Download as ODP, PPTX
![$staffList = new StaffList();
$staffList->add("江口", 2);
$staffList->add("斎藤", 1);
foreach($staffList as $row){
var_dump($row->name, $row->sex);
}
string(6) "江口"
int(2)
string(6) "斎藤"
int(1)
class StaffList implements Iterator {
private $staffs = array();
private $index = 0;
//初期化
public function __construct () {
$this->index = 0;
}
//最初の要素に巻き戻す
function rewind () {
$this->index = 0;
}
//現在の要素を返す
function current() {
return $this->staffs[$this->index];
}
//現在の要素のキーを返す
function key () {
return $this->index;
}
//次の要素に進む
function next () {
$this->index++;
}
//現在位置が有効かどうかを調べる
function valid () {
return isset ( $this->staffs[$this->index] );
}
//追加
public function add ( $name, $sex ){
$staff = new Staff();
$staff->name = $name;
$staff->sex = $sex;
$this->staffs[$this->index] = $staff;
$this->index++;
}
}](https://image.slidesharecdn.com/random-140727210042-phpapp02/75/7-13-2048.jpg)
![<?xml version="1.0" encoding="utf-8"?>
<rss>
<channel>
<item>
<title>やったぜ！</title>
</item>
</channel>
</rss>
やったぜ！
$fileName = $argv[1];
try{
$factory = new ReaderFactory();
$obj = $factory->create($fileName);
$obj->read();
$obj->display();
}
catch(Exection $e){
echo $e;
}](https://image.slidesharecdn.com/random-140727210042-phpapp02/75/7-18-2048.jpg)
![Implementor
class FileDataSource implements DataSource {
private $source_name;
private $handler;
function __construct($source_name) {
$this->source_name = $source_name;
}
function open() {
if (!is_readable($this->source_name)) {
throw new Exception('データソースが見つかりません');
}
$this->handler = fopen($this->source_name, 'r');
if (!$this->handler) {
throw new Exception('データソースのオープンに失敗しました');
}
}
function read() {
$buffer = array();
while (!feof($this->handler)) {
$buffer[] = fgets($this->handler);
}
return join($buffer);
}
function close() {
if (!is_null($this->handler)) {
fclose($this->handler);
}
}
}
ConcreteImplementor
class Listing {
private $data_source;
function __construct($data_source) {
$this->data_source = $data_source;
}
function open() {
$this->data_source->open();
}
function read() {
return $this->data_source->read();
}
function close() {
$this->data_source->close();
}
}
Abstraction
interface DataSource {
public function open();
public function read();
public function close();
}
Implementor
Implementor
class ExtendedListing extends Listing {
function __construct($data_source) {
parent::__construct($data_source);
}
function readWithEncode() {
return htmlspecialchars($this->read(), ENT_QUOTES);
}
}
RefinedAbstraction
aggrigate](https://image.slidesharecdn.com/random-140727210042-phpapp02/75/7-35-2048.jpg)
デザインパターン（初歩的な7パターン）
- 1.
- 2.
- 3.
- 4.
- 5.
- 6.
- 7.
- 8.
- 9. class Singleton { //インスタンス保持用 private static$instance = null; /** * コンストラクタ */ private function __construct () { } /** * インスタンス取得 */ public static function get () { if ( is_null ( self::$instance ) ) { self::$instance = new self; } return self::$instance; } } $singleton = Singleton::get();
- 10.
- 11. 要素の集まりを保有するオブジェクトの各要素を順番に アクセスする方法を提供するためのパターン Aggregate ConcreteIterator() Iterator + next() + hasNext() ConcreteIterator +next() + hasNext() ConcreteAggregate ConcreteIterator() create create Iterator:要素に順次サクセスするインターフェース ConcreteIterator:順次アクセス方法・次要素の有無等の手順の詳細処理を定義 Aggregate:「Iterator」を作り出すインターフェースを定める ConcreteAggregate:「iterator」メソッドで、自身のオブジェクトをコンストラクタ引数に 「ConcreteAggregate」のオブジェクトを返します hasNext():次の要素が存在するかどうかを返す next():次の要素をとしだして、走査中の位置を進める
- 12.
- 13. $staffList = newStaffList(); $staffList->add("江口", 2); $staffList->add("斎藤", 1); foreach($staffList as $row){ var_dump($row->name, $row->sex); } string(6) "江口" int(2) string(6) "斎藤" int(1) class StaffList implements Iterator { private $staffs = array(); private $index = 0; //初期化 public function __construct () { $this->index = 0; } //最初の要素に巻き戻す function rewind () { $this->index = 0; } //現在の要素を返す function current() { return $this->staffs[$this->index]; } //現在の要素のキーを返す function key () { return $this->index; } //次の要素に進む function next () { $this->index++; } //現在位置が有効かどうかを調べる function valid () { return isset ( $this->staffs[$this->index] ); } //追加 public function add ( $name, $sex ){ $staff = new Staff(); $staff->name = $name; $staff->sex = $sex; $this->staffs[$this->index] = $staff; $this->index++; } }
- 14.
