public void Process(DeleteReferenceCommand c)
{
ReferenceMapping referenceMapping = null;
if (!string.IsNullOrEmpty(c.ChildType))
referenceMapping = _Mapping.Entities[c.ParentType, true].References[c.Role, c.ChildType];
else
referenceMapping = _Mapping.Entities[c.ParentType, true].References[c.Role];
if (referenceMapping == null)
{
Evaluant.Uss.Models.Entity current = _Engine.Model.GetEntity(c.ParentType);
while (referenceMapping == null && current != null)
{
Evaluant.Uss.Models.Entity currentChild = _Engine.Model.GetEntity(c.ChildType);
while (referenceMapping == null && currentChild != null)
{
referenceMapping = _Mapping.Entities[current.Type, true].References[c.Role, current.Type, currentChild.Type];
currentChild = _Engine.Model.GetParent(currentChild);
}
if (referenceMapping == null)
current = _Engine.Model.GetParent(current);
}
}
if (referenceMapping == null)
throw new Exception(String.Format("The reference '{0}' of the entity '{1}' is not defined in your mapping file", c.Role, c.ParentType));
EntityMapping parentMapping = referenceMapping.EntityParent;
EntityMapping childMapping = _Mapping.Entities[referenceMapping.EntityChild, true];
RuleMappingCollection rules = referenceMapping.Rules;
bool isParentRefered = true;
// Delete all records to index tables
for (int index = 0; index < rules.Count; index++)
{
ISQLExpression query = null;
//if first rule : ParentField is a foreign key ==> update parent table
if ((index == 0) && (rules[index].ParentField != parentMapping.IdFields))
{
// UPDATE parenttable SET FK_column = NULL WHERE PK_Column = PK_Value
query = new UpdateCommand(rules[index], rules[index].ParentTable);
for (int i = 0; i < rules[index].ParentFields.Length; i++)
{
if (parentMapping.Ids[rules[index].ParentFields[i]] == null)
{
Constant constant = new Constant(DBNull.Value, _Dialect.GetDbTypeToPrimaryKey(childMapping.Ids[i].Generator));
if (rules[index].ParentDefaultValues.Length > i && !string.IsNullOrEmpty(rules[index].ParentDefaultValues[i]))
constant = new Constant(rules[index].ParentDefaultValues[i], _Dialect.GetDbTypeToPrimaryKey(childMapping.Ids[i].Generator));
((UpdateCommand)query).ColumnValueCollection.Add(rules[index].ParentFields[i], constant);
}
}
for (int i = 0; i < parentMapping.Ids.Count; i++)
{
string PK_Column = parentMapping.IdFields.Split(SqlMapperProvider.IDSEP)[i];
string PK_Value = ConvertId(parentMapping, PK_Column, c.ParentId);
((UpdateCommand)query).WhereClause.SearchCondition.Add(new BinaryLogicExpression(
new Column(parentMapping.Ids[i], PK_Column),
BinaryLogicOperator.Equals,
new Constant(PK_Value, _Dialect.GetDbTypeToPrimaryKey(parentMapping.Ids[i].Generator))));
}
ExecuteCommand(query);
}
//if last rule : ChildField is a foreign key ==> update child table
if ((index == rules.Count - 1) && (rules[index].ChildField != childMapping.IdFields))
{
// UPDATE childtable SET FK_column = NULL WHERE PK_Column = PK_Value
query = new UpdateCommand(rules[index], rules[index].ChildTable);
for (int i = 0; i < rules[index].ChildFields.Length; i++)
{
if (childMapping.Ids[rules[index].ChildFields[i]] == null)
{
Constant constant = new Constant(DBNull.Value, _Dialect.GetDbTypeToPrimaryKey(parentMapping.Ids[i].Generator));
if (rules[index].ChildDefaultValues.Length > i && !string.IsNullOrEmpty(rules[index].ChildDefaultValues[i]))
constant = new Constant(rules[index].ChildDefaultValues[i], _Dialect.GetDbTypeToPrimaryKey(parentMapping.Ids[i].Generator));
((UpdateCommand)query).ColumnValueCollection.Add(rules[index].ChildFields[i], constant);
