public object Clone()
{
AlterTableSQLCommand cmd = new AlterTableSQLCommand(this.TagMapping, this.TableName, this.AlterType);
cmd.ColumnDefinitions = this.ColumnDefinitions.Clone() as ArrayList;
foreach (ForeignKey fk in ForeignKeys)
cmd.ForeignKeys.Add(new ForeignKey(fk.Name, fk.ForeignKeys, fk.ParentTable, fk.ReferenceKeys));
if (this.PrimaryKey != null)
cmd.PrimaryKey = this.PrimaryKey.Clone() as PrimaryKey;
return cmd;
}
public ArrayList CreateInitCommands()
{
_InitCommands = new ArrayList();
ArrayList dropFkCommands = new ArrayList();
ArrayList createFkCommands = new ArrayList();
Hashtable commands = new Hashtable();
foreach (EntityMapping entity in _Mapping.Entities)
{
string type = String.Empty;
// if entity table exist
// true : return entity table
// false : return a new table
if (!commands.Contains(entity.Table))
commands.Add(entity.Table, new CreateTableSQLCommand(entity, entity.Schema, entity.Table));
CreateTableSQLCommand entityTab = (CreateTableSQLCommand)commands[entity.Table];
// add a primary key into entity table
foreach (PrimaryKeyMapping pkm in entity.Ids)
{
AddPrimaryKeysTo(entityTab, entity.GetIdField(pkm), pkm.Generator);
}
// if the entity has a discriminator
// true : add a field into entity table
if (entity.DiscriminatorField != null & entity.DiscriminatorValue != null)
{
AddColumnTo(entityTab, entity.DiscriminatorField, DbType.AnsiString, 255, 0, 0, false, null);
//GeneratorMapping discriminatorGenerator=new GeneratorMapping();
//discriminatorGenerator.Name=GeneratorMapping.GeneratorType.business;
//AddPrimaryKeysTo(entityTab, entity.DiscriminatorField, discriminatorGenerator);
}
// add all fields
if (entity.Attributes != null)
{
foreach (AttributeMapping attribute in entity.Attributes)
{
// if the attribute has a same table to entity
// true : add the field attribute into entity table
if (attribute.Table == entity.Table)
{
AddColumnTo(entityTab, attribute.Field, attribute.DbType, attribute.Size, attribute.Precision, attribute.Scale, attribute.IsNotNull, attribute.DefaultValue);
}
// false : create an attribute table
else
{
// if attribute table exist
// true : return attribute table
// false : return a new table
if (!commands.Contains(attribute.Table))
commands.Add(attribute.Table, new CreateTableSQLCommand(attribute, attribute.Table));
CreateTableSQLCommand attributeTab = (CreateTableSQLCommand)commands[attribute.Table];
// if the attribute has a discriminator
// true : add fields into attribute table
if (attribute.Discriminator != null && attribute.DiscriminatorValue != null)
{
AddColumnTo(attributeTab, attribute.Discriminator, DbType.AnsiString, 255, 0, 0, true, null);
// type = _Dialect.ConvertDbTypeToString( DbType.AnsiString, 255, 0, 0);
// AddColumnTo(attributeTab, "TYPE", type, true, null);
}
// add field attribute into attribute table
AddColumnTo(attributeTab, attribute.Field, attribute.DbType, attribute.Size, attribute.Precision, attribute.Scale, attribute.IsNotNull, attribute.DefaultValue);
// add field containing Id of the entity into attribute table
foreach (PrimaryKeyMapping pkm in entity.Ids)
{
AddForeignKeysTo(attributeTab, attribute.ParentField, entity.GetIdField(pkm), entity.Table, pkm.Generator, null);
}
}
}
}
// add all foreign keys
if (entity.References != null)
{
foreach (ReferenceMapping reference in entity.References)
{
if (reference.Rules != null)
{
for (int index = 0; index < reference.Rules.Count; index++)
{
RuleMapping rule = reference.Rules[index];
if (!commands.Contains(rule.ParentTable))
commands.Add(rule.ParentTable, new CreateTableSQLCommand(rule, rule.ParentTable));
CreateTableSQLCommand parentTable = (CreateTableSQLCommand)commands[rule.ParentTable];
if (!commands.Contains(rule.ChildTable))
commands.Add(rule.ChildTable, new CreateTableSQLCommand(rule, rule.ChildTable));
CreateTableSQLCommand childTable = (CreateTableSQLCommand)commands[rule.ChildTable];
if (reference.DiscriminatorField != null && index == 0)
{
AddColumnTo(childTable, reference.DiscriminatorField, DbType.AnsiString, 36, 0, 0, false, null);
}
// Creates constraints if specified and handled by the dialect
if (_Dialect.GetDisableForeignKeyScope() != DBDialect.ForeignKeyScope.None && rule.Constraint != null && rule.Constraint != String.Empty)
