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Expression.php
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Expression.php
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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2016 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Db\Sql;
class Expression extends AbstractExpression
{
/**
* @const
*/
const PLACEHOLDER = '?';
/**
* @var string
*/
protected $expression = '';
/**
* @var array
*/
protected $parameters = [];
/**
* @var array
*/
protected $types = [];
/**
* @param string $expression
* @param string|array $parameters
* @param array $types @deprecated will be dropped in version 3.0.0
*/
public function __construct($expression = '', $parameters = null, array $types = [])
{
if ($expression !== '') {
$this->setExpression($expression);
}
if ($types) { // should be deprecated and removed version 3.0.0
if (is_array($parameters)) {
foreach ($parameters as $i => $parameter) {
$parameters[$i] = [
$parameter => isset($types[$i]) ? $types[$i] : self::TYPE_VALUE,
];
}
} elseif (is_scalar($parameters)) {
$parameters = [
$parameters => $types[0],
];
}
}
if ($parameters !== null) {
$this->setParameters($parameters);
}
}
/**
* @param $expression
* @return self Provides a fluent interface
* @throws Exception\InvalidArgumentException
*/
public function setExpression($expression)
{
if (! is_string($expression) || $expression == '') {
throw new Exception\InvalidArgumentException('Supplied expression must be a string.');
}
$this->expression = $expression;
return $this;
}
/**
* @return string
*/
public function getExpression()
{
return $this->expression;
}
/**
* @param $parameters
* @return self Provides a fluent interface
* @throws Exception\InvalidArgumentException
*/
public function setParameters($parameters)
{
if (! is_scalar($parameters) && ! is_array($parameters)) {
throw new Exception\InvalidArgumentException('Expression parameters must be a scalar or array.');
}
$this->parameters = $parameters;
return $this;
}
/**
* @return array
*/
public function getParameters()
{
return $this->parameters;
}
/**
* @deprecated
* @param array $types
* @return self Provides a fluent interface
*/
public function setTypes(array $types)
{
$this->types = $types;
return $this;
}
/**
* @deprecated
* @return array
*/
public function getTypes()
{
return $this->types;
}
/**
* @return array
* @throws Exception\RuntimeException
*/
public function getExpressionData()
{
$parameters = (is_scalar($this->parameters)) ? [$this->parameters] : $this->parameters;
$parametersCount = count($parameters);
$expression = str_replace('%', '%%', $this->expression);
if ($parametersCount === 0) {
return [
str_ireplace(self::PLACEHOLDER, '', $expression)
];
}
// assign locally, escaping % signs
$expression = str_replace(self::PLACEHOLDER, '%s', $expression, $count);
// test number of replacements without considering same variable begin used many times first, which is
// faster, if the test fails then resort to regex which are slow and used rarely
if ($count !== $parametersCount) {
preg_match_all('/\:\w*/', $expression, $matches);
if ($parametersCount !== count(array_unique($matches[0]))) {
throw new Exception\RuntimeException(
'The number of replacements in the expression does not match the number of parameters'
);
}
}
foreach ($parameters as $parameter) {
list($values[], $types[]) = $this->normalizeArgument($parameter, self::TYPE_VALUE);
}
return [[
$expression,
$values,
$types
]];
}
}