public Expression GetShortCircuit(IObjectMappingData mappingData)
{
var mapperData = mappingData.MapperData;
var dictionaryVariables = new DictionaryEntryVariablePair(mapperData);
var fallbackValue = GetFallbackValue(mappingData);
var noMatchingKeys = dictionaryVariables.GetNoKeysWithMatchingStartQuery();
var returnFallback = Expression.Return(mapperData.ReturnLabelTarget, fallbackValue);
var ifNoMatchingKeysShortCircuit = Expression.IfThen(noMatchingKeys, returnFallback);
var foundValueNonNull = dictionaryVariables.Value.GetIsNotDefaultComparison();
var entryExistsTest = GetEntryExistsTest(dictionaryVariables);
var mapValueCall = GetMapValueCall(dictionaryVariables.Value, mapperData);
var valueMappingOrFallback = Expression.Condition(foundValueNonNull, mapValueCall, fallbackValue);
var returnMapValueResult = Expression.Return(mapperData.ReturnLabelTarget, valueMappingOrFallback);
var ifEntryExistsShortCircuit = Expression.IfThen(entryExistsTest, returnMapValueResult);
return(Expression.Block(
dictionaryVariables.Variables,
ifNoMatchingKeysShortCircuit,
ifEntryExistsShortCircuit));
}
public SourceElementsDictionaryPopulationLoopData(
DictionaryEntryVariablePair dictionaryVariables,
EnumerablePopulationBuilder builder)
{
_dictionaryVariables = dictionaryVariables;
_builder = builder;
var sourceDictionaryMember = dictionaryVariables.SourceMember;
_performElementChecks =
ElementTypesAreSimple ||
sourceDictionaryMember.HasObjectEntries ||
(builder.Context.ElementTypesAreAssignable && !sourceDictionaryMember.ValueType.IsSimple());
_targetMemberKey = dictionaryVariables
.GetTargetMemberDictionaryEnumerableElementKey(builder.Counter, MapperData);
_useDirectValueAccess = ElementTypesAreSimple
? builder.Context.ElementTypesAreAssignable
: sourceDictionaryMember.HasObjectEntries;
var useSeparateTargetKeyVariable = !ElementTypesAreSimple && _performElementChecks;
_targetElementKey = useSeparateTargetKeyVariable
? Expression.Variable(typeof(string), "targetElementKey")
: dictionaryVariables.Key;
_sourceElement = _useDirectValueAccess ? GetDictionaryEntryValueAccess() : dictionaryVariables.Value;
ContinueLoopTarget = Expression.Label(typeof(void), "Continue");
LoopExitCheck = MapperData.IsRoot ? GetRootLoopExitCheck() : GetKeyNotFoundLoopExitCheck();
}
public SourceElementsDictionaryAdapter(
DictionarySourceMember sourceMember,
EnumerablePopulationBuilder builder)
: base(builder)
{
_dictionaryVariables = new DictionaryEntryVariablePair(sourceMember, builder.MapperData);
}
public SourceInstanceDictionaryAdapter(
DictionarySourceMember sourceMember,
EnumerablePopulationBuilder builder)
: base(builder)
{
_defaultAdapter = new DefaultSourceEnumerableAdapter(builder);
DictionaryVariables = new DictionaryEntryVariablePair(sourceMember, builder.MapperData);
}
public SourceObjectDictionaryPopulationLoopData(
Expression emptyTarget,
DictionaryEntryVariablePair dictionaryVariables,
EnumerablePopulationBuilder builder)
{
_emptyTarget = emptyTarget;
_builder = builder;
_enumerableLoopData = new EnumerableSourcePopulationLoopData(builder);
_elementsDictionaryLoopData = new SourceElementsDictionaryPopulationLoopData(dictionaryVariables, builder);
_sourceEnumerableFound = Parameters.Create <bool>("sourceEnumerableFound");
ContinueLoopTarget = Expression.Label(typeof(void), "Continue");
LoopExitCheck = GetCompositeLoopExitCheck();
}
private static Expression GetEntryExistsTest(DictionaryEntryVariablePair dictionaryVariables)
{
var returnLabel = Expression.Label(typeof(bool), "Return");
var returnFalse = Expression.Return(returnLabel, false.ToConstantExpression());
var ifKeyNotFoundReturnFalse = dictionaryVariables.GetKeyNotFoundShortCircuit(returnFalse);
var valueAssignment = dictionaryVariables.GetEntryValueAssignment();
var returnTrue = Expression.Label(returnLabel, true.ToConstantExpression());
if (dictionaryVariables.HasConstantTargetMemberKey)
{
return(Expression.Block(ifKeyNotFoundReturnFalse, valueAssignment, returnTrue));
}
var keyAssignment = dictionaryVariables.GetNonConstantKeyAssignment();
return(Expression.Block(
keyAssignment,
ifKeyNotFoundReturnFalse,
valueAssignment,
returnTrue));
}
