public Model Load(Stream stream)
{
var entityMaps = new List<IEntityMap>();
var xmlReader = XmlDictionaryReader.CreateTextReader(stream, Encoding.UTF8, XmlDictionaryReaderQuotas.Max, null);
if (!xmlReader.ReadToFollowing("Model"))
throw new ArgumentException("Missing required element Model");
var visitor = new XmlVisitor(xmlReader);
while (visitor.VisitNext())
{
if (visitor.NodeType != XmlNodeType.Element) continue;
if (visitor.Name != "Entities")
throw new ArgumentException("Unexpected xml element " + visitor.Name);
if (!visitor.IsEmptyElement)
ReadEntityMaps(visitor, entityMaps);
}
return new Model(entityMaps);
}
private void ReadPropertyMaps(XmlVisitor visitor, Type entityType, List<IPropertyMap> properties)
{
while (visitor.VisitNext())
{
if (visitor.NodeType == XmlNodeType.EndElement && visitor.Name == "Properties")
return;
if (visitor.NodeType != XmlNodeType.Element) continue;
if (visitor.Name == "Property")
properties.Add(ReadPropertyMap(visitor, entityType));
else
throw new ArgumentException("Unexpected xml element " + visitor.Name);
}
}
private IPropertyMap ReadPropertyMap(XmlVisitor visitor, Type entityType)
{
string name = null;
string propertyName = null;
int index = -1;
while (visitor.VisitNext())
{
if (visitor.NodeType == XmlNodeType.EndElement && visitor.Name == "Property")
{
if (string.IsNullOrEmpty(name)) throw new ArgumentException("Missing required element Property/Name");
if (index < 0) throw new ArgumentException("Missing required element Property/Index");
if (string.IsNullOrEmpty(propertyName)) propertyName = name;
var propertyMap = PropertyMap.Create(entityType, propertyName);
propertyMap.Name = name;
propertyMap.Index = index;
return propertyMap;
}
if (visitor.NodeType != XmlNodeType.Element) continue;
if (visitor.Name == "Name")
name = visitor.GetElementContentAsString();
else if (visitor.Name == "UniqueName")
propertyName = visitor.GetElementContentAsString();
else if (visitor.Name == "Index")
index = visitor.GetElementContentAsInt32();
else
throw new ArgumentException("Unexpected xml element " + visitor.Name);
}
throw new ArgumentException("Unexpected end of stream");
}
private void ReadIndexes(XmlVisitor visitor, Type entityType, List<IIndex> indexes)
{
while (visitor.VisitNext())
{
if (visitor.NodeType == XmlNodeType.EndElement && visitor.Name == "Indexes")
return;
if (visitor.NodeType != XmlNodeType.Element) continue;
if (visitor.Name == "Index")
indexes.Add(ReadIndex(visitor, entityType));
else
throw new ArgumentException("Unexpected xml element " + visitor.Name);
}
}
private IIndex ReadIndex(XmlVisitor visitor, Type entityType)
{
string uniqueName = null;
while (visitor.VisitNext())
{
if (visitor.NodeType == XmlNodeType.EndElement && visitor.Name == "Index")
{
if (string.IsNullOrEmpty(uniqueName)) throw new ArgumentException("Missing required element UniqueName");
return Index.Create(entityType, uniqueName);
}
if (visitor.NodeType != XmlNodeType.Element) continue;
// TODO: Backwardscompatiblitiy 0.2.0: PropertyName
if (string.Equals(visitor.Name, "PropertyName", StringComparison.InvariantCulture))
uniqueName = visitor.GetElementContentAsString();
else if (string.Equals(visitor.Name, "UniqueName", StringComparison.InvariantCulture))
uniqueName = visitor.GetElementContentAsString();
else
throw new ArgumentException("Unexpected xml element " + visitor.Name);
}
throw new ArgumentException("Unexpected end of stream");
}
private void ReadEntityMaps(XmlVisitor visitor, List<IEntityMap> entityMaps)
{
while (visitor.VisitNext())
{
if (visitor.NodeType == XmlNodeType.EndElement && visitor.Name == "Entities")
return;
if (visitor.NodeType != XmlNodeType.Element) continue;
if (visitor.Name == "Entity")
entityMaps.Add(ReadEntityMap(visitor));
else
throw new ArgumentException("Unexpected xml element " + visitor.Name);
}
}
private IEntityMap ReadEntityMap(XmlVisitor visitor)
{
Type entityType = null;
string entityName = null;
string keyName = null;
var propertyIndexLength = 0;
var properties = new List<IPropertyMap>();
var indexes = new List<IIndex>();
while (visitor.VisitNext())
{
if (visitor.NodeType == XmlNodeType.EndElement && visitor.Name == "Entity")
{
if (entityType == null) throw new ArgumentException("Missing entity type");
if (entityName == null) entityName = entityType.Name;
var entityMap = EntityMap.Create(entityType, properties, indexes);
entityMap.KeyName = keyName;
entityMap.PropertyIndexLength = propertyIndexLength;
return entityMap;
}
if (visitor.NodeType != XmlNodeType.Element) continue;
if (visitor.Name == "Type")
entityType = Type.GetType(visitor.GetElementContentAsString(), throwOnError: true);
else if (visitor.Name == "Name")
entityName = visitor.GetElementContentAsString();
else if (visitor.Name == "KeyName")
keyName = visitor.GetElementContentAsString();
else if (visitor.Name == "PropertyIndexLength")
propertyIndexLength = visitor.GetElementContentAsInt32();
else if (visitor.Name == "Properties")
{
if (!visitor.IsEmptyElement)
ReadPropertyMaps(visitor, entityType, properties);
}
else if (visitor.Name == "Indexes")
{
if (!visitor.IsEmptyElement)
ReadIndexes(visitor, entityType, indexes);
}
else
throw new ArgumentException("Unexpected xml element " + visitor.Name);
}
throw new ArgumentException("Unexpected end of stream");
}