{
AlterTableSQLCommand alter = null;
// Detects the parent of the constraints using the position of he PK
if ((index == 0 && rule.ParentField == reference.EntityParent.IdFields) || (index != 0 && rule.ParentField == reference.Rules[index - 1].ChildField))
{
alter = new AlterTableSQLCommand(null, rule.ChildTable, AlterTypeEnum.Add);
alter.ForeignKeys.Add(new ForeignKey(rule.Constraint, new string[] { rule.ChildField }, rule.ParentTable, new string[] { rule.ParentField }));
}
else
{
alter = new AlterTableSQLCommand(null, rule.ParentTable, AlterTypeEnum.Add);
alter.ForeignKeys.Add(new ForeignKey(rule.Constraint, new string[] { rule.ParentField }, rule.ChildTable, new string[] { rule.ChildField }));
}
createFkCommands.Add(alter);
// Generates the DROP command for this constraint
AlterTableSQLCommand drop = alter.Clone() as AlterTableSQLCommand;
drop.AlterType = AlterTypeEnum.Drop;
dropFkCommands.Add(drop);
}
GeneratorMapping generator = null;
for (int i = 0; i < rule.ParentFields.Length; i++)
{
string parentField = rule.ParentFields[i];
string childField = rule.ChildFields[i];
// create a parentColumn
if (reference.EntityParent.Table == rule.ParentTable && reference.EntityParent.Ids[parentField] != null)
{
generator = reference.EntityParent.Ids[parentField].Generator;
AddPrimaryKeysTo(parentTable, parentField, generator);
if (!string.IsNullOrEmpty(rule.ChildDefaultValue))
AddForeignKeysTo(childTable, childField, parentField, rule.ParentTable, generator, rule.ChildDefaultValues[i]);
else
AddForeignKeysTo(childTable, childField, parentField, rule.ParentTable, generator, null);
}
// create a childColumn
if (_Mapping.Entities[reference.EntityChild].Table == childTable.TableName
&& _Mapping.Entities[reference.EntityChild].Ids[childField] != null)
{
generator = _Mapping.Entities[reference.EntityChild].Ids[childField].Generator;
AddPrimaryKeysTo(childTable, childField, generator);
if (!string.IsNullOrEmpty(rule.ParentDefaultValue))
AddForeignKeysTo(parentTable, parentField, childField, rule.ChildTable, generator, rule.ParentDefaultValues[i]);
else
AddForeignKeysTo(parentTable, parentField, childField, rule.ChildTable, generator, null);
}
}
}
}
}
}
}
_InitCommands.AddRange(dropFkCommands);
_InitCommands.AddRange(commands.Values);
_InitCommands.AddRange(createFkCommands);
return _InitCommands;
}
public void Visit(AlterTableSQLCommand command)
{
_Query.Append(ALTER).Append(TABLE).Append(FormatAttribute(command.TableName)).Append(SPACE);
switch (command.AlterType)
{
case AlterTypeEnum.AlterColumn:
throw new NotImplementedException();
case AlterTypeEnum.Add:
_Query.Append(SPACE).Append(ADD);
break;
case AlterTypeEnum.Drop:
_Query.Append(SPACE).Append(DROP);
break;
}
ArrayList alterList = new ArrayList();
if(command.PrimaryKey != null)
{
string[] pkFields = new string[command.PrimaryKey.Columns.Count];
for (int i = 0; i < pkFields.Length; i++)
pkFields[i] = FormatAttribute(((ColumnDefinition)command.PrimaryKey.Columns[i]).ColumnName);
string constr = String.Concat(SPACE, CONSTRAINT, FormatAttribute(command.PrimaryKey.Name), SPACE);
if (command.AlterType == AlterTypeEnum.Add)
{
constr += String.Concat(SPACE, PRIMARY, KEY, CLUSTERED, OPENBRACE, string.Join(COMMA, pkFields), CLOSEBRACE);
}
alterList.Add(constr);
}
foreach (ForeignKey fk in command.ForeignKeys)
{
string constr = CONSTRAINT;
if(command.AlterType == AlterTypeEnum.Add)
{
string[] foreignFields = (string[])fk.ForeignKeys.Clone();
string[] referenceFields = (string[])fk.ReferenceKeys.Clone();
for(int i=0; i<foreignFields.Length; i++)
{
foreignFields[i] = FormatAttribute(foreignFields[i]);
referenceFields[i] = FormatAttribute(referenceFields[i]);
}
// " {0} FOREIGN KEY ( {1} ) REFERENCES {2} ( {3} )"
constr += string.Concat(SPACE,
FormatAttribute(fk.Name),
SPACE,
FOREIGN, KEY, OPENBRACE, SPACE,
string.Join(COMMA, foreignFields), SPACE,
CLOSEBRACE, REFERENCES, FormatAttribute(fk.ParentTable), SPACE,
OPENBRACE, SPACE, string.Join(COMMA, referenceFields), SPACE, CLOSEBRACE);
}
else if(command.AlterType == AlterTypeEnum.Drop)
{
constr += FormatAttribute(fk.Name);
}
else
throw new ArgumentException("ForeignKeys");
alterList.Add(constr);
}
_Query.Append(String.Join(COMMA, (string[])alterList.ToArray(typeof(string))));
}
