- 追加された行はこの色です。
- 削除された行はこの色です。
* Flyweightパターン [#nbf11d15]
<?php
class Foo {
private $val = 0;
private $pool = array();
public function getVal($key) {
public function getValue($key) {
if (!isset($this->pool[$key])) {
$this->pool[$key] = $this->create();
}
return $this->pool[$key];
}
private function create() {
return ++$this->val;
return rand(0,1000);
}
public function clear($key) {
unset($this->pool[$key]);
}
}
$f = new Foo;
print $f->getVal(1) . "\n"; # 1
print $f->getVal(1) . "\n"; # 1
print $f->getVal(2) . "\n"; # 2
print $f->getVal(1) . "\n"; # 1
print $f->getValue(1) . "\n"; # 328
print $f->getValue(1) . "\n"; # 328
print $f->getValue(2) . "\n"; # 912
print $f->getValue(1) . "\n"; # 328
$f->clear(1);
print $f->getVal(1) . "\n"; # 3
print $f->getValue(1) . "\n"; # 381
** キャッシュ処理の実装を独立させて [#s6006c20]
<?php
class FlyweightImplement {
public function create() {
return rand(0,1000);
}
public function clear($key) {
unset($this->pool[$key]);
}
}
interface FlyweightInterface {
public function create();
public function clear($key);
}
class Foo implements FlyweightInterface {
private $flyweightImplement = null;
private $pool = array();
public function __construct() {
$this->flyweightImplement = new FlyweightImplement;
}
public function getValue($key) {
if (!isset($this->pool[$key])) {
$this->pool[$key] = $this->create();
}
return $this->pool[$key];
}
public function create() {
return $this->flyweightImplement->create();
}
public function clear($key) {
return $this->flyweightImplement->clear($key);
}
}
