protected virtual void Initialize(object component,
IEnumerable <KeyValuePair <string, object> > values,
IServiceProvider serviceProvider = null)
{
if (component == null)
{
throw new ArgumentNullException(nameof(component));
}
if (values == null)
{
return;
}
serviceProvider = serviceProvider ?? ServiceProvider.Null;
var exceptionHandler = serviceProvider.GetServiceOrDefault(
Activation.IgnoreErrors
);
var props = Template.GetPropertyCache(component);
foreach (var kvp in values.Distinct(KeyComparer))
{
PropertyInfo pd = props.GetValueOrDefault(kvp.Key);
if (pd == null)
{
exceptionHandler(null, RuntimeFailure.PropertyMissing(kvp.Key));
continue;
}
if (pd.SetMethod == null || !pd.SetMethod.IsPublic)
{
var dest = pd.GetValue(component);
Template.DefaultCopyContent(kvp.Value, dest);
continue;
}
object defaultValue = kvp.Value;
try {
// Conversion from string
var text = defaultValue as string;
if (text != null)
{
defaultValue = Activation.FromText(pd.PropertyType, text);
}
pd.SetValue(component, defaultValue);
} catch (Exception ex) {
exceptionHandler(null, ex);
}
}
}
private static bool StaticDefaultCoercion(PropertyInfo property, object value, Type requiredType, out object result)
{
if (value is string str)
{
try {
result = Activation.FromText(requiredType, str, null, null);
return(true);
} catch {
// Type conversion problem
}
}
result = null;
return(false);
}
protected override bool TryGetPropertyCore(string property, Type requiredType, out object value)
{
// Review the local storage to determine if it is contained
requiredType = requiredType ?? typeof(object);
if (InnerMap.TryGetValue(property, out value))
{
if (requiredType.GetTypeInfo().IsInstanceOfType(value) || value == null)
{
return(true);
}
// Type coercion
var str = value as string;
if (str != null)
{
value = Activation.FromText(requiredType, str, null, null);
return(true);
}
}
value = null;
return(base.TryGetPropertyCore(property, requiredType, out value));
}
public static object GetDefaultValue(this PropertyInfo property)
{
if (property == null)
{
throw new ArgumentNullException(nameof(property));
}
var data = property.CustomAttributes.FirstOrDefault(t => t.AttributeType == typeof(DefaultValueAttribute));
if (data != null && data.ConstructorArguments.Count == 2)
{
// Do a parse to extract the value
return(Activation.FromText((Type)data.ConstructorArguments[0].Value,
(string)data.ConstructorArguments[1].Value));
}
var attr = property.GetCustomAttribute <DefaultValueAttribute>();
if (attr == null)
{
return(property.PropertyType.GetDefaultValue());
}
return(attr.Value);
}
