public override int Delete <TEntity>(TEntity entity, string table)
{
PublicHelper.CheckNull(entity);
TypeDescriptor typeDescriptor = EntityTypeContainer.GetDescriptor(typeof(TEntity));
PublicHelper.EnsureHasPrimaryKey(typeDescriptor);
Dictionary <PropertyDescriptor, object> keyValueMap = new Dictionary <PropertyDescriptor, object>(typeDescriptor.PrimaryKeys.Count);
foreach (PropertyDescriptor keyPropertyDescriptor in typeDescriptor.PrimaryKeys)
{
object keyVal = keyPropertyDescriptor.GetValue(entity);
keyValueMap.Add(keyPropertyDescriptor, keyVal);
}
DbTable dbTable = table == null ? typeDescriptor.Table : new DbTable(table, typeDescriptor.Table.Schema);
PropertyDescriptor timestampProperty = typeDescriptor.PropertyDescriptors.Where(a => a.IsTimestamp()).FirstOrDefault();
if (timestampProperty != null)
{
object timestampValue = timestampProperty.GetValue(entity);
if (timestampValue != null)
{
keyValueMap[timestampProperty] = timestampValue;
}
}
DbExpression conditionExp = PrimaryKeyHelper.MakeCondition(keyValueMap, dbTable);
DbDeleteExpression e = new DbDeleteExpression(dbTable, conditionExp);
return(this.ExecuteNonQuery(e));
}
public override int Update <TEntity>(TEntity entity, string table)
{
PublicHelper.CheckNull(entity);
TypeDescriptor typeDescriptor = EntityTypeContainer.GetDescriptor(typeof(TEntity));
PublicHelper.EnsureHasPrimaryKey(typeDescriptor);
Dictionary <PropertyDescriptor, object> keyValueMap = PrimaryKeyHelper.CreateKeyValueMap(typeDescriptor);
IEntityState entityState = this.TryGetTrackedEntityState(entity);
Dictionary <PropertyDescriptor, DbExpression> updateColumns = new Dictionary <PropertyDescriptor, DbExpression>();
foreach (PropertyDescriptor propertyDescriptor in typeDescriptor.PropertyDescriptors)
{
if (keyValueMap.ContainsKey(propertyDescriptor))
{
keyValueMap[propertyDescriptor] = propertyDescriptor.GetValue(entity);
continue;
}
bool hasSequence = propertyDescriptor.HasSequence();
if (hasSequence)
{
continue;
}
object val = propertyDescriptor.GetValue(entity);
if (entityState != null && !entityState.HasChanged(propertyDescriptor, val))
{
continue;
}
DbExpression valExp = DbExpression.Parameter(val, propertyDescriptor.PropertyType, propertyDescriptor.Column.DbType);
updateColumns.Add(propertyDescriptor, valExp);
}
if (updateColumns.Count == 0)
{
return(0);
}
DbTable dbTable = table == null ? typeDescriptor.Table : new DbTable(table, typeDescriptor.Table.Schema);
DbExpression conditionExp = PrimaryKeyHelper.MakeCondition(keyValueMap, dbTable);
DbUpdateExpression e = new DbUpdateExpression(dbTable, conditionExp);
foreach (var item in updateColumns)
{
e.UpdateColumns.Add(item.Key.Column, item.Value);
}
int ret = this.ExecuteNonQuery(e);
if (entityState != null)
{
entityState.Refresh();
}
return(ret);
}
public virtual int Delete <TEntity>(TEntity entity, string table)
{
PublicHelper.CheckNull(entity);
TypeDescriptor typeDescriptor = EntityTypeContainer.GetDescriptor(typeof(TEntity));
PublicHelper.EnsureHasPrimaryKey(typeDescriptor);
Dictionary <PropertyDescriptor, object> keyValueMap = new Dictionary <PropertyDescriptor, object>(typeDescriptor.PrimaryKeys.Count);
foreach (PropertyDescriptor keyPropertyDescriptor in typeDescriptor.PrimaryKeys)
{
object keyVal = keyPropertyDescriptor.GetValue(entity);
keyValueMap.Add(keyPropertyDescriptor, keyVal);
}
DbTable dbTable = table == null ? typeDescriptor.Table : new DbTable(table, typeDescriptor.Table.Schema);
DbExpression conditionExp = PrimaryKeyHelper.MakeCondition(keyValueMap, dbTable);
DbDeleteExpression e = new DbDeleteExpression(dbTable, conditionExp);
return(this.ExecuteNonQuery(e));
}
public override int Update <TEntity>(TEntity entity, string table)
{
PublicHelper.CheckNull(entity);
TypeDescriptor typeDescriptor = EntityTypeContainer.GetDescriptor(typeof(TEntity));
PublicHelper.EnsureHasPrimaryKey(typeDescriptor);
Dictionary <PropertyDescriptor, object> keyValueMap = PrimaryKeyHelper.CreateKeyValueMap(typeDescriptor);
IEntityState entityState = this.TryGetTrackedEntityState(entity);
Dictionary <PropertyDescriptor, DbExpression> updateColumns = new Dictionary <PropertyDescriptor, DbExpression>();
PropertyDescriptor timestampProperty = null;
object timestampValue = null;
foreach (PropertyDescriptor propertyDescriptor in typeDescriptor.PropertyDescriptors)
{
if (propertyDescriptor.IsPrimaryKey)
{
keyValueMap[propertyDescriptor] = propertyDescriptor.GetValue(entity);
continue;
}
if (propertyDescriptor.IsAutoIncrement)
{
continue;
}
if (propertyDescriptor.IsTimestamp())
{
timestampProperty = propertyDescriptor;
timestampValue = propertyDescriptor.GetValue(entity);
continue;
}
object val = propertyDescriptor.GetValue(entity);
if (entityState != null && !entityState.HasChanged(propertyDescriptor, val))
{
continue;
}
DbExpression valExp = DbExpression.Parameter(val, propertyDescriptor.PropertyType, propertyDescriptor.Column.DbType);
updateColumns.Add(propertyDescriptor, valExp);
}
if (updateColumns.Count == 0)
{
return(0);
}
DbTable dbTable = table == null ? typeDescriptor.Table : new DbTable(table, typeDescriptor.Table.Schema);
if (timestampValue != null)
{
keyValueMap[timestampProperty] = timestampValue;
}
DbExpression conditionExp = PrimaryKeyHelper.MakeCondition(keyValueMap, dbTable);
DbUpdateExpression e = new DbUpdateExpression(dbTable, conditionExp);
foreach (var item in updateColumns)
{
e.UpdateColumns.Add(item.Key.Column, item.Value);
}
int rowsAffected = 0;
if (timestampValue == null)
{
rowsAffected = this.ExecuteNonQuery(e);
if (entityState != null)
{
entityState.Refresh();
}
return(rowsAffected);
}
List <Action <TEntity, IDataReader> > mappers = new List <Action <TEntity, IDataReader> >();
mappers.Add(GetMapper <TEntity>(timestampProperty, e.Returns.Count));
e.Returns.Add(timestampProperty.Column);
IDataReader dataReader = this.ExecuteReader(e);
using (dataReader)
{
while (dataReader.Read())
{
rowsAffected++;
foreach (var mapper in mappers)
{
mapper(entity, dataReader);
}
}
}
return(rowsAffected);
}