}
}
for (int i = 0; i < childMapping.Ids.Count; i++)
((UpdateCommand)query).WhereClause.SearchCondition.Add(new BinaryLogicExpression(
new Column(childMapping.Ids[i], childMapping.IdFields.Split(SqlMapperProvider.IDSEP)[i]),
BinaryLogicOperator.Equals,
new Constant(ConvertId(childMapping, childMapping.IdFields.Split(SqlMapperProvider.IDSEP)[i], c.ChildId), _Dialect.GetDbTypeToPrimaryKey(childMapping.Ids[i].Generator))));
//PrimaryKeyMapping PK_mapping = index == 0 ? parentMapping.Ids[0] : childMapping.Ids[0];
//string PK_column = childMapping.IdFields;
//string PK_value = c.ChildId;
ExecuteCommand(query);
}
// Execute a delete command to index table
if (index != rules.Count - 1)
{
// Delete records to index table with one foreign key : rule(n).ChildField == rule(n+1).ParentField
if (rules[index].ChildField == rules[index + 1].ParentField)
{
// the refered table is parent table ==> WHERE rule(n).ChildField == ParentId
if (isParentRefered)
{
query = new DeleteCommand(rules[index], rules[index].ChildTable);
((DeleteCommand)query).Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(rules[index], rules[index].ChildField),
BinaryLogicOperator.Equals,
new Constant(c.ParentId, _Dialect.GetDbTypeToPrimaryKey(parentMapping.Ids[0].Generator))));
}
// the refered table is child table ==> WHERE rule(n).ChildField == ChildId
else
{
query = new DeleteCommand(rules[index], rules[index].ChildTable);
((DeleteCommand)query).Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(rules[index], rules[index].ChildField),
BinaryLogicOperator.Equals,
new Constant(c.ChildId, _Dialect.GetDbTypeToPrimaryKey(childMapping.Ids[0].Generator))));
}
}
// Delete records to index table with two foreign key : rule(n).ChildField != rule(n+1).ParentField
else
{
query = new DeleteCommand(rules[index], rules[index].ChildTable);
((DeleteCommand)query).Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(rules[index], rules[index].ChildField),
BinaryLogicOperator.Equals,
new Constant(c.ParentId, _Dialect.GetDbTypeToPrimaryKey(parentMapping.Ids[0].Generator))));
((DeleteCommand)query).Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(rules[index + 1], rules[index + 1].ParentField),
BinaryLogicOperator.Equals,
new Constant(c.ChildId, _Dialect.GetDbTypeToPrimaryKey(childMapping.Ids[0].Generator))));
isParentRefered = false;
}
ExecuteCommand(query);
}
}
}
public void Process(DeleteEntityCommand c)
{
EntityMapping deleteEntityMapping = _Mapping.Entities[c.Type, true];
Hashtable cmds = new Hashtable();
foreach (ReferenceMapping refm in deleteEntityMapping.References)
{
Evaluant.Uss.Models.Reference reference = _Engine.Model.GetReference(c.Type, refm.Name);
EntityMapping entityChildMapping = _Mapping.Entities[refm.EntityChild];
if (!reference.ToMany)
continue;
foreach (RuleMapping rulem in refm.Rules)
{
if (rulem.ParentTable == deleteEntityMapping.Table)
{
// update child table
SQLCommand cmd = (SQLCommand)cmds[rulem.ChildTable];
EntityMapping childEntity = _Mapping.Entities[refm.EntityChild];
if (!reference.IsComposition && rulem.ChildTable == childEntity.Table)
{
if (cmd == null)
{
cmd = new UpdateCommand(rulem, rulem.ChildTable);
cmds.Add(rulem.ChildTable, cmd);
}
}
else
{
if (cmd == null)
{
cmd = new DeleteCommand(rulem, rulem.ChildTable);
cmds.Add(rulem.ChildTable, cmd);
}
}
//if (cmd is DeleteCommand)
// continue;
for (int i = 0; i < rulem.ParentFields.Length; i++)
{
DbType dbType;
if (deleteEntityMapping.IdFields.Contains(refm.Rules[0].ParentFields[i]))
{
