/// <summary>
/// Converts a Json Schema string to a <see cref="ModelMetadata"/>
/// </summary>
/// <param name="modelName">The name of the model.</param>
/// <param name="jsonSchema">The Json Schema to be converted</param>
/// <returns>An flattened representation of the Json Schema in the form of <see cref="ModelMetadata"/></returns>
public ModelMetadata Convert(string modelName, string jsonSchema)
{
ModelName = modelName;
_modelMetadata = new ModelMetadata();
_schema = JsonSchema.FromText(jsonSchema);
var schemaUri = _schema.GetKeyword <IdKeyword>().Id;
_schemaXsdMetadata = _schemaAnalyzer.AnalyzeSchema(_schema, schemaUri);
ProcessSchema(_schema);
return(_modelMetadata);
}
/// <summary>
/// Determines the type of root model the provided schema has.
/// </summary>
/// <param name="schema">The Json Schema to analyze.</param>
protected void DetermineRootModel(JsonSchema schema)
{
Metadata.HasInlineRoot = true;
var allOf = schema.GetKeyword <AllOfKeyword>();
var anyOf = schema.GetKeyword <AnyOfKeyword>();
var oneOf = schema.GetKeyword <OneOfKeyword>();
if (allOf != null && anyOf == null && oneOf == null)
{
// Only "allOf"
Metadata.HasInlineRoot = !(allOf.Schemas.Count == 1 && IsRefSchema(allOf.Schemas[0]));
}
else if (allOf == null && anyOf != null && oneOf == null)
{
// Only "anyOf"
Metadata.HasInlineRoot = !(anyOf.Schemas.Count == 1 && IsRefSchema(anyOf.Schemas[0]));
}
else if (allOf == null && anyOf == null && oneOf != null)
{
// Only "oneOf"
Metadata.HasInlineRoot = !(oneOf.Schemas.Count == 1 && IsRefSchema(oneOf.Schemas[0]));
}
}
public void Constructor_TemplateExists_ShouldSetCorrectValues()
{
// Arrange
JsonSchemaKeywords.RegisterXsdKeywords();
var expectedId = "https://dev.altinn.studio/org/repository/app/model/model.schema.json";
// Act
var actualJsonTemplate = new SeresJsonTemplate(new Uri(expectedId), "melding");
// Assert
JsonSchema jsonSchema = JsonSchema.FromText(actualJsonTemplate.GetJsonString());
var idKeyword = jsonSchema.GetKeyword <IdKeyword>();
idKeyword.Id.Should().Be(expectedId);
var infoKeyword = jsonSchema.GetKeyword <InfoKeyword>();
var value = infoKeyword.Value;
value.GetProperty("meldingsnavn").GetString().Should().Be("melding");
value.GetProperty("modellnavn").GetString().Should().Be("melding-modell");
var messageType = jsonSchema.FollowReference(JsonPointer.Parse("#/$defs/melding-modell")).Should().NotBeNull();
}
/// <summary>
/// Tries to parse a schema to verify if it an array and returns the item schema if it is.
