← All changes | includes/Traits/Singleton.php +36 -39 2.0.0 → 2.3.0 View file →

		@@ -1,39 +1,36 @@
1		-<?php
2		-
3		-namespace TableBuilder\Traits;
4		-
5		-/**
6		- * Trait for making singleton instance
7		- * This is a factory singleton
8		- *
9		- * @package Gutenkit\Traits
10		- */
11		-trait Singleton {
12		- /**
13		- * The Singleton's instance is stored in a static field. This field is an
14		- * array, because we'll allow our Singleton to have subclasses. Each item in
15		- * this array will be an instance of a specific Singleton's subclass. You'll
16		- * see how this works in a moment.
17		- */
18		- private static $instances = array();
19		-
20		- /**
21		- * This is the static method that controls the access to the singleton
22		- * instance. On the first run, it creates a singleton object and places it
23		- * into the static field. On subsequent runs, it returns the client existing
24		- * object stored in the static field.
25		- *
26		- * This implementation lets you subclass the Singleton class while keeping
27		- * just one instance of each subclass around.
28		- *
29		- * @return object
30		- * @since 1.0.0
31		- */
32		- public static function instance() {
33		- $class = get_called_class();
34		- if ( ! isset( self::$instances[$class] ) ) {
35		- self::$instances[$class] = new $class();
36		- }
37		- return self::$instances[$class];
38		- }
39		-}
	1	+<?php
	2	+/**
	3	+ * Generic singleton trait for per-class shared instances
	4	+ *
	5	+ * @package TableKit
	6	+ */
	7	+
	8	+namespace TableBuilder\Traits;
	9	+
	10	+/**
	11	+ * Generic singleton trait: gives any class a shared instance() accessor
	12	+ * keyed by class name, so subclasses don't each need to reimplement it.
	13	+ *
	14	+ * @package TableBuilder\Traits
	15	+ */
	16	+trait Singleton {
	17	+ /**
	18	+ * Shared instances, keyed by class name.
	19	+ *
	20	+ * @var array
	21	+ */
	22	+ private static $instances = array();
	23	+
	24	+ /**
	25	+ * Gets (and lazily creates) the shared instance of the using class.
	26	+ *
	27	+ * @return static The shared instance.
	28	+ */
	29	+ public static function instance() {
	30	+ $class = get_called_class();
	31	+ if ( ! isset( self::$instances[ $class ] ) ) {
	32	+ self::$instances[ $class ] = new $class();
	33	+ }
	34	+ return self::$instances[ $class ];
	35	+ }
	36	+}