pos/is4c-nf/scale-drivers/drivers/NewMagellan/Newtonsoft.Json/Schema/JsonSchemaBuilder.cs
#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion
using System;
using System.Collections.Generic;
using Newtonsoft.Json.Serialization;
#if NET20
using Newtonsoft.Json.Utilities.LinqBridge;
#else
using System.Linq;
#endif
using System.Globalization;
using Newtonsoft.Json.Utilities;
using Newtonsoft.Json.Linq;
namespace Newtonsoft.Json.Schema
{
internal class JsonSchemaBuilder
{
private readonly IList<JsonSchema> _stack;
private readonly JsonSchemaResolver _resolver;
private readonly IDictionary<string, JsonSchema> _documentSchemas;
private JsonSchema _currentSchema;
private JObject _rootSchema;
public JsonSchemaBuilder(JsonSchemaResolver resolver)
{
_stack = new List<JsonSchema>();
_documentSchemas = new Dictionary<string, JsonSchema>();
_resolver = resolver;
}
private void Push(JsonSchema value)
{
_currentSchema = value;
_stack.Add(value);
_resolver.LoadedSchemas.Add(value);
_documentSchemas.Add(value.Location, value);
}
private JsonSchema Pop()
{
JsonSchema poppedSchema = _currentSchema;
_stack.RemoveAt(_stack.Count - 1);
_currentSchema = _stack.LastOrDefault();
return poppedSchema;
}
private JsonSchema CurrentSchema
{
get { return _currentSchema; }
}
internal JsonSchema Read(JsonReader reader)
{
JToken schemaToken = JToken.ReadFrom(reader);
_rootSchema = schemaToken as JObject;
JsonSchema schema = BuildSchema(schemaToken);
ResolveReferences(schema);
return schema;
}
private string UnescapeReference(string reference)
{
return Uri.UnescapeDataString(reference).Replace("~1", "/").Replace("~0", "~");
}
private JsonSchema ResolveReferences(JsonSchema schema)
{
if (schema.DeferredReference != null)
{
string reference = schema.DeferredReference;
bool locationReference = (reference.StartsWith("#", StringComparison.Ordinal));
if (locationReference)
reference = UnescapeReference(reference);
JsonSchema resolvedSchema = _resolver.GetSchema(reference);
if (resolvedSchema == null)
{
if (locationReference)
{
string[] escapedParts = schema.DeferredReference.TrimStart('#').Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
JToken currentToken = _rootSchema;
foreach (string escapedPart in escapedParts)
{
string part = UnescapeReference(escapedPart);
if (currentToken.Type == JTokenType.Object)
{
currentToken = currentToken[part];
}
else if (currentToken.Type == JTokenType.Array || currentToken.Type == JTokenType.Constructor)
{
int index;
if (int.TryParse(part, out index) && index >= 0 && index < currentToken.Count())
currentToken = currentToken[index];
else
currentToken = null;
}
if (currentToken == null)
break;
}
if (currentToken != null)
resolvedSchema = BuildSchema(currentToken);
}
if (resolvedSchema == null)
throw new JsonException("Could not resolve schema reference '{0}'.".FormatWith(CultureInfo.InvariantCulture, schema.DeferredReference));
}
schema = resolvedSchema;
}
if (schema.ReferencesResolved)
return schema;
schema.ReferencesResolved = true;
if (schema.Extends != null)
{
for (int i = 0; i < schema.Extends.Count; i++)
{
schema.Extends[i] = ResolveReferences(schema.Extends[i]);
}
}
if (schema.Items != null)
{
for (int i = 0; i < schema.Items.Count; i++)
{
schema.Items[i] = ResolveReferences(schema.Items[i]);
}
}
if (schema.AdditionalItems != null)
schema.AdditionalItems = ResolveReferences(schema.AdditionalItems);
if (schema.PatternProperties != null)
{
foreach (KeyValuePair<string, JsonSchema> patternProperty in schema.PatternProperties.ToList())
{
schema.PatternProperties[patternProperty.Key] = ResolveReferences(patternProperty.Value);
}
}
if (schema.Properties != null)
{
foreach (KeyValuePair<string, JsonSchema> property in schema.Properties.ToList())
{
schema.Properties[property.Key] = ResolveReferences(property.Value);
}
}
if (schema.AdditionalProperties != null)