/// For furter reference see https://json-schema.org/understanding-json-schema/reference/array.html
/// </summary>
/// <param name="schema">The Json Schema to analyze.</param>
/// <param name="itemsSchema">If the schema is an array this will return schema for the items in the array; otherwise, null.</param>
/// <returns>True if the schema is an array; otherwise, false</returns>
protected static bool TryParseAsArray(JsonSchema schema, out JsonSchema itemsSchema)
{
if (schema.TryGetKeyword(out TypeKeyword typeKeyword) && typeKeyword.Type.HasFlag(SchemaValueType.Array))
{
var itemsKeyword = schema.GetKeyword <ItemsKeyword>();
if (itemsKeyword == null)
{
throw new JsonSchemaConvertException("Schema must have an \"items\" keyword when \"type\" is set to array");
}
itemsSchema = itemsKeyword.SingleSchema;
return(true);
}
itemsSchema = null;
return(false);
}
private static List <(string PropertyName, JsonSchema PropertySchema)> FindSimpleContentProperties(JsonSchema schema)
{
var properties = new List <(string PropertyName, JsonSchema PropertySchema)>();
if (HasSingleAllOf(schema))
{
foreach (var propertiesSchema in schema.GetKeyword <AllOfKeyword>().Schemas.Where(s => s.HasKeyword <PropertiesKeyword>()))
{
var propertiesKeyword = propertiesSchema.GetKeyword <PropertiesKeyword>();
properties.AddRange(propertiesKeyword.Properties.Select(prop => (prop.Key, prop.Value)));
}
}
else if (schema.TryGetKeyword(out PropertiesKeyword propertiesKeyword))
{
properties.AddRange(propertiesKeyword.Properties.Select(prop => (prop.Key, prop.Value)));
}
return(properties);
}
/// <summary>
/// Determines if the schema should be represented as a SimpleContentRestriction in the XSD.
/// </summary>
/// <param name="schema">The Json Schema to analyze.</param>
/// <returns>True if it should be represented as a SimpleContentRestriction in the XSD; otherwise, false.</returns>
protected bool IsValidSimpleContentRestriction(JsonSchema schema)
{
if (!HasSingleAllOf(schema))
{
return(false);
}
var allOf = schema.GetKeyword <AllOfKeyword>();
var baseReferenceSchemas = allOf.Schemas.Where(s => s.HasKeyword <RefKeyword>()).ToList();
if (baseReferenceSchemas.Count != 1)
{
return(false);
}
var baseReferenceSchema = baseReferenceSchemas[0];
var baseSchema = FollowReference(baseReferenceSchema.GetKeyword <RefKeyword>());
// Make sure base is valid for SimpleContent restriction
if (!IsValidSimpleContentExtension(baseSchema) && !IsValidSimpleContentRestriction(baseSchema))
{
return(false);
}
var propertiesSchemas = allOf.Schemas.Where(s => s.HasKeyword <PropertiesKeyword>()).ToList();
// Don't allow extra subschemas not used in the pattern
if (propertiesSchemas.Count + 1 != allOf.Schemas.Count)
{
return(false);
}
// All restriction properties must match properties from base type(s)
var basePropertyNames = new HashSet <string>();
while (!IsValidSimpleType(baseSchema))
{
foreach (var(propertyName, _) in FindSimpleContentProperties(baseSchema))
{
basePropertyNames.Add(propertyName);
}
if (!baseSchema.TryGetKeyword(out AllOfKeyword baseAllOf))
{
break;
}
var baseRefSchema = baseAllOf.Schemas
.SingleOrDefault(s => s.HasKeyword <RefKeyword>())
?.GetKeyword <RefKeyword>();
if (baseRefSchema == null)
{
break;
}
baseSchema = FollowReference(baseRefSchema);
}
var hasValueProperty = false;
foreach (var(propertyName, propertySchema) in propertiesSchemas.SelectMany(ps => ps.GetKeyword <PropertiesKeyword>().Properties.Select(prop => (prop.Key, prop.Value))))
{
if (!basePropertyNames.Contains(propertyName))
{
// Can't restrict a property that is not present in base types, this is not a valid simple content restriction
return(false);
}
var propertyTargetSchema = FollowReferencesIfAny(propertySchema);
if (!hasValueProperty && propertyName == "value")
{
// "value" property
hasValueProperty = true;
// "value" property cannot be an attribute
if (propertySchema.HasKeyword <XsdAttributeKeyword>())
{
return(false);
}
}
else
{
// restriction property must be an attribute
if (!propertySchema.HasKeyword <XsdAttributeKeyword>())
{
return(false);
}
}
if (!IsValidSimpleTypeOrSimpleTypeRestriction(propertyTargetSchema) && !IsPlainRestrictionSchema(propertyTargetSchema))
{
return(false);
}
}
return(hasValueProperty);
}
