/**
* Specifies the expressions to select.
*
* @param string|string[] $expressions
* @return self
* @throws InvalidArgumentException
*/
public function select($expressions)
{
$expressions = is_array($expressions) ? $expressions : func_get_args();
foreach ($expressions as $expression) {
$this->expressionValidator->validate($expression, ExpressionValidator::VALIDATE_VARIABLE | ExpressionValidator::VALIDATE_FUNCTION_AS);
// @todo temp hack to add AS definitions to defined variables
$regexHelper = new RegexHelper();
$matches = $regexHelper->getMatches('AS \\{variable}', $expression);
$this->usageValidator->trackDefinedVariables($matches);
// @todo detect functions and wrap with brackets automatically
$this->usageValidator->trackUsedVariables($expression);
$this->selects[] = $expression;
}
return $this;
}
/**
* Adds the given subquery.
*
* @param QueryBuilder $queryBuilder
* @return self
* @throws InvalidArgumentException
*/
public function subquery(QueryBuilder $queryBuilder)
{
$this->subqueries[] = $queryBuilder->getSPARQL(false);
$this->usageValidator->trackDefinedVariables(implode(' ', $queryBuilder->getSelects()));
// @todo temp hack to add AS definitions to defined variables
$regexHelper = new RegexHelper();
$matches = $regexHelper->getMatches('AS \\{variable}', implode(' ', $queryBuilder->getSelects()));
$this->usageValidator->trackDefinedVariables($matches);
return $this;
}
private function matchPrefixes($expression)
{
return $this->regexHelper->getMatches('(^|\\W)(\\{prefix}):\\{name}', $expression, 2);
}
/**
* @dataProvider provideGetMatches
*/
public function testGetMatches($regex, $expression, $matches)
{
$regexHelper = new RegexHelper();
$this->assertEquals($matches, $regexHelper->getMatches($regex, $expression));
}
private function addExpressions(array $expressions, $options = null)
{
foreach ($expressions as $expression) {
$this->expressionValidator->validate($expression, $options ?: ExpressionValidator::VALIDATE_VARIABLE | ExpressionValidator::VALIDATE_FUNCTION_AS);
// @todo temp hack to add AS definitions to defined variables
$regexHelper = new RegexHelper();
$matches = $regexHelper->getMatches('AS \\{variable}', $expression);
$this->usageValidator->trackDefinedVariables($matches);
// @todo detect functions and wrap with brackets automatically
$this->usageValidator->trackUsedVariables($expression);
$this->usageValidator->trackUsedPrefixes($expression);
$this->selects[] = $expression;
}
}