/// <summary>
/// Parse json and returns the representation.
/// </summary>
/// <exception cref="ArgumentNullException">Thrown when one of the parameter is null.</exception>
/// <param name="jObj">JSON</param>
/// <param name="attribute">Schema attribute</param>
/// <param name="checkStrategy">Strategy used to check the parameters.</param>
/// <returns>Representation or null.</returns>
public ParseRepresentationAttrResult GetRepresentation(JToken jObj, SchemaAttributeResponse attribute, CheckStrategies checkStrategy)
{
if (jObj == null)
{
throw new ArgumentNullException(nameof(jObj));
}
if (attribute == null)
{
throw new ArgumentNullException(nameof(attribute));
}
Action <ComplexSchemaAttributeResponse, List <RepresentationAttribute>, JToken, RepresentationAttribute> setRepresentationCallback = (attr, lst, tok, reprAttr) =>
{
foreach (var subAttribute in attr.SubAttributes)
{
var rep = GetRepresentation(tok, subAttribute, checkStrategy);
if (rep.IsParsed)
{
rep.RepresentationAttribute.Parent = reprAttr;
lst.Add(rep.RepresentationAttribute);
}
}
};
var token = jObj.SelectToken(attribute.Name);
// 1. Check the attribute is required
if (token == null)
{
if (attribute.Required && checkStrategy == CheckStrategies.Strong)
{
return(new ParseRepresentationAttrResult
{
IsParsed = false,
ErrorMessage = string.Format(ErrorMessages.TheAttributeIsRequired, attribute.Name)
});
}
// Add empty attribute.
return(GetEmptyToken(attribute));
}
// 2. Check is an array
JArray jArr = null;
if (attribute.MultiValued)
{
jArr = token as JArray;
if (jArr == null)
{
return(new ParseRepresentationAttrResult
{
IsParsed = false,
ErrorMessage = string.Format(ErrorMessages.TheAttributeIsNotAnArray, attribute.Name)
});
}
}
// 3. Create complex attribute
var complexAttribute = attribute as ComplexSchemaAttributeResponse;
if (complexAttribute != null)
{
var representation = new ComplexRepresentationAttribute(complexAttribute);
var values = new List <RepresentationAttribute>();
if (complexAttribute.MultiValued)
{
// 3.1 Contains an array
if (jArr.Count > 0)
{
foreach (var subToken in token)
{
var subRepresentation = new ComplexRepresentationAttribute(null);
var subValues = new List <RepresentationAttribute>();
setRepresentationCallback(complexAttribute, subValues, subToken, subRepresentation);
subRepresentation.Values = subValues;
values.Add(subRepresentation);
subRepresentation.Parent = representation;
}
}
else
{
values.Add(new ComplexRepresentationAttribute(null)
{
Values = new List <RepresentationAttribute>()
});
}
}
else
{
// 3.2 Doesn't contain array
setRepresentationCallback(complexAttribute, values, token, representation);
}
representation.Values = values;
return(new ParseRepresentationAttrResult
{
IsParsed = true,
RepresentationAttribute = representation
});
}
RepresentationAttribute result = null;
// 4. Create singular attribute.
// Note : Don't cast to object to avoid unecessaries boxing operations ...
switch (attribute.Type)
{
case Common.Constants.SchemaAttributeTypes.String:
result = GetSingularToken <string>(jArr, attribute, token);
break;
case Common.Constants.SchemaAttributeTypes.Boolean:
result = GetSingularToken <bool>(jArr, attribute, token);
break;
case Common.Constants.SchemaAttributeTypes.Decimal:
result = GetSingularToken <decimal>(jArr, attribute, token);
break;
case Common.Constants.SchemaAttributeTypes.DateTime:
result = GetSingularToken <DateTime>(jArr, attribute, token);
break;
case Common.Constants.SchemaAttributeTypes.Integer:
result = GetSingularToken <int>(jArr, attribute, token);
break;
default:
return(new ParseRepresentationAttrResult
{
IsParsed = false,
ErrorMessage = string.Format(ErrorMessages.TheAttributeTypeIsNotSupported, attribute.Type)
});
}
if (result == null)
{
return(new ParseRepresentationAttrResult
{
IsParsed = false,
ErrorMessage = string.Format(ErrorMessages.TheAttributeTypeIsNotCorrect, attribute.Name, attribute.Type)
});
}
return(new ParseRepresentationAttrResult
{
RepresentationAttribute = result,
IsParsed = true
});
}
/// <summary>
/// Parse JSON and returns its representation.
/// </summary>
/// <exception cref="ArgumentNullException">Thrown when a parameter is null or empty.</exception>
/// <exception cref="InvalidOperationException">Thrown when something goes wrong while trying to parse the JSON.</exception>
/// <param name="jObj">JSON</param>
/// <param name="schemaId">Schema identifier</param>
/// <param name="checkStrategy">Strategy used to check the parameters.</param>
/// <returns>Representation or null.</returns>
public async Task <ParseRepresentationResult> Parse(JToken jObj, string schemaId, CheckStrategies checkStrategy)
{
if (jObj == null)
{
throw new ArgumentNullException(nameof(jObj));
}
if (string.IsNullOrWhiteSpace(schemaId))
{
throw new ArgumentNullException(nameof(schemaId));
}
var schema = await _schemasStore.GetSchema(schemaId);
if (schema == null)
{
return(new ParseRepresentationResult
{
ErrorMessage = string.Format(ErrorMessages.TheSchemaDoesntExist, schemaId),
IsParsed = false
});
}
var representation = new Representation();
var attributes = new List <RepresentationAttribute>();
foreach (var attribute in schema.Attributes)
{
// 1. Ignore the attribute with readonly mutability
if (attribute.Mutability == Common.Constants.SchemaAttributeMutability.ReadOnly)
{
continue;
}
// 2. Add the attribute
var repr = GetRepresentation(jObj, attribute, checkStrategy);
if (repr.IsParsed)
{
attributes.Add(repr.RepresentationAttribute);
}
else
{
return(new ParseRepresentationResult
{
IsParsed = false,
ErrorMessage = repr.ErrorMessage
});
}
}
representation.Attributes = attributes;
return(new ParseRepresentationResult
{
IsParsed = true,
Representation = representation
});
}