/// <summary>
/// 查询单列数据
/// </summary>
/// <param name="fieldInfo">字段信息</param>
/// <param name="outputType">输出类型</param>
/// <param name="isNullable">是否可空</param>
/// <param name="query">查询表达式</param>
/// <param name="order">排序表达式</param>
/// <param name="region">查询范围</param>
/// <param name="distinct">是否排除重复</param>
/// <param name="level">安全级别</param>
/// <returns>数据集合</returns>
internal IList QueryColumeList(DataFieldInfo fieldInfo, Type outputType, bool isNullable, QueryExpression query, OrderExpression order, Region region, bool distinct, SafeLevel level)
{
using (IDbCommand command = _dataBase.Factory.CreateSelectSingleFieldCommand(fieldInfo, query, order, distinct, null))
{
DataDefine define = TransferDataDefine(outputType, null, isNullable);
IList items = CreateList(define.ObjectType);
IEnumerable ie = QueryDataReader(define, command, region, level);
if (define.IsNullable)
{
MethodInfo addMethod = items.GetType().GetMethod("Add");
foreach (object obj in ie)
{
if (Object.Equals(obj, null))
{
addMethod.Invoke(items, new object[] { null });
}
else
{
items.Add(obj);
}
}
}
else
{
foreach (object obj in ie)
{
items.Add(obj);
}
}
return(items);
}
}
void LoadNormal()
{
List <DataFieldInfo> rootInfoList = new List <DataFieldInfo>();
Selector dataSelector = new Selector();
foreach (DataFieldMapping fieldMapping in this.rootMapping.DataEntityFields)
{
if (fieldMapping != null)
{
DataFieldInfo field = new DataFieldInfo(fieldMapping);
fieldInfoDict.Add(string.Format("{0}.{1}", string.Empty, fieldMapping.IndexName), field);
rootInfoList.Add(field);
dataSelector.SetSelectField(field);
}
}
tableInfoDict.Add(string.Empty, rootInfoList.ToArray());
string path = string.Empty;
foreach (CollectionRelationFieldMapping collectFieldMapping in rootMapping.CollectionRelationFieldMappings)
{
RelationKey[] kps = collectFieldMapping.GetKeyPairs();
string[] masters = new string[kps.Length];
for (int i = 0; i < kps.Length; i++)
{
masters[i] = string.Format("{0}.{1}", path, kps[i].MasterKey);
}
string collectField = string.Format("{0}.{1}", path, collectFieldMapping.FieldName);
collectionDict.Add(collectField, masters);
}
this.selector = dataSelector;
}
public override DataFieldInfo GetDataFieldInfo(string fullPath)
{
int index = fullPath.IndexOf(".", StringComparison.Ordinal);
if (index < 0)
{
if (mapDict.TryGetValue(fullPath, out IMap map1))
{
DataFieldInfo info = map1.GetFieldInfoForPath(fullPath);
string aliasTableName = aliasDict[fullPath];
info = info.CreateAliasTableInfo(aliasTableName);
return(info);
}
throw new LambdaParseException(LambdaParseMessage.ExpressionFieldPathError, fullPath);
}
string name = fullPath.Substring(0, index);
string path = fullPath.Substring(index);
if (mapDict.TryGetValue(name, out IMap map))
{
DataFieldInfo info = map.GetFieldInfoForPath(path);
string aliasTableName = aliasDict[name];
info = info.CreateAliasTableInfo(aliasTableName);
return(info);
}
else
{
throw new LambdaParseException(LambdaParseMessage.ExpressionFieldPathNotExists, fullPath);
}
}
public ISelector CreateSelector(string [] paths)
{
var selector = new Selector();
foreach (var path in paths)
{
var name = path.StartsWith(".", StringComparison.Ordinal) ? path.Substring(1) : path;
if (name == string.Empty)
{
var nameInfos = _model.GetDataFieldInfos();
foreach (var fieldInfo in nameInfos)
{
selector.SetSelectField(fieldInfo);
}
}
else
{
var info = _model.GetFieldData(name);
if (!Equals(info, null))
{
var nameInfo = new DataFieldInfo(info.TableMapping, false, name);
