public AmpPathElement(string key) :
base(key)
{
var literal = new StringBuilder();
var canonicalBuilder = new StringBuilder();
var tok = new List <object>();
int index = 0;
while (index < key.Length)
{
char c = key[index];
// beginning of reference
if (c == '&')
{
// store off any literal text captured thus far
if (literal.Length > 0)
{
tok.Add(literal.ToString());
canonicalBuilder.Append(literal);
literal.Clear();
}
int refEnd = FindEndOfReference(key.Substring(index + 1));
AmpReference ref_ = new AmpReference(key.Substring(index, refEnd + 1));
canonicalBuilder.Append(ref_.GetCanonicalForm());
tok.Add(ref_);
index += refEnd;
}
else
{
literal.Append(c);
}
index++;
}
if (literal.Length > 0)
{
tok.Add(literal.ToString());
canonicalBuilder.Append(literal.ToString());
}
tok.TrimExcess();
_tokens = tok.AsReadOnly();
_canonicalForm = canonicalBuilder.ToString();
}
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());
}
public ArrayPathElement(string key) :
base(key)
{
if (key[0] != '[' || key[key.Length - 1] != ']')
{
throw new SpecException("Invalid ArrayPathElement key:" + key);
}
ArrayPathType apt;
IPathReference r = null;
TransposePathElement tpe = null;
string aI = "";
if (key.Length == 2)
{
apt = ArrayPathType.AUTO_EXPAND;
_canonicalForm = "[]";
}
else
{
string meat = key.Substring(1, key.Length - 2);
char firstChar = meat[0];
if (AmpReference.TOKEN == firstChar)
{
r = new AmpReference(meat);
apt = ArrayPathType.REFERENCE;
_canonicalForm = "[" + r.GetCanonicalForm() + "]";
}
else if (HashReference.TOKEN == firstChar)
{
r = new HashReference(meat);
apt = ArrayPathType.HASH;
_canonicalForm = "[" + r.GetCanonicalForm() + "]";
}
else if ('@' == firstChar)
{
apt = ArrayPathType.TRANSPOSE;
tpe = TransposePathElement.Parse(meat);
_canonicalForm = "[" + tpe.GetCanonicalForm() + "]";
}
else
{
aI = VerifyStringIsNonNegativeInteger(meat);
if (aI != null)
{
apt = ArrayPathType.EXPLICIT_INDEX;
_canonicalForm = "[" + aI + "]";
}
else
{
throw new SpecException("Bad explict array index:" + meat + " from key:" + key);
}
}
}
_transposePathElement = tpe;
_arrayPathType = apt;
_ref = r;
_arrayIndex = aI;
}
