what to do in your journey to enjoy vacation
+     * prints what to do in your journey to enjoy vacation.
      */
     protected function enjoyVacation()
     {

Behavioral/TemplateMethod/Journey.php

@@ -23,7 +23,7 @@ abstract class Journey
     }
 
     /**
-     * This method must be implemented, this is the key-feature of this pattern
+     * This method must be implemented, this is the key-feature of this pattern.
      */
     abstract protected function enjoyVacation();
 
@@ -37,7 +37,7 @@ abstract class Journey
     }
 
     /**
-     * This method will be unknown by subclasses (better)
+     * This method will be unknown by subclasses (better).
      */
     private function buyAFlight()
     {
@@ -46,7 +46,7 @@ abstract class Journey
 
     /**
      * Subclasses will get access to this method but cannot override it and
-     * compromise this algorithm (warning : cause of cyclic dependencies)
+     * compromise this algorithm (warning : cause of cyclic dependencies).
      */
     final protected function takePlane()
     {

Behavioral/TemplateMethod/Tests/JourneyTest.php

@@ -5,11 +5,10 @@ namespace DesignPatterns\Behavioral\TemplateMethod\Tests;
 use DesignPatterns\Behavioral\TemplateMethod;
 
 /**
- * JourneyTest tests all journeys
+ * JourneyTest tests all journeys.
  */
 class JourneyTest extends \PHPUnit_Framework_TestCase
 {
-
     public function testBeach()
     {
         $journey = new TemplateMethod\BeachJourney();
@@ -25,7 +24,7 @@ class JourneyTest extends \PHPUnit_Framework_TestCase
     }
 
     /**
-     * How to test an abstract template method with PHPUnit
+     * How to test an abstract template method with PHPUnit.
      */
     public function testLasVegas()
     {

Behavioral/Visitor/Group.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\Visitor;
 
 /**
- * An example of a Visitor: Group
+ * An example of a Visitor: Group.
  */
 class Group extends Role
 {
@@ -25,6 +25,6 @@ class Group extends Role
      */
     public function getName()
     {
-        return "Group: " . $this->name;
+        return 'Group: '.$this->name;
     }
 }

Behavioral/Visitor/Role.php

@@ -3,12 +3,12 @@
 namespace DesignPatterns\Behavioral\Visitor;
 
 /**
- * class Role
+ * class Role.
  */
 abstract class Role
 {
     /**
-     * This method handles a double dispatch based on the short name of the Visitor
+     * This method handles a double dispatch based on the short name of the Visitor.
      *
      * Feel free to override it if your object must call another visiting behavior
      *
@@ -21,10 +21,10 @@ abstract class Role
         // this trick to simulate double-dispatch based on type-hinting
         $klass = get_called_class();
         preg_match('#([^\\\\]+)$#', $klass, $extract);
-        $visitingMethod = 'visit' . $extract[1];
+        $visitingMethod = 'visit'.$extract[1];
 
         // this ensures strong typing with visitor interface, not some visitor objects
-        if (!method_exists(__NAMESPACE__ . '\RoleVisitorInterface', $visitingMethod)) {
+        if (!method_exists(__NAMESPACE__.'\RoleVisitorInterface', $visitingMethod)) {
             throw new \InvalidArgumentException("The visitor you provide cannot visit a $klass instance");
         }
 

Behavioral/Visitor/RolePrintVisitor.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\Visitor;
 
 /**
- * Visitor Pattern
+ * Visitor Pattern.
  *
  * An implementation of a concrete Visitor
  */
@@ -14,7 +14,7 @@ class RolePrintVisitor implements RoleVisitorInterface
      */
     public function visitGroup(Group $role)
     {
-        echo "Role: " . $role->getName();
+        echo 'Role: '.$role->getName();
     }
 
     /**
@@ -22,6 +22,6 @@ class RolePrintVisitor implements RoleVisitorInterface
      */
     public function visitUser(User $role)
     {
-        echo "Role: " . $role->getName();
+        echo 'Role: '.$role->getName();
     }
 }

Behavioral/Visitor/RoleVisitorInterface.php

@@ -3,11 +3,11 @@
 namespace DesignPatterns\Behavioral\Visitor;
 
