/// <summary>
/// Populates the properties of an object from a map
/// </summary>
/// <param name="instance">the object to populate, the type must match the one that this instance was created for</param>
/// <param name="values">a dictionary of values</param>
/// <param name="ignoreMissingProperties">true to ignore any keys in the dictionary that are not properties on the object.
/// If false, an exception will be thrown if a property cannot be found.</param>
public void PopulateFromDictionary(object instance, IDictionary values, bool ignoreMissingProperties)
{
if (_handler.ForType.IsInstanceOfType(instance))
{
foreach (object key in values.Keys)
{
string stringKey = key.ToString();
IPropertyData prop = _handler.FindProperty(stringKey);
if (prop == null && !ignoreMissingProperties)
{
throw new MissingMemberException("Can't find a property for " + stringKey);
}
else if (prop != null)
{
prop.SetValue(instance, values[key]);
}
}
}
else
{
throw new ArgumentException("Object instance is of a different type than this class was constructed for");
}
}
protected virtual void EvaluateItem(object existingObject, IDeserializerHandler deserializer, ITypeData typeHandler, KeyValueExpression Item)
{
// evaluate the item and let it assign itself?
IPropertyData hndlr = typeHandler.FindPropertyByAlias(Item.Key);
if (hndlr == null)
{
switch (this.Settings.MissingPropertyAction)
{
case MissingPropertyOptions.Ignore:
return;
case MissingPropertyOptions.ThrowException:
throw new Exception(string.Format("Could not find property {0} for type {1}", Item.Key, typeHandler.ForType));
default:
throw new InvalidOperationException("Unhandled MissingPropertyAction: " + this.Settings.MissingPropertyAction);
}
}
if (hndlr.Ignored)
{
switch (Settings.IgnoredPropertyAction)
{
case IgnoredPropertyOption.Ignore:
return;
case IgnoredPropertyOption.SetIfPossible:
if (!hndlr.CanWrite)
{
return;
}
break;
case IgnoredPropertyOption.ThrowException:
throw new Exception(string.Format("Can not set property {0} for type {1} because it is ignored and IgnorePropertyAction is set to ThrowException", Item.Key, typeHandler.ForType));
}
}
Expression valueExpression = Item.ValueExpression;
valueExpression.ResultType = hndlr.PropertyType;
object result = null;
TypeConverterExpressionHandler converterHandler = null;
IJsonTypeConverter converter = null;
if (hndlr.HasConverter)
{
converterHandler = (TypeConverterExpressionHandler)Settings.ExpressionHandlers.Find(typeof(TypeConverterExpressionHandler));
converter = hndlr.TypeConverter;
}
if (!hndlr.CanWrite)
{
result = hndlr.GetValue(existingObject);
if (converterHandler != null)
{
converterHandler.Evaluate(valueExpression, result, deserializer, converter);
}
else
{
deserializer.Evaluate(valueExpression, result);
}
}
else
{
if (hndlr.HasConverter)
{
hndlr.SetValue(existingObject, converterHandler.Evaluate(valueExpression, deserializer, converter));
}
else
{
hndlr.SetValue(existingObject, deserializer.Evaluate(valueExpression));
}
}
}
/// <summary>
/// Evaluates the expression and populates an existing object with the expression's properties
/// </summary>
/// <param name="expression">json object expression</param>
/// <param name="existingObject">the existing object to populate</param>
/// <param name="deserializer">deserializer for deserializing key values</param>
/// <returns>deserialized object</returns>
public override object Evaluate(Expression expression, object existingObject, IDeserializerHandler deserializer)
{
TypeData typeHandler = Context.GetTypeHandler(existingObject.GetType());
ObjectExpression objectExpression = (ObjectExpression)expression;
foreach (KeyValueExpression Item in objectExpression.Properties)
{
// evaluate the item and let it assign itself?
IPropertyData hndlr = typeHandler.FindProperty(Item.Key);
if (hndlr == null)
{
throw new Exception(string.Format("Could not find property {0} for type {1}", Item.Key, typeHandler.ForType));
}
if (hndlr.Ignored)
{
switch (Context.IgnoredPropertyAction)
{
case SerializationContext.IgnoredPropertyOption.Ignore:
continue;
case SerializationContext.IgnoredPropertyOption.SetIfPossible:
if (!hndlr.CanWrite)
{
continue;
}
break;
case SerializationContext.IgnoredPropertyOption.ThrowException:
throw new Exception(string.Format("Can not set property {0} for type {1} because it is ignored and IgnorePropertyAction is set to ThrowException", Item.Key, typeHandler.ForType));
}
}
Expression valueExpression = Item.ValueExpression;
valueExpression.ResultType = hndlr.PropertyType;
object result = null;
TypeConverterExpressionHandler converterHandler = null;
IJsonTypeConverter converter = null;
if (hndlr.HasConverter)
{
converterHandler = (TypeConverterExpressionHandler)Context.ExpressionHandlers.Find(typeof(TypeConverterExpressionHandler));
converter = hndlr.TypeConverter;
}
if (!hndlr.CanWrite)
{
result = hndlr.GetValue(existingObject);
if (converterHandler != null)
{
converterHandler.Evaluate(valueExpression, result, deserializer, converter);
}
else
{
deserializer.Evaluate(valueExpression, result);
}
}
else
{
if (hndlr.HasConverter)
{
hndlr.SetValue(existingObject, converterHandler.Evaluate(valueExpression, deserializer, converter));
}
else
{
hndlr.SetValue(existingObject, deserializer.Evaluate(valueExpression));
}
}
}
return(existingObject);
}
