private static void ReplaceRefs(JSONSchema schema, JSONSchema root)
{
ReplaceRefsInDictionary(schema.Properties, root);
ReplaceRefsInDictionary(schema.Definitions, root);
ReplaceRefsInDictionary(schema.PatternProperties, root);
if (schema.AdditionalProperties != null)
{
ReplaceRefsInAnyOf <bool, JSONSchema>(schema.AdditionalProperties, root);
}
if (schema.AdditionalItems != null)
{
ReplaceRefsInAnyOf <bool, JSONSchema>(schema.AdditionalItems, root);
}
if (schema.Items != null)
{
ReplaceRefsInAnyOf <JSONSchema, SchemaArray>(schema.Items, root);
}
ReplaceRefsInSchemaArray(schema.AnyOf, root);
ReplaceRefsInSchemaArray(schema.AllOf, root);
ReplaceRefsInSchemaArray(schema.OneOf, root);
if (schema.Not?.Ref != null)
{
schema.Not = convertRefToSchema(schema.Not.Ref, root);
}
}
private static void ReplaceRefsInSchemaArray(SchemaArray array, JSONSchema root)
{
if (array?.Count > 0)
{
for (int i = 0; i < array.Count; i++)
{
if (array[i]?.Ref != null)
{
array[i] = convertRefToSchema(array[i].Ref, root);
}
else
{
ReplaceRefs(array[i], root);
}
}
}
}
private Type ComputeType(JSONSchema schema)
{
if (schema.Type?.GetUnderlyingType() == typeof(SimpleType))
{
var simpleType = schema.Type.Value as SimpleType;
switch (simpleType.Value)
{
case SimpleType.Boolean:
return(typeof(Boolean));
case SimpleType.String:
return(typeof(string));
case SimpleType.Integer:
return(typeof(Int32));
case SimpleType.Number:
return(typeof(Decimal));
case SimpleType.Object:
return(typeof(object));
case SimpleType.Array:
if (schema.Items?.Value is JSONSchema)
{
var itemsSchema = schema.Items.Value as JSONSchema;
if (context.ContainsKey(itemsSchema))
{
return(typeof(List <>).MakeGenericType(context[itemsSchema].Type));
}
else
{
return(typeof(List <>).MakeGenericType(ComputeType(itemsSchema)));
}
}
return(typeof(IList));
default:
return(typeof(object));
}
}
return(typeof(object));
}
private static JSONSchema convertRefToSchema(string @ref, JSONSchema root)
{
if (@ref.Equals("#"))
{
return(root);
}
else
{
var paths = @ref.Split('/');
if (paths.Length == 3 && paths[0].Equals("#") && paths[1].Equals("definitions"))
{
return(root.Definitions[paths[2]]);
}
else
{
throw new NotImplementedException("this type of reference is not supported");
}
}
}
private static void ReplaceRefsInAnyOf <T1, T2>(AnyOf <T1, T2> anyOf, JSONSchema root)
{
if (anyOf?.GetValue() is JSONSchema)
{
var anyOfSchema = (JSONSchema)anyOf.GetValue();
if (anyOfSchema?.Ref != null)
{
anyOf.ChangeValue(convertRefToSchema(anyOfSchema.Ref, root));
}
else
{
ReplaceRefs(anyOfSchema, root);
}
}
if (anyOf?.GetValue() is SchemaArray)
{
var anyOfSchema = (SchemaArray)anyOf.GetValue();
ReplaceRefsInSchemaArray(anyOfSchema, root);
}
}
public static JSONSchema MergeSchemas(SchemaArray schemas)
{
JSONSchema result = new JSONSchema();
//handle recursivity
schemas = new SchemaArray(
schemas.Where(x => x.AllOf == null || !x.AllOf.Any())
.Union(
schemas.Where(x => x.AllOf != null && x.AllOf.Any())
.Select(x => MergeSchemas(x.AllOf))).ToList());
//This won't raise an exception if different (incompatible) types are defined
result.Type = schemas.Where(x => x.Type != null).Select(x => x.Type).FirstOrDefault();
var multiples = schemas.Where(x => x.MultipleOf.HasValue).Select(x => x.MultipleOf.Value);
if (multiples.Any())
{
result.MultipleOf = multiples.Aggregate((uint)1, (lcm, next) => LCM(lcm, next));
}
var max = schemas.Where(x => x.Maximum.HasValue).Select(x => x.Maximum);
if (max.Any())
{
result.Maximum = max.Min();
result.ExclusiveMaximum = schemas.Where(x => x.ExclusiveMaximum.HasValue && x.Maximum == result.Maximum).Select(x => x.ExclusiveMaximum).FirstOrDefault();
}
var min = schemas.Where(x => x.Mininum.HasValue).Select(x => x.Mininum);
if (min.Any())
{
result.Mininum = min.Max();
result.ExclusiveMinimum = schemas.Where(x => x.ExclusiveMinimum.HasValue && x.Mininum == result.Mininum).Select(x => x.ExclusiveMinimum).FirstOrDefault();
}
var maxLength = schemas.Where(x => x.MaxLength.HasValue).Select(x => x.MaxLength);
