/// <summary>
/// Adds the elements of an array to the end of this ColumnCollection.
/// </summary>
/// <param name="items">
/// The array whose elements are to be added to the end of this ColumnCollection.
/// </param>
public virtual void AddRange(OrderByClauseColumn[] items)
{
foreach (OrderByClauseColumn item in items)
{
this.List.Add(item);
}
}
public ISQLExpression TransformToSql(Path path, string[] attributes, string[] orderby, bool lastIsAttribute)
{
// Get all the entity of the hierarchy (parent and children)
string baseType = path.Identifiers[0].Value;
IList tree = _Model.GetTree(baseType);
_UserAttributes = new StringCollection();
// attributes == null => don't get attributes
if (attributes != null)
{
// Get the specified class and store all the inherited classes
Evaluant.Uss.Models.Entity parent = null;
Evaluant.Uss.Models.EntityCollection parents = new Evaluant.Uss.Models.EntityCollection();
if (path.Identifiers.Count == 1)
parent = _Model.GetEntity(path.Identifiers[0].Value);
else
{
string refName = path.Identifiers[path.Identifiers.Count - 1].Value;
string firstType = path.Identifiers[0].Value;
string lastType = firstType;
string nextRefName = string.Empty;
for (int i = 0; i < path.Identifiers.Count - 1; i++)
{
nextRefName = path.Identifiers[i + 1].Value;
// The next identifier isn't a reference but an attribute
if (_Model.GetReference(lastType, nextRefName) == null &&
_Model.GetAttribute(lastType, nextRefName) != null)
continue;
lastType = _Model.GetReference(lastType, nextRefName, true).ChildType;
}
parent = _Model.GetEntity(lastType);
}
if (parent == null)
throw new Evaluant.Uss.Models.ModelElementNotFoundException(String.Format("The type [{0}] was not found. Check your metadata.", baseType));
if (attributes.Length == 0)
{
// attributes.Length == 0 => get all attributes
_UserAttributes.AddRange(_Model.GetFullAttributesNames(parent.Type));
}
else
{
// attributes.Length > 0 => get the user defined attributes
foreach (string attName in attributes)
{
_UserAttributes.Add(_Model.GetFullAttributeName(attName, parent.Type));
}
}
}
UnionStatement sqlQuery = new UnionStatement();
// Process each entity of the tree and put the corresponding sql query
// into a UnionStatement
StringCollection processedTables = new StringCollection();
_BaseType = path.Identifiers[0].Value;
Hashtable expressions = new Hashtable();
string commonIdField = string.Empty;
foreach (Evaluant.Uss.Models.Entity entity in tree)
{
// If the entity doesn't have a mapping => don't process it
if (_Mapping.Entities[entity.Type] == null)
continue;
path.Identifiers[0].Value = entity.Type;
EntityMapping entityMapping = _Mapping.Entities[entity.Type];
if (processedTables.Contains(entityMapping.Table))
continue;
processedTables.Add(entityMapping.Table);
_ExprLevel.Push(PATH);
SelectStatement exp = (SelectStatement)TransformToSql(path, _UserAttributes, true, lastIsAttribute);
_ExprLevel.Pop();
// process alias name calculation only once
_IsAliasColumnComputed = true;
expressions.Add(entity.Type, exp);
string parentType = string.Empty;
if (_Model.GetParent(_Model.GetEntity(entity.Type)) != null)
parentType = _Model.GetParent(_Model.GetEntity(entity.Type)).Type;
if (parentType == string.Empty || entityMapping.Ids[0].Generator.Name != GeneratorMapping.GeneratorType.inherited || parentType != _BaseType)
continue;
EntityMapping parentMapping = _Mapping.Entities[parentType];
SelectStatement sel = (SelectStatement)expressions[parentType];
SelectStatement exludeClause = new SelectStatement(null);
exludeClause.SelectedAllColumns = true;
exludeClause.FromClause.Add(new TableSource(entityMapping, entityMapping.Table));
string parentIdField = parentMapping.GetIdField(parentMapping.Ids[0]);
if (path.Identifiers.Count > 1)
