start a restructure

Creational/StaticFactory/FormatNumber.php

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+<?php
+
+namespace DesignPatterns\StaticFactory;
+
+/**
+ * Class FormatNumber
+ */
+class FormatNumber implements FormatterInterface
+{
+
+}

Creational/StaticFactory/FormatString.php

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+<?php
+
+namespace DesignPatterns\StaticFactory;
+
+/**
+ * Class FormatString
+ */
+class FormatString implements FormatterInterface
+{
+
+}

Creational/StaticFactory/FormatterInterface.php

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+<?php
+
+namespace DesignPatterns\StaticFactory;
+
+/**
+ * Class FormatterInterface
+ */
+interface FormatterInterface
+{
+
+}

Creational/StaticFactory/README.md

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+# Static Factory
+
+## Purpose
+
+Similar to the AbstractFactory, this pattern is used to create series of related or dependent objects.
+The difference between this and the abstract factory pattern is that the static factory pattern uses just one static
+method to create all types of objects it can create. It is usually named `factory` or `build`.
+
+## Examples
+
+* Zend Framework: `Zend_Cache_Backend` or `_Frontend` use a factory method create cache backends or frontends

Creational/StaticFactory/StaticFactory.php

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+<?php
+
+namespace DesignPatterns\StaticFactory;
+
+/**
+ * Note1: Remember, static => global => evil
+ * Note2: Cannot be subclassed or mock-upped or have multiple different instances
+ */
+class StaticFactory
+{
+    /**
+     * the parametrized function to get create an instance
+     *
+     * @param string $type
+     *
+     * @static
+     *
+     * @throws \InvalidArgumentException
+     * @return FormatterInterface
+     */
+    public static function factory($type)
+    {
+        $className = __NAMESPACE__ . '\Format' . ucfirst($type);
+
+        if (!class_exists($className)) {
+            throw new \InvalidArgumentException('Missing format class.');
+        }
+
+        return new $className();
+    }
+}

Creational/StaticFactory/Test/StaticFactoryTest.php

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+<?php
+
+namespace DesignPatterns\Tests\StaticFactory;
+
+use DesignPatterns\StaticFactory\StaticFactory;
+
+/**
+ * Tests for Static Factory pattern
+ *
+ */
+class StaticFactoryTest extends \PHPUnit_Framework_TestCase
+{
+
+    public function getTypeList()
+    {
+        return array(
+            array('string'),
+            array('number')
+        );
+    }
+
+    /**
+     * @dataProvider getTypeList
+     */
+    public function testCreation($type)
+    {
+        $obj = StaticFactory::factory($type);
+        $this->assertInstanceOf('DesignPatterns\StaticFactory\FormatterInterface', $obj);
+    }
+}