/// <summary>
/// 构造左连接SQL
/// </summary>
/// <param name="sql">Select语句</param>
/// <param name="association">关联</param>
private void BuildLeftJoin(SelectSqlStatement sql, InternalAssociation association, SqlBuildingContext context)
{
LeftJoinItem leftJoin = new LeftJoinItem();
leftJoin.LeftJoinTable = association.LocatedTable;
foreach (var item in association.Association.Items)
{
SqlTable srcElelemtTable = association.LocatedTable;
var srcElement = association.LocatedNode.Elements.FirstOrDefault(i => i.ID == item.SourceElementID);
var targetElement = association.AssociatedCoNode.Elements.FirstOrDefault(i => i.ID == item.TargetElementID);
var leftCol = association.LocatedDataObject.Columns.FirstOrDefault(i => i.ID == srcElement.DataColumnID);
var rightCol = association.AssociatedDataObject.Columns.FirstOrDefault(i => i.ID == targetElement.DataColumnID);
JoinConditionItem joinItem = new JoinConditionItem();
joinItem.LeftField.Table = srcElelemtTable;
joinItem.LeftField.FieldName = leftCol.ColumnName;
joinItem.LeftField.IsUseFieldPrefix = true;
joinItem.RightField.Table = association.AssociatedTable;
joinItem.RightField.FieldName = rightCol.ColumnName;
joinItem.RightField.IsUseFieldPrefix = true;
leftJoin.ChildCollection.Add(joinItem);
}
//关联上的条件
leftJoin.AdditionalCondition = this.ParseCondition(association);
sql.MainFromItem.ChildCollection.Add(leftJoin);
}
/// <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>
/// 构造处理Select语句中查询字段部分
/// </summary>
/// <param name="sql">Select语句</param>
/// <param name="co">通用中间对象</param>
/// <param name="domainObject">当前节点对象</param>
/// <param name="dataObject">当前节点对应的数据对象</param>
public void BuildQueryFieldList(SelectSqlStatement sql, DomainObject domainObject, DataObject dataObject)
{
var elements = domainObject.Elements.Where(i => i.ElementType != ElementType.Virtual || i.ElementType != ElementType.Reference);
foreach (var element in elements)
{
if (string.IsNullOrEmpty(element.DataColumnID))
{
continue;
}
var column = dataObject.Columns.FirstOrDefault(i => i.ID == element.DataColumnID);
if (column == null)
{
throw new Exception("");
}
var field = new SelectListField()
{
Table = sql.SqlBuildingInfo.CurrentSqlTable,
IsUseAlias = true,
IsUseFieldPrefix = true,
FieldName = column.ColumnName,
FieldAlias = element.Alias
};
sql.SelectList.ChildCollection.Add(field);
}
//关联过来的字段不需要在此处理，在关联中处理
}
/// <summary>
/// 构造Select语句中过滤条件
/// </summary>
/// <remarks>
/// 根节点和子节点分开处理
/// </remarks>
/// <param name="sql">Sql语句对象</param>
/// <param name="context">SQL构造上下文</param>
public void BuildSQLCondition(SelectSqlStatement sql, SqlBuildingContext context)
{
//根节点情况
if (sql.SqlBuildingInfo.CurrentNode.ID == sql.SqlBuildingInfo.CommonObject.RootDomainObjectID ||
sql.SqlBuildingInfo.CurrentNode.IsRootObject)
{
// 解析授权访问控制的约束条件:主表的查询支持权限关联条件。
this.ParseSecurityCondition(sql, context);
// 处理过滤条件中的引用元素
//this.HandlingFilterConditionRefElement(sql, context.FilterCondition, context);
// 解析外部传入的过滤条件（表单、帮助、报表等）,注:只处理主对象上的过滤条件。
base.GetSelectSqlCondition(sql, context, sql.SqlBuildingInfo.RootNode, sql.SqlBuildingInfo.RootDataObject);
//// 解析模型上的过滤条件
//if (filterCondition != null)
//{
// sql.FilterCondition.ChildCollection.Add(filterCondition);
//}
// 解析排序条件
sql.OrderByCondition.ConditionString =
base.ParseOrderByCondition(context.OrderByCondition, sql.SqlBuildingInfo);
//解析额外的过滤条件
//string extendFilterCondition = ParseExtendFilterCondition(sql.SqlBuildingInfo, context);
//if (string.IsNullOrEmpty(extendFilterCondition) == false)
//{
// if (string.IsNullOrWhiteSpace(sql.FilterCondition.ConditionString))
// sql.FilterCondition.ConditionString = extendFilterCondition;
// else
// sql.FilterCondition.ChildCollection.Add = string.Format("{0} and ({1})", sql.FilterCondition.ConditionString, extendFilterCondition);
