/// <summary>
/// Gets the sample object that will be serialized by the formatters.
/// First, it will look at the <see cref="SampleObjects"/>. If no sample object is found, it will try to create one using <see cref="ObjectGenerator"/>.
/// </summary>
/// <param name="type">The type.</param>
/// <returns>The sample object.</returns>
public virtual object GetSampleObject(Type type)
{
object sampleObject;
if (!SampleObjects.TryGetValue(type, out sampleObject))
{
// Try create a default sample object
ObjectGenerator objectGenerator = new ObjectGenerator();
sampleObject = objectGenerator.GenerateObject(type);
}
return sampleObject;
}
private static void SetPublicProperties(Type type, object obj, Dictionary<Type, object> createdObjectReferences)
{
PropertyInfo[] properties = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
ObjectGenerator objectGenerator = new ObjectGenerator();
foreach (PropertyInfo property in properties)
{
if (property.CanWrite)
{
object propertyValue = objectGenerator.GenerateObject(property.PropertyType, createdObjectReferences);
property.SetValue(obj, propertyValue, null);
}
}
}
private static void SetPublicFields(Type type, object obj, Dictionary<Type, object> createdObjectReferences)
{
FieldInfo[] fields = type.GetFields(BindingFlags.Public | BindingFlags.Instance);
ObjectGenerator objectGenerator = new ObjectGenerator();
foreach (FieldInfo field in fields)
{
object fieldValue = objectGenerator.GenerateObject(field.FieldType, createdObjectReferences);
field.SetValue(obj, fieldValue);
}
}
private static object GenerateCollection(Type collectionType, int size, Dictionary<Type, object> createdObjectReferences)
{
Type type = collectionType.IsGenericType ?
collectionType.GetGenericArguments()[0] :
typeof(object);
object result = Activator.CreateInstance(collectionType);
MethodInfo addMethod = collectionType.GetMethod("Add");
bool areAllElementsNull = true;
ObjectGenerator objectGenerator = new ObjectGenerator();
for (int i = 0; i < size; i++)
{
object element = objectGenerator.GenerateObject(type, createdObjectReferences);
addMethod.Invoke(result, new object[] { element });
areAllElementsNull &= element == null;
}
if (areAllElementsNull)
{
return null;
}
return result;
}
private static object GenerateNullable(Type nullableType, Dictionary<Type, object> createdObjectReferences)
{
Type type = nullableType.GetGenericArguments()[0];
ObjectGenerator objectGenerator = new ObjectGenerator();
return objectGenerator.GenerateObject(type, createdObjectReferences);
}
private static object GenerateDictionary(Type dictionaryType, int size, Dictionary<Type, object> createdObjectReferences)
{
Type typeK = typeof(object);
Type typeV = typeof(object);
if (dictionaryType.IsGenericType)
{
Type[] genericArgs = dictionaryType.GetGenericArguments();
typeK = genericArgs[0];
typeV = genericArgs[1];
}
object result = Activator.CreateInstance(dictionaryType);
MethodInfo addMethod = dictionaryType.GetMethod("Add") ?? dictionaryType.GetMethod("TryAdd");
MethodInfo containsMethod = dictionaryType.GetMethod("Contains") ?? dictionaryType.GetMethod("ContainsKey");
ObjectGenerator objectGenerator = new ObjectGenerator();
for (int i = 0; i < size; i++)
{
object newKey = objectGenerator.GenerateObject(typeK, createdObjectReferences);
if (newKey == null)
{
// Cannot generate a valid key
return null;
}
bool containsKey = (bool)containsMethod.Invoke(result, new object[] { newKey });
if (!containsKey)
{
object newValue = objectGenerator.GenerateObject(typeV, createdObjectReferences);
addMethod.Invoke(result, new object[] { newKey, newValue });
}
}
return result;
}
private static object GenerateArray(Type arrayType, int size, Dictionary<Type, object> createdObjectReferences)
{
Type type = arrayType.GetElementType();
Array result = Array.CreateInstance(type, size);
bool areAllElementsNull = true;
ObjectGenerator objectGenerator = new ObjectGenerator();
for (int i = 0; i < size; i++)
{
object element = objectGenerator.GenerateObject(type, createdObjectReferences);
result.SetValue(element, i);
areAllElementsNull &= element == null;
}
if (areAllElementsNull)
{
return null;
}
return result;
}
private static object GenerateKeyValuePair(Type keyValuePairType, Dictionary<Type, object> createdObjectReferences)
{
Type[] genericArgs = keyValuePairType.GetGenericArguments();
Type typeK = genericArgs[0];
Type typeV = genericArgs[1];
ObjectGenerator objectGenerator = new ObjectGenerator();
object keyObject = objectGenerator.GenerateObject(typeK, createdObjectReferences);
object valueObject = objectGenerator.GenerateObject(typeV, createdObjectReferences);
if (keyObject == null && valueObject == null)
{
// Failed to create key and values
return null;
}
object result = Activator.CreateInstance(keyValuePairType, keyObject, valueObject);
return result;
}
private static object GenerateTuple(Type type, Dictionary<Type, object> createdObjectReferences)
{
Type[] genericArgs = type.GetGenericArguments();
object[] parameterValues = new object[genericArgs.Length];
bool failedToCreateTuple = true;
ObjectGenerator objectGenerator = new ObjectGenerator();
for (int i = 0; i < genericArgs.Length; i++)
{
parameterValues[i] = objectGenerator.GenerateObject(genericArgs[i], createdObjectReferences);
failedToCreateTuple &= parameterValues[i] == null;
}
if (failedToCreateTuple)
{
return null;
}
object result = Activator.CreateInstance(type, parameterValues);
return result;
}
// Default factory for sample objects
private static object DefaultSampleObjectFactory(HelpPageSampleGenerator sampleGenerator, Type type)
{
// Try to create a default sample object
ObjectGenerator objectGenerator = new ObjectGenerator();
return objectGenerator.GenerateObject(type);
}