| public abstract ResolveVariable ( string prefix, string name ) : IXsltContextVariable | ||
| prefix | string | |
| name | string | |
| return | IXsltContextVariable | |
internal override void SetXsltContext(XsltContext context) {
if (context == null) {
throw new XPathException(Res.Xp_UndefinedXsltContext, Prefix, Name); }
if(xsltContextVariable == null) {
xsltContextVariable = context.ResolveVariable(Prefix, Name);
Debug.Assert(xsltContextVariable != null, "XSLT has to resolve it or throw exception");
}
else {
Debug.Assert(xsltContextVariable == context.ResolveVariable(Prefix, Name), "ResolveVariable supposed to return the same VariableAction each time");
}
Object result = xsltContextVariable.Evaluate(context);
if (result is double) {
_VarQuery = new OperandQuery(result, XPathResultType.Number);
}
else if (result is String) {
_VarQuery = new OperandQuery(result, XPathResultType.String);
}
else if (result is Boolean) {
_VarQuery = new OperandQuery(result, XPathResultType.Boolean);
}
else if (result is XPathNavigator) {
_VarQuery = new NavigatorQuery((XPathNavigator)result);
}
else if (result is ResetableIterator) {
ResetableIterator it = result as ResetableIterator;
_VarQuery = new XmlIteratorQuery( (ResetableIterator) it.Clone() );
}
else if (result is XPathNodeIterator) {
Debug.Assert(false, "Unexpected type of XPathNodeIterator");
throw new NotSupportedException(Res.GetString(Res.XmlUnsupportedType, result.GetType().FullName));
}
else if (result is int) {
_VarQuery = new OperandQuery(XmlConvert.ToXPathDouble(result), XPathResultType.Number);
}
else {
if (result == null) {
throw new XPathException(Res.Xslt_InvalidVariable, Name);
}
Debug.Assert(false, "Unexpected variable type");
throw new NotSupportedException(Res.GetString(Res.XmlUnsupportedType, result.GetType().FullName));
}
Debug.Assert(_VarQuery != null);
}
public override void SetXsltContext(XsltContext context) {
if (context == null) {
throw XPathException.Create(Res.Xp_NoContext);
}
if (this.xsltContext != context) {
xsltContext = context;
variable = xsltContext.ResolveVariable(prefix, name);
// Since null is allowed for ResolveFunction, allow it for ResolveVariable as well
if (variable == null) {
throw XPathException.Create(Res.Xp_UndefVar, QName);
}
}
}
