/**
* Creates an empty map/list, as required by spec, in the parent map/list at given key/index
*
* @param keyOrIndex of the parent object to create
* @param walkedPath containing the parent object
* @param opMode to determine if this write operation is allowed
* @return newly created object
*/
public JToken Create(string keyOrIndex, WalkedPath walkedPath, OpMode opMode)
{
object parent = walkedPath.LastElement().TreeRef;
int? origSizeOptional = walkedPath.LastElement().OrigSize;
if (!Int32.TryParse(keyOrIndex, out int index))
{
index = -1;
}
JToken value = null;
if (parent is JObject map && opMode.IsApplicable(map, keyOrIndex))
{
map[keyOrIndex] = value = CreateValue();
}
public override void ProcessList(IOrderedCompositeSpec spec, JArray inputList, WalkedPath walkedPath, JObject output, JObject context)
{
int?originalSize = walkedPath.LastElement().OrigSize;
foreach (var kv in spec.GetLiteralChildren())
{
JToken subInputOptional = null;
// If the data is an Array, but the spec keys are Non-Integer Strings,
// we are annoyed, but we don't stop the whole transform.
// Just this part of the Transform won't work.
if (Int32.TryParse(kv.Key, out int keyInt) &&
keyInt >= 0 && keyInt < inputList.Count)
{
// if the input in not available in the list use null or else get value,
// then lookup and place a default value as defined in spec there
JToken subInput = inputList[keyInt];
if ((subInput != null && subInput.Type != JTokenType.Null) |
!originalSize.HasValue || keyInt < originalSize.Value)
{
subInputOptional = subInput;
}
}
kv.Value.Apply(kv.Key, subInputOptional, walkedPath, output, context);
}
}
public override void ProcessList(IOrderedCompositeSpec spec, JArray inputList, WalkedPath walkedPath, JObject output, JObject context)
{
int?originalSize = walkedPath.LastElement().OrigSize;
foreach (var kv in spec.GetLiteralChildren())
{
// If the data is an Array, but the spec keys are Non-Integer Strings,
// we are annoyed, but we don't stop the whole transform.
// Just this part of the Transform won't work.
if (Int32.TryParse(kv.Key, out int keyInt) &&
// Do not work if the index is outside of the input list
keyInt < inputList.Count)
{
// XXX: does this make sense? can you have a literal null in JArray?
JToken subInput = inputList[keyInt];
JToken subInputOptional;
if (subInput == null && originalSize.HasValue && keyInt >= originalSize.Value)
{
subInputOptional = null;
}
else
{
subInputOptional = subInput;
}
kv.Value.Apply(kv.Key, subInputOptional, walkedPath, output, context);
}
}
}
public MatchedElement Match(string dataKey, WalkedPath walkedPath)
{
int?origSizeOptional = walkedPath.LastElement().OrigSize;
if (origSizeOptional.HasValue)
{
return(new ArrayMatchedElement(dataKey, origSizeOptional.Value));
}
else
{
return(new MatchedElement(dataKey));
}
}
public MatchedElement Match(string dataKey, WalkedPath walkedPath)
{
string evaled = Evaluate(walkedPath);
if (evaled == dataKey)
{
int?origSizeOptional = walkedPath.LastElement().OrigSize;
if (origSizeOptional.HasValue)
{
return(new ArrayMatchedElement(evaled, origSizeOptional.Value));
}
else
{
return(null);
}
}
return(null);
}
/**
* If this Spec matches the inputKey, then perform one step in the Shiftr parallel treewalk.
*
* Step one level down the input "tree" by carefully handling the List/Map nature the input to
* get the "one level down" data.
*
* Step one level down the Spec tree by carefully and efficiently applying our children to the
* "one level down" data.
