/// <summary>
/// Initializes a new <see cref="AbstractTypeResolver"/>
/// </summary>
/// <param name="abstractType">The abstract type to resolve the implementation type for</param>
public AbstractTypeResolver(Type abstractType)
{
DiscriminatorAttribute discriminatorAttribute = abstractType.GetCustomAttribute <DiscriminatorAttribute>();
if (discriminatorAttribute == null)
{
throw new NullReferenceException($"Failed to find the required '{nameof(DiscriminatorAttribute)}'");
}
this.DiscriminatorProperty = abstractType.GetProperty(discriminatorAttribute.Property, BindingFlags.Default | BindingFlags.Public | BindingFlags.Instance);
if (this.DiscriminatorProperty == null)
{
throw new NullReferenceException($"Failed to find the specified discriminator property '{discriminatorAttribute.Property}' in type '{abstractType.Name}'");
}
this.TypeMappings = new Dictionary <string, Type>();
foreach (Type derivedType in typeof(StateType).Assembly.GetTypes()
.Where(t => t.IsClass && !t.IsAbstract && t.BaseType == abstractType))
{
DiscriminatorValueAttribute discriminatorValueAttribute = derivedType.GetCustomAttribute <DiscriminatorValueAttribute>();
if (discriminatorValueAttribute == null)
{
continue;
}
string discriminatorValue = null;
if (discriminatorValueAttribute.Value.GetType().IsEnum)
{
discriminatorValue = EnumHelper.Stringify(discriminatorValueAttribute.Value, this.DiscriminatorProperty.PropertyType);
}
else
{
discriminatorValue = discriminatorValueAttribute.Value.ToString();
}
this.TypeMappings.Add(discriminatorValue.ToLower(), derivedType);
}
}
public DiscriminatorModelBinder(
IModelBinderFactory factory,
IModelMetadataProvider metadataProvider,
DiscriminatorAttribute discriminator,
IList <DiscriminatorCaseAttribute> cases,
IDiscriminatorReader reader
)
{
_factory = factory;
_metadataProvider = metadataProvider;
_discriminator = discriminator;
_cases = cases;
_reader = reader;
}
/// <summary> Write a Discriminator XML Element from attributes in a member. </summary>
public virtual void WriteDiscriminator(System.Xml.XmlWriter writer, System.Reflection.MemberInfo member, DiscriminatorAttribute attribute, BaseAttribute parentAttribute, System.Type mappedClass)
{
writer.WriteStartElement( "discriminator" );
// Attribute: <column>
if(attribute.Column != null)
writer.WriteAttributeString("column", GetAttributeValue(attribute.Column, mappedClass));
// Attribute: <formula>
if(attribute.Formula != null)
writer.WriteAttributeString("formula", GetAttributeValue(attribute.Formula, mappedClass));
// Attribute: <type>
if(attribute.Type != null)
writer.WriteAttributeString("type", GetAttributeValue(attribute.Type, mappedClass));
// Attribute: <not-null>
if( attribute.NotNullSpecified )
writer.WriteAttributeString("not-null", attribute.NotNull ? "true" : "false");
// Attribute: <length>
if(attribute.Length != -1)
writer.WriteAttributeString("length", attribute.Length.ToString());
// Attribute: <force>
if( attribute.ForceSpecified )
writer.WriteAttributeString("force", attribute.Force ? "true" : "false");
// Attribute: <insert>
if( attribute.InsertSpecified )
writer.WriteAttributeString("insert", attribute.Insert ? "true" : "false");
WriteUserDefinedContent(writer, member, null, attribute);
System.Collections.ArrayList memberAttribs = GetSortedAttributes(member);
int attribPos; // Find the position of the DiscriminatorAttribute (its <sub-element>s must be after it)
for(attribPos=0; attribPos<memberAttribs.Count; attribPos++)
if( memberAttribs[attribPos] is DiscriminatorAttribute
&& ((BaseAttribute)memberAttribs[attribPos]).Position == attribute.Position )
break; // found
int i = attribPos + 1;
// Element: <column>
for(; i<memberAttribs.Count; i++)
{
BaseAttribute memberAttrib = memberAttribs[i] as BaseAttribute;
if( IsNextElement(memberAttrib, parentAttribute, attribute.GetType())
|| IsNextElement(memberAttrib, attribute, typeof(ColumnAttribute)) )
break; // next attributes are 'elements' of the same level OR for 'sub-elements'
else
{
if( memberAttrib is DiscriminatorAttribute )
break; // Following attributes are for this Discriminator
if( memberAttrib is ColumnAttribute )
WriteColumn(writer, member, memberAttrib as ColumnAttribute, attribute, mappedClass);
}
}
WriteUserDefinedContent(writer, member, typeof(ColumnAttribute), attribute);
// Element: <formula>
for(; i<memberAttribs.Count; i++)
{
BaseAttribute memberAttrib = memberAttribs[i] as BaseAttribute;
if( IsNextElement(memberAttrib, parentAttribute, attribute.GetType())
|| IsNextElement(memberAttrib, attribute, typeof(FormulaAttribute)) )
break; // next attributes are 'elements' of the same level OR for 'sub-elements'
else
{
if( memberAttrib is DiscriminatorAttribute )
break; // Following attributes are for this Discriminator
if( memberAttrib is FormulaAttribute )
WriteFormula(writer, member, memberAttrib as FormulaAttribute, attribute, mappedClass);
}
}
WriteUserDefinedContent(writer, member, typeof(FormulaAttribute), attribute);
writer.WriteEndElement();
}
