/// <summary>
/// 构造主键的过滤条件。
/// </summary>
/// <param name="context">SQL构造上下文信息。</param>
/// <param name="sqlInfo">SQL拼装的中间变量。</param>
/// <param name="currentObject">主键过滤条件对应的领域对象</param>
/// <param name="pkColumnData">主键值Dictionary，Key是ElemetID，Value是列的值。</param>
/// <param name="IsUseFieldPrefix">是否使用列全名。</param>
/// <returns>主键过滤条件</returns>
protected SqlPrimaryKey GetPrimaryKeyConditions(SqlBuildingContext context, SqlBuildingInfo sqlInfo,
DomainObject currentObject, IDictionary <string, object> data, bool IsUseFieldPrefix = false)
{
var curDataObject = currentObject.DataObject;
var tableName = context.DataObjectTableMapping[curDataObject.ID];
SqlTable curTable = this.FindSqlTable(tableName, sqlInfo);
if (curTable == null)
{
curTable = new SqlTable(tableName, tableName, tableName);
this.RegistSqlTable(tableName, curTable, sqlInfo);
}
//var data = context.DataContext.GetCurrentDataContextItem(currentObject.ID);
var primaryKey = new SqlPrimaryKey();
foreach (var column in curDataObject.PKColumns)
{
var keyField = new SqlPrimaryKeyField(curTable, column.ColumnName);
var pkElement = currentObject.Elements.FirstOrDefault(i => i.DataColumnID == column.ID);
keyField.Value.Value = data[pkElement.ID];
keyField.IsUseFieldPrefix = true;
primaryKey.ChildCollection.Add(keyField);
}
return(primaryKey);
}
/// <summary>
/// 对Select类SQL语句进行参数处理
/// </summary>
/// <param name="sqlStatement">待处理的SQL语句</param>
/// <param name="db">数据访问对象</param>
/// <returns>处理后的参数数组</returns>
private List <IDbDataParameter> ParameterHandlerForSelect(SqlStatement sqlStatement, ITeldDatabase db)
{
var selectSql = sqlStatement as SelectSqlStatement;
var parameters = new List <IDbDataParameter>(selectSql.FilterCondition.ChildCollection.Count);
for (int parameterIndex = 0; parameterIndex < selectSql.FilterCondition.ChildCollection.Count; parameterIndex++)
{
var filterCondition = selectSql.FilterCondition.ChildCollection[parameterIndex];
if (filterCondition is SqlPrimaryKey)
{
foreach (var keyField in filterCondition.ChildCollection)
{
SqlPrimaryKeyField pkField = keyField as SqlPrimaryKeyField;
if (pkField == null)
{
throw new Exception("ParameterHandlerForUpdate.updateField, parameterIndex:" + parameterIndex);
}
parameters.Add(ParameterHandler(db, pkField.Value, pkField));
}
}
}
return(parameters);
}
/// <summary>
/// 获取主键过滤条件。
/// </summary>
/// <param name="context">SQL构造上下文信息。</param>
/// <param name="domainObject">领域对象</param>
/// <param name="curDataObject">数据对象</param>
/// <param name="sqlInfo">SQL拼装的中间变量。</param>
/// <returns>主键的过滤条件。</returns>
private SqlPrimaryKey GetPrimaryKeyCondition(SqlBuildingContext context, DomainObject domainObject, DataObject curDataObject, SqlBuildingInfo sqlInfo)
{
var tableName = context.DataObjectTableMapping[curDataObject.ID];
SqlTable curTable = this.FindSqlTable(tableName, sqlInfo);
if (curTable == null)
{
curTable = new SqlTable(tableName, tableName, tableName);
this.RegistSqlTable(tableName, curTable, sqlInfo);
}
var data = context.DataContext.GetCurrentDataContextItem(domainObject.ID);
if (data.PrimaryKeyData.Count == 0)
{
return(null);
}
var primaryKey = new SqlPrimaryKey();
foreach (var column in curDataObject.PKColumns)
{
var keyField = new SqlPrimaryKeyField(curTable, column.ColumnName);
var pkElement = domainObject.Elements.FirstOrDefault(i => i.DataColumnID == column.ID);
keyField.Value.Value = data.PrimaryKeyData[pkElement.ID];
keyField.IsUseFieldPrefix = true;
primaryKey.ChildCollection.Add(keyField);
}
return(primaryKey);
}
/// <summary>
