private static Expression ApplySourceFilterIfAppropriate(
Expression elementPopulation,
IPopulationLoopData loopData,
EnumerablePopulationBuilder builder)
{
if (!builder.MapperData.MapperContext.UserConfigurations.HasSourceValueFilters)
{
return(elementPopulation);
}
var sourceElement = loopData.GetSourceElementValue();
var sourceValueFilters = builder.MapperData
.GetSourceValueFilters(sourceElement.Type);
if (sourceValueFilters.None())
{
return(elementPopulation);
}
var sourceFilterConditions = sourceValueFilters
.GetFilterConditionsOrNull(sourceElement, builder.MapperData);
return((sourceFilterConditions != null)
? Expression.IfThen(sourceFilterConditions, elementPopulation)
: elementPopulation);
}
private void AddDerivedSourceTypePopulations(
IPopulationLoopData loopData,
QualifiedMember dictionaryEntryMember,
IObjectMappingData mappingData,
IEnumerable <Type> derivedSourceTypes,
ICollection <ParameterExpression> typedVariables,
ICollection <Expression> mappingExpressions)
{
var sourceElement = loopData.GetSourceElementValue();
var mapNextElement = Expression.Continue(loopData.ContinueLoopTarget);
var orderedDerivedSourceTypes = derivedSourceTypes
.OrderBy(t => t, TypeComparer.MostToLeastDerived);
foreach (var derivedSourceType in orderedDerivedSourceTypes)
{
var derivedSourceCheck = new DerivedSourceTypeCheck(derivedSourceType);
var typedVariableAssignment = derivedSourceCheck.GetTypedVariableAssignment(sourceElement);
typedVariables.Add(derivedSourceCheck.TypedVariable);
mappingExpressions.Add(typedVariableAssignment);
var derivedTypeMapping = GetDerivedTypeMapping(derivedSourceCheck, mappingData);
var derivedTypePopulation = GetPopulation(derivedTypeMapping, dictionaryEntryMember, mappingData);
var incrementCounter = _wrappedBuilder.GetCounterIncrement();
var derivedMappingBlock = Expression.Block(derivedTypePopulation, incrementCounter, mapNextElement);
var ifDerivedTypeReturn = Expression.IfThen(derivedSourceCheck.TypeCheck, derivedMappingBlock);
mappingExpressions.Add(ifDerivedTypeReturn);
}
}
private void InsertSourceElementNullCheck(
IPopulationLoopData loopData,
DictionaryTargetMember dictionaryEntryMember,
IMemberMapperData mapperData,
IList <Expression> mappingExpressions)
{
var sourceElement = loopData.GetSourceElementValue();
if (sourceElement.Type.CannotBeNull())
{
return;
}
loopData.NeedsContinueTarget = true;
var sourceElementIsNull = sourceElement.GetIsDefaultComparison();
var nullTargetValue = dictionaryEntryMember.ValueType.ToDefaultExpression();
var addNullEntry = dictionaryEntryMember.GetPopulation(nullTargetValue, mapperData);
var incrementCounter = _wrappedBuilder.GetCounterIncrement();
var continueLoop = Expression.Continue(loopData.ContinueLoopTarget);
var nullEntryActions = Expression.Block(addNullEntry, incrementCounter, continueLoop);
var ifNullContinue = Expression.IfThen(sourceElementIsNull, nullEntryActions);
mappingExpressions.Insert(0, ifNullContinue);
}
private static void InsertSourceElementNullCheck(IPopulationLoopData loopData, IList <Expression> mappingExpressions)
{
var sourceElement = loopData.GetSourceElementValue();
if (sourceElement.Type.CannotBeNull())
{
return;
}
loopData.NeedsContinueTarget = true;
var sourceElementIsNull = sourceElement.GetIsDefaultComparison();
var continueLoop = Expression.Continue(loopData.ContinueLoopTarget);
var ifNullContinue = Expression.IfThen(sourceElementIsNull, continueLoop);
mappingExpressions.Insert(0, ifNullContinue);
}
