public void Process(DeleteAttributeCommand c)
{
XmlNode entityAttribute = FindAttribute(GetKey(c.ParentType, c.ParentId), c.Name);
if(entityAttribute == null)
throw new Exception("Unknown Attribute");
entityAttribute.ParentNode.RemoveChild(entityAttribute);
}
public void Process(UpdateAttributeCommand c)
{
XmlNode entityAttribute = FindAttribute(GetKey(c.ParentType, c.ParentId), c.Name);
if(entityAttribute == null)
{
Process(new CreateAttributeCommand(c.ParentId, c.ParentType, c.Name, c.Type, c.Value));
return;
}
// Treat null values as a DeleteAttributeCommand in this engine
if(c.Value == null)
{
DeleteAttributeCommand dac = new DeleteAttributeCommand(c.ParentId, c.ParentType, c.Name, c.Type, c.Value);
Process(dac);
return;
}
if (Utils.IsStandardType(c.Type)) // string is not a ValueType
entityAttribute.InnerText = Utils.ConvertToString(c.Value, c.Type);
else
entityAttribute.InnerText = Utils.SerializeToString(c.Value);
}
internal Command CreateCommand(Entity e)
{
switch (e.Type)
{
case SyncUtils.CREATE_ENTITY:
CreateEntityCommand ce = new CreateEntityCommand(
e.GetString(SyncUtils.PARENTID),
e.GetString(SyncUtils.TYPE)
);
return ce;
case SyncUtils.DELETE_ENTITY:
DeleteEntityCommand de = new DeleteEntityCommand(
e.GetString(SyncUtils.PARENTID),
e.GetString(SyncUtils.TYPE)
);
return de;
case SyncUtils.CREATE_ATTRIBUTE:
CreateAttributeCommand ca = new CreateAttributeCommand(
e.GetString(SyncUtils.PARENTID),
e.GetString(SyncUtils.PARENTTYPE),
e.GetString(SyncUtils.NAME),
MetaData.TypeResolver.GetType(e.GetString(SyncUtils.TYPE)),
Factory.Serializer.Unserialize(e.GetString(SyncUtils.VALUE))
);
return ca;
case SyncUtils.DELETE_ATTRIBUTE:
DeleteAttributeCommand da = new DeleteAttributeCommand(
e.GetString(SyncUtils.PARENTID),
e.GetString(SyncUtils.PARENTTYPE),
e.GetString(SyncUtils.NAME),
MetaData.TypeResolver.GetType(e.GetString(SyncUtils.TYPE)),
null
);
return da;
case SyncUtils.UPDATE_ATTRIBUTE:
UpdateAttributeCommand ua = new UpdateAttributeCommand(
e.GetString(SyncUtils.PARENTID),
e.GetString(SyncUtils.PARENTTYPE),
e.GetString(SyncUtils.NAME),
MetaData.TypeResolver.GetType(e.GetString(SyncUtils.TYPE)),
Factory.Serializer.Unserialize(e.GetString(SyncUtils.VALUE))
);
return ua;
case SyncUtils.CREATE_REFERENCE:
CreateReferenceCommand cr = new CreateReferenceCommand(
e.GetString(SyncUtils.ROLE),
e.GetString(SyncUtils.PARENTID),
e.GetString(SyncUtils.PARENTTYPE),
e.GetString(SyncUtils.CHILDID),
e.GetString(SyncUtils.CHILDTYPE)
);
return cr;
case SyncUtils.DELETE_REFERENCE:
DeleteReferenceCommand dr = new DeleteReferenceCommand(
e.GetString(SyncUtils.ROLE),
e.GetString(SyncUtils.PARENTID),
e.GetString(SyncUtils.PARENTTYPE),
e.GetString(SyncUtils.CHILDID),
e.GetString(SyncUtils.CHILDTYPE)
);
return dr;
default:
throw new UniversalStorageException("Unexpected command type");
}
}
public override DeleteAttributeCommand Visit(DeleteAttributeCommand c)
{
_RWL.AcquireWriterLock();
try
{
Entity entity = GetEntity(c.ParentType, c.ParentId);
State tmpState = entity.State;
entity.Remove(c.Name);
entity.State = tmpState;
}
finally
{
_RWL.ReleaseWriterLock();
}
return c;
}
public override DeleteAttributeCommand Visit(DeleteAttributeCommand c)
{
Entity e = new Entity(SyncUtils.DELETE_ATTRIBUTE);
PopulateDefaults(e, c);
e.SetValue(SyncUtils.PARENTID, c.ParentId);
e.SetValue(SyncUtils.PARENTTYPE, c.ParentType);
e.SetValue(SyncUtils.NAME, c.Name);
