iterator_003.phpt

PHP v6.0 For Linux 运行环境：Win9X/ WinME/ WinNT/ Win2K/ WinXP

--TEST--
SPL: CachingIterator and __toString()
--SKIPIF--
<?php if (!extension_loaded("spl")) print "skip"; ?>
--FILE--
<?php

class Student
{
	private $id;
	private $name;

    public function __construct($id, $name)
    {
    	$this->id = $id;
    	$this->name = $name;
    }

	public function __toString()
	{
		return $this->id . ', ' . $this->name;
	}
	
	public function getId()
	{
		return $this->id;
	}
}

class StudentIdFilter extends FilterIterator
{
	private $id;

	public function __construct(ArrayObject $students, Student $other)
	{
		FilterIterator::__construct($students->getIterator());
		$this->id = $other->getId();
	}
	
	public function accept()
	{
		echo "ACCEPT ".$this->current()->getId()." == ".$this->id."\n";
		return $this->current()->getId() == $this->id;
	}
}

class StudentList implements IteratorAggregate
{
	private $students;
	
	public function __construct()
	{
		$this->students = new ArrayObject(array());
	}
	
	public function add(Student $student)
	{
		if (!$this->contains($student)) {
			$this->students[] = $student;
		}
	}
	
	public function contains(Student $student)
	{
		foreach ($this->students as $s)
		{
			if ($s->getId() == $student->getId()) {
				return true;
			}
		}
		return false;
	}
	
	public function getIterator() {
		return new CachingIterator($this->students->getIterator(), true);
	}
}

$students = new StudentList();
$students->add(new Student('01234123', 'Joe'));
$students->add(new Student('00000014', 'Bob'));
$students->add(new Student('00000014', 'Foo'));

// The goal is to verify we can access the cached string value even if it was
// generated by a call to __toString(). To check this we need to access the
// iterator's __toString() method.
$it = $students->getIterator();
foreach ($it as $student) {
	echo $it->__toString(), "\n";
}
?>
===DONE===
<?php exit(0); ?>
--EXPECT--
01234123, Joe
00000014, Bob
===DONE===