/// <summary>
/// Gets a column value by the index
/// </summary>
/// <param name="mapping"></param>
/// <param name="dataReader"></param>
/// <returns></returns>
public override object GetValueByIndex(ResultProperty mapping, IDataReader dataReader)
{
return(DBNull.Value);
}
set => SetValue(ResultProperty, value);
/// <summary> /// Gets a column value by the index /// </summary> /// <param name="mapping"></param> /// <param name="dataReader"></param> /// <returns></returns> public abstract object GetValueByIndex(ResultProperty mapping, IDataReader dataReader);
/// <summary>
/// Sets the value to the result property.
/// </summary>
/// <param name="mapping"></param>
/// <param name="target"></param>
/// <param name="dataBaseValue"></param>
public override void SetData(ref object target, ResultProperty mapping, object dataBaseValue)
{
((IDictionary)target).Add(mapping.PropertyName, dataBaseValue);
}
/// <summary>
/// Builds the the iBATIS core model (statement, alias, resultMap, parameterMap, dataSource)
/// from an <see cref="IConfigurationStore"/> and store all the refrences in an <see cref="IModelStore"/> .
/// </summary>
/// <param name="configurationSetting">The configuration setting.</param>
/// <param name="store">The configuration store.</param>
/// <returns>The model store</returns>
public virtual void BuildModel(ConfigurationSetting configurationSetting, IConfigurationStore store)
{
IObjectFactory objectFactory = null;
IGetAccessorFactory getAccessorFactory = null;
ISetAccessorFactory setAccessorFactory = null;
ISessionFactory sessionFactory = null;
ISessionStore sessionStore = null;
if (configurationSetting != null)
{
objectFactory = configurationSetting.ObjectFactory;
setAccessorFactory = configurationSetting.SetAccessorFactory;
getAccessorFactory = configurationSetting.GetAccessorFactory;
dataSource = configurationSetting.DataSource;
sessionFactory = configurationSetting.SessionFactory;
sessionStore = configurationSetting.SessionStore;
dynamicSqlEngine = configurationSetting.DynamicSqlEngine;
isCacheModelsEnabled = configurationSetting.IsCacheModelsEnabled;
useStatementNamespaces = configurationSetting.UseStatementNamespaces;
useReflectionOptimizer = configurationSetting.UseReflectionOptimizer;
preserveWhitespace = configurationSetting.PreserveWhitespace;
}
// Xml setting override code setting
//取store中的数据初始化类成员 为下面做准备
LoadSetting(store);
if (objectFactory == null)
{
objectFactory = new ObjectFactory(useReflectionOptimizer);
}
if (setAccessorFactory == null)
{
setAccessorFactory = new SetAccessorFactory(useReflectionOptimizer);
}
if (getAccessorFactory == null)
{
getAccessorFactory = new GetAccessorFactory(useReflectionOptimizer);
}
AccessorFactory accessorFactory = new AccessorFactory(setAccessorFactory, getAccessorFactory);
TypeHandlerFactory typeHandlerFactory = new TypeHandlerFactory();
TypeAlias alias = new TypeAlias("MEMORY", typeof(PerpetualCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("Perpetual", typeof(PerpetualCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("LRU", typeof(LruCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("Lru", typeof(LruCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("FIFO", typeof(FifoCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("Fifo", typeof(FifoCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("Weak", typeof(WeakCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("WEAK", typeof(WeakCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("MemCached", typeof(MemCached));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("MEMCACHED", typeof(MemCached));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("AnsiStringTypeHandler", typeof(AnsiStringTypeHandler));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
//将以上类信息存入到modelStore中 实质性工作
modelStore.DataExchangeFactory = new DataExchangeFactory(typeHandlerFactory, objectFactory, accessorFactory);
if (sessionStore == null)
{
sessionStore = SessionStoreFactory.GetSessionStore(modelStore.Id);
}
//将ISessionStore类对象存入modelStore中 准备数据库的连接 与 事物操作功能 实质性工作
modelStore.SessionStore = sessionStore;
//初始化DefaultModelBuilder的成员变量
deSerializerFactory = new DeSerializerFactory(modelStore);
//设置一个空类型的参数映射类
ParameterMap emptyParameterMap = new ParameterMap(
ConfigConstants.EMPTY_PARAMETER_MAP,
string.Empty,
string.Empty,
typeof(string),
modelStore.DataExchangeFactory.GetDataExchangeForClass(null), //获得ComplexDataExchange对象
