///<summary>
/// Sets value of the specified <see cref="ResultProperty"/> on the target object
/// when a 'select' attribute exists and fills an <see cref="IList"/> property
/// on the <see cref="ResultProperty"/> are empties.
/// </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 current <see cref="IDataReader"/></param>
/// <param name="keys">The keys</param>
public void Set(RequestScope request, IResultMap resultMap,
ResultProperty mapping, ref object target, IDataReader reader, object keys)
{
// Get the select statement
IMappedStatement selectStatement = request.MappedStatement.ModelStore.GetMappedStatement(mapping.Select);
PostBindind postSelect = new PostBindind();
postSelect.Statement = selectStatement;
postSelect.Keys = keys;
postSelect.Target = target;
postSelect.ResultProperty = mapping;
if (mapping.IsLazyLoad)
{
object values = mapping.LazyFactory.CreateProxy(request.MappedStatement.ModelStore.DataMapper, selectStatement, keys, target, mapping.SetAccessor);
//为target类的mapping属性设置值为values
mapping.Set(target, values);
}
else
{
if (mapping.SetAccessor.MemberType.GetGenericTypeDefinition() == typeof(IList<>))
{
postSelect.Method = PostBindind.ExecuteMethod.ExecuteQueryForGenericIList;
}
//将postSelect类对象添加到队列中
request.DelayedLoad.Enqueue(postSelect);
}
}
/// <summary>
/// Gets the value of an argument constructor.
/// </summary>
/// <param name="request">The current <see cref="RequestScope"/>.</param>
/// <param name="mapping">The <see cref="ResultProperty"/> with the argument infos.</param>
/// <param name="reader">The current <see cref="IDataReader"/>.</param>
/// <param name="keys">The keys</param>
/// <returns>The paremeter value.</returns>
public object GetValue(RequestScope request, ResultProperty mapping,
ref IDataReader reader, object keys)
{
if (mapping.TypeHandler == null ||
mapping.TypeHandler is UnknownTypeHandler) // Find the TypeHandler
{
lock(mapping)
{
if (mapping.TypeHandler == null || mapping.TypeHandler is UnknownTypeHandler)
{
int columnIndex = 0;
if (mapping.ColumnIndex == ResultProperty.UNKNOWN_COLUMN_INDEX)
{
columnIndex = reader.GetOrdinal(mapping.ColumnName);
}
else
{
columnIndex = mapping.ColumnIndex;
}
Type systemType =reader.GetFieldType(columnIndex);
mapping.TypeHandler = request.DataExchangeFactory.TypeHandlerFactory.GetTypeHandler(systemType);
}
}
}
object dataBaseValue = mapping.GetDataBaseValue( reader );
request.IsRowDataFound = request.IsRowDataFound || (dataBaseValue != null);
return dataBaseValue;
}
///<summary>
/// Sets value of the specified <see cref="ResultProperty"/> on the target object
/// when a 'select' attribute exists and fills an object property.
/// on the <see cref="ResultProperty"/> are empties.
/// </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 current <see cref="IDataReader"/></param>
/// <param name="keys">The keys</param>
public void Set(RequestScope request, IResultMap resultMap,
ResultProperty mapping, ref object target, IDataReader reader, object keys)
{
// Get the select statement
IMappedStatement selectStatement = request.MappedStatement.ModelStore.GetMappedStatement(mapping.Select);
PostBindind postSelect = new PostBindind();
postSelect.Statement = selectStatement;
postSelect.Keys = keys;
postSelect.Target = target;
postSelect.ResultProperty = mapping;
if (mapping.IsLazyLoad)
{
object values = mapping.LazyFactory.CreateProxy(
request.MappedStatement.ModelStore.DataMapper,
selectStatement, keys, target, mapping.SetAccessor);
mapping.Set(target, values);
}
else
{
postSelect.Method = PostBindind.ExecuteMethod.ExecuteQueryForObject;
request.DelayedLoad.Enqueue(postSelect);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SelectStrategy"/> class.
