/// <summary>
/// Processes the attributes.
/// </summary>
/// <param name="entityMap">Entity mapping whitch contains the attribute</param>
/// <param name="name">Name of the attribute</param>
/// <param name="loadAttributes"></param>
/// <param name="checkAlias">Indicate if returned column must have an computed alias name or not</param>
/// <returns>Return a <see cref="Column"/></returns>
public ISQLExpression ProcessAttributes(EntityMapping entityMap, string name, bool loadAttributes, bool checkAlias)
{
if (name == "Id")
{
Table currentTable = (Table)tableContext.Peek();
return new Column(entityMap.Ids[0], currentTable.TableAlias, entityMap.GetIdField(entityMap.Ids[0]));
}
else
{
// Exception management : attribute mapping
AttributeMapping attributeMapping = entityMap.Attributes[name];
//Attempt to get the attribute in the children types
if (attributeMapping == null)
foreach (Evaluant.Uss.Models.Entity e in _Model.GetTree(entityMap.Type))
{
EntityMapping em = _Mapping.Entities[e.Type];
if ((attributeMapping = em.Attributes[name]) != null)
break;
}
//Attempt to get the attribute in the parent types
if (attributeMapping == null)
{
Evaluant.Uss.Models.Entity cur = _Model.GetEntity(entityMap.Type);
while (_Model.GetParent(cur) != null)
{
cur = _Model.GetParent(cur);
EntityMapping current = _Mapping.Entities[cur.Type];
if (current.Attributes[name] != null)
attributeMapping = current.Attributes[name];
}
}
if (attributeMapping == null)
throw new UniversalStorageException(String.Format("The attribute '{0}' of the entity '{1}' is not defined in your mapping file", name, entityMap.Type));
// If the attribute is contained in entity's table : the current query doesn't change
if (attributeMapping.Table == entityMap.Table)
{
Table currentTable = (Table)tableContext.Peek();
Column c = new Column(attributeMapping, currentTable.TableAlias, attributeMapping.Field);
//if (entityMap.Ids[attributeMapping.Field] != null)
// c.ColumnName = entityMap.GetIdField(entityMap.Ids[attributeMapping.Field]);
if (checkAlias)
{
string attributeFullName = _Model.GetFullAttributeName(attributeMapping.Name, attributeMapping.ParentEntity.Type);
//if (entityMap.Ids[attributeMapping.Field] != null)
// attributeFullName = entityMap.GetIdFieldAs(entityMap.Ids[attributeMapping.Field]);
//c.ColumnName = (_AliasColumnMapping.Contains(attributeFullName)) ? _AliasColumnMapping[attributeFullName].ToString() : "";
if (_AliasColumnMapping.Contains(attributeFullName))
c.ColumnName = _AliasColumnMapping[attributeFullName].ToString();
}
return c;
}
// Else : create a new select query
else
{
// Get the current context
Table currentTable = (Table)tableContext.Pop();
SelectStatement mainQuery = (SelectStatement)queryContext.Pop();
// Create a new query
SelectStatement currentQuery = new SelectStatement(attributeMapping);
Table attributeTable = new TableSource(attributeMapping, attributeMapping.Table, CreateUniqueAttributeAlias());
string atrbId = attributeMapping.Table == null || attributeMapping.Table == entityMap.Table ? entityMap.GetIdField(entityMap.Ids[0]) : attributeMapping.ParentField;
if (loadAttributes)
{
return this.ProcessAttributesWithLoadAttribute(mainQuery, currentQuery, currentTable, entityMap, attributeTable, attributeMapping, atrbId);
}
else
{
if (_IsFirstAttribute)
{
_IsFirstAttribute = false;
// if current table is a JoinedTable :
// from clause = mainQuery INNER JOIN attributeTable
if (currentTable.GetType() == typeof(JoinedTable))
{
JoinedTable lastJoinTable = new JoinedTable(mainQuery, loadAttributes ? TypeJoinedTable.LeftOuter : TypeJoinedTable.Inner, attributeTable);
lastJoinTable.TableAlias = mainQuery.TableAlias;
BinaryLogicExpression onCondition = new BinaryLogicExpression(
new Column(entityMap.Ids[0], mainQuery.TableAlias, entityMap.GetIdField(entityMap.Ids[0])),
BinaryLogicOperator.Equals,
new Column(attributeMapping, attributeTable.TableAlias, atrbId));
if (mainQuery.WhereClause.SearchCondition.Count != 0)
{
foreach (ILogicExpression expression in mainQuery.WhereClause.SearchCondition)
{
onCondition = new BinaryLogicExpression(onCondition, BinaryLogicOperator.And, expression);
}
}
lastJoinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(entityMap.Ids[0], mainQuery.TableAlias, entityMap.GetIdField(entityMap.Ids[0])),
BinaryLogicOperator.Equals,
new Column(entityMap.Ids[0], attributeTable.TableAlias, atrbId)));
currentQuery.TableAlias = mainQuery.TableAlias;
currentQuery.FromClause.Add(lastJoinTable);
currentQuery.WhereClause.SearchCondition.Add(new BinaryLogicExpression(
new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Discriminator),
BinaryLogicOperator.Equals,
new Constant(name, DbType.AnsiString)));
tableContext.Push(lastJoinTable);
queryContext.Push(currentQuery);
return new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Field);
}
// else
// from clause = currentTable INNER JOIN attributeTable
else
{
JoinedTable joinTable = new JoinedTable(currentTable, loadAttributes ? TypeJoinedTable.LeftOuter : TypeJoinedTable.Inner, attributeTable);
joinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(entityMap.Ids[0], currentTable.TableAlias, entityMap.GetIdField(entityMap.Ids[0])),
BinaryLogicOperator.Equals,
new Column(attributeMapping, attributeTable.TableAlias, atrbId)));
currentQuery.TableAlias = CreateUniqueTableAlias();
