public void AddChild(DataSchemaKey key)
{
Contract.Requires(key != null);
key.Parent = this;
Childs.Add(key);
}
private static void FindIterators(DataSchemaKey k, Dictionary<DataSchemaIterator,int> i)
{
if (k.Parent != null)
{
if (k.Parent.Type == DataSchemaKeyType.Iterator)
i.Add((DataSchemaIterator)k.Parent, 0);
FindIterators(k.Parent, i);
}
}
private static void ParseNodeInternal(XElement element, DataSchemaKey key)
{
foreach (XElement el in element.Elements())
{
string name = el.Attribute("name").Value;
switch (el.Name.LocalName)
{
case "value" :
string mappedColumn = el.Value;
DataSchemaValue v = new DataSchemaValue(name, mappedColumn);
ParseNodeInternal(el, v);
key.AddChild(v);
break;
case "container" :
DataSchemaKey c = new DataSchemaKey(DataSchemaKeyType.Container, name);
ParseNodeInternal(el, c);
key.AddChild(c);
break;
case "iterator" :
int max = Int32.Parse(el.Attribute("maxItemCount").Value);
DataSchemaIterator i = new DataSchemaIterator(name, max);
ParseNodeInternal(el, i);
key.AddChild(i);
break;
case "iteratorValue" :
Dictionary<DataSchemaIterator,int> iterators = new Dictionary<DataSchemaIterator,int>();
FindIterators(key, iterators);
iterators.Reverse();
List<DataSchemaIteratorValueMappedColumn> columns = new List<DataSchemaIteratorValueMappedColumn>();
string tmpl = el.Value;
GenCoulumns(tmpl, iterators, columns, 0);
DataSchemaIteratorValue iv = new DataSchemaIteratorValue(name, columns);
ParseNodeInternal(el, iv);
key.AddChild(iv);
break;
}
}
}
private object MapDataInternal(Dictionary<string, object> row, DataSchemaKey key, Type type, Dictionary<DataSchemaIterator, int> interatorsIndexes)
{
Contract.Requires(type != null);
object generetedObject = Activator.CreateInstance(type);
var p = type.GetProperties();
foreach (DataSchemaKey childKey in key.Childs)
{
PropertyInfo property = type.GetProperty("_" + childKey.Name);
object value = new object();
switch (childKey.Type)
{
case DataSchemaKeyType.Container:
value = MapDataInternal(row, childKey, property.PropertyType, interatorsIndexes);
break;
case DataSchemaKeyType.Value:
DataSchemaValue v = (DataSchemaValue)childKey;
value = row[v.MappedColumn];
break;
case DataSchemaKeyType.Iterator:
DataSchemaIterator iterator = (DataSchemaIterator)childKey;
interatorsIndexes.Add(iterator, 0);
Array array = Array.CreateInstance(property.PropertyType.GetElementType(), iterator.MaxItemCount);
for (int i = 0; i < iterator.MaxItemCount; i++)
{
interatorsIndexes[iterator] = i;
object arrayValue = MapDataInternal(row, childKey, property.PropertyType.GetElementType(), interatorsIndexes);
array.SetValue(arrayValue, i);
}
value = array;
break;
case DataSchemaKeyType.IteratedValue:
DataSchemaIteratorValue va = (DataSchemaIteratorValue)childKey;
foreach (DataSchemaIteratorValueMappedColumn mc in va.MappedColumns)
{
bool match = true;
foreach (KeyValuePair<DataSchemaIterator, int> index in mc.IteratorIndexes)
{
if (!interatorsIndexes.Contains(index))
{
match = false;
break;
}
}
if (match)
{
value = row[mc.ColumnName];
break;
}
}
break;
}
property.SetValue(generetedObject, value, null);
}
return generetedObject;
}
public DataSchema()
{
Root = new DataSchemaKey(DataSchemaKeyType.Container, "Model");
}
private Type ResolveTypeInternal(DataSchemaKey key, EmitHelper emit, IEnumerable<DataSourceBase.DataColumn> columns)
{
Dictionary<string, Type> properties = new Dictionary<string, Type>();
foreach (DataSchemaKey k in key.Childs)
{
switch (k.Type)
{
case DataSchemaKeyType.Container:
IEnumerable<DataSchemaKey> ikeys = k.Childs.Where(c => c.Type == DataSchemaKeyType.IteratedValue);
List<DataSchemaIteratorValue> ivalues = new List<DataSchemaIteratorValue>();
foreach (DataSchemaKey c in ikeys)
{
try
{
DataSchemaIteratorValue value = (DataSchemaIteratorValue)c;
ivalues.Add(value);
}
catch (InvalidCastException)
{
throw new InvalidDataSchemaException("Invalid DataSchemaKey type for " + c.Name + ", must be DataSchemaIteratorValue.", c);
}
}
if (ivalues.Select(c => c.MappedColumns.Count).Distinct().Count() > 1)
throw new InvalidDataSchemaException("All DataSchemaIteratorValue of " + k.Name + " must have the same count of MappedColumn", k);
properties.Add(k.Name, ResolveTypeInternal(k, emit, columns));
break;
case DataSchemaKeyType.Value:
try
{
DataSchemaValue value = (DataSchemaValue)k;
try
{
DataSourceBase.DataColumn col = columns.Where(c => c.Name == value.MappedColumn).First();
properties.Add(k.Name, col.DataType);
}
catch
{
throw new InvalidDataSchemaException("DataColumn " + value.MappedColumn + " was not present in the provided column collection.", value);
}
}
catch (InvalidCastException)
{
throw new InvalidDataSchemaException("Invalid DataSchemaKey type for " + k.Name + ", must be DataSchemeValue.", k);
}
break;
case DataSchemaKeyType.Iterator:
Type t = ResolveTypeInternal(k, emit, columns);
properties.Add(k.Name, t.MakeArrayType());
break;
case DataSchemaKeyType.IteratedValue:
try
{
DataSchemaIteratorValue value = (DataSchemaIteratorValue)k;
foreach (DataSchemaIteratorValueMappedColumn mc in value.MappedColumns)
if (columns.Where(c => c.Name == mc.ColumnName).Count() == 0)
throw new InvalidDataSchemaException("DataColumn " + mc.ColumnName + " was not present in the provided column collection.", value);
IEnumerable<Type> columnsTypes = columns
.Where(c => value.MappedColumns.Select(mc => mc.ColumnName)
.Contains(c.Name))
.Select(c => c.DataType)
.Distinct();
if (columnsTypes.Count() > 1)
throw new InvalidDataSchemaException("All mapped columns of " + k.Name + " must have the same datatype.", k);
properties.Add(k.Name, columnsTypes.First());
}
catch (InvalidCastException)
{
throw new InvalidDataSchemaException("Invalid DataSchemaKey type for " + k.Name + ", must be DataSchemaIteratorValue.", k);
}
break;
}
}
Type returnType = emit.CreateType(key.Path, properties);
//Contract.Ensures(returnType != null);
return returnType;
}
public InvalidDataSchemaException(string message, DataSchemaKey key)
: base(message)
{
Key = key;
}