/// </summary>
/// <param name="mapping">The mapping.</param>
/// <param name="selectArrayStrategy">The select array strategy.</param>
/// <param name="selectGenericListStrategy">The select generic list strategy.</param>
/// <param name="selectListStrategy">The select list strategy.</param>
/// <param name="selectObjectStrategy">The select object strategy.</param>
public SelectStrategy(ResultProperty mapping,
IArgumentStrategy selectArrayStrategy,
IArgumentStrategy selectGenericListStrategy,
IArgumentStrategy selectListStrategy,
IArgumentStrategy selectObjectStrategy)
{
// Collection object or .NET object
if (mapping.MemberType.BaseType == typeof(Array))
{
_selectStrategy = selectArrayStrategy;
}
else if (mapping.MemberType.IsGenericType &&
typeof(IList<>).IsAssignableFrom(mapping.MemberType.GetGenericTypeDefinition()))
{
_selectStrategy = selectGenericListStrategy;
}
// Check if the object to Map implement 'IList' or is IList type
// If yes the ResultProperty is map to a IList object
else if ( typeof(IList).IsAssignableFrom(mapping.MemberType) )
{
_selectStrategy = selectListStrategy;
}
else // The ResultProperty is map to a .Net object
{
_selectStrategy = selectObjectStrategy;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SelectStrategy"/> class.
/// </summary>
/// <param name="mapping">The mapping.</param>
/// <param name="selectArrayStrategy">The select array strategy.</param>
/// <param name="selectGenericListStrategy">The select generic list strategy.</param>
/// <param name="selectListStrategy">The select list strategy.</param>
/// <param name="selectObjectStrategy">The select object strategy.</param>
public SelectStrategy(ResultProperty mapping,
IPropertyStrategy selectArrayStrategy,
IPropertyStrategy selectGenericListStrategy,
IPropertyStrategy selectListStrategy,
IPropertyStrategy selectObjectStrategy)
{
Contract.Require.That(selectArrayStrategy, Is.Not.Null).When("retrieving argument selectArrayStrategy in SelectStrategy constructor");
Contract.Require.That(selectGenericListStrategy, Is.Not.Null).When("retrieving argument selectGenericListStrategy in SelectStrategy constructor");
Contract.Require.That(selectListStrategy, Is.Not.Null).When("retrieving argument selectListStrategy in SelectStrategy constructor");
Contract.Require.That(selectObjectStrategy, Is.Not.Null).When("retrieving argument selectObjectStrategy in SelectStrategy constructor");
// Collection object or .NET object
if (mapping.SetAccessor.MemberType.BaseType == typeof(Array))
{
selectStrategy = selectArrayStrategy;
}
else if (mapping.SetAccessor.MemberType.IsGenericType &&
typeof(IList<>).IsAssignableFrom(mapping.SetAccessor.MemberType.GetGenericTypeDefinition()) )
{
selectStrategy = selectGenericListStrategy;
}
// Check if the object to Map implement 'IList' or is IList type
// If yes the ResultProperty is map to a IList object
else if (typeof(IList).IsAssignableFrom(mapping.SetAccessor.MemberType))
{
selectStrategy = selectListStrategy;
}
else // The ResultProperty is map to a .Net object
{
selectStrategy = selectObjectStrategy;
}
}
/// <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="target">The target.</param>
/// <param name="reader">The reader.</param>
/// <returns></returns>
public object Get(RequestScope request, IResultMap resultMap, ResultProperty mapping, ref object target, IDataReader reader)
{
object result = null;
IResultMap propertyRresultMap = mapping.NestedResultMap.ResolveSubMap(reader);
string circularKey = GetCircularKey(propertyRresultMap, reader);
// Gets the [key, result object] already build
IDictionary<string, object> buildObjects = request.GetCirularKeys(propertyRresultMap);
if (buildObjects != null && buildObjects.ContainsKey(circularKey))
{
// circular key is already known, so get the existing result object
result = buildObjects[circularKey];
}
else if (circularKey == null || buildObjects == null || !buildObjects.ContainsKey(circularKey))
{
// circular key is NOT known, so create a new result object.