currentQuery.FromClause.Add(joinTable);
currentQuery.WhereClause.SearchCondition = mainQuery.WhereClause.SearchCondition;
tableContext.Push(joinTable);
}
}
else
{
Table rightTable = ((JoinedTable)currentTable).RigthTable;
JoinedTable joinTable = new JoinedTable(attributeTable, TypeJoinedTable.Inner, rightTable);
joinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(attributeMapping, rightTable.TableAlias, atrbId),
BinaryLogicOperator.Equals,
new Column(attributeMapping, attributeTable.TableAlias, atrbId)));
((JoinedTable)currentTable).RigthTable = joinTable;
currentQuery.SelectList.Add(new Column(entityMap.Ids[0], currentTable.TableAlias, entityMap.GetIdField(entityMap.Ids[0])));
currentQuery.TableAlias = currentTable.TableAlias;
currentQuery.FromClause.Add(currentTable);
tableContext.Push(currentTable);
}
queryContext.Push(currentQuery);
return new Column(attributeMapping, attributeTable.TableAlias, attributeMapping.Field);
}
}
}
}
/// <summary>
///
/// </summary>
/// <param name="firstIsType"></param>
/// <param name="isInConstraint"></param>
/// <param name="lastIsAttribute"></param>
/// <param name="overrideId">True, if the Path is into a constraint and queried an attribute through Reference
/// (Person[Brother.MyKind.Name = 'nice'])</param>
public void ConvertToSQL(Path path, bool firstIsType, bool isInConstraint, bool lastIsAttribute, bool overrideId)
{
int index = 0;
// Process the first entity
if (firstIsType)
{
Identifier ident = path.Identifiers[index++];
// Exception management : entity mapping
EntityMapping entityMapping = _Mapping.Entities[ident.Value, true];
// Save entity mapping current context
entityMappingContext.Push(entityMapping);
entityModelContext.Push(_Model.GetEntity(ident.Value, true));
ProcessEntity(ident, false);
}
// Restore the first entity context
EntityMapping firstMapping = (EntityMapping)entityMappingContext.Peek();
Table firstTable = (Table)tableContext.Peek();
// Process references
int lastIndex = lastIsAttribute ? path.Identifiers.Count - 1 : path.Identifiers.Count;
bool isFirstReference = true;
ArrayList collEpression = new ArrayList();
int stackCount = entityMappingContext.Count;
Evaluant.Uss.Models.Entity previousEntityModel = (Evaluant.Uss.Models.Entity)entityModelContext.Peek();
for (; index < lastIndex; index++)
{
Identifier ident = path.Identifiers[index];
UnionStatement childrenSubExp = new UnionStatement();
//childrenSubExp.TableAlias = ident.Value;
Evaluant.Uss.Models.Reference reference =
_Model.GetReference(previousEntityModel.Type, ident.Value, true);
// ident.Value isn't a reference but an attribute
if (_Model.GetReference(previousEntityModel.Type, ident.Value) == null &&
_Model.GetAttribute(previousEntityModel.Type, ident.Value) != null)
{
EntityMapping tmpMap = _Mapping.Entities[previousEntityModel.Type];
entityMappingContext.Push(tmpMap);
entityModelContext.Push(_Model.GetEntity(previousEntityModel.Type));
continue;
}
Evaluant.Uss.Models.Entity currentModel = previousEntityModel; //Model.GetEntity(previousEntityModel.Type);
while (_Model.GetParent(currentModel) != null && reference == null)
{
currentModel = Model.GetParent(currentModel);
// ident.Value isn't a reference but an attribute
if (_Model.GetReference(currentModel.Type, ident.Value) == null &&
_Model.GetAttribute(currentModel.Type, ident.Value) != null)
continue;
reference = _Model.GetReference(currentModel.Type, ident.Value);
if (reference != null)
break;
}
// Restore parent context
EntityMapping parentMapping = index == 0 && isInConstraint ? (EntityMapping)entityMappingContext.Peek() : (EntityMapping)entityMappingContext.Pop();
Evaluant.Uss.Models.Entity parentModel =
index == 0 && isInConstraint ? (Evaluant.Uss.Models.Entity)entityModelContext.Peek() : (Evaluant.Uss.Models.Entity)entityModelContext.Pop();
string cType = reference.ChildType;
previousEntityModel = _Model.GetEntity(cType, true);
Table parentTable = (Table)tableContext.Pop();
SelectStatement parentQuery = (SelectStatement)queryContext.Pop();
// Get tree for reference.ChildType
IList childrenSubTypes = _Model.GetTree(cType);
// Get all fullname attributes
StringCollection attributes = new StringCollection();
attributes.AddRange(_Model.GetFullAttributesNames(cType));
Hashtable subQueries = new Hashtable();
foreach (Evaluant.Uss.Models.Entity child in childrenSubTypes)
{
if (_Mapping.Entities[child.Type] == null)
continue;
string refName = ident.Value;
ReferenceMapping referenceMapping = parentMapping.References[refName];
Evaluant.Uss.Models.Entity current = Model.GetEntity(parentMapping.Type);
if (referenceMapping == null)
{
while (_Model.GetParent(current) != null)
{
current = Model.GetParent(current);
referenceMapping = _Mapping.Entities[current.Type].References[refName];
if (referenceMapping != null)
break;
}
}
if (referenceMapping == null)
throw new MappingNotFoundException(String.Format("Reference [{0}] not found in Type [{1}]", ident.Value, parentMapping.Type));
RuleMappingCollection ruleMapping = referenceMapping.Rules;
// Save child mapping context
EntityMapping childMapping = _Mapping.Entities[child.Type];
entityMappingContext.Push(childMapping);
entityModelContext.Push(_Model.GetEntity(child.Type));
// Process child mapping reference
ProcessEntity(ident, true);
// Restore child context
Table childTable = (Table)tableContext.Pop();