parentIdField = "ParentId";
exludeClause.WhereClause.SearchCondition.Add(new BinaryLogicExpression(
new Column(parentMapping.Ids[0], sel.TableAlias, parentIdField),
BinaryLogicOperator.Equals,
new Column(entityMapping.Ids[0], entityMapping.Table, entityMapping.GetIdField(entityMapping.Ids[0]))));
ExistsPredicate ex = new ExistsPredicate(exludeClause);
UnaryLogicExpression ua = new UnaryLogicExpression(UnaryLogicOperator.Not, ex);
sel.WhereClause.SearchCondition.Add(ua);
//sqlQuery.SelectExpressions.Add(exp);
}
//If there are many tables in the union statement, make the id fields aliases identical
bool isFirstSelect = true;
ArrayList idAliases = new ArrayList();
foreach (ISQLExpression exp in expressions.Values)
{
SelectStatement innerSelect = (SelectStatement)exp;
if (isFirstSelect)
{
foreach (ISQLExpression innerExp in innerSelect.SelectList)
{
if (innerExp is Column && ((Column)innerExp).Alias.StartsWith(EntityMapping.PREFIX_ID))
idAliases.Add(((Column)innerExp).Alias);
}
isFirstSelect = false;
}
else
{
int i = 0;
foreach (ISQLExpression innerExp in innerSelect.SelectList)
{
if (innerExp is Column && ((Column)innerExp).Alias.StartsWith(EntityMapping.PREFIX_ID))
{
if (idAliases.Count > i)
((Column)innerExp).Alias = (string)idAliases[i];
else
throw new UniversalStorageException(string.Format("entity Id fields do not meet the one of its parent '{0}'", _BaseType));
i++;
}
}
}
//Add the SelectStatement to the unionStatement
sqlQuery.SelectExpressions.Add(innerSelect);
}
if (entityMappingContext.Count == 0)
{
throw new MappingNotFoundException(String.Format("Type not found [{0}]", baseType));
}
EntityMapping em = (EntityMapping)entityMappingContext.Peek();
if (orderby != null)
{
for (int i = 0; i < orderby.Length; i++)
{
string order = orderby[i].Trim();
if (order != string.Empty)
{
bool isDesc = false;
OrderByClauseColumn col = null;
int indexOfDirection = 0;
if ((indexOfDirection = order.ToLower().IndexOf(" desc")) > 0)
{
order = order.Substring(0, indexOfDirection).Trim();
isDesc = true;
}
else if ((indexOfDirection = order.ToLower().IndexOf(" asc")) > 0)
order = order.Substring(0, indexOfDirection).Trim();
if (order == "Id")
{
col = new OrderByClauseColumn(em.GetIdField(em.Ids[0]), true);
}
else
{
AttributeMapping orderMapping = em.Attributes[order, true];
string orderColName = orderMapping.Name;
string fullAttributeName = _Model.GetFullAttributeName(orderMapping.Name, orderMapping.ParentEntity.Type);
if (_AliasColumnMapping.Contains(fullAttributeName))
orderColName = _AliasColumnMapping[fullAttributeName].ToString();
col = new OrderByClauseColumn(orderColName, isDesc);
}
sqlQuery.OrderByClause.Add(col);
}
}
}
if (sqlQuery.OrderByClause.Count == 0 && !lastIsAttribute && orderby != null)
{
// Id position = 1 if loading single Entity (Person or Person[Name = 'p1']
// Id position = 2 if loading referenced Entity (Person.Partners or Person[Name = 'p1'].Partners)
int idPosition = (path.Identifiers.Count == 1) ? 1 : 2;
if (idPosition == 2)
idPosition = _Mapping.Entities[path.Identifiers[0].Value].Ids.Count + 1;
Column columnId = (Column)sqlQuery.SelectExpressions[0].SelectList[idPosition];
// get the Id alias of the first SelectStatement in case of UnionStatement
if (sqlQuery.SelectExpressions[0] is UnionStatement)
{
columnId = (Column)((UnionStatement)sqlQuery.SelectExpressions[0]).SelectExpressions[0].SelectList[idPosition];
}
EntityMapping entityMap = null;
if (columnId.TagMapping is PrimaryKeyMapping)
entityMap = ((PrimaryKeyMapping)columnId.TagMapping).ParentEntity;
if (columnId.TagMapping is RuleMapping)
{
if (idPosition == 2)
entityMap = _Mapping.Entities[((RuleMapping)columnId.TagMapping).ParentReference.EntityChild];
else
entityMap = ((RuleMapping)columnId.TagMapping).ParentReference.EntityParent;