- 15.
- 16.
- 17. class ReaderFactory { /* Readerクラスのインスタンスを生成するAPI*/ public function create ( $fileName ) { $reader = $this->_createReader ( $fileName ); return $reader; } /** 生成するReaderサブクラスを選定する */ private function _createReader ( $fileName ) { if (false !== stripos($fileName, '.xml')) { return new XMLFileReader($fileName); } else { throw new Exception($fileName . ' is not supported.'); } } } interface Reader { /** 読み込み */ public function read (); /** 表示 */ public function display (); } class XMLFileReader implements Reader { /** コンストラクタ */ public function __construct($fileName) { if (!is_readable($fileName)) { throw new Exception($fileName . 'is not readable.'); } $this->_fileName = $fileName; } /** 読み込み */ public function read() { $this->_handler = simplexml_load_file($this->_fileName); } /** 表示 */ public function display() { foreach ( $this->_handler->channel->item as $item ) { echo $item->title; echo PHP_EOL; } } } Product ConcreteProduct Creator
- 18. <?xml version="1.0" encoding="utf-8"?> <rss> <channel> <item> <title>やったぜ！</title> </item> </channel> </rss> やったぜ！ $fileName= $argv[1]; try{ $factory = new ReaderFactory(); $obj = $factory->create($fileName); $obj->read(); $obj->display(); } catch(Exection $e){ echo $e; }
- 19.
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- 23. 継承の場合 interface Persion { public functiongetName(); } class Employee { private $_name; public function __construct( $name ) { $this->_name = $name; } public function printName() { print($this->_name.PHP_EOL); } } class EmployeePersion extends Employee implements Persion { public function __construct($name) { Employee::__construct($name); } public function getName (){ Employee::printName(); } }
- 24. 継承の場合 $employee = newEmployeePersion("さいとう"); $employee->getname(); $employee->printName(); さいとう さいとう
- 25.
- 26. 委譲の場合 interface Persion { public functiongetName(); } class Employee { private $_name; public function __construct( $name ) { $this->_name = $name; } public function printName() { print($this->_name.PHP_EOL); } } class EmployeePersion implements Persion { private $_person; public function __construct ( $name ) { $this->_person = new Employee( $name ); } public function getName (){ $this->_person->printName(); } }
- 27. 委譲の場合 $employee = newEmployeePersion("さいとう"); $employee->getname(); さいとう
- 28.
- 29.
- 30.
- 31. abstract class AbstractDisplay{ /** サブクラスに実装を任せる抽象メソッド **/ protected abstract function output (); /** 抽象クラスで実装しているメソッド **/ final function display (){ $this->output(); } } /** サブクラスを実装 **/ class StringDisplay extends AbstractDisplay{ private $string; function __construct($string){ $this->string = $string; } function output (){ echo $this->string."！".PHP_EOL; } } $d = new StringDisplay("やったぜ"); $d->display(); やったぜ
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- 35. Implementor class FileDataSource implementsDataSource { private $source_name; private $handler; function __construct($source_name) { $this->source_name = $source_name; } function open() { if (!is_readable($this->source_name)) { throw new Exception('データソースが見つかりません'); } $this->handler = fopen($this->source_name, 'r'); if (!$this->handler) { throw new Exception('データソースのオープンに失敗しました'); } } function read() { $buffer = array(); while (!feof($this->handler)) { $buffer[] = fgets($this->handler); } return join($buffer); } function close() { if (!is_null($this->handler)) { fclose($this->handler); } } } ConcreteImplementor class Listing { private $data_source; function __construct($data_source) { $this->data_source = $data_source; } function open() { $this->data_source->open(); } function read() { return $this->data_source->read(); } function close() { $this->data_source->close(); } } Abstraction interface DataSource { public function open(); public function read(); public function close(); } Implementor Implementor class ExtendedListing extends Listing { function __construct($data_source) { parent::__construct($data_source); } function readWithEncode() { return htmlspecialchars($this->read(), ENT_QUOTES); } } RefinedAbstraction aggrigate
- 36. apacheのアクセスログ apacheのアクセスログ $list1 = newListing(new FileDataSource('access.log')); $list2 = new ExtendedListing(new FileDataSource('access.log')); try { $list1->open(); $list2->open(); } catch (Exception $e) { die($e->getMessage()); } $data = $list1->read(); echo $data.PHP_EOL; $data = $list2->readWithEncode(); echo $data.PHP_EOL; $list1->close(); $list2->close();
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- 39.
- 40. //Strategy interface interface Strategy{ public function test(); } // Strategyインスタンスを実行するContext class Context { private function __construct(){} public static function test( Strategy $strategy) { return $strategy->test(); } } //Strategy interfaceの実装 class Test2 implements Strategy { public function test() { return 2; } } //Strategy interfaceの実装 class Test1 implements Strategy { public function test() { return 1; } }
- 41. 1 2 $val = Context::test(new Test1()); echo "$val n"; $val = Context::test( new Test2()); echo "$val n";
- 42.