https://github.com/hoaproject/Praspel
Tip revision: b4e3e894bc9043d0e2bd43cdf1482c9d7bd0cace authored by Ivan Enderlin on 10 January 2017, 13:08:06 UTC
Prepare 1.17.01.10.
Prepare 1.17.01.10.
Tip revision: b4e3e89
Collection.php
<?php
/**
* Hoa
*
*
* @license
*
* New BSD License
*
* Copyright © 2007-2017, Hoa community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Hoa nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
namespace Hoa\Praspel\Model;
use Hoa\Iterator;
use Hoa\Praspel;
use Hoa\Visitor;
/**
* Class \Hoa\Praspel\Model\Collection.
*
* Represent a collection of clauses.
*
* @copyright Copyright © 2007-2017 Hoa community
* @license New BSD License
*/
class Collection
implements Visitor\Element,
Iterator\Aggregate,
\ArrayAccess,
\Countable
{
/**
* Clauses.
*
* @var array
*/
protected $_clauses = [];
/**
* Mapping from position to clauses (instead of identifier).
*
* @var array
*/
protected $_mapping = [];
/**
* Reference clause.
*
* @var \Hoa\Praspel\Model\Clause
*/
protected $_clause = null;
/**
* Post-clone function.
*
* @var closure
*/
protected $_postClone = null;
/**
* Build a collection of clauses.
*
* @param \Hoa\Praspel\Model\Clause $clause Clause.
* @param \Closure $postClone Post-clone function.
*/
public function __construct(Clause $clause, \Closure $postClone = null)
{
$this->_clause = $clause;
$this->_postClone = $postClone;
return;
}
/**
* Check whether an offset exists.
*
* @param string $offset Offset.
* @return bool
*/
public function offsetExists($offset)
{
return false !== array_key_exists($offset, $this->_clauses);
}
/**
* Get a clause.
*
* @param string $offset Offset.
* @return \Hoa\Praspel\Model\Clause
*/
public function offsetGet($offset)
{
if (false === $this->offsetExists($offset)) {
$clause = $this->getClause();
$this->_clauses[$offset] = clone $clause;
$this->_mapping[] = &$this->_clauses[$offset];
$postClone = $this->getPostClone();
if (null !== $postClone) {
$postClone($this->_clauses[$offset], $offset);
}
}
return $this->_clauses[$offset];
}
/**
* Alias of $this->offsetGet($offset).
*
* @param string $identifier Identifier.
* @return \Hoa\Praspel\Model\Clause
*/
public function get($offset)
{
return $this->offsetGet($offset);
}
/**
* Get a clause from its position.
*
* @param string $position Position.
* @return \Hoa\Praspel\Model\Clause
*/
public function getNth($position)
{
if (!isset($this->_mapping[$position])) {
return null;
}
return $this->_mapping[$position];
}
/**
* Disabled.
*
* @return void
* @throws \Hoa\Praspel\Exception\Model
*/
public function offsetSet($offset, $value)
{
throw new Praspel\Exception\Model('Operation denied.', 0);
}
/**
* Disabled.
*
* @return void
* @throws \Hoa\Praspel\Exception\Model
*/
public function offsetUnset($offset)
{
throw new Praspel\Exception\Model('Operation denied.', 1);
}
/**
* Get reference clause.
*
* @return \Hoa\Praspel\Model\Clause
*/
protected function getClause()
{
return $this->_clause;
}
/**
* Get post-clone function.
*
* @return \Closure
*/
protected function getPostClone()
{
return $this->_postClone;
}
/**
* Iterate over all clauses.
*
* @return \Hoa\Iterator\Map
*/
public function getIterator()
{
return new Iterator\Map($this->_clauses);
}
/**
* Count number of clauses.
*
* @return int
*/
public function count()
{
return count($this->_clauses);
}
/**
* Accept a visitor.
*
* @param \Hoa\Visitor\Visit $visitor Visitor.
* @param mixed &$handle Handle (reference).
* @param mixed $eldnah Handle (no reference).
* @return mixed
*/
public function accept(
Visitor\Visit $visitor,
&$handle = null,
$eldnah = null
) {
return $visitor->visit($this, $handle, $eldnah);
}
}