/// <summary>
/// 从主键获取数据对象
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="primaryKeys">主键数组</param>
/// <returns>数据对象</returns>
public T SelectSingleFromKey <T>(params object[] primaryKeys)
where T : class, new()
{
DataTableEntityMapping dtmapping = DataMapping.GetTableMapping(typeof(T));
if (primaryKeys.Length != dtmapping.PrimaryKeyFields.Length)
{
throw new LightDataException(RE.TheNumberOfPrimaryKeysIsNotMatch);
}
DataFieldInfo[] primaryKeyInfos = new DataFieldInfo[primaryKeys.Length];
QueryExpression query = null;
for (int i = 0; i < primaryKeys.Length; i++)
{
primaryKeyInfos[i] = new DataFieldInfo(dtmapping.PrimaryKeyFields[i]);
if (i == 0)
{
query = primaryKeyInfos[i] == primaryKeys[i];
}
else
{
query = query & primaryKeyInfos[i] == primaryKeys[i];
}
}
return(SelectSingle(dtmapping, query, null, 0, SafeLevel.None) as T);
}
public override int Delete()
{
DataTableEntityMapping mapping = DataEntityMapping.GetTableMapping(typeof(T));
QueryCommand queryCommand = _context.Database.QueryDelete(_context, mapping, _query);
return(_context.ExecuteNonQuery(queryCommand.Command, _level));
}
/// <summary>
/// 生成数据删除命令
/// </summary>
/// <param name="entity">数据实体</param>
/// <returns>删除命令对象</returns>
public virtual IDbCommand CreateDeleteCommand(object entity)
{
DataTableEntityMapping mapping = DataMapping.GetTableMapping(entity.GetType());
if (mapping.PrimaryKeyFields == null || mapping.PrimaryKeyFields.Length == 0)
{
throw new LightDataException(RE.PrimaryKeyIsNotExist);
}
List <DataParameter> primaryList = GetDataParameters(mapping.PrimaryKeyFields, entity);
StringBuilder where = new StringBuilder();
IDataParameter[] dataParameters = new IDataParameter[primaryList.Count];
int count = 0;
foreach (DataParameter dataParameter in primaryList)
{
IDataParameter param = _database.CreateParameter("P" + count, dataParameter.Value, dataParameter.DbType, dataParameter.Direction);
where.AppendFormat("{0}={1} and ", CreateDataFieldSql(dataParameter.ParameterName), param.ParameterName);
dataParameters [count] = param;
count++;
}
where.Remove(where.Length - 5, 5);
StringBuilder sql = new StringBuilder();
sql.AppendFormat("delete from {0} where {1}", CreateDataTableSql(mapping.TableName), where);
IDbCommand command = _database.CreateCommand(sql.ToString());
command.CommandType = CommandType.Text;
foreach (IDataParameter param in dataParameters)
{
command.Parameters.Add(param);
}
return(command);
}
public async override Task <int> InsertAsync <K>(CancellationToken cancellationToken = default(CancellationToken))
{
DataTableEntityMapping insertMapping = DataEntityMapping.GetTableMapping(typeof(K));
QueryCommand queryCommand = _context.Database.SelectInsert(_context, insertMapping, _mapping, _query, _order);
return(await _context.ExecuteNonQueryAsync(queryCommand.Command, _level, cancellationToken));
}
public override int Insert <K>()
{
DataTableEntityMapping insertMapping = DataEntityMapping.GetTableMapping(typeof(K));
QueryCommand queryCommand = _context.Database.SelectInsert(_context, insertMapping, _mapping, _query, _order);
return(_context.ExecuteNonQuery(queryCommand.Command, _level));
}
public virtual IDbCommand CreateUpdateMassCommand(DataTableEntityMapping mapping, UpdateSetValue[] updateSetValues, QueryExpression query)
{
List <DataParameter> parameterlist = new List <DataParameter> ();
StringBuilder sql = new StringBuilder();
DataParameter[] parameters;
string queryString = GetQueryString(mapping, query, out parameters);
int length = updateSetValues.Length;
DataParameter[] setparameters = new DataParameter[length];
sql.AppendFormat("update {0} set ", CreateDataTableSql(mapping.TableName));
for (int i = 0; i < length; i++)
{
if (!mapping.Equals(updateSetValues [i].DataField.DataField.EntityMapping))
{
throw new LightDataException(RE.UpdateFieldTypeIsError);
}
setparameters [i] = updateSetValues [i].CreateDataParameter(this);
sql.AppendFormat("{0}={1}{2}", updateSetValues [i].DataField.CreateDataFieldSql(this), setparameters [i].ParameterName, i < length - 1 ? "," : " ");
}
if (!string.IsNullOrEmpty(queryString))
{
sql.AppendFormat(" {0}", queryString);
}
parameterlist.AddRange(parameters);
parameterlist.AddRange(setparameters);
IDbCommand command = BuildCommand(sql.ToString(), parameterlist.ToArray());