if (maxLength.Any())
{
result.MaxLength = maxLength.Min();
}
var minLength = schemas.Where(x => x.MinLength.HasValue).Select(x => x.MinLength);
if (minLength.Count() > 0)
{
result.MinLength = minLength.Max();
}
var patterns = schemas.Where(x => !string.IsNullOrEmpty(x.Pattern)).Select(x => x.Pattern);
if (patterns.Any())
{
result.Pattern = string.Concat(patterns.Select(x => string.Format("(?={0})", x)));
}
//TODO: items
var maxItems = schemas.Where(x => x.MaxItems.HasValue).Select(x => x.MaxItems);
if (maxItems.Any())
{
result.MaxItems = maxItems.Min();
}
var minItems = schemas.Where(x => x.MinItems.HasValue).Select(x => x.MinItems);
if (minItems.Any())
{
result.MinItems = minItems.Max();
}
var properties = schemas.Where(x => x.Properties != null && x.Properties.Any()).Select(x => x.Properties);
if (properties.Any())
{
result.Properties = properties.SelectMany(dict => dict)
.ToLookup(pair => pair.Key, pair => pair.Value)
.ToDictionary(group => group.Key, group => group.First());
}
return(result);
}
private static void ReplaceRefsInDictionary(Dictionary <string, JSONSchema> dictionary, JSONSchema root)
{
if (dictionary != null)
{
var keyList = new List <string>(dictionary.Keys);
foreach (string property in keyList)
{
if (dictionary[property]?.Ref != null)
{
dictionary[property] = convertRefToSchema(dictionary[property].Ref, root);
}
else
{
ReplaceRefs(dictionary[property], root);
}
}
}
}
private Type GetEnumType(JSONSchema schema)
{
if (schema.Type != null && schema.Type.Value is SimpleType)
{
return(ComputeType(schema));
}
if (schema.Type == null)
{
HashSet <JsonValueKind> types = new HashSet <JsonValueKind>();
foreach (JsonElement enumValue in schema.Enum)
{
types.Add(enumValue.ValueKind);
}
if (types.Count() == 1)
{
switch (types.First())
{
case JsonValueKind.String: return(typeof(string));
case JsonValueKind.Number: return(NumberDefaultType);
case JsonValueKind.True:
case JsonValueKind.False:
return(typeof(bool));
default:
return(typeof(object));
}
}
if (types.Count() == 2)
{
if (types.Contains(JsonValueKind.False) && types.Contains(JsonValueKind.True))
{
return(typeof(bool));
}
if (types.Contains(JsonValueKind.Null))
{
switch (types.Where(x => x != JsonValueKind.Null).First())
{
case JsonValueKind.String: return(typeof(string)); //strings can null
case JsonValueKind.Number: return(typeof(Nullable <>).MakeGenericType(NumberDefaultType));
case JsonValueKind.True:
case JsonValueKind.False:
return(typeof(Nullable <>).MakeGenericType(typeof(bool)));
default:
return(typeof(object)); //objects can be null
}
}
}
if (types.Count() == 3)
{
if (types.IsSubsetOf(new List <JsonValueKind> {
JsonValueKind.Null, JsonValueKind.False, JsonValueKind.True
}))
{
return(typeof(Nullable <>).MakeGenericType(typeof(bool)));
}
}
}
return(typeof(object));
}
private CodeTypeDeclaration GenerateClass()
{
if (!context.ContainsKey(schema))
{
context.Add(schema, new GenerationResult()
{
TypeName = targetClass.Name,
Type = MyTypeBuilder.CreateType(targetClass.Name),
ClassGenerator = this
});
}
if (schema.Enum?.Count > 0)
{
return(GenerateClassFromEnumSchema());
}
if (schema.Type?.Value is SimpleType && (schema.Type.Value as SimpleType).Value != SimpleType.Object)
{
var schemaType = schema.Type.Value as SimpleType;
if (schemaType.Value == SimpleType.Integer)
{
return(GenerateClassFromIntegerSchema());
}
if (schemaType.Value == SimpleType.Number)
{
return(GenerateClassFromNumberSchema());
}
if (schemaType.Value == SimpleType.String)
{
return(GenerateClassFromStringSchema());
}
if (schemaType.Value == SimpleType.Array)
{
return(GenerateClassFromArraySchema());
}
}
var definitions = schema.Definitions;
if (definitions != null)
{
foreach (string definitionName in schema.Definitions.Keys)
{
var definition = definitions[definitionName];
if (!context.ContainsKey(definition))
{
var nestedClassGenerator = new ClassGeneratorFromJsonSchema(definition, context);
context[definition] = new GenerationResult()