SelectStatement childQuery = (SelectStatement)queryContext.Pop();
childQuery.TableAlias = childTable.TableAlias;
childQuery.SelectList = new ExpressionCollection();
// Begin to the first INNER JOIN
Table righFirstTableJoinTable = null;
// la référence précedente a une contrainte avec Attribute Table de type INNER JOIN
if (isFirstReference && parentTable.GetType() == typeof(JoinedTable))
righFirstTableJoinTable = parentQuery;
// la référence précedente suit une autre référence de type INNER JOIN
else if (!isFirstReference && parentTable.GetType() == typeof(JoinedTable))
{
righFirstTableJoinTable = parentTable;
foreach (ILogicExpression exp in parentQuery.WhereClause.SearchCondition)
{
childQuery.WhereClause.SearchCondition.Add(exp);
}
}
// autre cas
else if (parentTable.GetType() == typeof(TableSource))
{
righFirstTableJoinTable = parentTable;
// Ajoute les clauses Wheres de la table courante
if (!isInConstraint)
foreach (ILogicExpression exp in parentQuery.WhereClause.SearchCondition)
{
childQuery.WhereClause.SearchCondition.Add(exp);
}
}
else
{
righFirstTableJoinTable = parentTable;
if (righFirstTableJoinTable.TableAlias == null || righFirstTableJoinTable.TableAlias == string.Empty)
righFirstTableJoinTable.TableAlias = refName;
}
Table leftFirstJoinTable = ruleMapping.Count != 1 ? new TableSource(ruleMapping[0], ruleMapping[0].ChildTable, "rule" + index) : childTable;
string parentFieldTable = righFirstTableJoinTable.TableAlias;
for (int indexId = 0; indexId < referenceMapping.EntityParent.Ids.Count; indexId++)
{
PrimaryKeyMapping pmk = referenceMapping.EntityParent.Ids[indexId];
string idfield = string.Empty;
if (righFirstTableJoinTable.GetType() == typeof(TableSource))
idfield = referenceMapping.EntityParent.GetIdField(pmk);
else
idfield = referenceMapping.EntityParent.GetIdFieldAs(pmk);
string alias = GetParentIdAlias(referenceMapping.EntityParent, pmk.Field);
childQuery.SelectList.Add(new Column(ruleMapping[0], parentFieldTable, idfield, alias));
}
// Multiple Key
foreach (PrimaryKeyMapping pkm in childMapping.Ids)
childQuery.SelectList.Add(new Column(ruleMapping[ruleMapping.Count - 1], childQuery.TableAlias, childMapping.GetIdField(pkm), childMapping.GetIdFieldAs(pkm)));
// adds all foreign keys contained in the current table that will be used by the next reference
if (index + 1 < lastIndex)
{
Identifier nextIdent = path.Identifiers[index + 1];
Models.Entity type = child;
while (_Mapping.Entities[type.Type].References[nextIdent.Value] == null)
type = Model.GetEntity(type.Inherit, true);
if (_Mapping.Entities[type.Type].References[nextIdent.Value] == null)
break;
RuleMappingCollection rules = _Mapping.Entities[type.Type].References[nextIdent.Value].Rules;
if (rules.Count == 1
&& rules[0].ParentField != referenceMapping.EntityParent.IdFields
&& rules[0].ParentField != childMapping.IdFields)
{
foreach (string parentField in rules[0].ParentField.Split(SqlMapperProvider.IDSEP))
childQuery.SelectList.Add(new Column(rules[0], childQuery.TableAlias, parentField, parentField));
}
}
// specify relation role name
if (!string.IsNullOrEmpty(referenceMapping.DiscriminatorField))
{
childQuery.WhereClause.SearchCondition.Add(
new BinaryLogicExpression(
new Column(referenceMapping, leftFirstJoinTable.TableAlias, referenceMapping.DiscriminatorField),
BinaryLogicOperator.Equals,
new Constant(referenceMapping.DiscriminatorValue, DbType.AnsiString)
));
}
// inner join on index table FK_Parent
JoinedTable firstJoinTable = new JoinedTable(leftFirstJoinTable, TypeJoinedTable.Inner, righFirstTableJoinTable);
firstJoinTable.TableAlias = leftFirstJoinTable.TableAlias;
for (int indexId = 0; indexId < ruleMapping[0].ParentFields.Length; indexId++)
{
string childField = ruleMapping[0].ChildFields[indexId];
string parentField = ruleMapping[0].ParentFields[indexId];
string idField = parentMapping.Ids.Count > indexId ? parentMapping.Ids[indexId].Field : string.Empty;
string parentid = ruleMapping[0].GetParentFieldAs();
if (righFirstTableJoinTable.GetType() == typeof(TableSource) || (ruleMapping.Count == 1 && parentField != idField))
parentid = parentField;
firstJoinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(ruleMapping[0], righFirstTableJoinTable.TableAlias, parentid),
BinaryLogicOperator.Equals,
new Column(ruleMapping[0], leftFirstJoinTable.TableAlias, childField)));
}
if (!string.IsNullOrEmpty(childMapping.DiscriminatorField))
{
BinaryLogicExpression discriminator = new BinaryLogicExpression(
new Column(childMapping, childQuery.TableAlias, childMapping.DiscriminatorField),
BinaryLogicOperator.Equals,
new Constant(childMapping.DiscriminatorValue, DbType.AnsiStringFixedLength)
);
childQuery.WhereClause.SearchCondition.Add(discriminator);
}
if (ruleMapping.Count == 1)
childQuery.FromClause.Add(firstJoinTable);
// Fin Construction du premier INNER JOIN
if (isInConstraint && ruleMapping.Count == 1 && index == 0)
{
// Restore the first entity context
Table mainTable = (Table)tableContext.Peek();
if (ruleMapping[0].ParentFields.Length > 1)
{
MultipledKey parentKey = new MultipledKey(ruleMapping[0]);
MultipledKey childKey = new MultipledKey(ruleMapping[0]);
foreach (string key in ruleMapping[0].ParentFields)
{
parentKey.Collection.Add(new Column(ruleMapping[0], firstTable.TableAlias, key)); // parent table/column link