return(command);
}
public async override Task <int> DeleteAsync(CancellationToken cancellationToken = default(CancellationToken))
{
DataTableEntityMapping mapping = DataEntityMapping.GetTableMapping(typeof(T));
QueryCommand queryCommand = _context.Database.QueryDelete(_context, mapping, _query);
return(await _context.ExecuteNonQueryAsync(queryCommand.Command, _level, cancellationToken));
}
public async override Task <int> UpdateAsync(Expression <Func <T, T> > expression, CancellationToken cancellationToken = default(CancellationToken))
{
DataTableEntityMapping mapping = DataEntityMapping.GetTableMapping(typeof(T));
MassUpdator updator = LambdaExpressionExtend.CreateMassUpdator(expression);
QueryCommand queryCommand = _context.Database.QueryUpdate(_context, mapping, updator, _query);
return(await _context.ExecuteNonQueryAsync(queryCommand.Command, _level, cancellationToken));
}
public override int Update(Expression <Func <T, T> > expression)
{
DataTableEntityMapping mapping = DataEntityMapping.GetTableMapping(typeof(T));
MassUpdator updator = LambdaExpressionExtend.CreateMassUpdator(expression);
QueryCommand queryCommand = _context.Database.QueryUpdate(_context, mapping, updator, _query);
return(_context.ExecuteNonQuery(queryCommand.Command, _level));
}
public static string CreateKey(DataTableEntityMapping mapping, CreateSqlState state)
{
state.TryGetAliasTableName(mapping, out var aliasName);
var type = mapping.ObjectType;
var name = aliasName == null ? type.FullName : string.Concat(type.FullName, "_", aliasName);
return(name);
}
public MassUpdator(DataTableEntityMapping mapping)
{
if (mapping == null)
{
throw new ArgumentNullException(nameof(mapping));
}
this.mapping = mapping;
}
private int CheckDbSave(bool refresh, SafeLevel level)
{
DataContext context = GetContext();
int ret;
DataTableEntityMapping mapping = DataEntityMapping.GetTableMapping(this.GetType());
ret = context.InsertOrUpdate(mapping, this, level, refresh);
return(ret);
}
/// <summary>
/// 批量删除
/// </summary>
/// <returns>受影响数据</returns>
public int DeleteMass()
{
DataTableEntityMapping dtMapping = _mapping as DataTableEntityMapping;
if (dtMapping == null)
{
throw new LightDataException(RE.TheDataMappingNotAllowDeleteMass);
}
return(_context.DeleteMass(dtMapping, _query));
}
/// <summary>
/// 批量更新
/// </summary>
/// <param name="updates">更新字段值数组,类型必须和更新对象一致</param>
/// <returns>受影响数据</returns>
public int UpdateMass(UpdateSetValue[] updates)
{
DataTableEntityMapping dtMapping = _mapping as DataTableEntityMapping;
if (dtMapping == null)
{
throw new LightDataException(RE.TheDataMappingNotAllowDeleteMass);
}
return(_context.UpdateMass(dtMapping, updates, _query));
}
/// <summary>
/// 批量更新数据
/// </summary>
/// <param name="mapping">表映射</param>
/// <param name="updates">更新对象类型</param>
/// <param name="expression">查询表达式</param>
/// <returns>受影响行数</returns>
internal int UpdateMass(DataTableEntityMapping mapping, UpdateSetValue[] updates, QueryExpression expression)
{
int rInt = 0;
using (IDbCommand command = _dataBase.Factory.CreateUpdateMassCommand(mapping, updates, expression))
{
rInt = ExecuteNonQuery(command, SafeLevel.Default);
}
return(rInt);
}
private async Task <int> CheckDbSaveAsync(bool refresh, SafeLevel level, CancellationToken cancellationToken = default(CancellationToken))
{
DataContext context = GetContext();
int ret;
DataTableEntityMapping mapping = DataEntityMapping.GetTableMapping(this.GetType());
ret = await context.InsertOrUpdateAsync(mapping, this, level, refresh, cancellationToken);
return(ret);
}
public virtual void UpdateDataIdentity(DataTableEntityMapping mapping, object data, object id)
{
if (!Equals(id, null))
{
if (id.GetType() != mapping.IdentityField.ObjectType)
{
id = Convert.ChangeType(id, mapping.IdentityField.ObjectType);
}
mapping.IdentityField.Handler.Set(data, id);
}
}
protected override string CreateIdentitySql(DataTableEntityMapping mapping)
{
if (mapping.IdentityField != null)
{
return("select last_insert_id();");
}
else
{
return(string.Empty);
}
}
public virtual IDbCommand CreateIdentityCommand(DataTableEntityMapping mapping)
{
IDbCommand command = null;
string sql = CreateIdentitySql(mapping);
if (!string.IsNullOrEmpty(sql))
{
command = BuildCommand(sql.ToString(), null);
}
return(command);