selector.SetSelectField(nameInfo);
}
else
{
throw new LightDataException(string.Format(SR.CanNotFindTheSpecifiedFieldViaPath, path));
}
}
}
return(selector);
}
public void AddGroupByField(string name, DataFieldInfo fieldInfo)
{
_hasGroupBy = true;
var agg = new AggregateDataFieldInfo(fieldInfo, name, false);
_aggregateDict.Add(name, agg);
}
/// <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);
}
private void LoadNormal()
{
var rootInfoList = new List <DataFieldInfo>();
var dataSelector = new Selector();
foreach (var fieldMapping in RootMapping.DataEntityFields)
{
if (fieldMapping != null)
{
var field = new DataFieldInfo(fieldMapping);
fieldInfoDict.Add($"{string.Empty}.{fieldMapping.IndexName}", field);
rootInfoList.Add(field);
dataSelector.SetSelectField(field);
}
}
tableInfoDict.Add(string.Empty, rootInfoList.ToArray());
var path = string.Empty;
foreach (var collectFieldMapping in RootMapping.CollectionRelationFieldMappings)
{
var kps = collectFieldMapping.GetKeyPairs();
var masters = new string[kps.Length];
for (var i = 0; i < kps.Length; i++)
{
masters[i] = $"{path}.{kps[i].MasterKey}";
}
var collectField = $"{path}.{collectFieldMapping.FieldName}";
collectionDict.Add(collectField, masters);
}
selector = dataSelector;
}
/// <summary>
/// 查询单列数据
/// </summary>
/// <param name="fieldInfo">字段信息</param>
/// <param name="outputType">输出类型</param>
/// <param name="isNullable">是否可空</param>
/// <param name="query">查询表达式</param>
/// <param name="order">排序表达式</param>
/// <param name="region">查询范围</param>
/// <param name="distinct">是否排除重复</param>
/// <param name="level">安全级别</param>
/// <returns>单列数据枚举</returns>
internal IEnumerable QueryColumeEnumerable(DataFieldInfo fieldInfo, Type outputType, bool isNullable, QueryExpression query, OrderExpression order, Region region, bool distinct, SafeLevel level)
{
IDbCommand command = _dataBase.Factory.CreateSelectSingleFieldCommand(fieldInfo, query, order, distinct, null);
DataDefine define = TransferDataDefine(outputType, null, isNullable);
return(QueryDataReader(define, command, region, level));
}
/// <summary>
/// 查询单列字段的数据
/// </summary>
/// <param name="fieldInfo">字段</param>
/// <param name="isDistinct">是否去重</param>
/// <returns>数据枚举</returns>
public IEnumerable QuerySingleField(DataFieldInfo fieldInfo, bool isDistinct)
{
if (!_mapping.Equals(fieldInfo.DataField.TypeMapping))
{
throw new LightDataException(RE.FieldIsNotMatchDataMapping);
}
return(_context.QueryColumeEnumerable(fieldInfo, _query, _order, _region, isDistinct, _level));
}
public virtual void SetSelectField(DataFieldInfo field)
{
if (Equals(field, null))
{
throw new ArgumentNullException(nameof(field));
}
selectList.Add(field);
}
public LightSubQueryDataFieldInfo(DataEntityMapping mapping, DataFieldInfo field, DataFieldInfo selectField, QueryCollectionPredicate predicate, QueryExpression expression)
: base(mapping)
{
_field = field;
_selectField = selectField;
_predicate = predicate;
_expression = expression;
}
/// <summary>
/// 统计最小值
/// </summary>
/// <param name="fieldInfo">统计字段</param>
/// <returns>函数对象</returns>
public static AggregateFunction Min(DataFieldInfo fieldInfo)
{
if (Object.Equals(fieldInfo, null))
{
throw new ArgumentNullException("fieldInfo");
}
return(new MinFunction(fieldInfo.TableMapping, fieldInfo));
}
/// <summary>
/// 对字段进行平均值统计
/// </summary>
/// <param name="fieldInfo">统计字段</param>
/// <param name="isDistinct">是否去重复</param>
/// <returns>函数对象</returns>
public static AggregateFunction Avg(DataFieldInfo fieldInfo, bool isDistinct)