//}
// 获取前多少条数据。
sql.TopSize = context.PageSize;
}
else // 子节点情况
{
var mainDo = context.CommonObject.RootDomainObject.DataObject;
// 处理过滤条件中的引用元素
//this.HandlingFilterConditionRefElement(sql, context.FilterCondition, context);
// 解析外部传入的过滤条件（表单、帮助、报表等）,注:只处理主对象上的过滤条件。
//var filterCondition = base.GeInputCondition(context, sql.SqlBuildingInfo.RootNode,
// sql.SqlBuildingInfo.RootDataObject, sql.SqlBuildingInfo);
//// 解析模型上的过滤条件
//if (filterCondition != null)
// sql.FilterCondition.ChildCollection.Add(filterCondition);
base.GetSelectSqlCondition(sql, context, sql.SqlBuildingInfo.RootNode, sql.SqlBuildingInfo.RootDataObject);
// 解析排序条件
sql.OrderByCondition.ConditionString =
base.ParseOrderByCondition(context.OrderByCondition, sql.SqlBuildingInfo);
}
}
public void BuildSQLJoin(SelectSqlStatement sql, SqlBuildingContext context)
{
//获取到当前节点的关联关系，排除主从类型的关联
var associations = context.Node.Associations.Where(i => i.AssociateType == AssociateType.OuterLeftJoin);
if (associations == null || associations.Count() == 0) return;
foreach (var association in associations)
{
HandlingAssociation(sql, context, association);
}
}
/// <summary>
/// 处理关联
/// </summary>
/// <param name="sql">Select语句</param>
/// <param name="context">SQL构造上下文</param>
/// <param name="association">关联</param>
private void HandlingAssociation(SelectSqlStatement sql, SqlBuildingContext context, Association association)
{
if (association.AssoDomainObject == null)
{
throw new Exception("Association cannot find Associate Model: " + association.ID);
}
if (association.AssoDomainObject == null)
{
throw new Exception("Association cannot find Associate ModelObject: " + association.ID);
}
if (association.AssoDomainObject.DataObject == null)
{
throw new Exception("Association cannot find Associate DataObject: " + association.ID);
}
//关联中使用的SqlTable,通过关联的ID进行标识，存在一个节点上的多个元素关联同一个表的情况
SqlTable associatedSqlTable = base.FindSqlTable(association.ID, sql.SqlBuildingInfo);
if (associatedSqlTable == null)
{
var assoTableName = context.DataObjectTableMapping[association.AssoDomainObject.DataObject.ID];
associatedSqlTable = base.TryFindAndRegistSqlTable(association.AssoDomainObject.DataObject.ID, assoTableName, assoTableName, assoTableName, sql.SqlBuildingInfo);
}
var childAssociation = new InternalAssociation()
{
AssociatedCommonObject = association.AssoDomaiModel,
AssociatedCoNode = association.AssoDomainObject,
AssociatedDataObject = association.AssoDomainObject.DataObject,
AssociatedTable = associatedSqlTable,
LocatedCommonObject = sql.SqlBuildingInfo.CommonObject,
LocatedDataObject = sql.SqlBuildingInfo.CurrentDataObject,
LocatedNode = sql.SqlBuildingInfo.CurrentNode,
LocatedTable = sql.SqlBuildingInfo.CurrentSqlTable,
Association = association,
AdditionalCondition = association.FilterCondition
};
foreach (var refElement in association.RefElements)
{
var element = association.AssoDomainObject.Elements.FirstOrDefault(i => i.ID == refElement.ElementID);
var assElement = new InternalRefElement()
{
Element = element,
Label = element.Alias
};
childAssociation.RefElements.Add(assElement);
}
BuildLeftJoin(sql, childAssociation, context);
}
internal FilterConditionStatement ParseFilterCondition(SelectSqlStatement sql, SqlBuildingContext context)
{
if (context.QueryFilter != null)
{
var filter = ConditionStatementParser.ParseFiletrClauses(sql, context.QueryFilter.FilterClauses,
context.Node, context.DataObject);
return(filter);
}
return(null);
}
public static FilterConditionStatement ParseFiletrClauses(SelectSqlStatement sql, List<FilterClause> filterClauses,
DomainObject domainObject, DataObject dataObject)
{
var filterConditionStatement = new FilterConditionStatement();
var filterConditions = new List<ConditionStatement>();
if (filterClauses == null || filterClauses.Count == 0)
