private XPathExpression GetCompiledExpression(SifXPathExpression expression)
{
XPathExpression returnValue = expression.CompiledExpression;
if (returnValue == null)
{
returnValue = fDefaultNavigator.Compile(expression.Expression);
expression.CompiledExpression = returnValue;
}
return(returnValue);
}
/// <summary>
/// Evaluates the xpath and returns the resulting object. Primitive types are wrapped into objects.
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public object GetValue(SifXPathExpression expression)
{
return(GetValue(GetCompiledExpression(expression)));
}
internal INodePointer CreatePath(SifXPathExpression sifXPathExpression)
{
return(CreatePath(sifXPathExpression.Expression));
}
private void Compile()
{
// If there is a value assignment in the rule, chop it off
String sqp = fDef;
int lastEqualsSign = fDef.LastIndexOf("=");
if (lastEqualsSign > -1)
{
int lastBracket = fDef.LastIndexOf("]");
if (lastBracket < lastEqualsSign)
{
sqp = fDef.Substring(0, lastEqualsSign);
fValueIndex = lastEqualsSign + 1;
}
}
fExpression = SifXPathContext.Compile(sqp);
}
private XPathExpression GetCompiledExpression( SifXPathExpression expression )
{
XPathExpression returnValue = expression.CompiledExpression;
if ( returnValue == null )
{
returnValue = fDefaultNavigator.Compile( expression.Expression );
expression.CompiledExpression = returnValue;
}
return returnValue;
}
internal INodePointer CreatePath( SifXPathExpression sifXPathExpression )
{
return CreatePath( sifXPathExpression.Expression );
}
/// <summary>
/// Evaluates the xpath and returns the resulting object. Primitive types are wrapped into objects.
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public object GetValue( SifXPathExpression expression )
{
return GetValue( GetCompiledExpression( expression ) );
}