schema.AdditionalProperties = ResolveReferences(schema.AdditionalProperties);
return schema;
}
private JsonSchema BuildSchema(JToken token)
{
JObject schemaObject = token as JObject;
if (schemaObject == null)
throw JsonException.Create(token, token.Path, "Expected object while parsing schema object, got {0}.".FormatWith(CultureInfo.InvariantCulture, token.Type));
JToken referenceToken;
if (schemaObject.TryGetValue(JsonTypeReflector.RefPropertyName, out referenceToken))
{
JsonSchema deferredSchema = new JsonSchema();
deferredSchema.DeferredReference = (string)referenceToken;
return deferredSchema;
}
string location = token.Path.Replace(".", "/").Replace("[", "/").Replace("]", string.Empty);
if (!string.IsNullOrEmpty(location))
location = "/" + location;
location = "#" + location;
JsonSchema existingSchema;
if (_documentSchemas.TryGetValue(location, out existingSchema))
return existingSchema;
Push(new JsonSchema { Location = location });
ProcessSchemaProperties(schemaObject);
return Pop();
}
private void ProcessSchemaProperties(JObject schemaObject)
{
foreach (KeyValuePair<string, JToken> property in schemaObject)
{
switch (property.Key)
{
case JsonSchemaConstants.TypePropertyName:
CurrentSchema.Type = ProcessType(property.Value);
break;
case JsonSchemaConstants.IdPropertyName:
CurrentSchema.Id = (string)property.Value;
break;
case JsonSchemaConstants.TitlePropertyName:
CurrentSchema.Title = (string)property.Value;
break;
case JsonSchemaConstants.DescriptionPropertyName:
CurrentSchema.Description = (string)property.Value;
break;
case JsonSchemaConstants.PropertiesPropertyName:
CurrentSchema.Properties = ProcessProperties(property.Value);
break;
case JsonSchemaConstants.ItemsPropertyName:
ProcessItems(property.Value);
break;
case JsonSchemaConstants.AdditionalPropertiesPropertyName:
ProcessAdditionalProperties(property.Value);
break;
case JsonSchemaConstants.AdditionalItemsPropertyName:
ProcessAdditionalItems(property.Value);
break;
case JsonSchemaConstants.PatternPropertiesPropertyName:
CurrentSchema.PatternProperties = ProcessProperties(property.Value);
break;
case JsonSchemaConstants.RequiredPropertyName:
CurrentSchema.Required = (bool)property.Value;
break;
case JsonSchemaConstants.RequiresPropertyName:
CurrentSchema.Requires = (string)property.Value;
break;
case JsonSchemaConstants.MinimumPropertyName:
CurrentSchema.Minimum = (double)property.Value;
break;
case JsonSchemaConstants.MaximumPropertyName:
CurrentSchema.Maximum = (double)property.Value;
break;
case JsonSchemaConstants.ExclusiveMinimumPropertyName:
CurrentSchema.ExclusiveMinimum = (bool)property.Value;
break;
case JsonSchemaConstants.ExclusiveMaximumPropertyName:
CurrentSchema.ExclusiveMaximum = (bool)property.Value;
break;
case JsonSchemaConstants.MaximumLengthPropertyName:
CurrentSchema.MaximumLength = (int)property.Value;
break;
case JsonSchemaConstants.MinimumLengthPropertyName:
CurrentSchema.MinimumLength = (int)property.Value;
break;
case JsonSchemaConstants.MaximumItemsPropertyName:
CurrentSchema.MaximumItems = (int)property.Value;
break;
case JsonSchemaConstants.MinimumItemsPropertyName:
CurrentSchema.MinimumItems = (int)property.Value;
break;
case JsonSchemaConstants.DivisibleByPropertyName:
CurrentSchema.DivisibleBy = (double)property.Value;
break;
case JsonSchemaConstants.DisallowPropertyName:
CurrentSchema.Disallow = ProcessType(property.Value);
break;
case JsonSchemaConstants.DefaultPropertyName:
CurrentSchema.Default = property.Value.DeepClone();
break;
case JsonSchemaConstants.HiddenPropertyName:
CurrentSchema.Hidden = (bool)property.Value;
break;
case JsonSchemaConstants.ReadOnlyPropertyName:
CurrentSchema.ReadOnly = (bool)property.Value;
break;
case JsonSchemaConstants.FormatPropertyName:
CurrentSchema.Format = (string)property.Value;
break;
case JsonSchemaConstants.PatternPropertyName:
CurrentSchema.Pattern = (string)property.Value;