e.SetValue(SyncUtils.TYPE, c.Type.Name);
transaction.Serialize(e);
return c;
}
public void Process(DeleteAttributeCommand c)
{
EntityMapping e = _Mapping.Entities[c.ParentType, true];
AttributeMapping a = e.Attributes[c.Name, true];
IDbCommand command;
// Specific case
if (a.Table == null | e.Table == a.Table)
{
UpdateCommand upd = new UpdateCommand(a, e.Table);
upd.ColumnValueCollection.Add(a.Field, new Constant(DBNull.Value, a.DbType));
upd.WhereClause.SearchCondition.Add(new BinaryLogicExpression(new Column(a, e.IdFields), BinaryLogicOperator.Equals, new Parameter(null, "Id")));
upd.Accept(_Dialect);
command = _Driver.CreateCommand(_Dialect.RenderQueries(upd)[0], _Connection, _Transaction);
/*command = _Driver.CreateCommand(String.Format(@"UPDATE {0} SET {1} = NULL WHERE ({2} = {3})",
_Dialect.FormatAttribute(e.Table),
_Dialect.FormatAttribute(a.Field),
_Dialect.FormatAttribute(e.IdFields),
_Driver.FormatParameter("Id")), _Connection, _Transaction);*/
string parentid = ConvertId(e.Ids[0].Generator, c.ParentId).ToString();
command.Parameters.Add(_Driver.CreateParameter("Id", _Dialect.GetDbTypeToPrimaryKey(e.Ids[0].Generator), parentid));
}
// Generic case
else
{
if (a.Discriminator != null)
{
command = _Driver.CreateCommand(String.Format(@"DELETE FROM {0} WHERE ({1} = {3} and {2} = {4})",
_Dialect.FormatAttribute(a.Table),
_Dialect.FormatAttribute(a.Discriminator),
_Dialect.FormatAttribute(a.ParentField),
_Driver.FormatParameter("Name"),
_Driver.FormatParameter("FK_Entity")), _Connection, _Transaction);
command.Parameters.Add(_Driver.CreateParameter("Name", DbType.AnsiString, c.Name));
string parentid = ConvertId(e.Ids[0].Generator, c.ParentId).ToString();
command.Parameters.Add(_Driver.CreateParameter("FK_Entity", _Dialect.GetDbTypeToPrimaryKey(e.Ids[0].Generator), parentid));
}
else
{
command = _Driver.CreateCommand(String.Format(@"DELETE FROM {0} WHERE ({1} = {2})",
_Dialect.FormatAttribute(a.Table),
_Dialect.FormatAttribute(a.ParentField),
_Driver.FormatParameter("FK_Entity")), _Connection, _Transaction);
string parentid = ConvertId(e.Ids[0].Generator, c.ParentId).ToString();
command.Parameters.Add(_Driver.CreateParameter("FK_Entity", _Dialect.GetDbTypeToPrimaryKey(e.Ids[0].Generator), parentid));
}
}
command.Transaction = _Transaction;
if (_Engine.TraceSqlSwitch.Enabled)
{
TraceHelpler.Trace(command, _Dialect);
}
command.ExecuteNonQuery();
}
public UpdateAttributeCommand Visit(UpdateAttributeCommand c)
{
XmlNode entityAttribute = FindAttribute(GetKey(c.ParentType, c.ParentId), c.Name);
if (entityAttribute == null)
{
Visit(new CreateAttributeCommand(c.ParentId, c.ParentType, c.Name, c.Type, c.Value));
return c;
}
// Treat null values as a DeleteAttributeCommand in this engine
if (c.Value == null)
{
DeleteAttributeCommand dac = new DeleteAttributeCommand(c.ParentId, c.ParentType, c.Name, c.Type, c.Value);
Visit(dac);
return c;
}
entityAttribute.InnerText = engine.Factory.Serializer.SerializeToString(c.Value);
return c;
}
public abstract DeleteAttributeCommand Visit(DeleteAttributeCommand item);
public override DeleteAttributeCommand Visit(DeleteAttributeCommand c)
{
_RWL.AcquireWriterLock(Timeout.Infinite);
try
{
Entity entity = _Entities[CacheEngine.GetCacheKey(c.ParentType, c.ParentId)];
if (entity == null)
return c;
State tmpState = entity.State;
entity.Remove(c.Name);
entity.State = tmpState;
}
finally
{
_RWL.ReleaseWriterLock();
}
return c;
}
