/**
* Parses an expression.
*
* @param Expression|string $expression The expression to parse
* @param array $names An array of valid names
*
* @return ParsedExpression A ParsedExpression instance
*/
public function parse($expression, $names)
{
if ($expression instanceof ParsedExpression) {
return $expression;
}
$key = $expression . '//' . implode('-', $names);
if (null === ($parsedExpression = $this->cache->fetch($key))) {
$nodes = $this->getParser()->parse($this->getLexer()->tokenize((string) $expression), $names);
$parsedExpression = new ParsedExpression((string) $expression, $nodes);
$this->cache->save($key, $parsedExpression);
}
return $parsedExpression;
}
/**
* Parses an expression.
*
* @param Expression|string $expression The expression to parse
* @param array $names An array of valid names
*
* @return ParsedExpression A ParsedExpression instance
*/
public function parse($expression, $names)
{
if ($expression instanceof ParsedExpression) {
return $expression;
}
asort($names);
$cacheKeyItems = array();
foreach ($names as $nameKey => $name) {
$cacheKeyItems[] = is_int($nameKey) ? $name : $nameKey . ':' . $name;
}
$key = $expression . '//' . implode('|', $cacheKeyItems);
if (null === ($parsedExpression = $this->cache->fetch($key))) {
$nodes = $this->getParser()->parse($this->getLexer()->tokenize((string) $expression), $names);
$parsedExpression = new ParsedExpression((string) $expression, $nodes);
$this->cache->save($key, $parsedExpression);
}
return $parsedExpression;
}
