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Constarray.php
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Constarray.php
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<?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\Realdom;
use Hoa\Math;
/**
* Class \Hoa\Realdom\Constarray.
*
* Realistic domain: constarray.
*
* @copyright Copyright © 2007-2017 Hoa community
* @license New BSD License
*/
class Constarray extends RealdomArray implements IRealdom\Constant
{
/**
* Realistic domain name.
*
* @const string
*/
const NAME = 'constarray';
/**
* Realistic domain defined arguments.
*
* @var array
*/
protected $_arguments = [
'pairs'
];
/**
* Construct a realistic domain.
*
* @return void
*/
protected function construct()
{
$this['length'] = new Constinteger(count($this['pairs']));
return;
}
/**
* Reset realistic domain.
*
* @return void
*/
public function reset()
{
foreach ($this['pairs'] as $pair) {
$pair[0]->reset();
if (isset($pair[1])) {
$pair[1]->reset();
}
}
return;
}
/**
* Predicate whether the sampled value belongs to the realistic domains.
*
* @param mixed $q Sampled value.
* @return boolean
*/
protected function _predicate($q)
{
if (!is_array($q)) {
return false;
}
$count = count($q);
if (false === $this['length']->predicate($count)) {
return false;
}
$pairs = $this['pairs'];
foreach ($q as $_key => $_value) {
$out = false;
foreach ($pairs as $pair) {
$key = $pair[0];
$value = $pair[1];
if (false === $key->predicate($_key)) {
continue;
}
if (false === $value->predicate($_value)) {
continue;
}
$out = true;
break;
}
if (false === $out) {
return false;
}
}
return $out;
}
/**
* Sample one new value.
*
* @param \Hoa\Math\Sampler $sampler Sampler.
* @return mixed
*/
protected function _sample(Math\Sampler $sampler)
{
$out = [];
foreach ($this['pairs'] as $pair) {
if (!isset($pair[1])) {
$out[] = $pair[0]->sample($sampler);
continue;
}
$key = $pair[0]->sample($sampler);
$value = $pair[1]->sample($sampler);
$out[$key] = $value;
}
return $out;
}
/**
* Get constant value.
*
* @return float
*/
public function getConstantValue()
{
return $this['pairs'];
}
/**
* Get representation of the realistic domain.
*
* @return string
*/
public function getConstantRepresentation()
{
$handle = [];
foreach ($this['pairs'] as $pair) {
$_handle = null;
foreach ($pair as $_pair) {
if (null === $_handle) {
$_handle = isset($pair[1]) ? 'from ' : 'to ';
} else {
$_handle .= ' to ';
}
if (null !== $holder = $_pair->getHolder()) {
$_handle .= $holder->getName();
} else {
$_handle .= $this->getPraspelVisitor()->visit($_pair);
}
}
$handle[] = $_handle;
}
return '[' . implode(', ', $handle) . ']';
}
}