*
* @return true if this this spec "handles" the inputKey such that no sibling specs need to see it
*/
public override bool Apply(string inputKey, JToken inputOptional, WalkedPath walkedPath, JObject output, JObject context)
{
MatchedElement thisLevel = _pathElement.Match(inputKey, walkedPath);
if (thisLevel == null)
{
return(false);
}
// If we are a TransposePathElement, try to swap the "input" with what we lookup from the Transpose
if (_pathElement is TransposePathElement tpe)
{
// Note the data found may not be a string, thus we have to call the special objectEvaluate
// Optional, because the input data could have been a valid null.
var optional = tpe.ObjectEvaluate(walkedPath);
if (optional == null)
{
return(false);
}
inputOptional = optional;
}
// add ourselves to the path, so that our children can reference us
walkedPath.Add(inputOptional, thisLevel);
// Handle any special / key based children first, but don't have them block anything
foreach (ShiftrSpec subSpec in _specialChildren)
{
subSpec.Apply(inputKey, inputOptional, walkedPath, output, context);
}
// Handle the rest of the children
_executionStrategy.Process(this, inputOptional, walkedPath, output, context);
// We are done, so remove ourselves from the walkedPath
walkedPath.RemoveLast();
// we matched so increment the matchCount of our parent
walkedPath.LastElement().MatchedElement.IncrementHashCount();
return(true);
}
public override void ProcessList(IOrderedCompositeSpec spec, JArray inputList, WalkedPath walkedPath, JObject output, JObject context)
{
int?originalSize = walkedPath.LastElement().OrigSize;
for (int index = 0; index < inputList.Count; index++)
{
JToken subInput = inputList[index];
string subKeyStr = index.ToString();
JToken subInputOptional;
if (subInput == null && originalSize.HasValue && index >= originalSize.Value)
{
subInputOptional = null;
}
else
{
subInputOptional = subInput;
}
ApplyKeyToComputed(spec.GetComputedChildren(), walkedPath, output, subKeyStr, subInputOptional, context);
}
}
/**
* If this Spec matches the inputkey, then do the work of outputting data and return true.
*
* @return true if this this spec "handles" the inputkey such that no sibling specs need to see it
*/
public override bool Apply(string inputKey, JToken inputOptional, WalkedPath walkedPath, JObject output, JObject context)
{
JToken input = inputOptional;
MatchedElement thisLevel = _pathElement.Match(inputKey, walkedPath);
if (thisLevel == null)
{
return(false);
}
JToken data;
bool realChild = false; // by default don't block further Shiftr matches
if (_pathElement is DollarPathElement ||
_pathElement is HashPathElement)
{
// The data is already encoded in the thisLevel object created by the pathElement.match called above
data = thisLevel.GetCanonicalForm();
}
else if (_pathElement is AtPathElement)
{
// The data is our parent's data
data = input;
}
else if (_pathElement is TransposePathElement tpe)
{
// We try to walk down the tree to find the value / data we want
// Note the data found may not be a string, thus we have to call the special objectEvaluate
var evaledData = tpe.ObjectEvaluate(walkedPath);
if (evaledData != null)
{
data = evaledData;
}
else
{
// if we could not find the value we want looking down the tree, bail
return(false);
}
}
else
{
// the data is the input
data = input;
// tell our parent that we matched and no further processing for this inputKey should be done
realChild = true;
}
// Add our the LiteralPathElement for this level, so that write path References can use it as &(0,0)
walkedPath.Add(input, thisLevel);
// Write out the data
foreach (PathEvaluatingTraversal outputPath in _shiftrWriters)
{
outputPath.Write(data, output, walkedPath);
}
walkedPath.RemoveLast();
if (realChild)
{
// we were a "real" child, so increment the matchCount of our parent
walkedPath.LastElement().MatchedElement.IncrementHashCount();
}
return(realChild);
}
public MatchedElement Match(string dataKey, WalkedPath walkedPath)
{
return(walkedPath.LastElement().MatchedElement); // copy what our parent was so that write keys of &0 and &1 both work.
}