/// <summary>
/// Method is used by Copy and Move to avoid duplicate code
/// </summary>
/// <param name="location">Location where value should be</param>
/// <param name="objectToGetValueFrom">Object to inspect for the desired value</param>
/// <param name="operationToReport">Operation to report in case of an error</param>
/// <returns>GetValueResult containing value and a bool signifying a possible error</returns>
private GetValueResult GetValueAtLocation(
string location,
object objectToGetValueFrom,
Operation operationToReport)
{
if (location == null)
{
throw new ArgumentNullException(nameof(location));
}
if (objectToGetValueFrom == null)
{
throw new ArgumentNullException(nameof(objectToGetValueFrom));
}
if (operationToReport == null)
{
throw new ArgumentNullException(nameof(operationToReport));
}
// get path result
var pathResult = GetActualPropertyPath(
location,
objectToGetValueFrom,
operationToReport);
if (pathResult == null)
{
return new GetValueResult(null, true);
}
var getAtEndOfList = pathResult.ExecuteAtEnd;
var positionAsInteger = pathResult.NumericEnd;
var actualPathToProperty = pathResult.PathToProperty;
var treeAnalysisResult = new ObjectTreeAnalysisResult(
objectToGetValueFrom,
actualPathToProperty,
ContractResolver);
if (treeAnalysisResult.UseDynamicLogic)
{
// if it's not an array, we can remove the property from
// the dictionary. If it's an array, we need to check the position first.
if (getAtEndOfList || positionAsInteger > -1)
{
var propertyValue = treeAnalysisResult.Container
.GetValueForCaseInsensitiveKey(treeAnalysisResult.PropertyPathInParent);
// we cannot continue when the value is null, because to be able to
// continue we need to be able to check if the array is a non-string array
if (propertyValue == null)
{
LogError(new JsonPatchError(
objectToGetValueFrom,
operationToReport,
Resources.FormatCannotDeterminePropertyType(location)));
return new GetValueResult(null, true);
}
var typeOfPathProperty = propertyValue.GetType();
if (!IsNonStringArray(typeOfPathProperty))
{
LogError(new JsonPatchError(
objectToGetValueFrom,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(operationToReport.op, location)));
return new GetValueResult(null, true);
}
// get the array
var array = (IList)treeAnalysisResult.Container.GetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent);
if (positionAsInteger >= array.Count)
{
LogError(new JsonPatchError(
objectToGetValueFrom,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(
operationToReport.op,
location)));
return new GetValueResult(null, true);
}
if (getAtEndOfList)
{
return new GetValueResult(array[array.Count - 1], false);
}
else
{
return new GetValueResult(array[positionAsInteger], false);
}
}
else
{
// get the property
var propertyValueAtLocation = treeAnalysisResult.Container.GetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent);
return new GetValueResult(propertyValueAtLocation, false);
}
}
else
{
// not dynamic
var patchProperty = treeAnalysisResult.JsonPatchProperty;
if (getAtEndOfList || positionAsInteger > -1)
{
if (!IsNonStringArray(patchProperty.Property.PropertyType))
{
LogError(new JsonPatchError(
objectToGetValueFrom,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(operationToReport.op, location)));
return new GetValueResult(null, true);
}
if (!patchProperty.Property.Readable)
{
LogError(new JsonPatchError(
objectToGetValueFrom,
operationToReport,
Resources.FormatCannotReadProperty(location)));
return new GetValueResult(null, true);
}
var array = (IList)patchProperty.Property.ValueProvider
.GetValue(patchProperty.Parent);
if (positionAsInteger >= array.Count)
{
LogError(new JsonPatchError(
objectToGetValueFrom,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(
operationToReport.op,
location)));
return new GetValueResult(null, true);
}
if (getAtEndOfList)
{
return new GetValueResult(array[array.Count - 1], false);
}
else
{
return new GetValueResult(array[positionAsInteger], false);
}
}
else
{
if (!patchProperty.Property.Readable)
{
LogError(new JsonPatchError(
objectToGetValueFrom,
operationToReport,
Resources.FormatCannotReadProperty(
location)));
return new GetValueResult(null, true);
}
var propertyValueAtLocation = patchProperty.Property.ValueProvider
.GetValue(patchProperty.Parent);
return new GetValueResult(propertyValueAtLocation, false);
}
}
}
/// <summary>
/// Add is used by various operations (eg: add, copy, ...), yet through different operations;
/// This method allows code reuse yet reporting the correct operation on error
/// </summary>
private void Add(
[NotNull] string path,
object value,
[NotNull] object objectToApplyTo,
[NotNull] Operation operationToReport)
{
// first up: if the path ends in a numeric value, we're inserting in a list and
// that value represents the position; if the path ends in "-", we're appending
// to the list.