result = resultMapStrategy.Get(request, resultMap, mapping, ref target, reader);
if (buildObjects == null)
{
buildObjects = new Dictionary<string, object>();
request.SetCirularKeys(propertyRresultMap, buildObjects);
}
buildObjects[circularKey] = result;
}
return result;
}
/// <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)
{
object obj = Get(request, resultMap, mapping, ref target, reader);
// Sets created object on the property
resultMap.SetValueOfProperty( ref target, mapping, obj );
}
/// <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)
{
if (dataReader.IsDBNull(mapping.ColumnIndex))
{
return DBNull.Value;
}
return Enum.Parse(mapping.MemberType, dataReader.GetValue(mapping.ColumnIndex).ToString());
}
/// <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)
{
if (dataReader.IsDBNull(mapping.ColumnIndex))
{
return DBNull.Value;
}
return dataReader.GetFloat(mapping.ColumnIndex);
}
/// <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)
{
if (dataReader.IsDBNull(mapping.ColumnIndex) || dataReader.GetBytes(mapping.ColumnIndex, 0, null, 0, 0) == 0)
{
return DBNull.Value;
}
return GetValueByIndex(mapping.ColumnIndex, dataReader);
}
/// <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)
{
if (dataReader.IsDBNull(mapping.ColumnIndex))
{
return DBNull.Value;
}
return new byte?( Convert.ToByte(dataReader.GetValue(mapping.ColumnIndex)) );
}
/// <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)
{
if (dataReader.IsDBNull(mapping.ColumnIndex))
{
return DBNull.Value;
}
return new char?( dataReader.GetString(mapping.ColumnIndex)[0] );
}
///<summary>
/// Sets value of the specified <see cref="ResultProperty"/> on the target object
/// when the 'select' and 'resultMap' attributes
/// on the <see cref="ResultProperty"/> are empties.
/// </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)
{
//获取属性mapping的值
object obj = Get(request, resultMap, mapping, ref target, reader);
//将mapping的值放到类中对应的属性里
resultMap.SetValueOfProperty(ref target, mapping, obj);
}
/// <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)
{
if (dataReader.IsDBNull(mapping.ColumnIndex))
{
return DBNull.Value;
}
// Don't used dataReader.GetInt32 to fix oracle who alwray return decimal type
return Convert.ToInt32(dataReader.GetValue(mapping.ColumnIndex));
}
/// <summary>
/// Gets the value of an argument constructor.
/// </summary>
/// <param name="request">The current <see cref="RequestScope"/>.</param>
/// <param name="mapping">The <see cref="ResultProperty"/> with the argument infos.</param>
/// <param name="reader">The current <see cref="IDataReader"/>.</param>
/// <param name="keys">The keys</param>
/// <returns>The paremeter value.</returns>
public object GetValue(RequestScope request, ResultProperty mapping,
ref IDataReader reader, object keys)
{
// Get the select statement
IMappedStatement selectStatement = request.MappedStatement.ModelStore.GetMappedStatement(mapping.Select);
reader = DataReaderTransformer.Transform(reader, request.Session.SessionFactory.DataSource.DbProvider);
return selectStatement.ExecuteQueryForObject(request.Session, keys, null);
}
/// <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);
if (dataReader.IsDBNull(index) || dataReader.GetBytes(index, 0, null, 0, 0) == 0)
{
return DBNull.Value;
}
return GetValueByIndex(index, dataReader);
}
/// <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);
if (dataReader.IsDBNull(index))
{
return DBNull.Value;
}
return Enum.Parse(mapping.MemberType, dataReader.GetValue(index).ToString());
}
/// <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);
if (dataReader.IsDBNull(index))
{
return DBNull.Value;
}
return dataReader.GetFloat(index);
}
/// <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);
if (dataReader.IsDBNull(index))
{
return DBNull.Value;
}
return new byte?( Convert.ToByte(dataReader.GetValue(index)) );
}
/// <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);
if (dataReader.IsDBNull(index))
{
return DBNull.Value;
}
// Don't used dataReader.GetInt32 to fix oracle who alwray return decimal type
return new Int16?(Convert.ToInt16(dataReader.GetValue(index)));
}
/// <summary>
/// Processes the specified <see cref="IDataReader"/>
/// when a ResultClass is specified on the statement and