false);
//向参数字典中添加一个空参数类
modelStore.AddParameterMap(emptyParameterMap);
//完成了对DefaultModelBuilder成员变量dbProviderFactory的初始化，其中完成了对provider使用中节点的类初始化
BuildProviders(store);
//完成了对DefaultModelBuilder成员变量IDataSource的初始化,包括数据库的名字 连接字符串 以及DbPrivder类
BuildDataSource(store);
if (sessionFactory == null)
{
sessionFactory = new DefaultSessionFactory(
dataSource,
modelStore.SessionStore,
new DefaultTransactionManager(new AdoTransactionFactory()));
}
//初始化modelStore中的ISessionFactory变量
modelStore.SessionFactory = sessionFactory;
//将具体SQLXML配置文件中的Alias节点对应的别名信息写入到modelStore中的TypeHandlerFactory的字典中
BuildTypeAlias(store);
//将TypeHanders下的子节点信息放入 modelStore.DataExchangeFactory.TypeHandlerFactory中的字典当中
BuildTypeHandlers(store);
//将cacheModels下子节点cacheModel加入到modelStore的CacheModel字典中
BuildCacheModels(store);
//将resultMap节点信息添加到modelStore的resultMaps中
BuildResultMaps(store);
//为resultMapping属性所在的节点信息类设置对应的ResultProperty
for (int i = 0; i < nestedProperties.Count; i++)
{
ResultProperty property = nestedProperties[i];
property.NestedResultMap = modelStore.GetResultMap(property.NestedResultMapName);
}
for (int i = 0; i < discriminators.Count; i++)
{
//完成对discriminator类中对字典的初始化
discriminators[i].Initialize(modelStore);
}
//将parameter节点信息添加到modelStore类中的parameterMaps字典中
BuildParameterMaps(store);
//将statements下的节点添加到modelStore的statements的字典中
BuildMappedStatements(store, configurationSetting);
for (int i = 0; i < store.CacheModels.Length; i++)
{
CacheModel cacheModel = modelStore.GetCacheModel(store.CacheModels[i].Id);
for (int j = 0; j < cacheModel.StatementFlushNames.Count; j++)
{
string statement = cacheModel.StatementFlushNames[j];
IMappedStatement mappedStatement = modelStore.GetMappedStatement(statement);
if (mappedStatement != null)
{
//为IMappedStatement类的Executed制定委托事件 目的是清空缓存
cacheModel.RegisterTriggerStatement(mappedStatement);
if (logger.IsDebugEnabled)
{
logger.Debug("Registering trigger statement [" + statement + "] to cache model [" + cacheModel.Id + "]");
}
}
else
{
if (logger.IsWarnEnabled)
{
logger.Warn("Unable to register trigger statement [" + statement + "] to cache model [" + cacheModel.Id + "]. Statement does not exist.");
}
}
}
}
if (logger.IsInfoEnabled)
{
logger.Info("Model Store");
logger.Info(modelStore.ToString());
}
}
/// <summary>
/// Sets value of the specified <see cref="ResultProperty"/> on the target object
/// when a 'resultMapping' attribute exists
/// on the <see cref="ResultProperty"/>.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="resultMap">The result map.</param>
/// <param name="mapping">The ResultProperty.</param>
/// <param name="target">The target.</param>
/// <param name="reader">The reader.</param>
/// <param name="keys">The keys</param>
public void Set(RequestScope request, IResultMap resultMap,
ResultProperty mapping, ref object target, IDataReader reader, object keys)
{
Get(request, resultMap, mapping, ref target, reader);
}
/// <summary> /// Sets the value to the result property. /// </summary> /// <param name="mapping"></param> /// <param name="target"></param> /// <param name="dataBaseValue"></param> public abstract void SetData(ref object target, ResultProperty mapping, object dataBaseValue);
/// <summary>
///
/// </summary>
/// <param name="mapping"></param>
/// <param name="dataReader"></param>
/// <returns></returns>
public override object GetValueByName(ResultProperty mapping, IDataReader dataReader)
{
int index = dataReader.GetOrdinal(mapping.ColumnName);
return(dataReader.IsDBNull(index) ? (object)DBNull.Value : dataReader.GetDecimal(index));
}
/// <summary>
/// Processes the specified <see cref="IDataReader"/>.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="reader">The reader.</param>
/// <param name="resultObject">The result object.</param>
/// <returns></returns>
public object Process(RequestScope request, ref IDataReader reader, object resultObject)
{
IResultMap resultMap = request.CurrentResultMap.ResolveSubMap(reader);
DataRow dataRow = (DataRow)resultObject;
DataTable dataTable = dataRow.Table;
if (dataTable.Columns.Count == 0)
{
// Builds and adss the columns
dataTable.TableName = resultMap.Id;
if (resultMap is AutoResultMap)
{
for (int index = 0; index < reader.FieldCount; index++)
{
string columnName = reader.GetName(index);
Type type = reader.GetFieldType(index);
DataColumn column = new DataColumn();