return filterConditionStatement;
var filterGroups = filterClauses.GroupBy(i => i.FilterField.GroupName);
if (filterGroups.Count() > 1)
{
foreach (var group in filterGroups)
{
var subFilterConditionState = new FilterConditionStatement();
foreach (var filter in group)
{
var conditionStatement = ParseConditionStatement(filter, domainObject, dataObject, sql.SqlBuildingInfo.CurrentSqlTable);
subFilterConditionState.ChildCollection.Add(conditionStatement);
}
filterConditionStatement.ChildCollection.Add(subFilterConditionState);
}
}
else
{
foreach (var filter in filterClauses)
{
var conditionStatement = ParseConditionStatement(filter, domainObject, dataObject, sql.SqlBuildingInfo.CurrentSqlTable);
filterConditionStatement.ChildCollection.Add(conditionStatement);
}
}
for (int i = 0; i < filterConditionStatement.ChildCollection.Count; i++)
{
var conditionStatement = filterConditionStatement.ChildCollection[i] as ConditionStatement;
conditionStatement.ConditionFieldValue.ConditionFieldName += i;
}
return filterConditionStatement;
}
/// <summary>
/// 解析外部传入的过滤条件。
/// </summary>
/// <param name="context">SQL构造上下文信息。</param>
/// <param name="currentObject">主键过滤条件对应的GSPNode。</param>
/// <param name="dataObject">主键过滤条件对应的GSPDataTable。</param>
/// <param name="sqlInfo">SQL拼装的中间变量。</param>
/// <returns>解析后的过滤条件。</returns>
protected void GetSelectSqlCondition(SelectSqlStatement sql, SqlBuildingContext context, DomainObject currentObject, DataObject dataObject)
{
//若是非主键形式条件定义。
if (context.IsUseCondition)
{
var condition = this.GetOrdinaryCondition(context, sql.SqlBuildingInfo);
if (condition != null)
{
sql.FilterCondition.ChildCollection.Add(condition);
}
}
//若是根据主键值，则获取主键值条件Sql语句。
var sqlPrimaryKey = this.GetPrimaryKeyCondition(context, currentObject, dataObject, sql.SqlBuildingInfo);
if (sqlPrimaryKey != null)
{
sql.FilterCondition.ChildCollection.Add(sqlPrimaryKey);
}
}
/// <summary>
/// 解析权限过滤条件
/// </summary>
/// <param name="sql"></param>
/// <param name="context"></param>
internal void ParseSecurityCondition(SelectSqlStatement sql, SqlBuildingContext context)
{
}
/// <summary>
/// 构造查询SQL语句中表主要的内连接部分
/// </summary>
/// <remarks>
/// 处理时分为几种场景：
/// 1. 当前节点是根节点时，不做任何处理
/// 2. 当前节点不是根节点时，此时需要和父节点进行内连接关联过滤数据（例如主从结构），
/// 如果关联的父节点不是根节点，上级也存在父节点(例如主从从结构)，此时要进行递归循环处理
/// 提示：
/// 所有内连接的场景均是在同一个领域模型情形下，不可能关联到其他CO的节点。
/// </remarks>
/// <param name="sql">Sql语句对象</param>
/// <param name="domainModel">通用中间对象</param>
/// <param name="currentObject">当前解析用到的节点对象</param>
/// <param name="dataObject">当前解析用到的节点对象对应的数据对象</param>
public void BuildMainInnerJoin(SelectSqlStatement sql, SqlBuildingContext context)
{
var currentObject = context.Node;
var dataObject = context.DataObject;
//当前节点是根节点时, 直接返回
if (currentObject.IsRootObject || context.CommonObject.RootDomainObject.ID == currentObject.ID) return;
//获取到当前节点的主从关联,主从关系中的主从关联关系是存放在子节点的关联集合上
var associations = currentObject.Associations.Where(i => i.AssociateType == AssociateType.InnerJoin);
if (associations == null || associations.Count() == 0) return;
var currentTableName = context.DataObjectTableMapping[dataObject.ID];
SqlTable cTable = base.FindSqlTable(currentTableName, sql.SqlBuildingInfo);
if (cTable == null)
{
cTable = base.TryFindAndRegistSqlTable(currentTableName, currentTableName, currentTableName, currentTableName, sql.SqlBuildingInfo);
}
string parentDataObjectID = currentObject.ParentObject.DataObjectID;
var parentTableName = context.DataObjectTableMapping[parentDataObjectID];
SqlTable pTable = base.FindSqlTable(parentTableName, sql.SqlBuildingInfo);
if (pTable == null)
{
pTable = base.TryFindAndRegistSqlTable(parentTableName, parentTableName, parentTableName, parentTableName, sql.SqlBuildingInfo);
}
var innerJoin = new InnerJoinItem();