childKey.Collection.Add(new Column(ruleMapping[0], mainTable.TableAlias, key)); // child table/column link
}
linkTableContext.Push(parentKey); // parent table/column link
linkTableContext.Push(childKey); // child table/column link
}
else
{
linkTableContext.Push(new Column(ruleMapping[0], firstTable.TableAlias, ruleMapping[0].ParentField)); // parent table/column link
linkTableContext.Push(new Column(ruleMapping[0], mainTable.TableAlias, ruleMapping[0].ParentField)); // child table/column link
}
}
tableContext.Push(firstJoinTable);
for (int i = 1; i < ruleMapping.Count; i++)
{
firstJoinTable = (JoinedTable)tableContext.Pop();
JoinedTable lastJoinTable = null;
// la référence courante possède une contrainte qui est de type INNER JOIN
if (ident.Constraint != null && childTable.GetType() == typeof(JoinedTable))
{
SelectStatement query = new SelectStatement(referenceMapping);
query.TableAlias = childTable.TableAlias;
lastJoinTable = new JoinedTable(childQuery, TypeJoinedTable.Inner, firstJoinTable);
lastJoinTable.TableAlias = childQuery.TableAlias;
lastJoinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(ruleMapping[i], childQuery.TableAlias, ruleMapping[i].ChildField),
BinaryLogicOperator.Equals,
new Column(ruleMapping[i], leftFirstJoinTable.TableAlias, ruleMapping[i].ParentField)));
query.SelectList.Add(new Column(childMapping.Ids[0], childQuery.TableAlias, childMapping.GetIdField(childMapping.Ids[0])));
childQuery = query;
tableContext.Push(lastJoinTable);
}
else
{
Table leftTable = i == ruleMapping.Count - 1 ? childTable : new TableSource(ruleMapping[i], ruleMapping[i].ChildTable, String.Concat("rule", index + i));
Table rightTable = firstJoinTable;
lastJoinTable = new JoinedTable(leftTable, TypeJoinedTable.Inner, rightTable);
lastJoinTable.TableAlias = leftTable.TableAlias;
// inner join on index table FK_Child
lastJoinTable.SearchConditions.Add(new BinaryLogicExpression(
new Column(ruleMapping[i], leftTable.TableAlias, ruleMapping[i].ChildField),
BinaryLogicOperator.Equals,
new Column(ruleMapping[i], rightTable.TableAlias, ruleMapping[i].ParentField)));
tableContext.Push(lastJoinTable);
}
// it's a last rule
if (i == ruleMapping.Count - 1)
{
lastJoinTable = (JoinedTable)tableContext.Pop();
if (isInConstraint && index == lastIndex - 1)
{
// Restore the first entity context
EntityMapping mainMapping = (EntityMapping)entityMappingContext.Peek();
Table mainTable = (Table)tableContext.Peek();
string parentField = firstMapping.GetIdField(firstMapping.Ids[0]);
if (path.Identifiers.Count > 1 && (!lastIsAttribute || overrideId))
parentField = "ParentId";
linkTableContext.Push(new Column(firstMapping.Ids[0], parentTable.TableAlias, parentField)); // parent table/column link
linkTableContext.Push(new Column(firstMapping.Ids[0], mainTable.TableAlias, firstMapping.GetIdField(firstMapping.Ids[0]))); // child table/column link
}
if (referenceMapping.DiscriminatorField != null && referenceMapping.Name != "*")
{
BinaryLogicExpression condition = new BinaryLogicExpression(
new Column(referenceMapping, leftFirstJoinTable.TableAlias, referenceMapping.DiscriminatorField),
BinaryLogicOperator.Equals,
new Constant(ident.Value, DbType.AnsiString));
collEpression.Add(condition);
}
childQuery.FromClause.Add(lastJoinTable);
tableContext.Push(lastJoinTable);
}
}
childQuery.SelectList.Insert(0, new Constant(child.Type, DbType.AnsiString, TYPE_ALIAS));
int attributeTableIndex = 0;
foreach (string attName in attributes)
{
string attNameAlias = attName.Substring(attName.LastIndexOf(DOT) + 1);
string shortAttName = attNameAlias;
AttributeMapping am = childMapping.Attributes[shortAttName];
// if duplicated attribute name, add an incremented index at the end (if not already done)
if (!_IsAliasColumnComputed)
{
foreach (string colName in _AliasColumnMapping.Values)
{
if (colName == shortAttName)
{
if (!_AliasColumnMapping.Contains(attName))
{
attNameAlias += ++_AliasColumnIndexNumber;
_AliasColumnMapping.Add(attName, attNameAlias);
}
else
attNameAlias = _AliasColumnMapping[attName].ToString();
break;
}
}
}
else
{
// get the previous computed alias
attNameAlias = _AliasColumnMapping[attName].ToString();
}
if (am != null)
{
if (am.Table == childMapping.Table)
{
childQuery.SelectList.Add(new Column(am, childQuery.TableAlias, am.Field, attNameAlias));
}
if (am.Table != childMapping.Table && childMapping.Ids[0].Generator.Name == GeneratorMapping.GeneratorType.inherited)
{
// Add the Left Join for parent attribute table
Table left = childQuery.FromClause[0];
Table right = new TableSource(am.ParentEntity.Ids[0], am.Table, string.Concat("a", attributeTableIndex++));
JoinedTable jt = new JoinedTable(left, TypeJoinedTable.LeftOuter, right);
jt.SearchConditions.Add(new BinaryLogicExpression(
new Column(null, right.TableAlias, am.ParentField),
BinaryLogicOperator.Equals,
new Column(null, left.TableAlias, childMapping.GetIdField(childMapping.Ids[0]))
));
childQuery.FromClause[0] = jt;
childQuery.SelectList.Add(new Column(am, right.TableAlias, am.Field, attNameAlias));
// Get the parent table and insert a clause and then we don't return the
// records which have a record in a child table
string parentType = string.Empty;
if (_Model.GetParent(_Model.GetEntity(child.Type)) != null)
parentType = _Model.GetParent(_Model.GetEntity(child.Type)).Type;
if (parentType == string.Empty)
continue;