break;
case JsonSchemaConstants.EnumPropertyName:
ProcessEnum(property.Value);
break;
case JsonSchemaConstants.ExtendsPropertyName:
ProcessExtends(property.Value);
break;
case JsonSchemaConstants.UniqueItemsPropertyName:
CurrentSchema.UniqueItems = (bool)property.Value;
break;
}
}
}
private void ProcessExtends(JToken token)
{
IList<JsonSchema> schemas = new List<JsonSchema>();
if (token.Type == JTokenType.Array)
{
foreach (JToken schemaObject in token)
{
schemas.Add(BuildSchema(schemaObject));
}
}
else
{
JsonSchema schema = BuildSchema(token);
if (schema != null)
schemas.Add(schema);
}
if (schemas.Count > 0)
CurrentSchema.Extends = schemas;
}
private void ProcessEnum(JToken token)
{
if (token.Type != JTokenType.Array)
throw JsonException.Create(token, token.Path, "Expected Array token while parsing enum values, got {0}.".FormatWith(CultureInfo.InvariantCulture, token.Type));
CurrentSchema.Enum = new List<JToken>();
foreach (JToken enumValue in token)
{
CurrentSchema.Enum.Add(enumValue.DeepClone());
}
}
private void ProcessAdditionalProperties(JToken token)
{
if (token.Type == JTokenType.Boolean)
CurrentSchema.AllowAdditionalProperties = (bool)token;
else
CurrentSchema.AdditionalProperties = BuildSchema(token);
}
private void ProcessAdditionalItems(JToken token)
{
if (token.Type == JTokenType.Boolean)
CurrentSchema.AllowAdditionalItems = (bool)token;
else
CurrentSchema.AdditionalItems = BuildSchema(token);
}
private IDictionary<string, JsonSchema> ProcessProperties(JToken token)
{
IDictionary<string, JsonSchema> properties = new Dictionary<string, JsonSchema>();
if (token.Type != JTokenType.Object)
throw JsonException.Create(token, token.Path, "Expected Object token while parsing schema properties, got {0}.".FormatWith(CultureInfo.InvariantCulture, token.Type));
foreach (JProperty propertyToken in token)
{
if (properties.ContainsKey(propertyToken.Name))
throw new JsonException("Property {0} has already been defined in schema.".FormatWith(CultureInfo.InvariantCulture, propertyToken.Name));
properties.Add(propertyToken.Name, BuildSchema(propertyToken.Value));
}
return properties;
}
private void ProcessItems(JToken token)
{
CurrentSchema.Items = new List<JsonSchema>();
switch (token.Type)
{
case JTokenType.Object:
CurrentSchema.Items.Add(BuildSchema(token));
CurrentSchema.PositionalItemsValidation = false;
break;
case JTokenType.Array:
CurrentSchema.PositionalItemsValidation = true;
foreach (JToken schemaToken in token)
{
CurrentSchema.Items.Add(BuildSchema(schemaToken));
}
break;
default:
throw JsonException.Create(token, token.Path, "Expected array or JSON schema object, got {0}.".FormatWith(CultureInfo.InvariantCulture, token.Type));
}
}
private JsonSchemaType? ProcessType(JToken token)
{
switch (token.Type)
{
case JTokenType.Array:
// ensure type is in blank state before ORing values
JsonSchemaType? type = JsonSchemaType.None;
foreach (JToken typeToken in token)
{
if (typeToken.Type != JTokenType.String)
throw JsonException.Create(typeToken, typeToken.Path, "Exception JSON schema type string token, got {0}.".FormatWith(CultureInfo.InvariantCulture, token.Type));
type = type | MapType((string)typeToken);
}
return type;
case JTokenType.String:
return MapType((string)token);
default:
throw JsonException.Create(token, token.Path, "Expected array or JSON schema type string token, got {0}.".FormatWith(CultureInfo.InvariantCulture, token.Type));
}
}
internal static JsonSchemaType MapType(string type)
{
JsonSchemaType mappedType;
if (!JsonSchemaConstants.JsonSchemaTypeMapping.TryGetValue(type, out mappedType))
throw new JsonException("Invalid JSON schema type: {0}".FormatWith(CultureInfo.InvariantCulture, type));
return mappedType;
}
internal static string MapType(JsonSchemaType type)
{
return JsonSchemaConstants.JsonSchemaTypeMapping.Single(kv => kv.Value == type).Key;
}
}
}