 /**
- * Visitor Pattern
+ * Visitor Pattern.
  *
  * The contract for the visitor.
  *
- * Note 1 : in C++ or java, with method polymorphism based on type-hint, there are many
+ * Note 1 : in C++ or Java, with method polymorphism based on type-hint, there are many
  * methods visit() with different type for the 'role' parameter.
  *
  * Note 2 : the visitor must not choose itself which method to
@@ -16,14 +16,14 @@ namespace DesignPatterns\Behavioral\Visitor;
 interface RoleVisitorInterface
 {
     /**
-     * Visit a User object
+     * Visit a User object.
      *
      * @param \DesignPatterns\Behavioral\Visitor\User $role
      */
     public function visitUser(User $role);
 
     /**
-     * Visit a Group object
+     * Visit a Group object.
      *
      * @param \DesignPatterns\Behavioral\Visitor\Group $role
      */

Behavioral/Visitor/Tests/VisitorTest.php

@@ -5,11 +5,10 @@ namespace DesignPatterns\Tests\Visitor\Tests;
 use DesignPatterns\Behavioral\Visitor;
 
 /**
- * VisitorTest tests the visitor pattern
+ * VisitorTest tests the visitor pattern.
  */
 class VisitorTest extends \PHPUnit_Framework_TestCase
 {
-
     protected $visitor;
 
     protected function setUp()
@@ -20,8 +19,8 @@ class VisitorTest extends \PHPUnit_Framework_TestCase
     public function getRole()
     {
         return array(
-            array(new Visitor\User("Dominik"), 'Role: User Dominik'),
-            array(new Visitor\Group("Administrators"), 'Role: Group: Administrators')
+            array(new Visitor\User('Dominik'), 'Role: User Dominik'),
+            array(new Visitor\Group('Administrators'), 'Role: Group: Administrators'),
         );
     }
 

Behavioral/Visitor/User.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Behavioral\Visitor;
 
 /**
- * Visitor Pattern
+ * Visitor Pattern.
  *
  * One example for a visitee. Each visitee has to extends Role
  */
@@ -27,6 +27,6 @@ class User extends Role
      */
     public function getName()
     {
-        return "User " . $this->name;
+        return 'User '.$this->name;
     }
 }

Creational/AbstractFactory/AbstractFactory.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\AbstractFactory;
 
 /**
- * class AbstractFactory
+ * class AbstractFactory.
  *
  * Sometimes also known as "Kit" in a GUI libraries.
  *
@@ -20,7 +20,7 @@ namespace DesignPatterns\Creational\AbstractFactory;
 abstract class AbstractFactory
 {
     /**
-     * Creates a text component
+     * Creates a text component.
      *
      * @param string $content
      *
@@ -29,7 +29,7 @@ abstract class AbstractFactory
     abstract public function createText($content);
 
     /**
-     * Creates a picture component
+     * Creates a picture component.
      *
      * @param string $path
      * @param string $name

Creational/AbstractFactory/Html/Picture.php

@@ -5,14 +5,14 @@ namespace DesignPatterns\Creational\AbstractFactory\Html;
 use DesignPatterns\Creational\AbstractFactory\Picture as BasePicture;
 
 /**
- * Class Picture
+ * Class Picture.
  *
  * Picture is a concrete image for HTML rendering
  */
 class Picture extends BasePicture
 {
     /**
-     * some crude rendering from HTML output
+     * some crude rendering from HTML output.
      *
      * @return string
      */

Creational/AbstractFactory/Html/Text.php

@@ -5,19 +5,19 @@ namespace DesignPatterns\Creational\AbstractFactory\Html;
 use DesignPatterns\Creational\AbstractFactory\Text as BaseText;
 
 /**
- * Class Text
+ * Class Text.
  *
  * Text is a concrete text for HTML rendering
  */
 class Text extends BaseText
 {
     /**
-     * some crude rendering from HTML output
+     * some crude rendering from HTML output.
      *
      * @return string
      */
     public function render()
     {
-        return '<div>' . htmlspecialchars($this->text) . '</div>';
+        return '<div>'.htmlspecialchars($this->text).'</div>';
     }
 }

Creational/AbstractFactory/HtmlFactory.php

@@ -3,14 +3,14 @@
 namespace DesignPatterns\Creational\AbstractFactory;
 