column.DataType = type;
column.ColumnName = columnName;
dataTable.Columns.Add(column);
}
}
else
{
for (int index = 0; index < resultMap.Properties.Count; index++)
{
ResultProperty property = resultMap.Properties[index];
DataColumn column = new DataColumn();
if (property.CLRType.Length > 0)
{
column.DataType = request.DataExchangeFactory.TypeHandlerFactory.GetType(property.CLRType);
}
else
{
object value = property.GetDataBaseValue(reader);
if (value == null)
{
int columnIndex = reader.GetOrdinal(property.ColumnName);
column.DataType = reader.GetFieldType(columnIndex);
}
else
{
column.DataType = value.GetType();
}
}
column.ColumnName = property.PropertyName;
dataTable.Columns.Add(column);
}
}
}
if (resultMap is AutoResultMap)
{
for (int index = 0; index < reader.FieldCount; index++)
{
string propertyName = reader.GetName(index);
int columnIndex = index;
ITypeHandler typeHandler = request.DataExchangeFactory.TypeHandlerFactory.GetTypeHandler(reader.GetFieldType(index));
ResultProperty property = new ResultProperty(
propertyName,
string.Empty,
columnIndex,
string.Empty,
string.Empty,
string.Empty,
false,
string.Empty,
null,
string.Empty,
typeof(DataRow),
request.DataExchangeFactory,
typeHandler);
object value = property.GetDataBaseValue(reader);
if (value == null)
{
value = DBNull.Value;
}
dataRow[property.PropertyName] = value;
}
}
else
{
for (int index = 0; index < resultMap.Properties.Count; index++)
{
ResultProperty property = resultMap.Properties[index];
object value = property.GetDataBaseValue(reader);
if (value == null)
{
value = DBNull.Value;
}
dataRow[property.PropertyName] = value;
}
}
return(null);
}
/// <summary>
/// Sets the value to the result property.
/// </summary>
/// <param name="mapping"></param>
/// <param name="target"></param>
/// <param name="dataBaseValue"></param>
public override void SetData(ref object target, ResultProperty mapping, object dataBaseValue)
{
target = dataBaseValue;
}
public static ResultPropertyCollection Build(DataExchangeFactory dataExchangeFactory, IDataReader reader, ref object resultObject)
{
Type type = resultObject.GetType();
ResultPropertyCollection propertys = new ResultPropertyCollection();
try
{
string[] writeableMemberNames = ReflectionInfo.GetInstance(type).GetWriteableMemberNames();
Hashtable hashtable = new Hashtable();
int length = writeableMemberNames.Length;
for (int i = 0; i < length; i++)
{
ISetAccessor accessor = dataExchangeFactory.AccessorFactory.SetAccessorFactory.CreateSetAccessor(type, writeableMemberNames[i]);
hashtable.Add(writeableMemberNames[i], accessor);
}
DataTable schemaTable = reader.GetSchemaTable();
int count = schemaTable.Rows.Count;
for (int j = 0; j < count; j++)
{
string memberName = schemaTable.Rows[j][0].ToString();
ISetAccessor setAccessor = hashtable[memberName] as ISetAccessor;
ResultProperty property = new ResultProperty {
ColumnName = memberName,
ColumnIndex = j
};
if (resultObject is Hashtable)
{
property.PropertyName = memberName;
propertys.Add(property);
}
Type memberTypeForSetter = null;
if (setAccessor == null)
{
try
{
memberTypeForSetter = ObjectProbe.GetMemberTypeForSetter(resultObject, memberName);
}
catch
{
_logger.Error("The column [" + memberName + "] could not be auto mapped to a property on [" + resultObject.ToString() + "]");
}
}
else
{
memberTypeForSetter = setAccessor.MemberType;
}
if ((memberTypeForSetter != null) || (setAccessor != null))
{
property.PropertyName = (setAccessor != null) ? setAccessor.Name : memberName;
if (setAccessor != null)
{
property.Initialize(dataExchangeFactory.TypeHandlerFactory, setAccessor);
}
else
{
property.TypeHandler = dataExchangeFactory.TypeHandlerFactory.GetTypeHandler(memberTypeForSetter);
}
property.PropertyStrategy = PropertyStrategyFactory.Get(property);
propertys.Add(property);
}
}
}
catch (Exception exception)
{
throw new DataMapperException("Error automapping columns. Cause: " + exception.Message, exception);
}
return(propertys);
}
public void Set(RequestScope request, IResultMap resultMap, ResultProperty mapping, ref object target, IDataReader reader, object keys)
{
object dataBaseValue = this.Get(request, resultMap, mapping, ref target, reader);
resultMap.SetValueOfProperty(ref target, mapping, dataBaseValue);
}
/// <summary>
/// Stores ResultProperty from which the NestedResultMap property must be resolved
/// Delay resolution until all the ResultMap are processed.