// get path result
var pathResult = GetActualPropertyPath(
path,
objectToApplyTo,
operationToReport);
if (pathResult == null)
{
return;
}
var appendList = pathResult.ExecuteAtEnd;
var positionAsInteger = pathResult.NumericEnd;
var actualPathToProperty = pathResult.PathToProperty;
var treeAnalysisResult = new ObjectTreeAnalysisResult(
objectToApplyTo,
actualPathToProperty,
ContractResolver);
if (!treeAnalysisResult.IsValidPathForAdd)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatPropertyCannotBeAdded(path)));
return;
}
if (treeAnalysisResult.UseDynamicLogic)
{
var container = treeAnalysisResult.Container;
if (container.ContainsCaseInsensitiveKey(treeAnalysisResult.PropertyPathInParent))
{
// Existing property.
// If it's not an array, we need to check if the value fits the property type
//
// If it's an array, we need to check if the value fits in that array type,
// and add it at the correct position (if allowed).
if (appendList || positionAsInteger > -1)
{
// get the actual type
var propertyValue = container.GetValueForCaseInsensitiveKey(treeAnalysisResult.PropertyPathInParent);
var typeOfPathProperty = value.GetType();
if (!IsNonStringArray(typeOfPathProperty))
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(operationToReport.op, path)));
return;
}
// now, get the generic type of the enumerable
var genericTypeOfArray = GetIListType(typeOfPathProperty);
var conversionResult = ConvertToActualType(genericTypeOfArray, value);
if (!conversionResult.CanBeConverted)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidValueForProperty(value, path)));
return;
}
// get value (it can be cast, we just checked that)
var array = treeAnalysisResult.Container.GetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent) as IList;
if (appendList)
{
array.Add(conversionResult.ConvertedInstance);
treeAnalysisResult.Container.SetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent, array);
}
else
{
// specified index must not be greater than
// the amount of items in the array
if (positionAsInteger > array.Count)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(
operationToReport.op,
path)));
return;
}
array.Insert(positionAsInteger, conversionResult.ConvertedInstance);
treeAnalysisResult.Container.SetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent, array);
}
}
else
{
// get the actual type
var typeOfPathProperty = treeAnalysisResult.Container
.GetValueForCaseInsensitiveKey(treeAnalysisResult.PropertyPathInParent).GetType();
// can the value be converted to the actual type?
var conversionResult = ConvertToActualType(typeOfPathProperty, value);
if (conversionResult.CanBeConverted)
{
treeAnalysisResult.Container.SetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent,
conversionResult.ConvertedInstance);
}
else
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidValueForProperty(conversionResult.ConvertedInstance, path)));
return;
}
}
}
else
{
// New property - add it.
treeAnalysisResult.Container.Add(treeAnalysisResult.PropertyPathInParent, value);
}
}
else
{
// If it's an array, add to that array. If it's not, we replace.
// is the path an array (but not a string (= char[]))? In this case,
// the path must end with "/position" or "/-", which we already determined before.
var patchProperty = treeAnalysisResult.JsonPatchProperty;
if (appendList || positionAsInteger > -1)
{
if (!IsNonStringArray(patchProperty.Property.PropertyType))
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(operationToReport.op, path)));
return;
}
// now, get the generic type of the IList<> from Property type.
var genericTypeOfArray = GetIListType(patchProperty.Property.PropertyType);
var conversionResult = ConvertToActualType(genericTypeOfArray, value);
if (!conversionResult.CanBeConverted)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidValueForProperty(conversionResult.ConvertedInstance, path)));
return;
}
if (!patchProperty.Property.Readable)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatCannotReadProperty(path)));
return;
}
var array = (IList)patchProperty.Property.ValueProvider.GetValue(patchProperty.Parent);
if (appendList)
{
array.Add(conversionResult.ConvertedInstance);
}
else if (positionAsInteger <= array.Count)
{
array.Insert(positionAsInteger, conversionResult.ConvertedInstance);
}
else
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(operationToReport.op, path)));
return;
}
}
else
{
var conversionResultTuple = ConvertToActualType(
patchProperty.Property.PropertyType,
value);
if (!conversionResultTuple.CanBeConverted)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidValueForProperty(value, path)));
return;
}
if (!patchProperty.Property.Writable)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatCannotUpdateProperty(path)));
return;
}
patchProperty.Property.ValueProvider.SetValue(
patchProperty.Parent,
conversionResultTuple.ConvertedInstance);
}
}
}
/// <summary>
/// Remove is used by various operations (eg: remove, move, ...), yet through different operations;
/// This method allows code reuse yet reporting the correct operation on error. The return value
/// contains the type of the item that has been removed (and a bool possibly signifying an error)
/// This can be used by other methods, like replace, to ensure that we can pass in the correctly
/// typed value to whatever method follows.
