private static void ProcessNestedAccesses(
IMemberMapperData mapperData,
ref Expression value,
out Expression[] nestedAccesses,
out ICollection <ParameterExpression> variables)
{
nestedAccesses = mapperData.GetNestedAccessesIn(value, targetCanBeNull: false);
variables = new List <ParameterExpression>();
if (nestedAccesses.None())
{
return;
}
var nestedAccessVariableByNestedAccess = new Dictionary <Expression, Expression>();
for (var i = 0; i < nestedAccesses.Length; i++)
{
var nestedAccess = nestedAccesses[i];
if (CacheValueInVariable(nestedAccess))
{
var valueVariable = Expression.Variable(nestedAccess.Type, "accessValue");
nestedAccesses[i] = Expression.Assign(valueVariable, nestedAccess);
nestedAccessVariableByNestedAccess.Add(nestedAccess, valueVariable);
variables.Add(valueVariable);
}
}
value = value.Replace(nestedAccessVariableByNestedAccess);
}
public Expression GetConditionOrNull(
IMemberMapperData mapperData,
CallbackPosition position,
QualifiedMember targetMember)
{
if (!HasCondition)
{
return(GetTypeCheckConditionOrNull(mapperData));
}
var condition = _conditionLambda.GetBody(mapperData, position, targetMember);
if (_negateCondition)
{
condition = Expression.Not(condition);
}
var targetCanBeNull = position.IsPriorToObjectCreation(targetMember);
var conditionNestedAccessesChecks = mapperData
.GetNestedAccessesIn(condition, targetCanBeNull)
.GetIsNotDefaultComparisonsOrNull();
if (conditionNestedAccessesChecks != null)
{
condition = Expression.AndAlso(conditionNestedAccessesChecks, condition);
}
var typeCheck = GetTypeCheckConditionOrNull(mapperData);
if (typeCheck != null)
{
condition = Expression.AndAlso(typeCheck, condition);
}
return(condition);
}