private Expression GetPopulationExpression()
{
var finalValue = _dataSources.GetFinalValueOrNull();
var excludeFinalValue = finalValue == null;
var finalDataSourceIndex = _dataSources.Count - 1;
Expression population = null;
for (var i = finalDataSourceIndex; i >= 0; --i)
{
var dataSource = _dataSources[i];
if (i == finalDataSourceIndex)
{
if (excludeFinalValue)
{
continue;
}
population = MapperData.GetTargetMemberPopulation(finalValue);
population = dataSource.FinalisePopulation(population);
continue;
}
var memberPopulation = MapperData.GetTargetMemberPopulation(dataSource.Value);
population = dataSource.FinalisePopulation(memberPopulation, population);
}
return(population);
}
private Expression GetBinding(Expression populationGuard)
{
var bindingValue = _dataSources.BuildValue();
if (MapperData.RuleSet.Settings.AllowGuardedBindings && (populationGuard != null))
{
bindingValue = bindingValue.ToIfFalseDefaultCondition(populationGuard, MapperData);
}
return(MapperData.GetTargetMemberPopulation(bindingValue));
}
public Expression GetPopulationExpression()
{
var fallbackValue = GetFallbackValueOrNull();
var excludeFallback = fallbackValue == null;
Expression population = null;
for (var i = _dataSources.Count - 1; i >= 0; --i)
{
var dataSource = _dataSources[i];
if (i == _dataSources.Count - 1)
{
if (excludeFallback)
{
continue;
}
population = MapperData.GetTargetMemberPopulation(fallbackValue);
if (dataSource.IsConditional)
{
population = dataSource.AddCondition(population);
}
population = dataSource.AddPreCondition(population);
continue;
}
var memberPopulation = MapperData.GetTargetMemberPopulation(dataSource.Value);
population = dataSource.AddCondition(memberPopulation, population);
population = dataSource.AddPreCondition(population);
}
return(population);
}