/// </summary>
private RemovedPropertyTypeResult Remove(string path, object objectToApplyTo, Operation operationToReport)
{
// get path result
var pathResult = GetActualPropertyPath(
path,
objectToApplyTo,
operationToReport);
if (pathResult == null)
{
return new RemovedPropertyTypeResult(null, true);
}
var removeFromList = pathResult.ExecuteAtEnd;
var positionAsInteger = pathResult.NumericEnd;
var actualPathToProperty = pathResult.PathToProperty;
var treeAnalysisResult = new ObjectTreeAnalysisResult(
objectToApplyTo,
actualPathToProperty,
ContractResolver);
if (!treeAnalysisResult.IsValidPathForRemove)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatPropertyCannotBeRemoved(path)));
return new RemovedPropertyTypeResult(null, true);
}
if (treeAnalysisResult.UseDynamicLogic)
{
// if it's not an array, we can remove the property from
// the dictionary. If it's an array, we need to check the position first.
if (removeFromList || positionAsInteger > -1)
{
var propertyValue = treeAnalysisResult.Container
.GetValueForCaseInsensitiveKey(treeAnalysisResult.PropertyPathInParent);
// we cannot continue when the value is null, because to be able to
// continue we need to be able to check if the array is a non-string array
if (propertyValue == null)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatCannotDeterminePropertyType(path)));
return new RemovedPropertyTypeResult(null, true);
}
var typeOfPathProperty = propertyValue.GetType();
if (!IsNonStringArray(typeOfPathProperty))
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(operationToReport.op, path)));
return new RemovedPropertyTypeResult(null, true);
}
// now, get the generic type of the enumerable (we'll return this type)
var genericTypeOfArray = GetIListType(typeOfPathProperty);
// get the array
var array = (IList)treeAnalysisResult.Container.GetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent);
if (array.Count == 0)
{
// if the array is empty, we should throw an error
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(
operationToReport.op,
path)));
return new RemovedPropertyTypeResult(null, true);
}
if (removeFromList)
{
array.RemoveAt(array.Count - 1);
treeAnalysisResult.Container.SetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent, array);
// return the type of the value that has been removed.
return new RemovedPropertyTypeResult(genericTypeOfArray, false);
}
else
{
if (positionAsInteger >= array.Count)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(
operationToReport.op,
path)));
return new RemovedPropertyTypeResult(null, true);
}
array.RemoveAt(positionAsInteger);
treeAnalysisResult.Container.SetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent, array);
// return the type of the value that has been removed.
return new RemovedPropertyTypeResult(genericTypeOfArray, false);
}
}
else
{
// get the property
var getResult = treeAnalysisResult.Container.GetValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent);
// remove the property
treeAnalysisResult.Container.RemoveValueForCaseInsensitiveKey(
treeAnalysisResult.PropertyPathInParent);
// value is not null, we can determine the type
if (getResult != null)
{
var actualType = getResult.GetType();
return new RemovedPropertyTypeResult(actualType, false);
}
else
{
return new RemovedPropertyTypeResult(null, false);
}
}
}
else
{
// not dynamic
var patchProperty = treeAnalysisResult.JsonPatchProperty;
if (removeFromList || positionAsInteger > -1)
{
if (!IsNonStringArray(patchProperty.Property.PropertyType))
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(operationToReport.op, path)));
return new RemovedPropertyTypeResult(null, true);
}
// now, get the generic type of the IList<> from Property type.
var genericTypeOfArray = GetIListType(patchProperty.Property.PropertyType);
if (!patchProperty.Property.Readable)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatCannotReadProperty(path)));
return new RemovedPropertyTypeResult(null, true);
}
var array = (IList)patchProperty.Property.ValueProvider
.GetValue(patchProperty.Parent);
if (array.Count == 0)
{
// if the array is empty, we should throw an error
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(
operationToReport.op,
path)));
return new RemovedPropertyTypeResult(null, true);
}
if (removeFromList)
{
array.RemoveAt(array.Count - 1);
// return the type of the value that has been removed
return new RemovedPropertyTypeResult(genericTypeOfArray, false);
}
else
{
if (positionAsInteger >= array.Count)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatInvalidIndexForArrayProperty(
operationToReport.op,
path)));
return new RemovedPropertyTypeResult(null, true);
}
array.RemoveAt(positionAsInteger);
// return the type of the value that has been removed
return new RemovedPropertyTypeResult(genericTypeOfArray, false);
}
}
else
{
if (!patchProperty.Property.Writable)
{
LogError(new JsonPatchError(
objectToApplyTo,
operationToReport,
Resources.FormatCannotUpdateProperty(path)));
return new RemovedPropertyTypeResult(null, true);
}
// setting the value to "null" will use the default value in case of value types, and
// null in case of reference types
object value = null;
if (patchProperty.Property.PropertyType.GetTypeInfo().IsValueType
&& Nullable.GetUnderlyingType(patchProperty.Property.PropertyType) == null)
{
value = Activator.CreateInstance(patchProperty.Property.PropertyType);
}
patchProperty.Property.ValueProvider.SetValue(patchProperty.Parent, value);
return new RemovedPropertyTypeResult(patchProperty.Property.PropertyType, false);
}
}
}