EntityMapping parentEntityMapping = _Mapping.Entities[parentType];
SelectStatement sel = (SelectStatement)subQueries[parentType];
SelectStatement exludeClause = new SelectStatement(null);
exludeClause.SelectedAllColumns = true;
exludeClause.FromClause.Add(new TableSource(childMapping, childMapping.Table));
exludeClause.WhereClause.SearchCondition.Add(new BinaryLogicExpression(
new Column(parentEntityMapping.Ids[0], sel.TableAlias, parentEntityMapping.GetIdField(parentEntityMapping.Ids[0])),
BinaryLogicOperator.Equals,
new Column(childMapping.Ids[0], childMapping.Table, childMapping.GetIdField(childMapping.Ids[0]))));
ExistsPredicate ex = new ExistsPredicate(exludeClause);
UnaryLogicExpression ua = new UnaryLogicExpression(UnaryLogicOperator.Not, ex);
sel.WhereClause.SearchCondition.Add(ua);
}
}
else
{
childQuery.SelectList.Add(new Constant(DBNull.Value, DbType.AnsiStringFixedLength, attNameAlias));
}
// Store the correspondance between the alias/column name and the attribute name
if (!_IsAliasColumnComputed && !_AliasColumnMapping.Contains(attName))
_AliasColumnMapping.Add(attName, attNameAlias);
}
// entityMappingContext.Pop();
// entityModelContext.Pop();
tableContext.Pop();
//childrenSubExp.SelectExpressions.Add(childQuery);
subQueries.Add(child.Type, childQuery);
}
foreach (SelectStatement sel in subQueries.Values)
childrenSubExp.SelectExpressions.Add(sel);
childrenSubExp.TableAlias = parentQuery.TableAlias;
if (parentQuery.SelectList.Count == 0)
{
//parentQuery.SelectedAllColumns = true;
}
//isFirstReference = false;
queryContext.Push(childrenSubExp);
//entityMappingContext.Push(_Mapping.Entities.GetEntity(cType));
//entityModelContext.Push(_Model.GetEntity(cType));
//if(!isInConstraint)
tableContext.Push(childrenSubExp);
// queryContext.Push(childQuery);
}
// if only one attribute
if (lastIsAttribute && index == 0)
{
//FROM [Course] as [e2]
//WHERE ([e2].[CourseId] = [e1].[CourseId])
SelectStatement childQuery = (SelectStatement)queryContext.Pop();
firstTable = (Table)tableContext.Pop();
childQuery.FromClause.Add(firstTable);
Table mainTable = (Table)tableContext.Peek();
childQuery.WhereClause.SearchCondition.Add(
new BinaryLogicExpression(new Column(null, firstTable.TableAlias, firstMapping.GetIdField(firstMapping.Ids[0])),
BinaryLogicOperator.Equals,
new Column(null, mainTable.TableAlias, firstMapping.GetIdField(firstMapping.Ids[0]))));
queryContext.Push(childQuery);
tableContext.Push(firstTable);
}
if (isInConstraint)
{
int max = entityMappingContext.Count;
if (lastIsAttribute)
max--;
for (int i = max; i > stackCount; i--)
{
entityMappingContext.Pop();
entityModelContext.Pop();
}
}
}
public override void Visit(Function function)
{
bool firstIsType = ((int)_ExprLevel.Peek() == EXPR);
_ExprLevel.Push(_ExprLevel.Peek());
ISQLExpression expression = null;
EntityMapping entityMap = null;
if (!firstIsType)
entityMap = (EntityMapping)entityMappingContext.Peek();
SelectStatement subQuery = new SelectStatement(entityMap);
int lastIndex = function.Path.Identifiers.Count - 1;
if (!firstIsType)
{
for (int index = 0; index < lastIndex; index++)
{
string refName = function.Path.Identifiers[index].Value;
ReferenceMapping refeMap = entityMap.References[refName];
// If refeMap == null, cannot find the reference in the child
// Then try to get it from parent types
if (refeMap == null)
{
Evaluant.Uss.Models.Entity current = Model.GetEntity(entityMap.Type);
if (refeMap == null)
{
while (Model.GetParent(current) != null)
{
current = Model.GetParent(current);
refeMap = _Mapping.Entities[current.Type].References[refName];
if (refeMap != null)
{
entityMap = refeMap.EntityParent;
break;
}
}
}
}
if (refeMap == null)
throw new SqlMapperException(string.Concat("Cannot find the reference", refName, " from the entity ", entityMap.Type));
//entityMap = _Mapping.Entities[refeMap.EntityChild];
}
}
Table currentTable = null;
switch (function.Type)
{
case FunctionEnum.Average:
if (firstIsType)
{
subQuery = (SelectStatement)TransformToSql(function.Path, new string[0], new string[0], true); ;
subQuery.TableAlias = CreateUniqueTableAlias();
if (subQuery is UnionStatement)
{
SelectStatement select = new SelectStatement(null);
select.FromClause.Add(subQuery as Table);
subQuery = select;
}
tableContext.Push(subQuery as Table);
_IsFirstAttribute = true;
expression = ProcessAttributes((EntityMapping)entityMappingContext.Peek(), function.Path.Identifiers[lastIndex].Value, false, true);
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(null, AggregateFunctionEnum.Avg, expression));
sqlExpressionContext.Push(subQuery);
}
else
{
currentTable = new TableSource(entityMap, ((TableSource)tableContext.Peek()).TableName, CreateUniqueTableAlias());
tableContext.Push(currentTable);
queryContext.Push(subQuery);
ConvertToSQL(function.Path, false, true, true);
expression = ProcessAttributes(entityMap, function.Path.Identifiers[lastIndex].Value, false, true);
subQuery = (SelectStatement)queryContext.Peek();
if (subQuery.GetType() == typeof(UnionStatement))
{
SelectStatement sel = new SelectStatement(null);
subQuery.TableAlias = CreateUniqueTableAlias();
sel.FromClause.Add(subQuery);
sel.SelectList = new ExpressionCollection();
sel.SelectList.Add(new AggregateFunction(entityMap, AggregateFunctionEnum.Avg, expression));
sqlExpressionContext.Push(sel);
}
else
{
