private static Expression NewExpr(this Type baseType, Type ifInterfaceType)
{
var newExpr = baseType.IsInterface()
? New(
ifInterfaceType.MakeGenericType(ElementTypeHelper.GetElementTypes(baseType,
ElementTypeFlags.BreakKeyValuePair)))
: DelegateFactory.GenerateConstructorExpression(baseType);
return(newExpr);
}
public static Expression MapCollectionExpression(IConfigurationProvider configurationProvider, ProfileMap profileMap, 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 = ElementTypeHelper.GetElementType(sourceExpression.Type);
var itemExpr = mapItem(configurationProvider, profileMap, propertyMap, sourceExpression.Type, passedDestination.Type,
contextExpression, out ParameterExpression 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 ifNullExpr = profileMap.AllowNullCollections ? Constant(null, passedDestination.Type) : (Expression)newExpression;
var clearMethod = destinationCollectionType.GetDeclaredMethod("Clear");
var isSourceNull = sourceExpression.Type.IsValueType() ? (Expression)Constant(false) : Equal(sourceExpression, Constant(null));
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(isSourceNull, 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));
}
public static Expression MapItemExpr(IConfigurationProvider configurationProvider, ProfileMap profileMap, Type sourceType, Type destType, Expression contextParam, out ParameterExpression itemParam)
{
var sourceElementType = ElementTypeHelper.GetElementType(sourceType);
var destElementType = ElementTypeHelper.GetElementType(destType);
itemParam = Parameter(sourceElementType, "item");
var typePair = new TypePair(sourceElementType, destElementType);
var itemExpr = MapExpression(configurationProvider, profileMap, typePair, itemParam, contextParam);
return(ToType(itemExpr, destElementType));
}
public static Expression MapKeyPairValueExpr(IConfigurationProvider configurationProvider, ProfileMap profileMap, Type sourceType, Type destType, Expression contextParam, out ParameterExpression itemParam)
{
var sourceElementTypes = ElementTypeHelper.GetElementTypes(sourceType, ElementTypeFlags.BreakKeyValuePair);
var destElementTypes = ElementTypeHelper.GetElementTypes(destType, ElementTypeFlags.BreakKeyValuePair);
var typePairKey = new TypePair(sourceElementTypes[0], destElementTypes[0]);
var typePairValue = new TypePair(sourceElementTypes[1], destElementTypes[1]);
var sourceElementType = typeof(KeyValuePair <,>).MakeGenericType(sourceElementTypes);
itemParam = Parameter(sourceElementType, "item");
var destElementType = typeof(KeyValuePair <,>).MakeGenericType(destElementTypes);
var keyExpr = MapExpression(configurationProvider, profileMap, typePairKey,
Property(itemParam, "Key"), contextParam);
var valueExpr = MapExpression(configurationProvider, profileMap, typePairValue,
Property(itemParam, "Value"), contextParam);
var keyPair = New(destElementType.GetDeclaredConstructors().First(), keyExpr, valueExpr);
return(keyPair);
}
public static Expression MapCollectionExpression(IConfigurationProvider configurationProvider, ProfileMap profileMap, PropertyMap propertyMap, Expression sourceExpression, Expression destExpression, Expression contextExpression, Type ifInterfaceType, MapItem mapItem)
{
var passedDestination = Variable(destExpression.Type, "passedDestination");
var newExpression = Variable(passedDestination.Type, "collectionDestination");
var sourceElementType = ElementTypeHelper.GetElementType(sourceExpression.Type);
var itemExpr = mapItem(configurationProvider, profileMap, sourceExpression.Type, passedDestination.Type,
contextExpression, out ParameterExpression itemParam);
var destinationElementType = itemExpr.Type;
var destinationCollectionType = typeof(ICollection <>).MakeGenericType(destinationElementType);
if (!destinationCollectionType.IsAssignableFrom(destExpression.Type))
{
destinationCollectionType = typeof(IList);
}
var addMethod = destinationCollectionType.GetDeclaredMethod("Add");
Expression destination, createInstance, assignNewExpression;
UseDestinationValue();
var addItems = ForEach(sourceExpression, itemParam, Call(destination, addMethod, itemExpr));
var mapExpr = Block(addItems, destination);
var clearMethod = destinationCollectionType.GetDeclaredMethod("Clear");
var checkNull =
Block(new[] { newExpression, passedDestination },
Assign(passedDestination, destExpression),
assignNewExpression,
Call(destination, clearMethod),
ToType(mapExpr, createInstance.Type)
);
if (propertyMap != null)
{
return(checkNull);
}
var elementTypeMap = configurationProvider.ResolveTypeMap(sourceElementType, destinationElementType);
if (elementTypeMap == null)
{
return(checkNull);
}
var checkContext = CheckContext(elementTypeMap, contextExpression);
if (checkContext == null)
{
return(checkNull);
}
return(Block(checkContext, checkNull));
void UseDestinationValue()
{
if (propertyMap?.UseDestinationValue == true)
{
createInstance = passedDestination;
destination = passedDestination;
assignNewExpression = Empty();
}
else
{
destination = newExpression;
createInstance = passedDestination.Type.NewExpr(ifInterfaceType);
var isReadOnly = Property(ToType(passedDestination, destinationCollectionType), "IsReadOnly");
assignNewExpression = Assign(newExpression,
Condition(OrElse(Equal(passedDestination, Constant(null)), isReadOnly), ToType(createInstance, passedDestination.Type), passedDestination));
}
}
}