{
if (Object.Equals(fieldInfo, null))
{
throw new ArgumentNullException("fieldInfo");
}
return(new AvgFunction(fieldInfo.TableMapping, fieldInfo, isDistinct));
}
public void SetInsertField(DataFieldInfo field)
{
if (Equals(field, null))
{
throw new ArgumentNullException(nameof(field));
}
insertList.Add(field);
}
/// <summary>
/// 查询单列字段的数据
/// </summary>
/// <typeparam name="K">输出字段类型,必须为原始数据类型</typeparam>
/// <param name="fieldInfo">字段</param>
/// <param name="isNullable">是否可空</param>
/// <param name="isDistinct">是否去重</param>
/// <returns>数据集合</returns>
public IList QuerySingleFieldList <K> (DataFieldInfo fieldInfo, bool isNullable, bool isDistinct)
{
if (!_mapping.Equals(fieldInfo.DataField.TypeMapping))
{
throw new LightDataException(RE.FieldIsNotMatchDataMapping);
}
return(_context.QueryColumeList(fieldInfo, typeof(K), isNullable, _query, _order, _region, isDistinct, _level));
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="dataField">要更新的数据字段</param>
/// <param name="value">更新值</param>
public UpdateSetValue(DataFieldInfo dataField, object value)
{
if (Object.Equals(dataField, null))
{
throw new ArgumentNullException("DataField");
}
_dataField = dataField;
_value = value;
}
public LightContainsDataFieldInfo(DataFieldInfo info, object collection)
: base(info.TableMapping)
{
if (collection == null)
{
throw new ArgumentNullException(nameof(collection));
}
this._collection = collection;
this._baseFieldInfo = info;
}
public virtual DataFieldInfo [] GetDataFieldInfos()
{
DataFieldInfo [] infos = new DataFieldInfo [_selectDict.Count];
int index = 0;
foreach (KeyValuePair <string, DataFieldInfo> kvp in _selectDict)
{
infos [index] = kvp.Value;
index++;
}
return(infos);
}
public DataFieldInfo [] GetDataFieldInfos()
{
var infos = new DataFieldInfo [_selectDict.Count];
var index = 0;
foreach (var kvp in _selectDict)
{
infos [index] = kvp.Value;
index++;
}
return(infos);
}
public DataFieldInfoRelation [] CreateDataFieldInfoRelations(string masterAlias, string relateAlias)
{
InitialRelateMapping();
DataFieldInfoRelation [] array = new DataFieldInfoRelation [keyPairs.Length];
for (int i = 0; i < keyPairs.Length; i++)
{
DataFieldInfo masterField = new DataFieldInfo(this.masterFieldMappings [i], masterAlias);
DataFieldInfo relateField = new DataFieldInfo(this.relateFieldMappings [i], relateAlias);
array [i] = new DataFieldInfoRelation(masterField, relateField);
}
return(array);
}
public void AddSelectField(string name, DataFieldInfo fieldInfo)
{
if (name != fieldInfo.FieldName)
{
SpecifiedDataFieldInfo selectInfo = new SpecifiedDataFieldInfo(fieldInfo, name);
_selectDict.Add(name, selectInfo);
}
else
{
_selectDict.Add(name, fieldInfo);
}
}
/// <summary>
/// 匹配细节内容是否相等
/// </summary>
/// <param name="info">匹配对象</param>
/// <returns></returns>
protected override bool EqualsDetail(DataFieldInfo info)
{
if (base.EqualsDetail(info))
{
ExtendDataFieldInfo target = info as ExtendDataFieldInfo;
return(this._baseFieldInfo.Equals(target._baseFieldInfo));
}
else
{
return(false);
}
}
public virtual QueryCommand Aggregate(DataContext context, DataFieldInfo field, AggregateType aggregateType, QueryExpression query, bool distinct)
{
CreateSqlState state = new CreateSqlState(context);
CommandData commandData = _factory.CreateAggregateFunctionCommand(field, aggregateType, query, distinct, state);
DbCommand command = commandData.CreateCommand(this, state);
QueryCommand queryCommand = new QueryCommand()
{
Command = command,
InnerPage = commandData.InnerPage
};