{
Type = MyTypeBuilder.CreateType(nestedClassGenerator.targetClass.Name),
TypeName = nestedClassGenerator.targetClass.Name,
ClassGenerator = nestedClassGenerator
};
nestedClassGenerator.GenerateClass();
}
//context.Add(definition, new GenerationResult() { TypeName = nestedClassGenerator.targetClass.Name });
}
}
var properties = schema.Properties;
var additionalProperties = schema.AdditionalProperties;
//Oneof/AnyOf/AllOf are only supported when there are no properties or additionalProperties and when the schema type is not a primitive type or array type
if (properties == null && additionalProperties == null)
{
if (schema.OneOf != null && schema.OneOf.Count > 0)
{
return(GenerateClassFromOneOfAnyOfSchema(true));
}
if (schema.AnyOf != null && schema.AnyOf.Count > 0)
{
return(GenerateClassFromOneOfAnyOfSchema(false));
}
if (schema.AllOf != null && schema.AllOf.Count > 0)
{
var mergedSchema = JSONSchema.MergeSchemas(schema.AllOf);
var mergedClassGenerator = new ClassGeneratorFromJsonSchema(mergedSchema, this.targetClass.Name);
targetClass = mergedClassGenerator.GenerateClass();
context[schema] = mergedClassGenerator.context[mergedSchema];
foreach (var jsonSchema in mergedClassGenerator.context.Keys)
{
if (jsonSchema != mergedSchema)
{
context[jsonSchema] = mergedClassGenerator.context[jsonSchema];
}
}
return(targetClass);
}
}
if (properties != null)
{
foreach (string propertyName in properties.Keys)
{
var cleanPropertyName = Clean(propertyName);
if (propertyNames.Contains(cleanPropertyName))
{
//to avoid property names that would collide
continue;
}
propertyNames.Add(cleanPropertyName);
var property = properties[propertyName];
if (context.ContainsKey(property))
{
targetClass.AddProperty(cleanPropertyName, context[property].TypeName);
}
else if (property.Type?.GetUnderlyingType() == typeof(SimpleType) &&
(property.Type.Value as SimpleType).Value != SimpleType.Object &&
(property.Type.Value as SimpleType).Value != SimpleType.Array &&
(property.Enum == null || property.Enum.Count < 1)
)
{
targetClass.AddProperty(cleanPropertyName, ComputeType((SimpleType)property.Type.GetValue()));
}
else
{
var nestedClassGenerator = new ClassGeneratorFromJsonSchema(property, context, cleanPropertyName);
context[property] = new GenerationResult()
{
Type = MyTypeBuilder.CreateType(nestedClassGenerator.targetClass.Name),
TypeName = nestedClassGenerator.targetClass.Name,
ClassGenerator = nestedClassGenerator
};
nestedClassGenerator.GenerateClass();
targetClass.AddProperty(cleanPropertyName, context[property].Type);
}
}
}
if (additionalProperties != null)
{
if (additionalProperties.Value is bool)
{
if ((bool)additionalProperties.Value == true)
{
targetClass.BaseTypes.Add(new CodeTypeReference(typeof(Dictionary <string, object>)));
}
}
else
{
var additionalPropertiesSchema = additionalProperties.Value as JSONSchema;
if (!context.ContainsKey(additionalPropertiesSchema))
{
var nestedClassGenerator = new ClassGeneratorFromJsonSchema(additionalPropertiesSchema, context, context[schema].TypeName + "AdditionalProperties");
context[additionalPropertiesSchema] = new GenerationResult()
{
Type = MyTypeBuilder.CreateType(nestedClassGenerator.targetClass.Name),
TypeName = nestedClassGenerator.targetClass.Name,
ClassGenerator = nestedClassGenerator
};
nestedClassGenerator.GenerateClass();
}
targetClass.BaseTypes.Add(new CodeTypeReference("Dictionary", new CodeTypeReference(typeof(string)), new CodeTypeReference(context[additionalPropertiesSchema].Type)));
context[schema].Imports.Add("System.Collections.Generic");
}
}
return(targetClass);
}
private ClassGeneratorFromJsonSchema(JSONSchema schema, Dictionary <JSONSchema, GenerationResult> context, string title = null) : base(title ?? schema.Title)
{
this.schema = schema;
this.context = context;
}
public ClassGeneratorFromJsonSchema(JSONSchema schema, string title = null) : base(title ?? schema.Title)
{
this.schema = schema;
context = new Dictionary <JSONSchema, GenerationResult>();
}