/// </summary>
/// <param name="property">The property.</param>
private void WaitResultPropertyResolution(ResultProperty property)
{
nestedProperties.Add(property);
}
/// <summary>
/// Builds the the iBATIS core model (statement, alias, resultMap, parameterMap, dataSource)
/// from an <see cref="IConfigurationStore"/> and store all the refrences in an <see cref="IModelStore"/> .
/// </summary>
/// <param name="configurationSetting">The configuration setting.</param>
/// <param name="store">The configuration store.</param>
/// <returns>The model store</returns>
public virtual void BuildModel(ConfigurationSetting configurationSetting, IConfigurationStore store)
{
IObjectFactory objectFactory = null;
IGetAccessorFactory getAccessorFactory = null;
ISetAccessorFactory setAccessorFactory = null;
ISessionFactory sessionFactory = null;
ISessionStore sessionStore = null;
if (configurationSetting != null)
{
objectFactory = configurationSetting.ObjectFactory;
setAccessorFactory = configurationSetting.SetAccessorFactory;
getAccessorFactory = configurationSetting.GetAccessorFactory;
dataSource = configurationSetting.DataSource;
sessionFactory = configurationSetting.SessionFactory;
sessionStore = configurationSetting.SessionStore;
dynamicSqlEngine = configurationSetting.DynamicSqlEngine;
isCacheModelsEnabled = configurationSetting.IsCacheModelsEnabled;
useStatementNamespaces = configurationSetting.UseStatementNamespaces;
useReflectionOptimizer = configurationSetting.UseReflectionOptimizer;
preserveWhitespace = configurationSetting.PreserveWhitespace;
}
// Xml setting override code setting
LoadSetting(store);
if (objectFactory == null)
{
objectFactory = new ObjectFactory(useReflectionOptimizer);
}
if (setAccessorFactory == null)
{
setAccessorFactory = new SetAccessorFactory(useReflectionOptimizer);
}
if (getAccessorFactory == null)
{
getAccessorFactory = new GetAccessorFactory(useReflectionOptimizer);
}
AccessorFactory accessorFactory = new AccessorFactory(setAccessorFactory, getAccessorFactory);
TypeHandlerFactory typeHandlerFactory = new TypeHandlerFactory();
TypeAlias alias = new TypeAlias("MEMORY", typeof(PerpetualCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("Perpetual", typeof(PerpetualCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("LRU", typeof(LruCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("Lru", typeof(LruCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("FIFO", typeof(FifoCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("Fifo", typeof(FifoCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("Weak", typeof(WeakCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("WEAK", typeof(WeakCache));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
alias = new TypeAlias("AnsiStringTypeHandler", typeof(AnsiStringTypeHandler));
typeHandlerFactory.AddTypeAlias(alias.Id, alias);
modelStore.DataExchangeFactory = new DataExchangeFactory(typeHandlerFactory, objectFactory, accessorFactory);
if (sessionStore == null)
{
sessionStore = SessionStoreFactory.GetSessionStore(modelStore.Id);
}
modelStore.SessionStore = sessionStore;
deSerializerFactory = new DeSerializerFactory(modelStore);
ParameterMap emptyParameterMap = new ParameterMap(
ConfigConstants.EMPTY_PARAMETER_MAP,
string.Empty,
string.Empty,
typeof(string),
modelStore.DataExchangeFactory.GetDataExchangeForClass(null),
false);
modelStore.AddParameterMap(emptyParameterMap);
BuildProviders(store);
BuildDataSource(store);
if (sessionFactory == null)
{
sessionFactory = new DefaultSessionFactory(
dataSource,
modelStore.SessionStore,
new DefaultTransactionManager(new AdoTransactionFactory()));
}
modelStore.SessionFactory = sessionFactory;
BuildTypeAlias(store);
BuildTypeHandlers(store);
BuildCacheModels(store);