/// 获取CO上某GSPNode的GSPAbsDBTable主键的过滤条件。
/// </summary>
/// <param name="context">SQL构造上下文信息。</param>
/// <param name="sqlInfo">SQL拼装的中间变量。</param>
/// <param name="coNode">主键过滤条件对应的GSPNode。</param>
/// <param name="dbTable">主键过滤条件对应的GSPAbsDBTable。</param>
/// <param name="IsUseFieldPrefix">是否使用表名</param>
/// <returns>主键的过滤条件。</returns>
protected string GetPrimaryKeyCondition(SqlBuildingContext context, SqlBuildingInfo sqlInfo,
DomainObject coNode, bool IsUseFieldPrefix = false)
{
var tableName = context.TableName;
var tableKey = tableName;
var sqlPrimaryKey = new SqlPrimaryKey();
var sqlTable = this.TryFindAndRegistSqlTable(tableKey, tableName, tableName, tableName, sqlInfo);
var pkColumnData = context.DataContext.GetCurrentDataContextItem(context.Node.ID).PrimaryKeyData;
foreach (DataColumn item in context.DataObject.PKColumns)
{
var pkElement = context.Node.Elements.FirstOrDefault(i => i.DataColumnID == item.ID);
if (pkElement == null)
{
throw new Exception("Cannot find PkElement, Column ID: " + item.ID);
}
if (pkColumnData.ContainsKey(pkElement.ID))
{
var keyField = new SqlPrimaryKeyField();
keyField.Table = sqlTable;
keyField.FieldName = item.ColumnName;
keyField.Value.Value = pkColumnData[pkElement.ID];
keyField.IsUseFieldPrefix = IsUseFieldPrefix;
sqlPrimaryKey.ChildCollection.Add(keyField);
}
}
return(sqlPrimaryKey.ToSQL());
}
/// <summary>
/// 构造查询主体部分
/// </summary>
/// <remarks>查询主体是一个子查询，为了支持一个数据对象多个数据库表</remarks>
/// <param name="sql">Select语句</param>
/// <param name="domainModel">通用中间对象</param>
/// <param name="domainObject">当前节点</param>
/// <param name="dataObject">当前节点对应的数据对象</param>
private void BuildMainFrom(SelectSqlStatement sql, DomainModel.Spi.DomainModel domainModel, DomainObject domainObject, DataObject dataObject, string tableName, SqlBuildingContext sqlContext)
{
//初始化主查询SQL语句
var context = sqlContext.DataContext;
sql.NodeID = domainObject.ID;
sql.CommonObjectID = domainModel.ID;
sql.NodeVersion = domainModel.Version.ToString();
sql.CommonObjectVersion = domainModel.Version.ToString();
sql.TableName = tableName;
sql.TableCode = tableName;
sql.SqlBuildingInfo = base.InitSqlBuildingInfo(domainModel, domainObject, dataObject, tableName, sqlContext.DataSource);
if (context.Data.ContainsKey(domainObject.ID))
{
var dataContextItem = context.GetCurrentDataContextItem(domainObject.ID);
foreach (var column in dataObject.PKColumns)
{
var pkField = new SqlPrimaryKeyField(sql.SqlBuildingInfo.CurrentSqlTable, column.ColumnName);
var pkElement = domainObject.Elements.FirstOrDefault(i => i.DataColumnID == column.ID);
pkField.Value.Value = dataContextItem.PrimaryKeyData[pkElement.ID];
sql.PrimaryKeys.ChildCollection.Add(pkField);
}
}
//将子查询加入到当前Select语句中
sql.From.ChildCollection.Add(sql.SqlBuildingInfo.CurrentSqlTable);
}
/// <summary>
/// 克隆
/// </summary>
/// <returns>主键类</returns>
public override object Clone()
{
SqlPrimaryKeyField newObj = this.MemberwiseClone() as SqlPrimaryKeyField;
if (this.Value != null)
{
newObj.fieldValue = this.Value.Clone() as FieldValue;
}
return(newObj);
}
/// <summary>
/// 根据SQLDOM元素类型初始化SQLDOM元素对象
/// </summary>
/// <param name="sqlElementType">SQLDOM元素类型</param>
/// <returns>SQLDOM元素对象</returns>
public static SqlElement GetSQLElement(int sqlElementType)
{
SqlElement element = null;
SqlElementType type = (SqlElementType)sqlElementType;
switch (type)
{
case SqlElementType.InsertField:
element = new InsertField();
break;
case SqlElementType.SqlPrimaryKeyField:
element = new SqlPrimaryKeyField();
break;
case SqlElementType.SelectListField:
element = new SelectListField();
break;
case SqlElementType.UpdateField:
element = new UpdateField();
break;
case SqlElementType.From:
element = new From();
break;
case SqlElementType.FromItem:
element = new FromItem();
break;
case SqlElementType.JoinCondition:
element = new JoinConditionStatement();
break;
case SqlElementType.OrderByCondition:
element = new ConditionStatement();
break;
case SqlElementType.FilterCondition:
element = new ConditionStatement();
break;
case SqlElementType.UnKnown:
break;
}
return(element);
}
/// <summary>
/// 对Select类SQL语句进行参数处理
/// </summary>
/// <param name="sqlStatement">待处理的SQL语句</param>
/// <param name="db">数据访问对象</param>
/// <returns>处理后的参数数组</returns>
private List <IDbDataParameter> ParameterHandlerForDelete(SqlStatement sqlStatement, ITeldDatabase db)
{
var deleteSql = sqlStatement as DeleteSqlStatement;
var parameters = new List <IDbDataParameter>();
if (deleteSql.SubQuerySql != null)
{
for (int parameterIndex = 0; parameterIndex < deleteSql.SubQuerySql.Condition.ChildCollection.Count; parameterIndex++)
{
var filterCondition = deleteSql.SubQuerySql.Condition.ChildCollection[parameterIndex];
if (filterCondition is SqlPrimaryKey)
{
foreach (var keyField in filterCondition.ChildCollection)
{
SqlPrimaryKeyField pkField = keyField as SqlPrimaryKeyField;
if (pkField == null)
{
throw new Exception("ParameterHandlerForDelete.PkField, parameterIndex:" + parameterIndex);
}
parameters.Add(ParameterHandler(db, pkField.Value, pkField));
}
}
}
}
else
{
for (int parameterIndex = 0; parameterIndex < deleteSql.Conditions.ChildCollection.Count; parameterIndex++)
{
var filterCondition = deleteSql.Conditions.ChildCollection[parameterIndex];
if (filterCondition is SqlPrimaryKey)
{
foreach (var keyField in filterCondition.ChildCollection)
{
SqlPrimaryKeyField pkField = keyField as SqlPrimaryKeyField;
if (pkField == null)
{
throw new Exception("ParameterHandlerForDelete.PkField, parameterIndex:" + parameterIndex);
}
parameters.Add(ParameterHandler(db, pkField.Value, pkField));
}
}
}
}
return(parameters);
}
/// <summary>
/// 处理通用中间对象的节点的GSPAbsDBTable。
/// </summary>
/// <param name="sql">Sql语句对象。</param>
/// <param name="domainModel">领域模型。</param>
/// <param name="domainObject">领域对象。</param>
/// <param name="dataObject">领域对象对应的数据对象。</param>
/// <param name="tableName">表名称。</param>
protected void HandlingSqlStatement(SqlStatement sql, SqlBuildingContext context)
{
sql.NodeID = context.Node.ID;
sql.CommonObjectID = context.CommonObject.ID;
sql.NodeVersion = context.CommonObject.Version.ToString();
sql.CommonObjectVersion = context.CommonObject.Version.ToString();
sql.TableName = context.TableName;
//构造SqlBuildingInfo
sql.SqlBuildingInfo = this.InitSqlBuildingInfo(context.CommonObject, context.Node, context.DataObject, context.TableName, context.DataSource);
//复合主键
foreach (var item in context.DataObject.PKColumns)
{
var keyField = new SqlPrimaryKeyField();
keyField.FieldName = item.ColumnName;
sql.PrimaryKeys.ChildCollection.Add(keyField);
}
}
/// <summary>
/// 转换成SQL
/// </summary>
/// <returns>SQL</returns>
public override string ToSQL()
{
if (this.ChildCollection == null || this.ChildCollection.Count == 0)
{
return(string.Empty);
}
var result = new StringBuilder();
SqlPrimaryKeyField keyField = null;
for (int i = 0; i < this.ChildCollection.Count; i++)
{
keyField = this.ChildCollection[i] as SqlPrimaryKeyField;
result.Append(keyField.ToSQL());
if (i < this.ChildCollection.Count - 1)
{
result.Append(" AND ");
}
}
return(result.ToString());
}