private static Hashtable metaModelXPathExpressions = new Hashtable(); //manter guardado o comando sql de forma a ser gerado e compilado 1 única vez
private static XPathExpression getMetaModelXPathExpression(string xpath)
{
XPathExpression metaModelXPathExpression = (XPathExpression)(metaModelXPathExpressions[xpath]);
if (metaModelXPathExpression == null)
{
if (metaModelXPathNavigator == null)
{
metaModelXPathNavigator = MetaModel.CreateNavigator();
}
metaModelXPathExpression = metaModelXPathNavigator.Compile(xpath);
metaModelXPathExpressions.Add(xpath, metaModelXPathExpression);
}
return metaModelXPathExpression;
}