/// <summary>
/// return if we can saturate this table
/// </summary>
/// <returns></returns>
public override bool CanSaturate()
{
//parse the relationship in which we are the relation table
foreach (var rel in Catalog.CatalogMetadata.Relationships.Values.Where(r => r.RelationTableName == TableMetadata.TableName).ToList())
{
//get the parent table for this bucket
IBucketDataTable parent = Bucket.BucketDataTables[rel.ParentTableName];
//check that it has saturated
if (!parent.Saturated)
{
return(false);
}
}
return(true);
}
/// <summary>
/// add data item to the table
/// </summary>
/// <param name="item"></param>
public bool AddItem(IDataItem item)
{
object obj;
bool bRet = false;
//check if table type to handle relations
if (this is RelationshipDataTable)
{
//parse the table's relationships
RelationshipDataTable rel_table = this as RelationshipDataTable;
//get the fields
long parent_id = Convert.ToInt64(item.GetType().GetField(rel_table.RelationshipMetadata.ParentRelationshipField).GetValue(item));
long child_id = Convert.ToInt64(item.GetType().GetField(rel_table.RelationshipMetadata.ChildRelationshipField).GetValue(item));
//lock the resource
lock (rel_table.RelationshipParentLookup)
{
//add the relation
//if (ReferenceEquals(AddOrUpdate(item.PrimaryKey, item), item))
{
//look for the parent item
IBucketDataTable bucket_table = rel_table.Bucket.BucketDataTables[rel_table.RelationshipMetadata.ParentTable.TableName];
IDataItem parent_item;
if (bucket_table.TryGetValue(parent_id, bucket_table.TableMetadata.DataType, out obj))
{
//add to the parent item
parent_item = (IDataItem)obj;
//List<long> list = (List<long>)parent_item.GetType().GetField(rel_table.RelationshipMetadata.ParentChildCollection).GetValue(parent_item);
List <Tuple <List <long>, long> > list = (List <Tuple <List <long>, long> >)parent_item.GetType().GetField(rel_table.RelationshipMetadata.ParentChildCollection).GetValue(parent_item);
lock (parent_item)
{
try
{
//check the list to init
if (list == null)
{
list = new List <Tuple <List <long>, long> >();
}
//check for no items
if (list.Count == 0)
{
List <long> sub_list = new List <long>();
sub_list.Add(item.PrimaryKey);
list.Add(new Tuple <List <long>, long>(sub_list, child_id));
bRet = true;
}
else
{
//get the sub list
var tuple = list.FirstOrDefault(t => t.Item2 == child_id);
if (tuple == null)
{
List <long> sub_list = new List <long>();
sub_list.Add(item.PrimaryKey);
list.Add(new Tuple <List <long>, long>(sub_list, child_id));
bRet = true;
}
else
{
//is this a distinct relationship
if (rel_table.RelationshipMetadata.DistinctRelationship)
{
//check if item is already added
if (!tuple.Item1.Contains(item.PrimaryKey))
{
tuple.Item1.Add(item.PrimaryKey);
bRet = true;
}
}
else
{
if (!list.Any(t => t.Item1.Contains(item.PrimaryKey)))
{
List <long> sub_list = new List <long>();
sub_list.Add(item.PrimaryKey);
list.Add(new Tuple <List <long>, long>(sub_list, child_id));
bRet = true;
}
}
}
}
//check if should update the field
if (bRet)
{
parent_item.GetType().GetField(rel_table.RelationshipMetadata.ParentChildCollection).SetValue(parent_item, list);
}
//if (!list.Any(t => t.Item2 == child_id))
//{
// List<long> sub_list = new List<long>();
// sub_list.Add(item.PrimaryKey);
// list.Add(new Tuple<List<long>, long>(sub_list, child_id));
// if (rel_table.RelationshipMetadata.DistinctRelationship)
// parent_item.GetType().GetField(rel_table.RelationshipMetadata.ParentChildCollection).SetValue(parent_item, list);
// bRet = true;
