PropertyInfo propertyInfo2; //fieldof(DPCollection<RoleDpo>) or fieldof(xxxDpo)
#endregion Fields
#region Constructors
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);
}
}
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);
}
}
}
