internal static Expression MapCollectionExpression(this TypeMapRegistry typeMapRegistry,
IConfigurationProvider configurationProvider, PropertyMap propertyMap, Expression sourceExpression,
Expression destExpression, Expression contextExpression, Func <Expression, Expression> conditionalExpression, Type ifInterfaceType, MapItem mapItem)
{
var passedDestination = Variable(destExpression.Type, "passedDestination");
var condition = conditionalExpression(passedDestination);
var newExpression = Variable(passedDestination.Type, "collectionDestination");
var sourceElementType = TypeHelper.GetElementType(sourceExpression.Type);
ParameterExpression itemParam;
var itemExpr = mapItem(typeMapRegistry, configurationProvider, propertyMap, sourceExpression.Type, passedDestination.Type, contextExpression, out itemParam);
var destinationElementType = itemExpr.Type;
var destinationCollectionType = typeof(ICollection <>).MakeGenericType(destinationElementType);
if (!destinationCollectionType.IsAssignableFrom(destExpression.Type))
{
destinationCollectionType = typeof(IList);
}
var addMethod = destinationCollectionType.GetDeclaredMethod("Add");
var destination = propertyMap?.UseDestinationValue == true ? passedDestination : newExpression;
var addItems = ForEach(sourceExpression, itemParam, Call(destination, addMethod, itemExpr));
var mapExpr = Block(addItems, destination);
var allowNullCollections = propertyMap?.TypeMap.Profile.AllowNullCollections ??
configurationProvider.Configuration.AllowNullCollections;
var ifNullExpr = allowNullCollections ? Constant(null, passedDestination.Type) : (Expression)newExpression;
var clearMethod = destinationCollectionType.GetDeclaredMethod("Clear");
var checkNull =
Block(new[] { newExpression, passedDestination },
Assign(passedDestination, destExpression),
IfThenElse(condition ?? Constant(false),
Block(Assign(newExpression, passedDestination), Call(newExpression, clearMethod)),
Assign(newExpression, passedDestination.Type.NewExpr(ifInterfaceType))),
Condition(Equal(sourceExpression, Constant(null)), ToType(ifNullExpr, passedDestination.Type), ToType(mapExpr, passedDestination.Type))
);
if (propertyMap != null)
{
return(checkNull);
}
var elementTypeMap = configurationProvider.ResolveTypeMap(sourceElementType, destinationElementType);
if (elementTypeMap == null)
{
return(checkNull);
}
var checkContext = TypeMapPlanBuilder.CheckContext(elementTypeMap, contextExpression);
if (checkContext == null)
{
return(checkNull);
}
return(Block(checkContext, checkNull));
}
internal static Expression MapCollectionExpression(this TypeMapRegistry typeMapRegistry,
IConfigurationProvider configurationProvider, PropertyMap propertyMap, Expression sourceExpression,
Expression destExpression, Expression contextExpression, Func <Expression, Expression> conditionalExpression, Type ifInterfaceType, MapItem mapItem)
{
var passedDestination = Expression.Variable(destExpression.Type, "passedDestination");
var condition = conditionalExpression(passedDestination);
var newExpression = Expression.Variable(passedDestination.Type, "collectionDestination");
var sourceElementType = TypeHelper.GetElementType(sourceExpression.Type);
var itemParam = Expression.Parameter(sourceElementType, "item");
var itemExpr = mapItem(typeMapRegistry, configurationProvider, propertyMap, sourceExpression.Type, passedDestination.Type, itemParam, contextExpression);
var destinationElementType = itemExpr.Type;
var destinationCollectionType = typeof(ICollection <>).MakeGenericType(destinationElementType);
var clearMethod = destinationCollectionType.GetDeclaredMethod("Clear");
var cast = typeof(Enumerable).GetDeclaredMethod("Cast").MakeGenericMethod(itemParam.Type);
var addMethod = destinationCollectionType.GetDeclaredMethod("Add");
var genericSource = sourceExpression.Type.IsGenericType() ? sourceExpression : Expression.Call(null, cast, sourceExpression);
var destination = propertyMap?.UseDestinationValue == true ? passedDestination : newExpression;
var addItems = ExpressionExtensions.ForEach(genericSource, itemParam, Expression.Call(destination, addMethod, itemExpr));
var mapExpr = Expression.Block(addItems, destination);