/// the ResultClass is a SimpleType.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="reader">The reader.</param>
/// <param name="resultObject">The result object.</param>
public object Process(RequestScope request, ref IDataReader reader, object resultObject)
{
object outObject = resultObject;
AutoResultMap resultMap = (AutoResultMap)request.CurrentResultMap;
if (outObject == null)
{
outObject = resultMap.CreateInstanceOfResult(null);
}
if (!resultMap.IsInitalized)
{
lock(resultMap)
{
if (!resultMap.IsInitalized)
{
// Create a ResultProperty
const string propertyName = "value";
const int columnIndex = 0;
ITypeHandler typeHandler = request.DataExchangeFactory.TypeHandlerFactory.GetTypeHandler(outObject.GetType());
ResultProperty property = new ResultProperty(
propertyName,
string.Empty,
columnIndex,
string.Empty,
string.Empty,
string.Empty,
false,
string.Empty,
null,
string.Empty,
null,
null,
typeHandler);
//property.PropertyStrategy = PropertyStrategyFactory.Get(property);
resultMap.Properties.Add(property);
resultMap.DataExchange = request.DataExchangeFactory.GetDataExchangeForClass(typeof(int));// set the PrimitiveDataExchange
resultMap.IsInitalized = true;
}
}
}
//为outObject类的属性property赋值
resultMap.Properties[0].PropertyStrategy.Set(request, resultMap, resultMap.Properties[0], ref outObject, reader, null);
return outObject;
}
/// <summary>
/// Gets the value of an argument constructor.
/// </summary>
/// <param name="request">The current <see cref="RequestScope"/>.</param>
/// <param name="mapping">The <see cref="ResultProperty"/> with the argument infos.</param>
/// <param name="reader">The current <see cref="IDataReader"/>.</param>
/// <param name="keys">The keys</param>
/// <returns>The paremeter value.</returns>
public object GetValue(RequestScope request, ResultProperty mapping,
ref IDataReader reader, object keys)
{
// Get the select statement
IMappedStatement selectStatement = request.MappedStatement.ModelStore.GetMappedStatement(mapping.Select);
if (mapping.MemberType == typeof(IList))
{
reader = DataReaderTransformer.Transform(reader, request.Session.SessionFactory.DataSource.DbProvider);
return selectStatement.ExecuteQueryForList(request.Session, keys);
}
reader = DataReaderTransformer.Transform(reader, request.Session.SessionFactory.DataSource.DbProvider);
IFactory factory = request.DataExchangeFactory.ObjectFactory.CreateFactory(mapping.MemberType, Type.EmptyTypes);
object values = factory.CreateInstance(null);
selectStatement.ExecuteQueryForList(request.Session, keys, (IList)values);
return values;
}
/// <summary>
/// Gets the value of an argument constructor.
/// </summary>
/// <param name="request">The current <see cref="RequestScope"/>.</param>
/// <param name="mapping">The <see cref="ResultProperty"/> with the argument infos.</param>
/// <param name="reader">The current <see cref="IDataReader"/>.</param>
/// <param name="keys">The keys</param>
/// <returns>The paremeter value.</returns>
public object GetValue(RequestScope request, ResultProperty mapping,
ref IDataReader reader, object keys)
{
// Get the select statement
IMappedStatement selectStatement = request.MappedStatement.ModelStore.GetMappedStatement(mapping.Select);
reader = DataReaderTransformer.Transform(reader, request.Session.SessionFactory.DataSource.DbProvider);
IList values = selectStatement.ExecuteQueryForList(request.Session, keys);
Type elementType = mapping.MemberType.GetElementType();
Array array = Array.CreateInstance(elementType, values.Count);
int count = values.Count;
for(int i=0;i<count;i++)
{
array.SetValue(values[i],i);
}
return array;
}
/// <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)
{
if (dataReader.IsDBNull(mapping.ColumnIndex))
{
return DBNull.Value;
}
// Don't used dataReader.GetInt32 to fix oracle who alwray return decimal type
object obj=0;
try
{
obj = dataReader.GetValue(mapping.ColumnIndex);
}
catch(Exception e)
{
string m =mapping.ColumnName+ e.Message;
}
return Convert.ToInt32(obj);
}
///<summary>
/// Sets value of the specified <see cref="ResultProperty"/> on the target object
/// when a 'select' attribute exists and fills an Array property
/// on the <see cref="ResultProperty"/> are empties.
