public MappingInstruction(MappingInstruction parent,PropertyMap parentCollectionPropertyMap, DataMap dataMap, MappingDirection changeDirection, Object source,Object target)
{
this.Parent = parent;
this.ParentCollectionPropertyMap = parentCollectionPropertyMap;
this.DataMap = dataMap;
this.ChangeDirection = changeDirection;
this.Source = source;
this.Target = target;
this.Children = new MappingInstructionList();
this.SetCommandType();
}
private MappingInstruction BuildCommand(MappingInstruction parent, DataMap dataMap, PropertyMap parentCollectionPropertyMap, MappingDirection direction, Object source, Object target)
{
//create a new command. This will figure out based on the direction and the source and target objects
//whether we are doing an add, update, delete or nothing.
MappingInstruction dataMapCommand = new MappingInstruction(
parent, parentCollectionPropertyMap, dataMap, direction, source, target);
//find all the collection properties.
var collectionProperties = dataMap.DataMapCollectionList.Select(a=>a.PropertyMap).ToList();
//loop through the collection properties
foreach (var collectionProperty in collectionProperties)
{
var sourceList = collectionProperty.SourcePropertyInfo.TryExtractIDataMapperList(source);
var targetList = collectionProperty.TargetPropertyInfo.TryExtractIDataMapperList(target);
var dataMapForCollection = dataMap.FindDataMapForCollectionProperty(collectionProperty);
var sourceKeyAndObjectList = this.BuildKeyAndObjectPairList(sourceList, dataMapForCollection, true);
var targetKeyAndObjectList = this.BuildKeyAndObjectPairList(targetList, dataMapForCollection, false);
//do the full outer join
var sourceToTargetFullOuterJoin = sourceKeyAndObjectList.FullOuterJoin(
targetKeyAndObjectList,
x => x.Key,
x => x.Key,
(x1, x2) => new Tuple<KeyAndObjectPair<CompositeKey>, KeyAndObjectPair<CompositeKey>>(x1, x2))
.ToList();
//at this point, we have all the things put together for us
foreach (var item in sourceToTargetFullOuterJoin)
{
//yummy recursion
dataMapCommand.Children.Add(
this.BuildCommand(
dataMapCommand,
dataMapForCollection,
collectionProperty,
direction,
item.Item1 == null ? null : item.Item1.Value,
item.Item2 == null ? null : item.Item2.Value));
}
}
return dataMapCommand;
}