/**
* Get all elements occureing in a regular expression
*
* @param slRegularExpression $regExp
* @return array
*/
protected function getChildElements(slRegularExpression $regExp)
{
if ($regExp instanceof slRegularExpressionElement) {
return array($regExp->getContent());
}
if (!$regExp instanceof slRegularExpressionContainer) {
return array();
}
$children = array();
foreach ($regExp->getChildren() as $child) {
$children = array_merge($children, $this->getChildElements($child));
}
return $children;
}
/**
* Extracts all types mentioned in a regular exression
*
* Returns an unique array with all types mentioned in the regular
* expression, to create proper mixed types in the DTD schema output.
*
* @param slRegularExpression $regularExpression
* @return array
*/
protected function extractTypes(slRegularExpression $regularExpression)
{
if ($regularExpression instanceof slRegularExpressionElement) {
return array($regularExpression->getContent());
}
if (!$regularExpression instanceof slRegularExpressionContainer) {
return array();
}
$types = array();
foreach ($regularExpression->getChildren() as $child) {
$types = array_merge($types, $this->extractTypes($child));
}
return array_unique($types);
}