return(queryCommand);
}
public virtual QueryCommand QuerySingleField(DataContext context, DataFieldInfo fieldInfo, QueryExpression query, OrderExpression order, bool distinct, Region region)
{
CreateSqlState state = new CreateSqlState(context);
CommandData commandData = _factory.CreateSelectSingleFieldCommand(fieldInfo, query, order, distinct, region, state);
DbCommand command = commandData.CreateCommand(this, state);
QueryCommand queryCommand = new QueryCommand()
{
Command = command,
InnerPage = commandData.InnerPage
};
return(queryCommand);
}
public void SetDataField(DataFieldInfo field)
{
if (Object.Equals(field, null))
{
throw new ArgumentNullException(nameof(field));
}
AliasDataFieldInfo aliasField = new AliasDataFieldInfo(field, field.FieldName);
this.infoDict [aliasField.AliasName] = aliasField;
if (field.AliasTableName != null)
{
aliasTableHash.Add(field.AliasTableName);
}
}
/// <summary>
/// 从自增ID获取数据对象
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="id">自增</param>
/// <returns>数据对象</returns>
private T SelectSingleFromIdObj <T>(object id)
where T : class, new()
{
DataTableEntityMapping dtmapping = DataMapping.GetTableMapping(typeof(T));
if (dtmapping.IdentityField == null)
{
throw new LightDataException(RE.DataTableNotIdentityField);
}
DataFieldInfo idfield = new DataFieldInfo(dtmapping.IdentityField);
QueryExpression query = idfield == id;
return(SelectSingle(dtmapping, query, null, 0, SafeLevel.None) as T);
}
private DataFieldInfo[] GetFieldInfoForSingleField(string path)
{
if (singleDict.TryGetValue(path, out var fields))
{
var infos = new DataFieldInfo[fields.Length];
for (var i = 0; i < fields.Length; i++)
{
infos[i] = GetFieldInfoForField(fields[i]);
}
return(infos);
}
throw new LightDataException(string.Format(SR.CanNotFindTheSpecifiedFieldViaPath, path));
}
/// <summary>
/// 对字段进行平均值条件统计
/// </summary>
/// <param name="expression">条件表达式</param>
/// <param name="fieldInfo">统计字段</param>
/// <param name="isDistinct">是否去重复</param>
/// <returns>函数对象</returns>
public static AggregateFunction Avg(QueryExpression expression, DataFieldInfo fieldInfo, bool isDistinct)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
if (Object.Equals(fieldInfo, null))
{
throw new ArgumentNullException("fieldInfo");
}
if (!expression.IgnoreConsistency && !fieldInfo.TableMapping.Equals(expression.TableMapping))
{
throw new LightDataException(RE.DataMappingIsNotMatchQueryExpression);
}
return(new ConditionAvgFunction(fieldInfo.TableMapping, expression, fieldInfo, isDistinct));
}
public void SetDataEntity(DataEntityMapping entityMapping)
{
if (entityMapping == null)
{
throw new ArgumentNullException(nameof(entityMapping));
}
foreach (DataFieldMapping fieldMapping in entityMapping.DataEntityFields)
{
if (fieldMapping != null)
{
DataFieldInfo field = new DataFieldInfo(fieldMapping);
AliasDataFieldInfo aliasField = new AliasDataFieldInfo(field, field.FieldName);
this.infoDict [aliasField.AliasName] = aliasField;
}
}
}
public static JoinSelector ComposeSelector(Dictionary <string, Selector> selectors)
{
JoinSelector joinSelector = new JoinSelector();
foreach (KeyValuePair <string, Selector> selector in selectors)
{
foreach (DataFieldInfo item in selector.Value.selectList)
{
DataFieldInfo info = item;
string aliasName = string.Format("{0}_{1}", selector.Key, info.FieldName);
AliasDataFieldInfo alias = new AliasDataFieldInfo(info, aliasName, selector.Key);
//alias.AliasTableName = selector.Key;
joinSelector.SetAliasDataField(alias);
}
}
return(joinSelector);
}