BuildResultMaps(store);
for (int i = 0; i < nestedProperties.Count; i++)
{
ResultProperty property = nestedProperties[i];
property.NestedResultMap = modelStore.GetResultMap(property.NestedResultMapName);
}
for (int i = 0; i < discriminators.Count; i++)
{
discriminators[i].Initialize(modelStore);
}
BuildParameterMaps(store);
BuildMappedStatements(store, configurationSetting);
for (int i = 0; i < store.CacheModels.Length; i++)
{
CacheModel cacheModel = modelStore.GetCacheModel(store.CacheModels[i].Id);
for (int j = 0; j < cacheModel.StatementFlushNames.Count; j++)
{
string statement = cacheModel.StatementFlushNames[j];
IMappedStatement mappedStatement = modelStore.GetMappedStatement(statement);
if (mappedStatement != null)
{
cacheModel.RegisterTriggerStatement(mappedStatement);
if (logger.IsDebugEnabled)
{
logger.Debug("Registering trigger statement [" + statement + "] to cache model [" + cacheModel.Id + "]");
}
}
else
{
if (logger.IsWarnEnabled)
{
logger.Warn("Unable to register trigger statement [" + statement + "] to cache model [" + cacheModel.Id + "]. Statement does not exist.");
}
}
}
}
if (logger.IsInfoEnabled)
{
logger.Info("Model Store");
logger.Info(modelStore.ToString());
}
}
/// <summary>
/// Builds a <see cref="ResultPropertyCollection"/> for an <see cref="AutoResultMap"/>.
/// </summary>
/// <param name="dataExchangeFactory">The data exchange factory.</param>
/// <param name="reader">The reader.</param>
/// <param name="resultObject">The result object.</param>
public static ResultPropertyCollection Build <T>(DataExchangeFactory dataExchangeFactory,
IDataReader reader,
ref T resultObject)
{
Type targetType = resultObject.GetType();
ResultPropertyCollection properties = new ResultPropertyCollection();
try
{
// Get all PropertyInfo from the resultObject properties
var reflectionInfo = ReflectionInfo.GetInstance(targetType);
var membersName = reflectionInfo.GetWriteableMemberNames();
var propertyMap = new Hashtable();
int length = membersName.Length;
for (int i = 0; i < length; i++)
{
ISetAccessorFactory setAccessorFactory = dataExchangeFactory.AccessorFactory.SetAccessorFactory;
ISetAccessor setAccessor = setAccessorFactory.CreateSetAccessor(targetType, membersName[i]);
propertyMap.Add(membersName[i], setAccessor);
}
// Get all column Name from the reader
// and build a resultMap from with the help of the PropertyInfo[].
var dataColumn = reader.GetSchemaTable();
if (dataColumn == null)
{
return(new ResultPropertyCollection());
}
int count = dataColumn.Rows.Count;
for (int i = 0; i < count; i++)
{
var columnName = dataColumn.Rows[i][0].ToString();
var matchedSetAccessor = propertyMap[columnName] as ISetAccessor;
var property = new ResultProperty {
ColumnName = columnName, ColumnIndex = i
};
if (resultObject is Hashtable)
{
property.PropertyName = columnName;
properties.Add(property);
}
Type propertyType = null;
if (matchedSetAccessor == null)
{
try
{
propertyType = ObjectProbe.GetMemberTypeForSetter(resultObject, columnName);
}
catch
{
// ignored
}
}
else
{
propertyType = matchedSetAccessor.MemberType;
}
if (propertyType != null || matchedSetAccessor != null)
{
property.PropertyName = (matchedSetAccessor != null ? matchedSetAccessor.Name : columnName);
if (matchedSetAccessor != null)
{
property.Initialize(dataExchangeFactory.TypeHandlerFactory, matchedSetAccessor);
}
else
{
property.TypeHandler = dataExchangeFactory.TypeHandlerFactory.GetTypeHandler(propertyType);
}
property.PropertyStrategy = PropertyStrategyFactory.Get(property);
properties.Add(property);
}
}
}
catch (Exception e)
{
throw new DataMapperException("Error automapping columns. Cause: " + e.Message, e);
}
return(properties);
}
/// <summary>
/// Builds a <see cref="ResultPropertyCollection"/> for an <see cref="AutoResultMap"/>.