/// </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 <see cref="IDataReader"/></param>
/// <param name="keys">The keys</param>
public void Set(RequestScope request, IResultMap resultMap,
ResultProperty mapping, ref object target, IDataReader reader, object keys)
{
// Get the select statement
IMappedStatement selectStatement = request.MappedStatement.ModelStore.GetMappedStatement(mapping.Select);
PostBindind postSelect = new PostBindind();
postSelect.Statement = selectStatement;
postSelect.Keys = keys;
postSelect.Target = target;
postSelect.ResultProperty = mapping;
if (mapping.IsLazyLoad)
{
throw new NotImplementedException("Lazy load no supported for System.Array property:" + mapping.SetAccessor.Name);
}
postSelect.Method = PostBindind.ExecuteMethod.ExecuteQueryForArrayList;
request.DelayedLoad.Enqueue(postSelect);
}
/// <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)
{
Type targetType = target.GetType();
if ((targetType != parameterClass)
&& !targetType.IsSubclassOf(parameterClass)
&& !parameterClass.IsAssignableFrom(targetType))
{
throw new ArgumentException("Could not set value in class '" + target.GetType() + "' for property '" + mapping.PropertyName + "' of type '" + mapping.MemberType + "'");
}
if ( mapping.IsComplexMemberName)
{
ObjectProbe.SetMemberValue(target, mapping.PropertyName, dataBaseValue,
DataExchangeFactory.ObjectFactory,
DataExchangeFactory.AccessorFactory);
}
else
{
mapping.Set(target, dataBaseValue);
}
}
/// <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)
{
object[] parameters = null;
bool isParameterFound = false;
IResultMap resultMapping = mapping.NestedResultMap.ResolveSubMap(reader);
if (resultMapping.Parameters.Count > 0)
{
parameters = new object[resultMapping.Parameters.Count];
// Fill parameters array
for (int index = 0; index < resultMapping.Parameters.Count; index++)
{
ResultProperty resultProperty = resultMapping.Parameters[index];
parameters[index] = resultProperty.GetValue(request, ref reader, null);
request.IsRowDataFound = request.IsRowDataFound || (parameters[index] != null);
isParameterFound = isParameterFound || (parameters[index] != null);
}
}
object obj = null;
// If I have a constructor tag and all argumments values are null, the obj is null
if (resultMapping.Parameters.Count > 0 && isParameterFound == false)
{
obj = null;
}
else
{
obj = resultMapping.CreateInstanceOfResult(parameters);
// Fills properties on the new object
if (FillObjectWithReaderAndResultMap(request, reader, resultMapping, ref obj) == false)
{
obj = null;
}
}
return obj;
}
/// <summary>
/// Gets the value of an argument constructor.
