private Csw.V202.XPathQueryableNavigator GetNavigator(ExpressionBuilderParameters parameters)
{
if (_Navigator == null)
{
Csw.V202.XPathQueryableNavigator xptn = new Csw.V202.XPathQueryableNavigator(parameters.ElementType);
XPathNodeIterator xpni = xptn.Select(_Identifier.Symbol, parameters.NamespaceResolver, true);
while (xpni.MoveNext())
{
_Navigator = xpni.Current as Csw.V202.XPathQueryableNavigator;
}
Debug.Assert(_Navigator != null);
if (_Navigator == null)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
SR.InvalidPropertyNameExpressionException,
_Identifier.Symbol
)
);
}
}
return(_Navigator);
}
public Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func<Expression, ParameterExpression, Expression> operatorCreator)
{
if (!_Result.HasValue)
{
Csw.V202.XPathQueryableNavigator xptn=new Csw.V202.XPathQueryableNavigator(parameters.ElementType);
XPathNodeIterator xpni=xptn.Select(_AttributeName.Identifier.Symbol, parameters.NamespaceResolver, true);
_Result=xpni.MoveNext();
if (_Negated)
_Result=!_Result;
}
return Expression.Constant(_Result.Value, typeof(bool));
}
public Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func <Expression, ParameterExpression, Expression> operatorCreator)
{
if (!_Result.HasValue)
{
Csw.V202.XPathQueryableNavigator xptn = new Csw.V202.XPathQueryableNavigator(parameters.ElementType);
XPathNodeIterator xpni = xptn.Select(_AttributeName.Identifier.Symbol, parameters.NamespaceResolver, true);
_Result = xpni.MoveNext();
if (_Negated)
{
_Result = !_Result;
}
}
return(Expression.Constant(_Result.Value, typeof(bool)));
}
private Csw.V202.XPathQueryableNavigator GetNavigator(ExpressionBuilderParameters parameters)
{
if (_Navigator==null)
{
Csw.V202.XPathQueryableNavigator xptn=new Csw.V202.XPathQueryableNavigator(parameters.ElementType);
XPathNodeIterator xpni=xptn.Select(_Identifier.Symbol, parameters.NamespaceResolver, true);
while (xpni.MoveNext())
_Navigator=xpni.Current as Csw.V202.XPathQueryableNavigator;
Debug.Assert(_Navigator!=null);
if (_Navigator==null)
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
SR.InvalidPropertyNameExpressionException,
_Identifier.Symbol
)
);
}
return _Navigator;
}