/// 根据reader的字段从resultObject类中获取对应的属性类集合
/// </summary>
/// <param name="dataExchangeFactory">The data exchange factory.</param>
/// <param name="reader">The reader.</param>
/// <param name="resultObject">The result object.</param>
public static ResultPropertyCollection Build(DataExchangeFactory dataExchangeFactory,
IDataReader reader,
ref object resultObject)
{
Type targetType = resultObject.GetType();
ResultPropertyCollection properties = new ResultPropertyCollection();
try
{
// Get all PropertyInfo from the resultObject properties
ReflectionInfo reflectionInfo = ReflectionInfo.GetInstance(targetType);
string[] membersName = reflectionInfo.GetWriteableMemberNames();
//为结果类resultObject的属性设置对应的访问与获取的函数类
IDictionary <string, ISetAccessor> propertyMap = new Dictionary <string, ISetAccessor>();
int length = membersName.Length;
for (int i = 0; i < length; i++)
{
ISetAccessorFactory setAccessorFactory = dataExchangeFactory.AccessorFactory.SetAccessorFactory;
ISetAccessor setAccessor = setAccessorFactory.CreateSetAccessor(targetType, membersName[i]);
propertyMap.Add(membersName[i], setAccessor);
}
// Get all column Name from the reader
// and build a resultMap from with the help of the PropertyInfo[].
DataTable dataColumn = reader.GetSchemaTable();
int count = dataColumn.Rows.Count;
for (int i = 0; i < count; i++)
{
string propertyName = string.Empty;
string columnName = dataColumn.Rows[i][0].ToString();
//获取当前列字段对应的设置访问类
ISetAccessor matchedSetAccessor = null;
propertyMap.TryGetValue(columnName, out matchedSetAccessor);
int columnIndex = i;
if (resultObject is Hashtable)
{
propertyName = columnName;
//将当前列字段信息转化为ResultProperty类
ResultProperty property = new ResultProperty(
propertyName,
columnName,
columnIndex,
string.Empty,
string.Empty,
string.Empty,
false,
string.Empty,
null,
string.Empty,
targetType,
dataExchangeFactory,
null);
properties.Add(property);
}
//获取当前列字段的类型
Type propertyType = null;
if (matchedSetAccessor == null)
{
try
{
propertyType = ObjectProbe.GetMemberTypeForSetter(resultObject, columnName);
}
catch
{
_logger.Error("The column [" + columnName + "] could not be auto mapped to a property on [" + resultObject + "]");
}
}
else
{
propertyType = matchedSetAccessor.MemberType;
}
//获取当前列字段的名称及对应的处理类
if (propertyType != null || matchedSetAccessor != null)
{
propertyName = (matchedSetAccessor != null ? matchedSetAccessor.Name : columnName);
ITypeHandler typeHandler = null;
if (matchedSetAccessor != null)
{
//property.Initialize(dataExchangeFactory.TypeHandlerFactory, matchedSetAccessor);
typeHandler = dataExchangeFactory.TypeHandlerFactory.GetTypeHandler(matchedSetAccessor.MemberType);
}
else
{
typeHandler = dataExchangeFactory.TypeHandlerFactory.GetTypeHandler(propertyType);
}
//property.PropertyStrategy = PropertyStrategyFactory.Get(property);
ResultProperty property = new ResultProperty(
propertyName,
columnName,
columnIndex,
string.Empty,
string.Empty,
string.Empty,
false,
string.Empty,
null,
string.Empty,
targetType,
dataExchangeFactory,
typeHandler);
properties.Add(property);
}
}
}
catch (Exception e)
{
throw new DataMapperException("Error automapping columns. Cause: " + e.Message, e);
}
return(properties);
}
/// <summary>
/// Gets the value of the specified <see cref="ResultProperty"/> that must be set on the target object.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="resultMap">The result map.</param>
/// <param name="mapping">The mapping.</param>
/// <param name="reader">The reader.</param>
/// <param name="target">The target object</param>
public object Get(RequestScope request, IResultMap resultMap, ResultProperty mapping, ref object target, IDataReader reader)
{
throw new NotSupportedException("Get method on ResultMapStrategy is not supported");
}
/// <summary>
/// Gets a column value by the name
/// </summary>
/// <param name="mapping"></param>
/// <param name="dataReader"></param>
/// <returns></returns>
public override object GetValueByName(ResultProperty mapping, IDataReader dataReader)
{
int index = dataReader.GetOrdinal(mapping.ColumnName);
return(GetValue(index, dataReader));
}
/// <summary>
/// Gets the value of the specified <see cref="ResultProperty"/> that must be set on the target object.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="resultMap">The result map.</param>
/// <param name="mapping">The mapping.</param>
/// <param name="reader">The reader.</param>
/// <param name="target">The target object</param>
public object Get(RequestScope request, IResultMap resultMap, ResultProperty mapping, ref object target, IDataReader reader)
{
// The property is a IList
IList list = null;
// Get the IList property
object property = ObjectProbe.GetMemberValue(target, mapping.PropertyName,
request.DataExchangeFactory.AccessorFactory);
if (property == null)// Create the list if need
{
property = mapping.ListFactory.CreateInstance(null);
mapping.SetAccessor.Set(target, property);
}
list = (IList)property;
object result = null;
IResultMap propertyRresultMap = mapping.NestedResultMap.ResolveSubMap(reader);
if (propertyRresultMap.GroupByProperties.Count > 0)
{
string uniqueKey = GetUniqueKey(propertyRresultMap, request, reader);
// Gets the [key, result object] already build
IDictionary buildObjects = request.GetUniqueKeys(propertyRresultMap);
if (buildObjects != null && buildObjects.Contains(uniqueKey))
{
// Unique key is already known, so get the existing result object and process additional results.