//}
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine(ex.ToString());
}
}
}
else
{
//update the lookup
//rel_table.RelationshipParentLookup.AddOrUpdate
// (
// parent_id,
// new ConcurrentDictionary<long, long>
// (
// new KeyValuePair<long, long>[]
// {
// new KeyValuePair<long, long>
// (
// item.PrimaryKey,
// child_id
// )
// }
// ),
// (x, y) =>
// {
// y.AddOrUpdate
// (
// item.PrimaryKey,
// child_id,
// (j, k) => { return k; }
// );
// return y;
// }
// );
}
}
}
////update the parent collection
//IBucketDataTable bucket_table = rel_table.Bucket.BucketDataTables[rel_table.RelationshipMetadata.ParentTable.TableName];
//IDataItem parent_item;
//if (bucket_table.TryGetValue(parent_id, bucket_table.TableMetadata.DataType, out obj))
//{
// parent_item = (IDataItem)obj;
// parent_item.GetType().GetField(rel_table.RelationshipMetadata.ParentChildCollection).SetValue(parent_item, rel_table.GetChildList(parent_id));
//}
}
else if (this is BucketDataTable)
{
//cast the table
BucketDataTable bucket_table = this as BucketDataTable;
//add the bucket reference
object objItem = AddOrUpdate(item.PrimaryKey, item);
if (ReferenceEquals(objItem, item))
{
//parse the table's relationships
//foreach (RelationshipMetadata rel in this.TableMetadata.CatalogMetadata.Relationships.Where(r => r.Value.ParentTable.TableName == TableMetadata.TableName).Select(r => r.Value))
//{
// //get the relationship table
// RelationshipDataTable rel_table = bucket_table.Bucket.BucketDataTables[rel.RelationTable.TableName] as RelationshipDataTable;
// //lock the resource
// lock (rel_table.RelationshipParentLookup)
// {
// //remove the lookup
// ConcurrentDictionary<long, long> lookup;
// if (rel_table.RelationshipParentLookup.TryGetValue(item.PrimaryKey, out lookup))
// {
// //set the child collection
// item.GetType().GetField(rel.ParentChildCollection).SetValue(item, rel_table.GetChildList(item.PrimaryKey));
// //remove the list
// rel_table.RelationshipParentLookup.TryRemove(item.PrimaryKey, out lookup);
// }
// }
//}
bRet = true;
}
else
{
bRet = false;
//parse the table's relationships
//foreach (RelationshipMetadata rel in this.TableMetadata.CatalogMetadata.Relationships.Where(r => r.Value.ParentTable.TableName == TableMetadata.TableName).Select(r => r.Value))
//{
// //get the relationship table
// RelationshipDataTable rel_table = bucket_table.Bucket.BucketDataTables[rel.RelationTable.TableName] as RelationshipDataTable;
// //lock the resource
// lock (rel_table.RelationshipParentLookup)
// {
// //copy the collection
// item.GetType().GetField(rel.ParentChildCollection).SetValue(item, objItem.GetType().GetField(rel.ParentChildCollection).GetValue(objItem));
// }
//}
}
//update our catalog
var catalog_table = this.TableMetadata.CatalogMetadata.Catalog.CatalogDataTables[this.TableMetadata.TableName];
catalog_table.AddOrUpdate(item.PrimaryKey, item);
}
else
{
string test = "test";
}
return(bRet);
}
/// <summary>
/// delete an item and its references
/// </summary>
/// <param name="item"></param>
/// <param name="table"></param>
private void DeleteItem(IDataItem item, IReferenceDataTable table, bool HardDelete)
{
//remove from table
object objTable;
object objCatalog;
IDataItem removed;
//check we need to handle relationship
if (table is RelationshipDataTable)
{
//parse the table's relationships
RelationshipDataTable rel_table = table as RelationshipDataTable;
//get the fields