 /**
- * Class HtmlFactory
+ * Class HtmlFactory.
  *
  * HtmlFactory is a concrete factory for HTML component
  */
 class HtmlFactory extends AbstractFactory
 {
     /**
-     * Creates a picture component
+     * Creates a picture component.
      *
      * @param string $path
      * @param string $name
@@ -23,7 +23,7 @@ class HtmlFactory extends AbstractFactory
     }
 
     /**
-     * Creates a text component
+     * Creates a text component.
      *
      * @param string $content
      *

Creational/AbstractFactory/Json/Picture.php

@@ -5,14 +5,14 @@ namespace DesignPatterns\Creational\AbstractFactory\Json;
 use DesignPatterns\Creational\AbstractFactory\Picture as BasePicture;
 
 /**
- * Class Picture
+ * Class Picture.
  *
  * Picture is a concrete image for JSON rendering
  */
 class Picture extends BasePicture
 {
     /**
-     * some crude rendering from JSON output
+     * some crude rendering from JSON output.
      *
      * @return string
      */

Creational/AbstractFactory/Json/Text.php

@@ -5,14 +5,14 @@ namespace DesignPatterns\Creational\AbstractFactory\Json;
 use DesignPatterns\Creational\AbstractFactory\Text as BaseText;
 
 /**
- * Class Text
+ * Class Text.
  *
  * Text is a text component with a JSON rendering
  */
 class Text extends BaseText
 {
     /**
-     * some crude rendering from JSON output
+     * some crude rendering from JSON output.
      *
      * @return string
      */

Creational/AbstractFactory/JsonFactory.php

@@ -3,16 +3,15 @@
 namespace DesignPatterns\Creational\AbstractFactory;
 
 /**
- * Class JsonFactory
+ * Class JsonFactory.
  *
  * JsonFactory is a factory for creating a family of JSON component
  * (example for ajax)
  */
 class JsonFactory extends AbstractFactory
 {
-
     /**
-     * Creates a picture component
+     * Creates a picture component.
      *
      * @param string $path
      * @param string $name
@@ -25,7 +24,7 @@ class JsonFactory extends AbstractFactory
     }
 
     /**
-     * Creates a text component
+     * Creates a text component.
      *
      * @param string $content
      *

Creational/AbstractFactory/MediaInterface.php

@@ -3,16 +3,15 @@
 namespace DesignPatterns\Creational\AbstractFactory;
 
 /**
- * Interface MediaInterface
+ * Interface MediaInterface.
  *
  * This contract is not part of the pattern, in general case, each component
  * are not related
  */
 interface MediaInterface
 {
-
     /**
-     * some crude rendering from JSON or html output (depended on concrete class)
+     * some crude rendering from JSON or html output (depended on concrete class).
      *
      * @return string
      */

Creational/AbstractFactory/Picture.php

@@ -3,11 +3,10 @@
 namespace DesignPatterns\Creational\AbstractFactory;
 
 /**
- * Class Picture
+ * Class Picture.
  */
 abstract class Picture implements MediaInterface
 {
-
     /**
      * @var string
      */

Creational/AbstractFactory/Tests/AbstractFactoryTest.php

@@ -7,7 +7,7 @@ use DesignPatterns\Creational\AbstractFactory\HtmlFactory;
 use DesignPatterns\Creational\AbstractFactory\JsonFactory;
 
 /**
- * AbstractFactoryTest tests concrete factories
+ * AbstractFactoryTest tests concrete factories.
  */
 class AbstractFactoryTest extends \PHPUnit_Framework_TestCase
 {
@@ -15,7 +15,7 @@ class AbstractFactoryTest extends \PHPUnit_Framework_TestCase
     {
         return array(
             array(new JsonFactory()),
-            array(new HtmlFactory())
+            array(new HtmlFactory()),
         );
     }
 
@@ -31,7 +31,7 @@ class AbstractFactoryTest extends \PHPUnit_Framework_TestCase
         $article = array(
             $factory->createText('Lorem Ipsum'),
             $factory->createPicture('/image.jpg', 'caption'),
-            $factory->createText('footnotes')
+            $factory->createText('footnotes'),
         );
 
         $this->assertContainsOnly('DesignPatterns\Creational\AbstractFactory\MediaInterface', $article);

Creational/AbstractFactory/Text.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\AbstractFactory;
 