result = buildObjects[uniqueKey];
//In some cases (nested groupings) our object may be null, so there is
//no point in going on
if (result != null)
{
// process resulMapping attribute which point to a groupBy attribute
for (int index = 0; index < propertyRresultMap.Properties.Count; index++)
{
ResultProperty resultProperty = propertyRresultMap.Properties[index];
if (resultProperty.PropertyStrategy is PropertStrategy.GroupByStrategy)
{
resultProperty.PropertyStrategy.Set(request, propertyRresultMap, resultProperty, ref result, reader, null);
}
}
}
result = SKIP;
}
else if (uniqueKey == null || buildObjects == null || !buildObjects.Contains(uniqueKey))
{
// Unique key is NOT known, so create a new result object and then process additional results.
result = _resultMapStrategy.Get(request, resultMap, mapping, ref target, reader);
if (buildObjects == null)
{
buildObjects = new Hashtable();
request.SetUniqueKeys(propertyRresultMap, buildObjects);
}
buildObjects[uniqueKey] = result;
}
}
else // Last resultMap have no groupBy attribute
{
result = _resultMapStrategy.Get(request, resultMap, mapping, ref target, reader);
}
if ((result != null) && (result != SKIP))
{
list.Add(result);
}
return(result);
}
/// <summary>
/// Gets a column value by the index
/// </summary>
/// <param name="mapping"></param>
/// <param name="dataReader"></param>
/// <returns></returns>
public override object GetValueByIndex(ResultProperty mapping, IDataReader dataReader)
{
return(GetValue(mapping.ColumnIndex, dataReader));
}
/// <summary>
/// Sets the value to the result property.
/// </summary>
/// <param name="mapping"></param>
/// <param name="target"></param>
/// <param name="dataBaseValue"></param>
public override void SetData(ref object target, ResultProperty mapping, object dataBaseValue)
{
ObjectProbe.SetMemberValue(target, mapping.PropertyName, dataBaseValue,
DataExchangeFactory.ObjectFactory,
DataExchangeFactory.AccessorFactory);
}
/// <summary>
/// Processes the specified <see cref="IDataReader"/>
/// when no resultClass or resultMap attribute are specified.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="reader">The reader.</param>
/// <param name="resultObject">The result object.</param>
/// <returns></returns>
public object Process(RequestScope request, ref IDataReader reader, object resultObject)
{
object outObject = resultObject;
if (reader.FieldCount == 1)
{
const string propertyName = "value";
const int columnIndex = 0;
ITypeHandler typeHandler = request.DataExchangeFactory.TypeHandlerFactory.GetTypeHandler(reader.GetFieldType(0));
ResultProperty property = new ResultProperty(
propertyName,
string.Empty,
columnIndex,
string.Empty,
string.Empty,
string.Empty,
false,
string.Empty,
null,
string.Empty,
null,
request.DataExchangeFactory,
typeHandler);
//ResultProperty property = new ResultProperty();
//property.PropertyName = "value";
//property.ColumnIndex = 0;
//property.TypeHandler = request.DataExchangeFactory.TypeHandlerFactory.GetTypeHandler(reader.GetFieldType(0));
outObject = property.GetDataBaseValue(reader);
}
else if (reader.FieldCount > 1)
{
object[] newOutObject = new object[reader.FieldCount];
int count = reader.FieldCount;
for (int i = 0; i < count; i++)
{
const string propertyName = "value";
int columnIndex = i;
ITypeHandler typeHandler = request.DataExchangeFactory.TypeHandlerFactory.GetTypeHandler(reader.GetFieldType(i));
ResultProperty property = new ResultProperty(
propertyName,
string.Empty,
columnIndex,
string.Empty,
string.Empty,
string.Empty,
false,
string.Empty,
null,
string.Empty,
null,
request.DataExchangeFactory,
typeHandler);
//ResultProperty property = new ResultProperty();
//property.PropertyName = "value";
//property.ColumnIndex = i;
//property.TypeHandler = request.DataExchangeFactory.TypeHandlerFactory.GetTypeHandler(reader.GetFieldType(i));
newOutObject[i] = property.GetDataBaseValue(reader);
}
outObject = newOutObject;
}
//else
//{
// // do nothing if 0 fields
//}
return(outObject);
}
/// <summary>
/// Gets a column value by the index
/// </summary>
/// <param name="mapping"></param>
/// <param name="dataReader"></param>
/// <returns></returns>
public override object GetValueByIndex(ResultProperty mapping, IDataReader dataReader)
{
IResultGetter getter = new ResultGetterImpl(dataReader, mapping.ColumnIndex);
return(_callback.GetResult(getter));
}
/// <summary>
/// Builds a <see cref="ResultPropertyCollection"/> for an <see cref="AutoResultMap"/>.