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(entityMap, AggregateFunctionEnum.Avg, expression));
sqlExpressionContext.Push(subQuery);
}
// link tables for inline views
((SelectStatement)sqlExpressionContext.Peek()).WhereClause.SearchCondition.Add(new BinaryLogicExpression(new Column(null, subQuery.TableAlias, "ParentId"), BinaryLogicOperator.Equals, linkTableContext.Pop() as Column));
tableContext.Pop();
queryContext.Pop();
}
break;
case FunctionEnum.Count:
if (firstIsType)
{
subQuery = (SelectStatement)TransformToSql(function.Path, new string[0], null, false);
subQuery.TableAlias = CreateUniqueTableAlias();
if (subQuery is UnionStatement)
{
SelectStatement select = new SelectStatement(null);
select.FromClause.Add(subQuery as Table);
subQuery = select;
}
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(null, AggregateFunctionEnum.Count, new Constant("*", DbType.StringFixedLength)));
sqlExpressionContext.Push(subQuery);
}
else
{
currentTable = new TableSource(entityMap, entityMap.Table, CreateUniqueTableAlias());
tableContext.Push(currentTable);
queryContext.Push(subQuery);
ConvertToSQL(function.Path, false, true, false);
currentTable = (Table)tableContext.Peek();
subQuery = (SelectStatement)queryContext.Peek();
if (subQuery.GetType() == typeof(UnionStatement))
{
SelectStatement sel = new SelectStatement(null);
subQuery.TableAlias = CreateUniqueTableAlias();
sel.FromClause.Add(subQuery);
sel.SelectList = new ExpressionCollection();
sel.SelectList.Add(new AggregateFunction(entityMap, AggregateFunctionEnum.Count, new Constant("*", DbType.StringFixedLength)));
sqlExpressionContext.Push(sel);
}
else
{
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(entityMap, AggregateFunctionEnum.Count, new Constant("*", DbType.StringFixedLength)));
sqlExpressionContext.Push(subQuery);
}
// link tables for inline views
((SelectStatement)sqlExpressionContext.Peek()).WhereClause.SearchCondition.Add(new BinaryLogicExpression(new Column(null, subQuery.TableAlias, "ParentId"), BinaryLogicOperator.Equals, linkTableContext.Pop() as Column));
tableContext.Pop();
queryContext.Pop();
}
break;
case FunctionEnum.Exists:
currentTable = new TableSource(entityMap, entityMap.Table, CreateUniqueTableAlias());
tableContext.Push(currentTable);
queryContext.Push(subQuery);
ConvertToSQL(function.Path, false, true, false);
subQuery = (SelectStatement)queryContext.Peek();
// the exists function just need ids fields
// do not list attribute field to avoid problems with data type fields (text, ntext, image for sql server)
// Remove none needed selected item, according to the path
// no references: keep Type, Id (2 fields)
// references: keep Type, IdParent, Id (3 fields)
int keepFieldNb = (function.Path.Identifiers.Count == 1) ? 2 : 3;
if (subQuery is UnionStatement)
{
foreach (SelectStatement select in ((UnionStatement)subQuery).SelectExpressions)
{
for (int i = select.SelectList.Count - 1; i >= keepFieldNb; i--)
select.SelectList.RemoveAt(i);
// link tables for inline views
Column cLeft = linkTableContext.Pop() as Column;
Column cRight = linkTableContext.Pop() as Column;
if (cLeft is MultipledKey)
{
for (int index = 0; index < ((MultipledKey)cLeft).Collection.Count; index++)
{
select.WhereClause.SearchCondition.Add(new BinaryLogicExpression(((MultipledKey)cLeft).Collection[index], BinaryLogicOperator.Equals, ((MultipledKey)cRight).Collection[index]));
}
}
else
{
select.WhereClause.SearchCondition.Add(new BinaryLogicExpression(cLeft, BinaryLogicOperator.Equals, cRight));
}
}
}
else
{
for (int i = subQuery.SelectList.Count - 1; i >= keepFieldNb; i--)
subQuery.SelectList.RemoveAt(i);
// link tables for inline views
subQuery.WhereClause.SearchCondition.Add(new BinaryLogicExpression(linkTableContext.Pop() as Column, BinaryLogicOperator.Equals, linkTableContext.Pop() as Column));
}
subQuery.SelectedAllColumns = true;
expression = new ExistsPredicate(subQuery);
sqlExpressionContext.Push(expression);
tableContext.Pop();
queryContext.Pop();
break;
case FunctionEnum.IsNull:
_IsFirstAttribute = true;
expression = new IsNullPredicate(ProcessAttributes(entityMap, function.Path.Identifiers[lastIndex].Value, false));
sqlExpressionContext.Push(expression);
break;
case FunctionEnum.Max:
if (firstIsType)
{
subQuery = (SelectStatement)TransformToSql(function.Path, new string[0], new string[0], true);
subQuery.TableAlias = CreateUniqueTableAlias();
if (subQuery is UnionStatement)
{
SelectStatement select = new SelectStatement(null);
select.FromClause.Add(subQuery as Table);
subQuery = select;
}
tableContext.Push(subQuery as Table);
_IsFirstAttribute = true;
expression = ProcessAttributes((EntityMapping)entityMappingContext.Peek(), function.Path.Identifiers[lastIndex].Value, false, true);
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(null, AggregateFunctionEnum.Max, expression));
sqlExpressionContext.Push(subQuery);
}
else
{
currentTable = new TableSource(entityMap, ((TableSource)tableContext.Peek()).TableName, CreateUniqueTableAlias());
tableContext.Push(currentTable);
queryContext.Push(subQuery);
entityMappingContext.Push(entityMap);
ConvertToSQL(function.Path, false, true, true);
EntityMapping lastEM = (EntityMapping)entityMappingContext.Peek();
//entityModelContext.Pop();
entityModelContext.Peek();
expression = ProcessAttributes(lastEM, function.Path.Identifiers[lastIndex].Value, false, true);