innerJoin.InnerJoinTable = pTable;
foreach (Association association in associations)
{
foreach (var item in association.Items)
{
var srcElement = currentObject.Elements.FirstOrDefault(i => i.ID == item.SourceElementID);
var srcColumn = dataObject.Columns.FirstOrDefault(i => i.ID == srcElement.DataColumnID);
if (srcColumn == null)
throw new Exception("Cannot find inner join column:" + srcElement.DataColumnID);
var targetElement = currentObject.ParentObject.Elements.FirstOrDefault(i => i.ID == item.TargetElementID);
var targetColumn = currentObject.ParentObject.DataObject.Columns.FirstOrDefault(i => i.ID == targetElement.DataColumnID);
if (srcColumn == null)
throw new Exception("Cannot find inner join column:" + targetElement.DataColumnID);
var joinItem = new JoinConditionItem();
joinItem.LeftField = new ConditionField();
joinItem.RightField = new ConditionField();
joinItem.LeftField.Table = cTable;
joinItem.LeftField.IsUseFieldPrefix = true;
joinItem.LeftField.FieldName = srcColumn.ColumnName;
joinItem.RightField.Table = pTable;
joinItem.RightField.IsUseFieldPrefix = true;
joinItem.RightField.FieldName = targetColumn.ColumnName;
innerJoin.ChildCollection.Add(joinItem);
}
sql.MainFromItem.ChildCollection.Add(innerJoin);
//如果关联的父节点上还有存在父级节点，递归进行处理,直至根节点退出
if (association.AssoDomainObject.ParentObject != null)
{
context.Node = association.AssoDomainObject.ParentObject;
context.DataObject = association.AssoDomainObject.ParentObject.DataObject;
BuildMainInnerJoin(sql, context);
}
}
}
/// <summary>
/// 构造Select语句中过滤条件
/// </summary>
/// <remarks>
/// 根节点和子节点分开处理
/// </remarks>
/// <param name="sql">Sql语句对象</param>
/// <param name="context">SQL构造上下文</param>
public void BuildSQLCondition(SelectSqlStatement sql, SqlBuildingContext context)
{
//根节点情况
if (sql.SqlBuildingInfo.CurrentNode.ID == sql.SqlBuildingInfo.CommonObject.RootDomainObjectID ||
sql.SqlBuildingInfo.CurrentNode.IsRootObject)
{
// 解析授权访问控制的约束条件:主表的查询支持权限关联条件。
this.ParseSecurityCondition(sql, context);
// 处理过滤条件中的引用元素
//this.HandlingFilterConditionRefElement(sql, context.FilterCondition, context);
// 解析外部传入的过滤条件（表单、帮助、报表等）,注:只处理主对象上的过滤条件。
base.GetSelectSqlCondition(sql, context, sql.SqlBuildingInfo.RootNode, sql.SqlBuildingInfo.RootDataObject);
// 解析过滤条件
var fiterCondition = base.ParseFilterCondition(sql, context);
if (fiterCondition != null)
{
sql.FilterCondition.ChildCollection.Add(fiterCondition);
}
// 解析排序条件
sql.OrderByCondition = base.ParseOrderByCondition(context);
// 获取前多少条数据。
if (context.QueryFilter != null && context.QueryFilter.LimitCount > 0)
{
sql.TopSize = context.QueryFilter.LimitCount;
}
}
else // 子节点情况
{
var mainDo = context.CommonObject.RootDomainObject.DataObject;
// 处理过滤条件中的引用元素
//this.HandlingFilterConditionRefElement(sql, context.FilterCondition, context);
// 解析外部传入的过滤条件（表单、帮助、报表等）,注:只处理主对象上的过滤条件。
//var filterCondition = base.GeInputCondition(context, sql.SqlBuildingInfo.RootNode,
// sql.SqlBuildingInfo.RootDataObject, sql.SqlBuildingInfo);
//// 解析模型上的过滤条件
//if (filterCondition != null)
// sql.FilterCondition.ChildCollection.Add(filterCondition);
if (context.DataContext.MainDomainObject.IsRootObject)
{
base.GetSelectSqlCondition(sql, context, sql.SqlBuildingInfo.RootNode, sql.SqlBuildingInfo.RootDataObject);
}
else
{
base.GetSelectSqlCondition(sql, context, sql.SqlBuildingInfo.CurrentNode, sql.SqlBuildingInfo.CurrentDataObject);
}
// 解析排序条件
sql.OrderByCondition = base.ParseOrderByCondition(context);
// 获取前多少条数据。
if (context.QueryFilter != null && context.QueryFilter.LimitCount > 0)
{
sql.TopSize = context.QueryFilter.LimitCount;
}
}
// 分页设置
if (context.QueryFilter != null && context.QueryFilter.PageParameter != null)
{
sql.PageCount = context.QueryFilter.PageParameter.PageSize;
sql.PageIndex = context.QueryFilter.PageParameter.CurrentPageIndex;
}
}