/// </summary>
/// <param name="dataExchangeFactory">The data exchange factory.</param>
/// <param name="reader">The reader.</param>
/// <param name="resultObject">The result object.</param>
/// <param name="isUseAutoMapCompatibilityMode">The result object.</param>
public static ResultPropertyCollection Build(DataExchangeFactory dataExchangeFactory,
IDataReader reader,
ref object resultObject,
bool isUseAutoMapCompatibilityMode)
{
Type targetType = resultObject.GetType();
ResultPropertyCollection properties = new ResultPropertyCollection();
try
{
// Get all PropertyInfo from the resultObject properties
ReflectionInfo reflectionInfo = ReflectionInfo.GetInstance(targetType);
string[] membersName = reflectionInfo.GetPublicWriteableMemberNames();
Hashtable propertyMap = new Hashtable();
int length = membersName.Length;
for (int i = 0; i < length; i++)
{
var memberName = membersName[i];
ISetAccessorFactory setAccessorFactory = dataExchangeFactory.AccessorFactory.SetAccessorFactory;
ISetAccessor setAccessor = setAccessorFactory.CreateSetAccessor(targetType, memberName);
var menberInfo = reflectionInfo.GetSetter(memberName);
//ʹ�ñ�ע������Ϊ�к����ԵĹ�ϵ
var attrs = menberInfo.GetCustomAttribute <AliasAttribute>();
if (attrs != null)
{
memberName = attrs.Name;
}
else if (isUseAutoMapCompatibilityMode)//���ü���ģʽ
{
memberName = memberName.Replace("_", "").ToLower();
}
propertyMap.Add(memberName, setAccessor);
}
// Get all column Name from the reader
// and build a resultMap from with the help of the PropertyInfo[].
DataTable dataColumn = reader.GetSchemaTable();
int count = dataColumn.Rows.Count;
for (int i = 0; i < count; i++)
{
string columnName = dataColumn.Rows[i][0].ToString();
ISetAccessor matchedSetAccessor = propertyMap[columnName] as ISetAccessor;
if (matchedSetAccessor == null && isUseAutoMapCompatibilityMode)
{
columnName = columnName.Replace("_", "").ToLower();
matchedSetAccessor = propertyMap[columnName] as ISetAccessor;
}
ResultProperty property = new ResultProperty();
property.ColumnName = columnName;
property.ColumnIndex = i;
if (resultObject is Hashtable)
{
property.PropertyName = columnName;
properties.Add(property);
}
Type propertyType = null;
if (matchedSetAccessor == null)
{
try
{
propertyType = ObjectProbe.GetMemberTypeForSetter(resultObject, columnName);
}
catch
{
_logger.Error("The column [" + columnName + "] could not be auto mapped to a property on [" + resultObject.ToString() + "]");
}
}
else
{
propertyType = matchedSetAccessor.MemberType;
}
if (propertyType != null || matchedSetAccessor != null)
{
property.PropertyName = (matchedSetAccessor != null ? matchedSetAccessor.Name : columnName);
if (matchedSetAccessor != null)
{
property.Initialize(dataExchangeFactory.TypeHandlerFactory, matchedSetAccessor);
}
else
{
property.TypeHandler = dataExchangeFactory.TypeHandlerFactory.GetTypeHandler(propertyType);
}
property.PropertyStrategy = PropertyStrategyFactory.Get(property);
properties.Add(property);
}
}
}
catch (Exception e)
{
throw new DataMapperException("Error automapping columns. Cause: " + e.Message, e);
}
return(properties);
}
