/// <summary>
/// Create Empty System.Data.DataTable from ColumnAttribute of DPO fields
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
private static DataTable GetEmptyDataTable(Type type)
{
DataTable dt = new DataTable();
foreach (PropertyInfo propertyInfo in Reflex.GetColumnProperties(type))
{
ColumnAttribute a = Reflex.GetColumnAttribute(propertyInfo);
if (a == null)
{
continue;
}
Type ty = propertyInfo.PropertyType.InnullableType();
DataColumn column = new DataColumn(a.ColumnName, ty);
column.AllowDBNull = a.Nullable;
column.AutoIncrement = a.Identity;
column.Caption = a.Caption;
//may need complicated logic for differentg type
if (ty == typeof(string))
{
column.MaxLength = a.Length;
}
dt.Columns.Add(column);
}
return(dt);
}
private RowObjectAdapter Bind(Selector columnNames)
{
foreach (PropertyInfo propertyInfo in Reflex.GetColumnProperties(obj))
{
ColumnAttribute attribute = Reflex.GetColumnAttribute(propertyInfo);
if (attribute != null && this.Row.Table.Columns.Contains(attribute.ColumnNameSaved))
{
DataField field = this.fields.Add(attribute.ColumnNameSaved, attribute.Type);
ColumnAdapter column = new ColumnAdapter(field);
this.Bind(column);
column.Field.Identity = attribute.Identity;
column.Field.Primary = attribute.Primary;
if (attribute.Identity || attribute.Computed || !columnNames.Exists(attribute.ColumnNameSaved))
{
column.Field.Saved = false;
}
else
{
column.Field.Saved = attribute.Saved;
}
}
}
//in case of ColumnAttribute not setup Identity and Primary Keys
fields.UpdatePrimaryIdentity(obj.Primary, obj.Identity);
return(this);
}
public static object FillField(object instance, PropertyInfo propertyInfo, DataRow dataRow, bool defaultValueUsed)
{
ColumnAttribute a = Reflex.GetColumnAttribute(dataRow, propertyInfo);
if (a != null)
{
object value = dataRow[a.ColumnName];
if (value == System.DBNull.Value)
{
if (a.DefaultValue != null)
{
value = a.DefaultValue;
}
else if (defaultValueUsed)
{
Type dataType = dataRow.Table.Columns[a.ColumnName].DataType;
value = DefaultRowValue.SystemDefaultValue(dataType);
}
else
{
value = null;
}
}
propertyInfo.SetValue(instance, value, null);
}
return(a);
}
public static void FillInstance(object instance, DataRow dataRow, bool defaultValueUsed)
{
foreach (PropertyInfo propertyInfo in Reflex.GetColumnProperties(instance))
{
FillField(instance, propertyInfo, dataRow, defaultValueUsed);
}
}
/// <summary>
/// Fill object properties
/// </summary>
/// <param name="dataRow"></param>
public virtual void FillObject(DataRow dataRow)
{
foreach (PropertyInfo propertyInfo in this.columnProperties)
{
if (Reflex.FillField(this, propertyInfo, dataRow, dataTableAttribute.DefaultValueUsed) == null)
{
Mapping mapping = new Mapping(this, propertyInfo);
mapping.SetValue();
}
}
}
private bool insertIdentityOn = false; //used for re-create table data during SQL Server updating
protected PersistentObject()
{
Type type = this.GetType();
TableAttribute[] attributes = GetAttributes <TableAttribute>();
if (attributes.Length > 0)
{
dataTableAttribute = attributes[0];
}
else
{
dataTableAttribute = new TableAttribute(type.Name, Level.Application);
}
this.columnProperties = Reflex.GetColumnProperties(type);
}
public PersistentCollection()
{
DataTable dataTable;
if (TableName.Exists())
{
dataTable = new SqlCmd(ConnectionProviderManager.DefaultProvider, $"SELECT TOP 1 * FROM {TableName}").FillDataTable();
dataTable.TableName = TableName.Name;
dataTable.Clear();
}
else
{
dataTable = Reflex.GetEmptyDataTable <T>();
}
this.Table = dataTable;
}
/// <summary>
/// Collect property values and save to DataRow
/// </summary>
/// <param name="dataRow"></param>