}
if (entityMap != null)
{
SelectStatement selectQuery = sqlQuery;
if (sqlQuery is UnionStatement && ((UnionStatement)sqlQuery).SelectExpressions.Count > 0)
selectQuery = ((UnionStatement)sqlQuery).SelectExpressions[0] as SelectStatement;
foreach (PrimaryKeyMapping pkm in entityMap.Ids)
{
OrderByClauseColumn orderCol = null;
foreach (ISQLExpression exp in selectQuery.SelectList)
{
if (exp is Column && exp.TagMapping == pkm)
{
Column col = exp as Column;
orderCol = new OrderByClauseColumn(col.Alias);
break;
}
}
if (orderCol == null)
{
AttributeMapping attribute = entityMap.Attributes.FindByField(pkm.Field);
string idFieldAlias = pkm.ParentEntity.GetIdFieldAs(pkm);
foreach (string alias in _AliasColumnMapping.Keys)
{
if (alias.Contains(".") && attribute != null)
{
if (alias.Split('.')[1] == attribute.Name)
{
orderCol = new OrderByClauseColumn(_AliasColumnMapping[alias].ToString());
break;
}
}
else if (alias == idFieldAlias)
{
orderCol = new OrderByClauseColumn(_AliasColumnMapping[alias].ToString());
break;
}
}
if (orderCol == null)
orderCol = new OrderByClauseColumn(em.GetIdFieldAs(pkm));
}
if (orderCol != null)
sqlQuery.OrderByClause.Add(orderCol);
}
}
}
return sqlQuery;
}
/// <summary>
/// Removes the first occurrence of a specific Column from this ColumnCollection.
/// </summary>
/// <param name="value">
/// The Column value to remove from this ColumnCollection.
/// </param>
public virtual void Remove(OrderByClauseColumn value)
{
this.List.Remove(value);
}
/// <summary>
/// Initializes a new instance of the ColumnCollection class, containing elements
/// copied from an array.
/// </summary>
/// <param name="items">
/// The array whose elements are to be added to the new ColumnCollection.
/// </param>
public OrderByClauseColumnCollection(OrderByClauseColumn[] items)
{
this.AddRange(items);
}
/// <summary>
/// Inserts an element into the ColumnCollection at the specified index
/// </summary>
/// <param name="index">
/// The index at which the Column is to be inserted.
/// </param>
/// <param name="value">
/// The Column to insert.
/// </param>
public virtual void Insert(int index, OrderByClauseColumn value)
{
this.List.Insert(index, value);
}
/// <summary>
/// Return the zero-based index of the first occurrence of a specific value
/// in this ColumnCollection
/// </summary>
/// <param name="value">
/// The Column value to locate in the ColumnCollection.
/// </param>
/// <returns>
/// The zero-based index of the first occurrence of the _ELEMENT value if found;
/// -1 otherwise.
/// </returns>
public virtual int IndexOf(OrderByClauseColumn value)
{
return this.List.IndexOf(value);
}
/// <summary>
/// Determines whether a specfic Column value is in this ColumnCollection.
/// </summary>
/// <param name="value">
/// The Column value to locate in this ColumnCollection.
/// </param>
/// <returns>
/// true if value is found in this ColumnCollection;
/// false otherwise.
/// </returns>
public virtual bool Contains(OrderByClauseColumn value)
{
return this.List.Contains(value);
}
/// <summary>
/// Adds an instance of type Column to the end of this ColumnCollection.
/// </summary>
/// <param name="value">
/// The Column to be added to the end of this ColumnCollection.
/// </param>
public virtual void Add(OrderByClauseColumn value)
{
this.List.Add(value);
}
public virtual void Visit(OrderByClauseColumn column)
{
if (!string.IsNullOrEmpty(column.TableName))
{
//if (!string.IsNullOrEmpty(schema))
// _Query.Append(FormatAttribute(schema + DOT + column.TableName)).Append(DOT);
//else
_Query.Append(FormatAttribute(column.TableName)).Append(DOT);
}
_Query.Append(FormatAttribute(column.ColumnName)).Append(SPACE);
if (column.ColumnName != string.Empty && column.Desc)
_Query.Append(DESC);
}