}
protected virtual string CreateIdentitySql(DataTableEntityMapping mapping)
{
if (mapping.IdentityField != null)
{
return("select @@Identity;");
}
else
{
return(string.Empty);
}
}
public virtual QueryCommand QueryUpdate(DataContext context, DataTableEntityMapping mapping, MassUpdator updator, QueryExpression query)
{
CreateSqlState state = new CreateSqlState(context);
CommandData commandData = _factory.CreateMassUpdateCommand(mapping, updator, query, state);
DbCommand command = commandData.CreateCommand(this, state);
QueryCommand queryCommand = new QueryCommand()
{
Command = command
};
return(queryCommand);
}
protected override string CreateIdentitySql(DataTableEntityMapping mapping)
{
if (mapping.IdentityField != null)
{
string seq = GetIndentitySeq(mapping);
return(string.Format("select {0}.currval from dual", seq));
}
else
{
return(string.Empty);
}
}
public virtual QueryCommand SelectInsert(DataContext context, DataTableEntityMapping insertMapping, DataEntityMapping selectMapping, QueryExpression query, OrderExpression order)
{
CreateSqlState state = new CreateSqlState(context);
CommandData commandData = _factory.CreateSelectInsertCommand(insertMapping, selectMapping, query, order, state);
DbCommand command = commandData.CreateCommand(this, state);
QueryCommand queryCommand = new QueryCommand()
{
Command = command
};
return(queryCommand);
}
public virtual QueryCommand DeleteByKey(DataContext context, DataTableEntityMapping mapping, object[] keys)
{
CreateSqlState state = new CreateSqlState(context, false);
CommandData commandData = _factory.CreateDeleteKeyCommand(mapping, keys, state);
DbCommand command = commandData.CreateCommand(this, state);
QueryCommand queryCommand = new QueryCommand()
{
Command = command
};
return(queryCommand);
}
public virtual QueryCommand SelectById(DataContext context, DataTableEntityMapping mapping, object id)
{
CreateSqlState state = new CreateSqlState(context, false);
CommandData commandData = _factory.CreateSelectByIdCommand(mapping, id, state);
DbCommand command = commandData.CreateCommand(this, state);
QueryCommand queryCommand = new QueryCommand()
{
Command = command
};
return(queryCommand);
}
public virtual QueryCommand BatchDelete(DataContext context, DataTableEntityMapping mapping, IList datas)
{
CreateSqlState state = new CreateSqlState(context, false);
CommandData commandData = _factory.CreateBatchDeleteCommand(mapping, datas, state);
DbCommand command = commandData.CreateCommand(this, state);
QueryCommand queryCommand = new QueryCommand()
{
Command = command
};
return(queryCommand);
}
/// <summary>
/// Gets the table mapping.
/// </summary>
/// <returns>The table mapping.</returns>
/// <param name="type">Type.</param>
public static DataTableEntityMapping GetTableMapping(Type type)
{
DataTableEntityMapping dataMapping = GetEntityMapping(type) as DataTableEntityMapping;
if (dataMapping == null)
{
throw new LightDataException(SR.IsNotDataTableMapping);
}
else
{
return(dataMapping);
}
}
/// <summary>
/// 创建新对象
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <returns>数据对象</returns>
public T CreateNew <T>()
where T : class, new()
{
DataTableEntityMapping rawmapping = DataMapping.GetTableMapping(typeof(T));
T obj = rawmapping.InitialData() as T;
if (rawmapping.IsDataEntity)
{
DataEntity data = obj as DataEntity;
data.SetContext(this);
}
return(obj);
}
public virtual QueryCommand TruncateTable(DataContext context, DataTableEntityMapping mapping)
{
CreateSqlState state = new CreateSqlState(context);
CommandData commandData = _factory.CreateTruncateTableCommand(mapping, state);
DbCommand command = commandData.CreateCommand(this, state);
QueryCommand queryCommand = new QueryCommand()
{
Command = command,
InnerPage = commandData.InnerPage
};
return(queryCommand);
}
public virtual QueryCommand Insert(DataContext context, DataTableEntityMapping mapping, object data, bool refresh, bool updateIdentity)
{
CreateSqlState state = new CreateSqlState(context, false);
CommandData commandData = _factory.CreateBaseInsertCommand(mapping, data, refresh, updateIdentity, state);
DbCommand command = commandData.CreateCommand(this, state);
QueryCommand queryCommand = new QueryCommand()
{
Command = command,
IdentitySql = commandData.IdentitySql
};
return(queryCommand);
}