subQuery = (SelectStatement)queryContext.Peek();
if (subQuery.GetType() == typeof(UnionStatement))
{
SelectStatement sel = new SelectStatement(null);
subQuery.TableAlias = CreateUniqueTableAlias();
sel.FromClause.Add(subQuery);
sel.SelectList = new ExpressionCollection();
sel.SelectList.Add(new AggregateFunction(lastEM, AggregateFunctionEnum.Max, expression));
sqlExpressionContext.Push(sel);
}
else
{
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(lastEM, AggregateFunctionEnum.Max, expression));
sqlExpressionContext.Push(subQuery);
}
// link tables for inline views
if (linkTableContext.Count > 0)
((SelectStatement)sqlExpressionContext.Peek()).WhereClause.SearchCondition.Add(
new BinaryLogicExpression(new Column(null, subQuery.TableAlias, "ParentId"), BinaryLogicOperator.Equals, linkTableContext.Pop() as Column));
tableContext.Pop();
queryContext.Pop();
entityMappingContext.Pop();
}
break;
case FunctionEnum.Min:
if (firstIsType)
{
subQuery = (SelectStatement)TransformToSql(function.Path, new string[0], new string[0], true); ;
subQuery.TableAlias = CreateUniqueTableAlias();
if (subQuery is UnionStatement)
{
SelectStatement select = new SelectStatement(null);
select.FromClause.Add(subQuery as Table);
subQuery = select;
}
tableContext.Push(subQuery as Table);
_IsFirstAttribute = true;
expression = ProcessAttributes((EntityMapping)entityMappingContext.Peek(), function.Path.Identifiers[lastIndex].Value, false, true);
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(null, AggregateFunctionEnum.Min, expression));
sqlExpressionContext.Push(subQuery);
}
else
{
currentTable = new TableSource(entityMap, ((TableSource)tableContext.Peek()).TableName, CreateUniqueTableAlias());
tableContext.Push(currentTable);
queryContext.Push(subQuery);
ConvertToSQL(function.Path, false, true, true);
expression = ProcessAttributes(entityMap, function.Path.Identifiers[lastIndex].Value, false, true);
subQuery = (SelectStatement)queryContext.Peek();
if (subQuery.GetType() == typeof(UnionStatement))
{
SelectStatement sel = new SelectStatement(null);
subQuery.TableAlias = CreateUniqueTableAlias();
sel.FromClause.Add(subQuery);
sel.SelectList = new ExpressionCollection();
sel.SelectList.Add(new AggregateFunction(entityMap, AggregateFunctionEnum.Min, expression));
sqlExpressionContext.Push(sel);
}
else
{
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(entityMap, AggregateFunctionEnum.Min, expression));
sqlExpressionContext.Push(subQuery);
}
// link tables for inline views
((SelectStatement)sqlExpressionContext.Peek()).WhereClause.SearchCondition.Add(new BinaryLogicExpression(new Column(null, subQuery.TableAlias, "ParentId"), BinaryLogicOperator.Equals, linkTableContext.Pop() as Column));
tableContext.Pop();
queryContext.Pop();
}
break;
case FunctionEnum.Sum:
if (firstIsType)
{
subQuery = (SelectStatement)TransformToSql(function.Path, new string[0], new string[0], true);
subQuery.TableAlias = CreateUniqueTableAlias();
if (subQuery is UnionStatement)
{
SelectStatement select = new SelectStatement(null);
select.FromClause.Add(subQuery as Table);
subQuery = select;
}
tableContext.Push(subQuery as Table);
_IsFirstAttribute = true;
expression = ProcessAttributes((EntityMapping)entityMappingContext.Peek(), function.Path.Identifiers[lastIndex].Value, false, true);
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(null, AggregateFunctionEnum.Sum, expression));
sqlExpressionContext.Push(subQuery);
}
else
{
currentTable = new TableSource(entityMap, ((TableSource)tableContext.Peek()).TableName, CreateUniqueTableAlias());
tableContext.Push(currentTable);
queryContext.Push(subQuery);
ConvertToSQL(function.Path, false, true, true);
expression = ProcessAttributes(entityMap, function.Path.Identifiers[lastIndex].Value, false, true);
subQuery = (SelectStatement)queryContext.Peek();
if (subQuery.GetType() == typeof(UnionStatement))
{
SelectStatement sel = new SelectStatement(null);
subQuery.TableAlias = CreateUniqueTableAlias();
sel.FromClause.Add(subQuery);
sel.SelectList = new ExpressionCollection();
sel.SelectList.Add(new AggregateFunction(entityMap, AggregateFunctionEnum.Sum, expression));
sqlExpressionContext.Push(sel);
}
else
{
subQuery.SelectList = new ExpressionCollection();
subQuery.SelectList.Add(new AggregateFunction(entityMap, AggregateFunctionEnum.Sum, expression));
sqlExpressionContext.Push(subQuery);
}
// link tables for inline views
((SelectStatement)sqlExpressionContext.Peek()).WhereClause.SearchCondition.Add(new BinaryLogicExpression(new Column(null, subQuery.TableAlias, "ParentId"), BinaryLogicOperator.Equals, linkTableContext.Pop() as Column));
tableContext.Pop();
queryContext.Pop();
}
break;
}
_ExprLevel.Pop();
}
/// <summary>
/// Process an attribute like following :
/// Person[Brother.Kind.Name = 'nice']
/// </summary>
/// <returns>The column corresponding to the required attribute, i.e. : Name</returns>
public ISQLExpression ProcessReferenceAttribute(Path path, EntityMapping baseEntity, string[] references, string attributeName)
{
bool firstIsType = ((int)_ExprLevel.Peek() == EXPR);
_ExprLevel.Push(_ExprLevel.Peek());
SelectStatement subQuery = new SelectStatement(baseEntity);
int lastIndex = path.Identifiers.Count - 1;
int referenceCounter = 0;
if (!firstIsType)
{
for (int index = 0; index < lastIndex; index++)
{