dbType = _Dialect.GetDbTypeToPrimaryKey(deleteEntityMapping.Ids[refm.Rules[0].ParentFields[i]].Generator);
}
else
{
dbType = _Dialect.GetDbTypeToPrimaryKey(childEntity.Ids[refm.Rules[0].ChildFields[i]].Generator);
}
Constant newValue;
if (rulem.ParentDefaultValues.Length > i && !string.IsNullOrEmpty(rulem.ParentDefaultValues[i]))
newValue = new Constant(rulem.ParentDefaultValues[i], dbType);
else
newValue = new Constant(DBNull.Value, dbType);
// SSX 28/01/08: add contains test
if (entityChildMapping.Ids[rulem.ChildFields[i]] == null && cmd is UpdateCommand
&& !((UpdateCommand)cmd).ColumnValueCollection.Contains(rulem.ChildFields[i]))
((UpdateCommand)cmd).ColumnValueCollection.Add(rulem.ChildFields[i], newValue);
Column childField = new Column(rulem, rulem.ChildFields[i]);
Constant childParameter = new Constant(ConvertId(deleteEntityMapping, rulem.ParentFields[i], c.ParentId), dbType);
BinaryLogicExpression parentClause = new BinaryLogicExpression(childField, BinaryLogicOperator.Equals, childParameter);
if (cmd is UpdateCommand)
((UpdateCommand)cmd).WhereClause.SearchCondition.Add(parentClause);
else
((DeleteCommand)cmd).Condition.SearchCondition.Add(parentClause);
}
if (!string.IsNullOrEmpty(rulem.Constraint))
DisableForeignKeys(rulem.ChildTable);
}
}
}
// Deletes all references to and from it first
foreach (EntityMapping em in _Mapping.Entities)
{
foreach (ReferenceMapping refm in em.References)
{
//Evaluant.Uss.Models.Model childModel = _Engine.Model.GetEntity(
if (refm.EntityChild == deleteEntityMapping.Type) // To
{
for (int indexRule = 0; indexRule < refm.Rules.Count; indexRule++)
{
RuleMapping rulem = refm.Rules[indexRule];
if ((rulem.ChildField == deleteEntityMapping.IdFields &&
deleteEntityMapping.DiscriminatorField == null) ||
(rulem.ChildField + ";" + deleteEntityMapping.DiscriminatorField == deleteEntityMapping.IdFields &&
deleteEntityMapping.DiscriminatorField != null))
{
// delete childtable
if (cmds.ContainsKey(rulem.ChildTable))
continue;
DeleteCommand cmd = new DeleteCommand(rulem, rulem.ChildTable);
cmds.Add(rulem.ChildTable, cmd);
for (int index = 0; index < rulem.ChildFields.Length; index++)
{
DbType dbType = _Dialect.GetDbTypeToPrimaryKey(deleteEntityMapping.Ids[index].Generator);
cmd.Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(rulem, rulem.ChildFields[index]),
BinaryLogicOperator.Equals,
new Constant(ConvertId(deleteEntityMapping, rulem.ChildFields[index], c.ParentId), dbType)
));
}
if (!string.IsNullOrEmpty(refm.DiscriminatorField) && indexRule == refm.Rules.Count - 1)
{
cmd.Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(rulem, refm.DiscriminatorField),
BinaryLogicOperator.Equals,
new Parameter(rulem, refm.DiscriminatorValue)
));
}
if (!string.IsNullOrEmpty(rulem.Constraint))
DisableForeignKeys(rulem.ChildTable);
}
if (rulem.ParentField != em.IdFields && em.DiscriminatorField != null
|| rulem.ParentTable != em.Table)
{
// update parent table
SQLCommand cmd = (SQLCommand)cmds[rulem.ParentTable];
if (cmd == null)
{
cmd = new UpdateCommand(rulem, rulem.ParentTable);
cmds.Add(rulem.ParentTable, cmd);
}
if (cmd is DeleteCommand)
continue;
for (int i = 0; i < rulem.ParentFields.Length; i++)
{
DbType dbType = _Dialect.GetDbTypeToPrimaryKey(deleteEntityMapping.Ids[i].Generator);
Constant newValue = new Constant(DBNull.Value, dbType);
if (rulem.ParentDefaultValues.Length > i && !string.IsNullOrEmpty(rulem.ParentDefaultValues[i]))
newValue = new Constant(rulem.ParentDefaultValues[i], dbType);
// SSX 28/01/08: add contains test
