AppendIterator Class Reference

Inheritance diagram for AppendIterator:

Collaboration diagram for AppendIterator:

Public Member Functions
	__call ($func, $params)
	__construct ()
	append (Iterator $it)
	current ()
	getInnerIterator ()
	key ()
	next ()
	rewind ()
	valid ()

Private Attributes
	$iterators

Detailed Description

Iterator that iterates over several iterators one after the other.

Author

Marcus Boerger

Version

1.0

Since

PHP 5.1

Definition at line 18 of file appenditerator.inc.

Constructor & Destructor Documentation

AppendIterator::__construct

(

)

Construct an empty AppendIterator.

Definition at line 25 of file appenditerator.inc.

    {
        $this->iterators = new ArrayIterator();
    }

Member Function Documentation

AppendIterator::__call	(		$func,
			$params
	)

Aggregates the inner iterator.

Definition at line 116 of file appenditerator.inc.

References getInnerIterator().

    {
        return call_user_func_array(array($this->getInnerIterator(), $func), $params);
    }

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AppendIterator::append

(

Iterator

$it

)

Append an Iterator.

Parameters

$it	Iterator to append

If the current state is invalid but the appended iterator is valid the AppendIterator itself becomes valid. However there will be no call to $it->rewind(). Also if the current state is invalid the inner ArrayIterator will be rewound und forwarded to the appended element.

Definition at line 38 of file appenditerator.inc.

    {
        $this->iterators->append($it);
    }

AppendIterator::current

(

)

Returns

the current value if it is valid or NULL

Implements Iterator.

Definition at line 71 of file appenditerator.inc.

References getInnerIterator().

    {
        /* Using $this->valid() would be exactly the same; it would omit
         * the access to a non valid element in the inner iterator. Since
         * the user didn't respect the valid() return value false this
         * must be intended hence we go on. */
        return $this->iterators->valid() ? $this->getInnerIterator()->current() : NULL;
    }

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AppendIterator::getInnerIterator

(

)

Returns

the current inner Iterator

Implements OuterIterator.

Definition at line 45 of file appenditerator.inc.

Referenced by __call(), current(), key(), next(), rewind(), and valid().

    {
        return $this->iterators->current();
    }

AppendIterator::key

(

)

Returns

the current key if it is valid or NULL

Implements Iterator.

Definition at line 82 of file appenditerator.inc.

References getInnerIterator().

    {
        return $this->iterators->valid() ? $this->getInnerIterator()->key() : NULL;
    }

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AppendIterator::next

(

)

Move to the next element.

If this means to another Iterator that rewind that Iterator.

Returns

void

Implements Iterator.

Definition at line 91 of file appenditerator.inc.

References getInnerIterator(), and valid().

    {
        if (!$this->iterators->valid())
        {
            return; /* done all */
        }
        $this->getInnerIterator()->next();
        if ($this->getInnerIterator()->valid())
        {
            return; /* found valid element in current inner iterator */
        }
        $this->iterators->next();
        while ($this->iterators->valid())
        {
            $this->getInnerIterator()->rewind();
            if ($this->getInnerIterator()->valid())
            {
                return; /* found element as first elemet in another iterator */
            }
            $this->iterators->next();
        }
    }

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AppendIterator::rewind

(

)

Rewind to the first element of the first inner Iterator.

Returns

void

Implements Iterator.

Definition at line 53 of file appenditerator.inc.

References getInnerIterator().

    {
        $this->iterators->rewind();
        if ($this->iterators->valid())
        {
            $this->getInnerIterator()->rewind();
        }
    }

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AppendIterator::valid

(

)

Returns

whether the current element is valid

Implements Iterator.

Definition at line 64 of file appenditerator.inc.

References getInnerIterator().

Referenced by next().

    {
        return $this->iterators->valid() && $this->getInnerIterator()->valid();
    }

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Member Data Documentation

AppendIterator::$iterators

private

array of inner iterators

Definition at line 21 of file appenditerator.inc.

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The documentation for this class was generated from the following file:

• appenditerator.inc