string refName = path.Identifiers[index].Value;
ReferenceMapping refeMap = baseEntity.References[refName];
// If refeMap == null, cannot find the reference in the child
// Then try to get it from parent types
if (refeMap == null)
{
Evaluant.Uss.Models.Entity current = Model.GetEntity(baseEntity.Type);
if (refeMap == null)
{
while (Model.GetParent(current) != null)
{
current = Model.GetParent(current);
refeMap = _Mapping.Entities[current.Type].References[refName];
if (refeMap != null)
break;
}
}
}
if (refeMap == null)
throw new SqlMapperException(string.Concat("Cannot find the reference", refName, " from the entity ", baseEntity.Type));
referenceCounter += 1;
//entityMap = _Mapping.Entities.GetEntity(refeMap.EntityChild);
}
}
TableSource currentTable = new TableSource(baseEntity, baseEntity.Table, CreateUniqueTableAlias());
tableContext.Push(currentTable);
queryContext.Push(subQuery);
bool overrideId = false;
if (referenceCounter > 1)
overrideId = true;
ConvertToSQL(path, false, true, true, overrideId);
entityMappingContext.Pop();
subQuery = (SelectStatement)queryContext.Peek();
//// the exists function just need ids fields
//// do not list attribute field to avoid problems with data type fields (text, ntext, image for sql server)
//// Remove none needed selected item, according to the path
//// no references: keep Type, Id (2 fields)
//// references: keep Type, IdParent, Id (3 fields)
int keepFieldNb = (path.Identifiers.Count == 1) ? 2 : 3;
if (subQuery is UnionStatement)
{
foreach (SelectStatement select in ((UnionStatement)subQuery).SelectExpressions)
{
for (int i = select.SelectList.Count - 1; i >= keepFieldNb; i--)
select.SelectList.RemoveAt(i);
// link tables for inline views
select.WhereClause.SearchCondition.Add(new BinaryLogicExpression(linkTableContext.Pop() as Column, BinaryLogicOperator.Equals, linkTableContext.Pop() as Column));
}
}
else
{
for (int i = subQuery.SelectList.Count - 1; i >= keepFieldNb; i--)
subQuery.SelectList.RemoveAt(i);
// link tables for inline views
subQuery.WhereClause.SearchCondition.Add(new BinaryLogicExpression(linkTableContext.Pop() as Column, BinaryLogicOperator.Equals, linkTableContext.Pop() as Column));
}
UnionStatement us = subQuery as UnionStatement;
if (us != null)
{
foreach (SelectStatement s in us.SelectExpressions)
{
s.SelectList.Clear();
s.SelectList.Add(new Column(null, s.TableAlias, attributeName));
}
}
else
{
subQuery.SelectList.Clear();
subQuery.SelectList.Add(new Column(null, attributeName, subQuery.TableAlias));
}
//subQuery.SelectedAllColumns = true;
//expression = new ExistsPredicate(subQuery);
//sqlExpressionContext.Push(subQuery);
tableContext.Pop();
queryContext.Pop();
_ExprLevel.Pop();
//return expression;
return subQuery;
}
public void ProcessEntity(Identifier ident, bool isInRef)
{
// Restore current entity mapping context
EntityMapping entityMapping = (EntityMapping)entityMappingContext.Peek();
// Initialization
Table currentTable = new TableSource(entityMapping, entityMapping.Table, CreateUniqueTableAlias());
Column currentItem = new Column(entityMapping.Ids[0], currentTable.TableAlias, entityMapping.GetIdField(entityMapping.Ids[0]), entityMapping.GetIdFieldAs(entityMapping.Ids[0]));
SelectStatement currentQuery = new SelectStatement(entityMapping);
if (!isInRef)
currentQuery.TableAlias = currentTable.TableAlias;
// Save current context
tableContext.Push(currentTable);
sqlExpressionContext.Push(currentItem);
queryContext.Push(currentQuery);
if (entityMapping.DiscriminatorField != null && !isInRef)
{
InPredicate ip = new InPredicate(new Column(entityMapping, currentTable.TableAlias, entityMapping.DiscriminatorField));
string parentType = entityMapping.Type;
if (_BaseType != null && _BaseType != parentType)
{
Evaluant.Uss.Models.Entity parentEntity = Model.GetEntity(_BaseType);
while (Model.GetParent(parentEntity) != null)
parentEntity = Model.GetParent(parentEntity);
parentType = parentEntity.Type;
}
//Evaluant.Uss.Models.Entity parentType = Model.GetEntity(parentType);
//Get all the children of the queried type
IList children = _Model.GetTree(parentType);
ip.SubQueries.Add(new Constant(entityMapping.DiscriminatorValue, DbType.AnsiString));
StringCollection processed = new StringCollection();
foreach (Evaluant.Uss.Models.Entity e in children)
{
if (e.Type == parentType)
continue;
EntityMapping current = _Mapping.Entities[e.Type, true];
string currentType = current.DiscriminatorValue;
if (processed.Contains(currentType))
continue;
processed.Add(currentType);
ip.SubQueries.Add(new Constant(currentType, DbType.AnsiString));
}
currentQuery.WhereClause.SearchCondition.Add(ip);
}
// Process constraint : an attribute constraint can modify the context
if (ident.Constraint != null)
{
int stackSizeBefore = entityMappingContext.Count;
ProcessConstraint(ident.Constraint);
int stackSizeAfter = entityMappingContext.Count;
for (int i = stackSizeAfter - 1; i > stackSizeBefore - 1; i--)
{
entityMappingContext.Pop();
entityModelContext.Pop();
}
}
}
public virtual void Visit(TableSource table)
{
//if (string.IsNullOrEmpty(schema))
_Query.Append(FormatAttribute(table.TableName)).Append(SPACE);
//else
//_Query.Append(FormatAttribute(schema + DBDialect.DOT + table.TableName)).Append(SPACE);
if (table.TableAlias != String.Empty)
_Query.Append(SPACE).Append(FormatTableAlias(table.TableAlias)).Append(SPACE);
}