 /**
- * Class Text
+ * Class Text.
  */
 abstract class Text implements MediaInterface
 {

Creational/Builder/BikeBuilder.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\Builder;
 
 /**
- * BikeBuilder builds bike
+ * BikeBuilder builds bike.
  */
 class BikeBuilder implements BuilderInterface
 {

Creational/Builder/CarBuilder.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\Builder;
 
 /**
- * CarBuilder builds car
+ * CarBuilder builds car.
  */
 class CarBuilder implements BuilderInterface
 {

Creational/Builder/Director.php

@@ -10,9 +10,8 @@ namespace DesignPatterns\Creational\Builder;
  */
 class Director
 {
-
     /**
-     * The director don't know 'bout concrete part
+     * The director don't know about concrete part.
      *
      * @param BuilderInterface $builder
      *

Creational/Builder/Parts/Bike.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\Builder\Parts;
 
 /**
- * Bike is a bike
+ * Bike is a bike.
  */
 class Bike extends Vehicle
 {

Creational/Builder/Parts/Car.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\Builder\Parts;
 
 /**
- * Car is a car
+ * Car is a car.
  */
 class Car extends Vehicle
 {

Creational/Builder/Parts/Door.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\Builder\Parts;
 
 /**
- * Class Door
+ * Class Door.
  */
 class Door
 {

Creational/Builder/Parts/Engine.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\Builder\Parts;
 
 /**
- * Class Engine
+ * Class Engine.
  */
 class Engine
 {

Creational/Builder/Parts/Vehicle.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\Builder\Parts;
 
 /**
- * VehicleInterface is a contract for a vehicle
+ * Vehicle class is an abstraction for a vehicle.
  */
 abstract class Vehicle
 {

Creational/Builder/Parts/Wheel.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\Builder\Parts;
 
 /**
- * Class Wheel
+ * Class Wheel.
  */
 class Wheel
 {

Creational/Builder/Tests/DirectorTest.php

@@ -2,17 +2,16 @@
 
 namespace DesignPatterns\Creational\Builder\Tests;
 
-use DesignPatterns\Creational\Builder\Director;
-use DesignPatterns\Creational\Builder\CarBuilder;
 use DesignPatterns\Creational\Builder\BikeBuilder;
 use DesignPatterns\Creational\Builder\BuilderInterface;
+use DesignPatterns\Creational\Builder\CarBuilder;
+use DesignPatterns\Creational\Builder\Director;
 
 /**
- * DirectorTest tests the builder pattern
+ * DirectorTest tests the builder pattern.
  */
 class DirectorTest extends \PHPUnit_Framework_TestCase
 {
-
     protected $director;
 
     protected function setUp()
@@ -24,7 +23,7 @@ class DirectorTest extends \PHPUnit_Framework_TestCase
     {
         return array(
             array(new CarBuilder()),
-            array(new BikeBuilder())
+            array(new BikeBuilder()),
         );
     }
 

Creational/FactoryMethod/Bicycle.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\FactoryMethod;
 
 /**
- * Bicycle is a bicycle
+ * Bicycle is a bicycle.
  */
 class Bicycle implements VehicleInterface
 {
@@ -13,7 +13,7 @@ class Bicycle implements VehicleInterface
     protected $color;
 
     /**
-     * sets the color of the bicycle
+     * sets the color of the bicycle.
      *
      * @param string $rgb
      */

Creational/FactoryMethod/FactoryMethod.php

@@ -3,16 +3,15 @@
 namespace DesignPatterns\Creational\FactoryMethod;
 
 /**
- * class FactoryMethod
+ * class FactoryMethod.
  */
 abstract class FactoryMethod
 {
-
     const CHEAP = 1;
     const FAST = 2;
 
     /**
-     * The children of the class must implement this method
+     * The children of the class must implement this method.
      *
      * Sometimes this method can be public to get "raw" object
      *
@@ -23,7 +22,7 @@ abstract class FactoryMethod
     abstract protected function createVehicle($type);
 
     /**
-     * Creates a new vehicle
+     * Creates a new vehicle.
      *
      * @param int $type
      *
@@ -32,7 +31,7 @@ abstract class FactoryMethod
     public function create($type)
     {
         $obj = $this->createVehicle($type);
-        $obj->setColor("#f00");
+        $obj->setColor('#f00');
 
         return $obj;
     }

Creational/FactoryMethod/Ferrari.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\FactoryMethod;
 
