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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Json;
using Newtonsoft.Json.Linq;
namespace System.Net.Http.Formatting
{
public class JTokenCreatorSurrogate : InstanceCreatorSurrogate
{
private const int MaxDepth = 4;
public override bool CanCreateInstanceOf(Type type)
{
return (type == typeof(JToken) || type == typeof(JArray) || type == typeof(JObject) || type == typeof(JValue));
}
public override object CreateInstanceOf(Type type, Random rndGen)
{
if (!this.CanCreateInstanceOf(type))
{
return null;
}
if (type == typeof(JToken))
{
return CreateJToken(rndGen, 0);
}
else if (type == typeof(JArray))
{
return CreateJArray(rndGen, 0);
}
else if (type == typeof(JObject))
{
return CreateJObject(rndGen, 0);
}
else
{
return CreateJsonPrimitive(rndGen);
}
}
private static JToken CreateJToken(Random rndGen, int depth)
{
if (rndGen.Next() < CreatorSettings.NullValueProbability)
{
return null;
}
if (depth < MaxDepth)
{
switch (rndGen.Next(10))
{
case 0:
case 1:
case 2:
// 30% chance to create an array
return CreateJArray(rndGen, depth);
case 3:
case 4:
case 5:
// 30% chance to create an object
return CreateJObject(rndGen, depth);
default:
// 40% chance to create a primitive
break;
}
}
return CreateJsonPrimitive(rndGen);
}
static JToken CreateJsonPrimitive(Random rndGen)
{
switch (rndGen.Next(17))
{
case 0:
return PrimitiveCreator.CreateInstanceOfChar(rndGen);
case 1:
return new JValue(PrimitiveCreator.CreateInstanceOfByte(rndGen));
case 2:
return PrimitiveCreator.CreateInstanceOfSByte(rndGen);
case 3:
return PrimitiveCreator.CreateInstanceOfInt16(rndGen);
case 4:
return PrimitiveCreator.CreateInstanceOfUInt16(rndGen);
case 5:
return PrimitiveCreator.CreateInstanceOfInt32(rndGen);
case 6:
return PrimitiveCreator.CreateInstanceOfUInt32(rndGen);
case 7:
return PrimitiveCreator.CreateInstanceOfInt64(rndGen);
case 8:
return PrimitiveCreator.CreateInstanceOfUInt64(rndGen);
case 9:
return PrimitiveCreator.CreateInstanceOfDecimal(rndGen);
case 10:
return PrimitiveCreator.CreateInstanceOfDouble(rndGen);
case 11:
return PrimitiveCreator.CreateInstanceOfSingle(rndGen);
case 12:
return PrimitiveCreator.CreateInstanceOfDateTime(rndGen);
case 13:
return PrimitiveCreator.CreateInstanceOfDateTimeOffset(rndGen);
case 14:
case 15:
// TODO: 199532 fix uri comparer
return PrimitiveCreator.CreateInstanceOfString(rndGen);
default:
return PrimitiveCreator.CreateInstanceOfBoolean(rndGen);
}
}
static JArray CreateJArray(Random rndGen, int depth)
{
int size = rndGen.Next(CreatorSettings.MaxArrayLength);
if (CreatorSettings.NullValueProbability == 0 && size == 0)
{
size++;
}
JArray result = new JArray();
for (int i = 0; i < size; i++)
{
result.Add(CreateJToken(rndGen, depth + 1));
}
return result;
}
static JObject CreateJObject(Random rndGen, int depth)
{
const string keyChars = "abcdefghijklmnopqrstuvwxyz0123456789";
int size = rndGen.Next(CreatorSettings.MaxArrayLength);
if (CreatorSettings.NullValueProbability == 0 && size == 0)
{
size++;
}
JObject result = new JObject();
for (int i = 0; i < size; i++)
{
string key;
do
{
key = PrimitiveCreator.CreateInstanceOfString(rndGen, 10, keyChars);
} while (result.Count > 0 && ((IDictionary<string, JToken>)result).ContainsKey(key));
result.Add(key, CreateJToken(rndGen, depth + 1));
}
return result;
}
}
}
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