public string Evaluate(WalkedPath walkedPath)
{
switch (_arrayPathType)
{
case ArrayPathType.AUTO_EXPAND:
return(_canonicalForm);
case ArrayPathType.EXPLICIT_INDEX:
return(_arrayIndex);
case ArrayPathType.HASH:
MatchedElement element = walkedPath.ElementFromEnd(_ref.GetPathIndex()).MatchedElement;
return(element.GetHashCount().ToString());
case ArrayPathType.TRANSPOSE:
string key = _transposePathElement.Evaluate(walkedPath);
return(VerifyStringIsNonNegativeInteger(key));
case ArrayPathType.REFERENCE:
{
MatchedElement lpe = walkedPath.ElementFromEnd(_ref.GetPathIndex()).MatchedElement;
string keyPart;
if (_ref is IPathAndGroupReference pagr)
{
keyPart = lpe.GetSubKeyRef(pagr.GetKeyGroup());
}
else
{
keyPart = lpe.GetSubKeyRef(0);
}
return(VerifyStringIsNonNegativeInteger(keyPart));
}
default:
throw new InvalidOperationException("ArrayPathType enum added two without updating this switch statement.");
}
}
/**
* This method is used when the TransposePathElement is used on the LFH as data.
*
* Aka, normal "evaluate" returns either a Number or a string.
*
* @param walkedPath WalkedPath to evaluate against
* @return The data specified by this TransposePathElement.
*/
public JToken ObjectEvaluate(WalkedPath walkedPath)
{
// Grap the data we need from however far up the tree we are supposed to go
PathStep pathStep = walkedPath.ElementFromEnd(_upLevel);
if (pathStep == null)
{
return(null);
}
var treeRef = pathStep.TreeRef;
// Now walk down from that level using the subPathReader
if (_subPathReader == null)
{
return(treeRef);
}
else
{
return(_subPathReader.Read(treeRef, walkedPath));
}
}
public string Evaluate(WalkedPath walkedPath)
{
// Walk thru our tokens and build up a string
// Use the supplied Path to fill in our token References
StringBuilder output = new StringBuilder();
foreach (object token in _tokens)
{
if (token is string stoken)
{
output.Append(stoken);
}
else
{
AmpReference ref_ = (AmpReference)token;
MatchedElement matchedElement = walkedPath.ElementFromEnd(ref_.GetPathIndex()).MatchedElement;
string value = matchedElement.GetSubKeyRef(ref_.GetKeyGroup());
output.Append(value);
}
}
return(output.ToString());
}