 /**
- * Ferrari is a italian car
+ * Ferrari is a italian car.
  */
 class Ferrari implements VehicleInterface
 {

Creational/FactoryMethod/GermanFactory.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\FactoryMethod;
 
 /**
- * GermanFactory is a vehicle factory in Germany
+ * GermanFactory is a vehicle factory in Germany.
  */
 class GermanFactory extends FactoryMethod
 {

Creational/FactoryMethod/ItalianFactory.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\FactoryMethod;
 
 /**
- * ItalianFactory is vehicle factory in Italy
+ * ItalianFactory is vehicle factory in Italy.
  */
 class ItalianFactory extends FactoryMethod
 {

Creational/FactoryMethod/Porsche.php

@@ -3,7 +3,7 @@
 namespace DesignPatterns\Creational\FactoryMethod;
 
 /**
- * Porsche is a german car
+ * Porsche is a german car.
  */
 class Porsche implements VehicleInterface
 {

Creational/FactoryMethod/Tests/FactoryMethodTest.php

@@ -7,21 +7,20 @@ use DesignPatterns\Creational\FactoryMethod\GermanFactory;
 use DesignPatterns\Creational\FactoryMethod\ItalianFactory;
 
 /**
- * FactoryMethodTest tests the factory method pattern
+ * FactoryMethodTest tests the factory method pattern.
  */
 class FactoryMethodTest extends \PHPUnit_Framework_TestCase
 {
-
     protected $type = array(
         FactoryMethod::CHEAP,
-        FactoryMethod::FAST
+        FactoryMethod::FAST,
     );
 
     public function getShop()
     {
         return array(
             array(new GermanFactory()),
-            array(new ItalianFactory())
+            array(new ItalianFactory()),
         );
     }
 

Creational/FactoryMethod/VehicleInterface.php

@@ -3,12 +3,12 @@
 namespace DesignPatterns\Creational\FactoryMethod;
 
 /**
- * VehicleInterface is a contract for a vehicle
+ * VehicleInterface is a contract for a vehicle.
  */
 interface VehicleInterface
 {
     /**
-     * sets the color of the vehicle
+     * sets the color of the vehicle.
      *
      * @param string $rgb
      */

Creational/Multiton/Multiton.php

@@ -3,24 +3,22 @@
 namespace DesignPatterns\Creational\Multiton;
 
 /**
- * class Multiton
+ * class Multiton.
  */
 class Multiton
 {
     /**
-     *
-     * the first instance
+     * the first instance.
      */
     const INSTANCE_1 = '1';
 
     /**
-     *
-     * the second instance
+     * the second instance.
      */
     const INSTANCE_2 = '2';
 
     /**
-     * holds the named instances
+     * holds the named instances.
      *
      * @var array
      */
@@ -28,7 +26,6 @@ class Multiton
 
     /**
      * should not be called from outside: private!
-     *
      */
     private function __construct()
     {
@@ -36,7 +33,7 @@ class Multiton
 
     /**
      * gets the instance with the given name, e.g. Multiton::INSTANCE_1
-     * uses lazy initialization
+     * uses lazy initialization.
      *
      * @param string $instanceName
      *
@@ -52,7 +49,7 @@ class Multiton
     }
 
     /**
-     * prevent instance from being cloned
+     * prevent instance from being cloned.
      *
      * @return void
      */
@@ -61,7 +58,7 @@ class Multiton
     }
 
     /**
-     * prevent instance from being unserialized
+     * prevent instance from being unserialized.
      *
      * @return void
      */

Creational/Pool/Pool.php

@@ -4,7 +4,6 @@ namespace DesignPatterns\Creational\Pool;
 
 class Pool
 {
-
     private $instances = array();
     private $class;
 

Creational/Pool/Processor.php

@@ -4,11 +4,10 @@ namespace DesignPatterns\Creational\Pool;
 
 class Processor
 {
-
     private $pool;
     private $processing = 0;
     private $maxProcesses = 3;
-    private $waitingQueue = [];
+    private $waitingQueue = array();
 
     public function __construct(Pool $pool)
     {