long parent_id = Convert.ToInt64(item.GetType().GetField(rel_table.RelationshipMetadata.ParentRelationshipField).GetValue(item));
long child_id = Convert.ToInt64(item.GetType().GetField(rel_table.RelationshipMetadata.ChildRelationshipField).GetValue(item));
//lock the resource
lock (rel_table.RelationshipParentLookup)
{
//remove the item
if (table.TryRemove(item.PrimaryKey, table.TableMetadata.DataType, out objTable))
{
removed = (IDataItem)objTable;
}
//check if this is a hard delete
//HardDelete removes the relations
//SoftDelete leave the references
if (HardDelete)
{
//remove this relation
ConcurrentDictionary <long, long> lookup;
if (rel_table.RelationshipParentLookup.TryGetValue(parent_id, out lookup))
{
//remove all lookup entries for association
long id;
bool found = true;
while (found)
{
found = lookup.TryRemove(item.PrimaryKey, out id);
}
if (lookup.Count == 0)
{
//remove the lookup for this parent
if (rel_table.RelationshipParentLookup.TryRemove(parent_id, out lookup))
{
//lookup.Clear();
//lookup = null;
}
}
}
//get the parent item
object objParent;
IDataItem parent_item;
//dynamic parent_item;
IBucketDataTable parent_table = rel_table.Bucket.BucketDataTables[rel_table.RelationshipMetadata.ParentTable.TableName];
if (parent_table.TryGetValue(parent_id, parent_table.TableMetadata.DataType, out objParent))
{
parent_item = (IDataItem)objParent;
//parent_item.GetType().GetField(rel_table.RelationshipMetadata.ParentChildCollection).SetValue(parent_item, rel_table.GetChildList(parent_id));
var list = (List <Tuple <List <long>, long> >)parent_item.GetType().GetField(rel_table.RelationshipMetadata.ParentChildCollection).GetValue(parent_item);
if (rel_table.RelationshipMetadata.DistinctRelationship)
{
var rel_item = list.FirstOrDefault(t => t.Item2 == child_id);
if (rel_item != null)
{
if (rel_item.Item1.Contains(item.PrimaryKey))
{
rel_item.Item1.Remove(item.PrimaryKey);
}
if (rel_item.Item1.Count == 0)
{
list.Remove(rel_item);
}
}
}
else
{
var rel_item = list.FirstOrDefault(t => t.Item1.Any(l => l == item.PrimaryKey));
if (rel_item != null)
{
list.Remove(rel_item);
}
}
}
}
}
//if(rel_table.DataItems.Count % 1000 == 0)
//{
// System.Diagnostics.Trace.WriteLine(
// string.Format(
// "Lookup Status - Catalog:{0}, Table:{1}, TableCount:{2}, LookupCount:{3}",
// rel_table.TableMetadata.CatalogMetadata.Catalog.CatalogName,
// rel_table.TableMetadata.TableName,
// rel_table.DataItems.Count,
// rel_table.RelationshipParentLookup.Count));
//}
}
else if (table is BucketDataTable)
{
//remove the item
if (table.TryRemove(item.PrimaryKey, table.TableMetadata.DataType, out objTable))
{
removed = (IDataItem)objTable;
}
//parse the table's relationships
BucketDataTable bucket_table = table as BucketDataTable;
foreach (RelationshipMetadata rel in table.Catalog.CatalogMetadata.Relationships.Where(r => r.Value.ParentTable.TableName == table.TableMetadata.TableName).Select(r => r.Value))
{
//get the relationship table
RelationshipDataTable rel_table = bucket_table.Bucket.BucketDataTables[rel.RelationTable.TableName] as RelationshipDataTable;
//lock the resource
lock (rel_table.RelationshipParentLookup)
{
//remove the lookup for this parent
ConcurrentDictionary <long, long> lookup;
if (rel_table.RelationshipParentLookup.TryRemove(item.PrimaryKey, out lookup))
{
lookup.Clear();
lookup = null;
}
}
}
}
//remove from catalog
if (table.Catalog.CatalogDataTables[table.TableMetadata.TableName].TryRemove(item.PrimaryKey, table.TableMetadata.DataType, out objCatalog))
{
removed = (IDataItem)objCatalog;
}
}