var ifNullExpr = configurationProvider.Configuration.AllowNullCollections ? Expression.Constant(null, passedDestination.Type) : (Expression)newExpression;
var checkNull =
Expression.Block(new[] { newExpression, passedDestination },
Expression.Assign(passedDestination, destExpression),
Expression.IfThenElse(condition ?? Expression.Constant(false),
Expression.Block(Expression.Assign(newExpression, passedDestination), Expression.Call(newExpression, clearMethod)),
Expression.Assign(newExpression, passedDestination.Type.NewExpr(ifInterfaceType))),
Expression.Condition(Expression.Equal(sourceExpression, Expression.Constant(null)), ExpressionExtensions.ToType(ifNullExpr, passedDestination.Type), ExpressionExtensions.ToType(mapExpr, passedDestination.Type))
);
if (propertyMap != null)
{
return(checkNull);
}
var elementTypeMap = configurationProvider.ResolveTypeMap(sourceElementType, destinationElementType);
if (elementTypeMap == null)
{
return(checkNull);
}
var checkContext = TypeMapPlanBuilder.CheckContext(elementTypeMap, contextExpression);
if (checkContext == null)
{
return(checkNull);
}
return(Expression.Block(checkContext, checkNull));
}
internal static Expression MapCollectionExpression(this TypeMapRegistry typeMapRegistry,
IConfigurationProvider configurationProvider, PropertyMap propertyMap, Expression sourceExpression,
Expression destExpression, Expression contextExpression, Func <Expression, Expression> conditionalExpression, Type ifInterfaceType, MapItem mapItem)
{
var passedDestination = Variable(destExpression.Type, "passedDestination");
var newExpressionValue = passedDestination.NewIfConditionFails(conditionalExpression, ifInterfaceType);
var newExpression = Variable(newExpressionValue.Type, "collectionDestination");
var sourceElementType = TypeHelper.GetElementType(sourceExpression.Type);
var itemParam = Parameter(sourceElementType, "item");
var itemExpr = mapItem(typeMapRegistry, configurationProvider, propertyMap, sourceExpression.Type, passedDestination.Type, itemParam, contextExpression);
var blockExpressions = new List <Expression>();
var blockVariables = new List <ParameterExpression> {
newExpression, passedDestination
};
Expression destination;
var destinationElementType = itemExpr.Type;
var destinationCollectionType = typeof(ICollection <>).MakeGenericType(destinationElementType);
var clearMethod = destinationCollectionType.GetDeclaredMethod("Clear");
if (passedDestination.Type.IsCollectionType())
{
if (propertyMap == null)
{
destination = newExpression;
blockExpressions.Add(IfThenElse(NotEqual(passedDestination, Constant(null)),
Call(passedDestination, clearMethod),
Assign(destination, newExpression)
));
}
else if (propertyMap.UseDestinationValue)
{
destination = passedDestination;
blockExpressions.Add(Call(passedDestination, clearMethod));
}
else
{
destination = newExpression;
}
}
else
{
destination = newExpression;
}
var cast = typeof(Enumerable).GetTypeInfo().DeclaredMethods.First(_ => _.Name == "Cast").MakeGenericMethod(itemParam.Type);
var addMethod = destinationCollectionType.GetDeclaredMethod("Add");
var genericSource = sourceExpression.Type.GetTypeInfo().IsGenericType ? sourceExpression : Call(null, cast, sourceExpression);
blockExpressions.Add(ForEach(genericSource, itemParam, Call(
destination,
addMethod,
itemExpr)));
blockExpressions.Add(destination);
var mapExpr = Block(blockExpressions);
var ifNullExpr = configurationProvider.Configuration.AllowNullCollections ? Constant(null, passedDestination.Type) : (Expression)newExpression;
var checkNull = Block(blockVariables,
Assign(passedDestination, destExpression),
Assign(newExpression, newExpressionValue),
Condition(Equal(sourceExpression, Constant(null)), ToType(ifNullExpr, passedDestination.Type), ToType(mapExpr, passedDestination.Type))
);
if (propertyMap != null)
{
return(checkNull);
}
var elementTypeMap = configurationProvider.ResolveTypeMap(sourceElementType, destinationElementType);
if (elementTypeMap == null)
{
return(checkNull);
}
var checkContext = TypeMapPlanBuilder.CheckContext(elementTypeMap, contextExpression);
if (checkContext == null)
{
return(checkNull);
}
return(Block(checkContext, checkNull));
}