/// </summary>
/// <param name="request">The current <see cref="RequestScope"/>.</param>
/// <param name="mapping">The <see cref="ResultProperty"/> with the argument infos.</param>
/// <param name="reader">The current <see cref="IDataReader"/>.</param>
/// <param name="keys">The keys</param>
/// <returns>The paremeter value.</returns>
public object GetValue(RequestScope request, ResultProperty mapping,
ref IDataReader reader, object keys)
{
// Get the select statement
IMappedStatement selectStatement = request.MappedStatement.ModelStore.GetMappedStatement(mapping.Select);
reader = DataReaderTransformer.Transform(reader, request.Session.SessionFactory.DataSource.DbProvider);
//Type[] typeArgs = mapping.MemberType.GetGenericArguments();
//Type genericList = typeof(IList<>);
//Type constructedType = genericList.MakeGenericType(typeArgs);
Type elementType = mapping.MemberType.GetGenericArguments()[0];
Type mappedStatementType = selectStatement.GetType();
//Type[] typeArguments = { typeof(ISession), typeof(object) };
MethodInfo[] mis = mappedStatementType.GetMethods(BindingFlags.InvokeMethod | BindingFlags.Public | BindingFlags.Instance);
MethodInfo mi = null;
for (int i = 0; i < mis.Length; i++)
{
if (mis[i].IsGenericMethod &&
mis[i].Name == "ExecuteQueryForList" &&
mis[i].GetParameters().Length == 2)
{
mi = mis[i];
break;
}
}
MethodInfo miConstructed = mi.MakeGenericMethod(elementType);
// Invoke the method.
object[] args = { request.Session, keys };
object values = miConstructed.Invoke(selectStatement, args);
return values;
}
/// <summary>
/// Finds the <see cref="IPropertyStrategy"/>.
/// </summary>
/// <param name="mapping">The <see cref="ResultProperty"/>.</param>
/// <returns>The <see cref="IPropertyStrategy"/></returns>
public static IPropertyStrategy Get(ResultProperty mapping)
{
// no 'select' or 'resultMap' attributes
if (mapping.Select.Length == 0 && mapping.NestedResultMap == null)
{
// We have a 'normal' ResultMap
return defaultStrategy;
}
if (mapping.NestedResultMap != null) // 'resultMap' attribute
{
if (mapping.NestedResultMap.GroupByPropertyNames.Count>0)
{
return groupByStrategy;
}
if (mapping.MemberType.IsGenericType &&
typeof(IList<>).IsAssignableFrom(mapping.MemberType.GetGenericTypeDefinition()))
{
return groupByStrategy;
}
if (typeof(IList).IsAssignableFrom(mapping.MemberType))
{
return groupByStrategy;
}
if (mapping.NestedResultMap.KeyPropertyNames.Count > 0)
{
return circularStrategy;
}
return resultMapStrategy;
}
//'select' ResultProperty
return new SelectStrategy(mapping,
selectArrayStrategy,
selectGenericListStrategy,
selectListStrategy,
selectObjectStrategy);
}
/// <summary>
/// Processes the specified <see cref="IDataReader"/>
/// when a ResultClass is specified on the statement and
/// the ResultClass is <see cref="IList"/>.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="reader">The reader.</param>
/// <param name="resultObject">The result object.</param>
public object Process(RequestScope request, ref IDataReader reader, object resultObject)
{
object outObject = resultObject;
//AutoResultMap resultMap = request.CurrentResultMap as AutoResultMap;
if (outObject == null)
{
outObject = request.CurrentResultMap.CreateInstanceOfResult(null);
}
//将reader当前行中的所有字段加入到IList对象中
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,
null,
typeHandler);
((IList) outObject).Add(property.GetDataBaseValue(reader));
}
return outObject;
}
/// <summary>
/// Set the value of an object property.
/// </summary>
/// <param name="target">The object to set the property.</param>
/// <param name="property">The result property to use.</param>
/// <param name="dataBaseValue">The database value to set.</param>
public void SetValueOfProperty(ref object target, ResultProperty property, object dataBaseValue)
{
throw new NotImplementedException("The method or operation is not implemented.");
}
/// <summary>
/// Set the value of an object property.
/// </summary>
/// <param name="target">The object to set the property.</param>
/// <param name="property">The result property to use.</param>
/// <param name="dataBaseValue">The database value to set.</param>
public void SetValueOfProperty(ref object target, ResultProperty property, object dataBaseValue)
{
dataExchange.SetData(ref target, property, dataBaseValue);
}