private static Expression WrapInTryCatch(Expression mappingBlock, IMemberMapperData mapperData)
{
var configuredCallback = mapperData.MapperContext.UserConfigurations.GetExceptionCallbackOrNull(mapperData);
var exceptionVariable = Parameters.Create <Exception>("ex");
Expression catchBody;
if (configuredCallback != null)
{
var callbackActionType = configuredCallback.Type.GetGenericTypeArguments()[0];
Type[] contextTypes;
Expression contextAccess;
if (callbackActionType.IsGenericType())
{
contextTypes = callbackActionType.GetGenericTypeArguments();
contextAccess = mapperData.GetAppropriateTypedMappingContextAccess(contextTypes);
}
else
{
contextTypes = new[] { mapperData.SourceType, mapperData.TargetType };
contextAccess = mapperData.MappingDataObject;
}
var exceptionContextCreateMethod = ObjectMappingExceptionData
.CreateMethod
.MakeGenericMethod(contextTypes);
var exceptionContextCreateCall = Expression.Call(
exceptionContextCreateMethod,
contextAccess,
exceptionVariable);
var callbackInvocation = Expression.Invoke(configuredCallback, exceptionContextCreateCall);
var returnDefault = mappingBlock.Type.ToDefaultExpression();
catchBody = Expression.Block(callbackInvocation, returnDefault);
}
else
{
catchBody = Expression.Throw(
MappingException.GetFactoryMethodCall(mapperData, exceptionVariable),
mappingBlock.Type);
}
var catchBlock = Expression.Catch(exceptionVariable, catchBody);
return(Expression.TryCatch(mappingBlock, catchBlock));
}
public static TryExpression WrapInTryCatch(this Expression mapping, IMemberMapperData mapperData)
{
var configuredCallback = mapperData.MapperContext.UserConfigurations.GetExceptionCallbackOrNull(mapperData);
var exceptionVariable = Parameters.Create <Exception>("ex");
if (configuredCallback == null)
{
var catchBody = Expression.Throw(
MappingException.GetFactoryMethodCall(mapperData, exceptionVariable),
mapping.Type);
return(CreateTryCatch(mapping, exceptionVariable, catchBody));
}
var configuredCatchBody = configuredCallback
.ToCatchBody(exceptionVariable, mapping.Type, mapperData);
return(CreateTryCatch(mapping, exceptionVariable, configuredCatchBody));
}