public virtual void UpdateRow(DataRow dataRow)
{
foreach (PropertyInfo propertyInfo in Reflex.GetColumnProperties(this))
{
ColumnAttribute attribute = Reflex.GetColumnAttribute(dataRow, propertyInfo);
if (attribute != null && dataRow.Table.Columns.Contains(attribute.ColumnNameSaved))
{
if (propertyInfo.GetValue(this, null) == null)
{
dataRow[attribute.ColumnNameSaved] = System.DBNull.Value;
}
else
{
dataRow[attribute.ColumnNameSaved] = propertyInfo.GetValue(this, null);
}
}
}
}
public void Apply()
{
foreach (PropertyInfo propertyInfo in Reflex.GetColumnProperties(obj))
{
ColumnAttribute a = Reflex.GetColumnAttribute(propertyInfo);
if (a != null && this.Row.Table.Columns.Contains(a.ColumnNameSaved))
{
if (propertyInfo.GetValue(obj, null) == null)
{
this.Row[a.ColumnNameSaved] = System.DBNull.Value;
}
else
{
this.Row[a.ColumnNameSaved] = propertyInfo.GetValue(obj, null);
}
}
}
this.Fill();
}
private void Apply(RowAdapter d)
{
foreach (PropertyInfo propertyInfo in this.columnProperties)
{
ColumnAttribute a = Reflex.GetColumnAttribute(propertyInfo);
if (a != null && d.Row.Table.Columns.Contains(a.ColumnNameSaved))
{
if (propertyInfo.GetValue(this, null) == null)
{
d.Row[a.ColumnNameSaved] = System.DBNull.Value;
}
else
{
d.Row[a.ColumnNameSaved] = propertyInfo.GetValue(this, null);
}
}
}
d.Fill();
}
public virtual bool Delete()
{
RowObjectAdapter d = new RowObjectAdapter(this);
d.Apply();
//check 1..many table dependency
foreach (PropertyInfo propertyInfo in this.columnProperties)
{
AssociationAttribute association = Reflex.GetAssociationAttribute(propertyInfo);
if (association == null)
{
continue;
}
if (!propertyInfo.PropertyType.IsGenericType)
{
continue;
}
IDPCollection collection = (IDPCollection)propertyInfo.GetValue(this, null);
if (collection.Count == 0)
{
continue;
}
Type[] typeParameters = propertyInfo.PropertyType.GetGenericArguments();
if (typeParameters.Length == 1 && typeParameters[0].IsSubclassOf(typeof(PersistentObject)))
{
throw new ApplicationException(string.Format(
"Error: data persistent object on Table {0} cannot be deleted because Table {1} depends on it.",
TableName,
collection.TableName));
}
}
d.RowChanged += RowChanged;
return(d.Delete());
}
private SqlBuilder clause2; //B := SELECT * FROM Roles WHERE Roles.Role_ID IN (A)
public Mapping(PersistentObject dpo, PropertyInfo propertyInfo2)
{
this.association = Reflex.GetAssociationAttribute(propertyInfo2);
if (association == null)
{
return;
}
this.dpoInstance = dpo;
this.propertyInfo2 = propertyInfo2;
Type dpoType2; //typeof(RoleDpo)
if (propertyInfo2.PropertyType.IsGenericType)
{
dpoType2 = PersistentObject.GetCollectionGenericType(propertyInfo2);
if (this.association.TRelation == null)
{
mappingType = MappingType.One2Many;
}
else
{
mappingType = MappingType.Many2Many;
}
}
else
{
dpoType2 = propertyInfo2.PropertyType;
mappingType = MappingType.One2One;
}
this.propertyInfo1 = dpo.GetType().GetProperty(association.Column1);
if (mappingType == MappingType.Many2Many)
{
this.clause1 = new SqlBuilder()
.SELECT().COLUMNS(association.Relation2)
.FROM(association.TRelation)
.WHERE(association.Relation1.ColumnName() == association.Column1.ParameterName());
this.clause2 = new SqlBuilder()
.SELECT()
.COLUMNS()
.FROM(dpoType2)
.WHERE(association.Relation2.ColumnName().IN(this.clause1));
}
else
{
SqlExpr where = association.Column2.ColumnName() == association.Column1.ParameterName();
if (association.Filter != null)
{
where = where.AND(association.Filter);
}
this.clause2 = new SqlBuilder()
.SELECT()
.COLUMNS()
.FROM(dpoType2)
.WHERE(where);
if (association.OrderBy != null)
{
this.clause2 = clause2.ORDER_BY(association.OrderBy);
}
}
}