if (em.Ids[rulem.ParentFields[i]] == null
&& !((UpdateCommand)cmd).ColumnValueCollection.Contains(rulem.ParentFields[i]))
((UpdateCommand)cmd).ColumnValueCollection.Add(rulem.ParentFields[i], newValue);
Column parentField = new Column(rulem, rulem.ParentFields[i]);
Constant parentParameter = new Constant(ConvertId(deleteEntityMapping, rulem.ParentFields[i], c.ParentId), dbType);
BinaryLogicExpression parentClause = new BinaryLogicExpression(parentField, BinaryLogicOperator.Equals, parentParameter);
((UpdateCommand)cmd).WhereClause.SearchCondition.Add(parentClause);
}
// UPDATE parentTable SET parentField = NULL WHERE (parentField = @parentValue AND discriminator = 'name's relation')
if (!string.IsNullOrEmpty(refm.DiscriminatorField) && indexRule == refm.Rules.Count - 1)
{
Column discriminatorField = new Column(rulem, rulem.ParentField);
Constant discriminatorValue = new Constant(refm.DiscriminatorValue, DbType.AnsiString);
BinaryLogicExpression discriminatorClause = new BinaryLogicExpression(discriminatorField, BinaryLogicOperator.Equals, discriminatorValue);
((UpdateCommand)cmd).WhereClause.SearchCondition.Add(discriminatorClause);
}
if (!string.IsNullOrEmpty(rulem.Constraint))
DisableForeignKeys(rulem.ParentTable);
}
}
}
}
}
// Deletes all attributes if they are in a separate table
if (deleteEntityMapping.Attributes != null)
{
foreach (AttributeMapping am in deleteEntityMapping.Attributes)
{
if (am.Table != deleteEntityMapping.Table)
{
DeleteCommand cmd = new DeleteCommand(am, am.Table);
for (int index = 0; index < deleteEntityMapping.Ids.Count; index++)
{
PrimaryKeyMapping pkm = deleteEntityMapping.Ids[index];
cmd.Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(am, am.ParentFields[index]),
BinaryLogicOperator.Equals,
new Constant(ConvertId(deleteEntityMapping, pkm.Field, c.ParentId), _Dialect.GetDbTypeToPrimaryKey(pkm.Generator))));
}
cmds.Add(am.Table, cmd);
}
}
}
// SSX 28/01/08: remove table if already existing
if (cmds.Contains(deleteEntityMapping.Table))
{
cmds.Remove(deleteEntityMapping.Table);
}
if (!cmds.ContainsKey(deleteEntityMapping.Table))
{
DeleteCommand cmd = new DeleteCommand(deleteEntityMapping, deleteEntityMapping.Table);
for (int index = 0; index < deleteEntityMapping.Ids.Count; index++)
{
PrimaryKeyMapping pkm = deleteEntityMapping.Ids[index];
cmd.Condition.SearchCondition.Add(new BinaryLogicExpression(
new Column(deleteEntityMapping, pkm.Field),
BinaryLogicOperator.Equals,
new Constant(ConvertId(deleteEntityMapping, pkm.Field, c.ParentId), _Dialect.GetDbTypeToPrimaryKey(pkm.Generator))));
}
cmds.Add(deleteEntityMapping.Table, cmd);
}
foreach (string tableName in cmds.Keys)
{
foreach (string query in _Dialect.RenderQueries((ISQLExpression)cmds[tableName]))
{
if (!string.IsNullOrEmpty(query))
{
IDbCommand cmd = _Driver.CreateCommand(query, _Connection, _Transaction);
if (_Engine.TraceSqlSwitch.Enabled)
TraceHelpler.Trace(cmd, _Dialect);
cmd.ExecuteNonQuery();
}
}
}
}
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 virtual void Visit(UpdateCommand updateCommand)
{
if (updateCommand.ColumnValueCollection.Count != 0)
{
_Query.Append(UPDATE).Append(FormatAttribute(updateCommand.TableName)).Append(SPACE).Append(SET);
SortedList coll = updateCommand.ColumnValueCollection;
foreach (string key in coll.Keys)
{
_Query.Append(FormatAttribute(key)).Append(" = ");
((ISQLExpression)coll[key]).Accept(this);
if (coll.Keys.Count - 1 != coll.IndexOfKey(key))
_Query.Append(COMMA);
}
updateCommand.WhereClause.Accept(this);
}
}
