/// <summary>Visits a type binary expression.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Expression visited</returns>
protected override System.Linq.Expressions.Expression VisitTypeBinary(System.Linq.Expressions.TypeBinaryExpression expression)
{
var classMappings = MappingsRepository.FindMappedClasses(expression.TypeOperand);
if (classMappings.Any())
{
Remotion.Linq.Clauses.FromClauseBase sourceExpression = GetSourceExpression(expression.Expression);
StrongEntityAccessor entityAccessor = _query.FindAllComponents <StrongEntityAccessor>().FirstOrDefault(item => item.SourceExpression == sourceExpression);
if (entityAccessor == null)
{
entityAccessor = this.GetEntityAccessor(sourceExpression);
_query.Elements.Add(entityAccessor);
}
EntityTypeConstrain typeConstrain = this.CreateTypeConstrain(expression.TypeOperand, entityAccessor.SourceExpression.FromExpression);
_lastComponent = typeConstrain;
if ((_currentComponent.Count > 0) && (_currentComponent.Peek() is BinaryOperatorNavigator))
{
HandleComponent(typeConstrain);
}
else if (!entityAccessor.Elements.Contains(typeConstrain))
{
entityAccessor.Elements.Add(typeConstrain);
}
}
else
{
return(base.VisitTypeBinary(expression));
}
return(expression);
}
private void VisitAnyResultOperator(AnyResultOperator anyResultOperator, Remotion.Linq.QueryModel queryModel, int index)
{
string targetIdentifierString = _visitor.Query.CreateIdentifier(_visitor.ItemNameOverride);
IList <EntityConstrain> entityConstrains = null;
StrongEntityAccessor entityAccessor = (from accessor in _visitor.Query.GetQueryComponentNavigator().FindAllComponents <StrongEntityAccessor>()
let constrains = accessor.Elements.OfType <EntityConstrain>()
from constrain in constrains
let predicate = constrain.Predicate as Literal
where predicate != null
let predicateUri = (Uri)predicate.Value
let identifier = constrain.Value as Identifier
where identifier != null
let identifierString = _visitor.Query.RetrieveIdentifier(identifier.Name)
where (identifierString == targetIdentifierString) || ((_fromExpression != null) && (constrain.TargetExpression.EqualsTo(_fromExpression)))
where (entityConstrains = constrains.Where(item =>
(item.Predicate is Literal) && (((Uri)((Literal)item.Predicate).Value).AbsoluteUri == predicateUri.AbsoluteUri)).ToList()).Count > 0
select accessor).FirstOrDefault();
if (entityAccessor != null)
{
foreach (EntityConstrain entityConstrain in entityConstrains)
{
int indexOf = entityAccessor.Elements.IndexOf(entityConstrain);
entityAccessor.Elements.RemoveAt(indexOf);
OptionalPattern optional = new OptionalPattern();
optional.Patterns.Add(entityConstrain);
entityAccessor.Elements.Insert(indexOf, optional);
}
}
Call call = new Call(MethodNames.Bound);
_result = call;
}
private System.Linq.Expressions.Expression VisitPredicateMethodCallUnsafe(System.Linq.Expressions.MethodCallExpression expression, Uri predicate, StrongEntityAccessor entityAccessor)
{
_query.AddEntityAccessor(entityAccessor);
Identifier memberIdentifier = new Identifier(_query.CreateVariableName(predicate.GetFragmentOrLastSegment()));
EntityConstrain constrain = new EntityConstrain();
constrain.Predicate = new Literal(predicate);
constrain.Value = memberIdentifier;
if (!entityAccessor.Elements.Contains(constrain))
{
entityAccessor.Elements.Add(constrain);
}
if (constrain.ShouldBeOptional(_currentComponent))
{
entityAccessor.Elements.Remove(constrain);
OptionalPattern optional = new OptionalPattern();
optional.Patterns.Add(constrain);
entityAccessor.Elements.Add(optional);
}
HandleComponent(memberIdentifier);
_lastComponent = memberIdentifier;
return(expression);
}
/// <summary>Visits an unary expression.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Expression visited</returns>
protected override System.Linq.Expressions.Expression VisitUnary(System.Linq.Expressions.UnaryExpression expression)
{
MethodNames operatorName;
System.Linq.Expressions.ExpressionType expressionType = expression.NodeType;
switch (expression.NodeType)
{
case System.Linq.Expressions.ExpressionType.Convert:
case System.Linq.Expressions.ExpressionType.TypeAs:
return(Visit(expression.Operand));
default:
string methodName = Enum.GetNames(typeof(MethodNames)).Where(item => item == expressionType.ToString()).FirstOrDefault();
if (!System.String.IsNullOrEmpty(methodName))
{
operatorName = (MethodNames)Enum.Parse(typeof(MethodNames), methodName);
}
else
{
return(base.VisitUnary(expression));
}
break;
}
UnaryOperator unaryOperator = new UnaryOperator(operatorName);
HandleComponent(unaryOperator);
Visit(expression.Operand);
CleanupComponent(_lastComponent);
_lastComponent = unaryOperator;
return(expression);
}
private void VisitContainsResultOperator(ContainsResultOperator containsResultOperator, Remotion.Linq.QueryModel queryModel, int index)
{
if (_query.IsSubQuery)
{
_visitor.Visit(containsResultOperator.Item);
QueryComponent item = _visitor.RetrieveComponent();
if (item is IExpression)
{
Filter filter = new Filter(new BinaryOperator(MethodNames.Equal, _mainFromComponent.About, (IExpression)item));
if (!_mainFromComponent.Elements.Contains(filter))
{
_mainFromComponent.Elements.Add(filter);
}
}
EntityConstrain constrain = new EntityConstrain(
new Identifier(_mainFromComponent.About.Name + "_p"),
new Identifier(_mainFromComponent.About.Name + "_o"),
containsResultOperator.Item);
if (!_mainFromComponent.Elements.Contains(constrain))
{
_mainFromComponent.Elements.Add(constrain);
}
Call call = new Call(MethodNames.Any);
call.Arguments.Add(_query);
_result = call;
}
else
{
throw new NotSupportedException(System.String.Format("Cannot perform 'Contains' operation on top level query."));
}
}
public override AbstractExprTreePattern GetPattern(QueryComponent queryComponent)
{
switch (queryComponent)
{
case QueryComponent.Top: //top
{
return new PatternTopSkipOrderBy();
}
case QueryComponent.Skip: //skip
{
return new PatternTopSkipOrderBy();
}
case QueryComponent.OrderBy: //OrderBy
{
return new PatternTopSkipOrderBy();
}
case QueryComponent.SelectSingleEntity: //select single entity
{
return new PatternSelectSingleEntity();
}
case QueryComponent.SimpleProjection: //Simple projection
{
return new PatternSimpleProjection();
}
default:
{
throw new NotImplementedException();
}
}
}
public override AbstractExprTreePattern GetPattern(QueryComponent queryComponent)
{
switch (queryComponent)
{
case QueryComponent.Top: //top
{
return(new PatternTopSkipOrderBy());
}
case QueryComponent.Skip: //skip
{
return(new PatternTopSkipOrderBy());
}
case QueryComponent.OrderBy: //OrderBy
{
return(new PatternTopSkipOrderBy());
}
case QueryComponent.SelectSingleEntity: //select single entity
{
return(new PatternSelectSingleEntity());
}
case QueryComponent.SimpleProjection: //Simple projection
{
return(new PatternSimpleProjection());
}
default:
{
throw new NotImplementedException();
}
}
}
private void OverrideSelector(QueryComponent component, System.Linq.Expressions.Expression selector)
{
if ((component is Identifier) && (selector is System.Linq.Expressions.MemberExpression))
{
System.Linq.Expressions.MemberExpression memberExpression = (System.Linq.Expressions.MemberExpression)selector;
if (!(memberExpression.Member is PropertyInfo))
{
throw new NotSupportedException(System.String.Format("Selection on members of type '{0}' are not supported.", memberExpression.Member.MemberType));
}
PropertyInfo propertyInfo = (PropertyInfo)memberExpression.Member;
if (typeof(IEntity).IsAssignableFrom(propertyInfo.DeclaringType))
{
_propertyMapping = _entityContext.Mappings.FindPropertyMapping((PropertyInfo)memberExpression.Member);
if (typeof(IEntity).IsAssignableFrom(_propertyMapping.ReturnType))
{
OverrideEntitySelector((Identifier)component);
}
else
{
OverrideLiteralSelector(this.GetEntityAccessor((FromClauseBase)FindQuerySource(memberExpression).ReferencedQuerySource));
}
}
}
else if (component is StrongEntityAccessor)
{
_propertyMapping = IdentifierPropertyMapping.Default;
OverrideIdentifierSelector((StrongEntityAccessor)component);
}
}
internal NonEntityQueryModelVisitor(EntityQueryVisitor queryVisitor, IExpression mainFromComponent = null)
{
_visitor = queryVisitor;
_from = null;
_mainFromComponent = mainFromComponent;
_bodies = new List <QueryComponent>();
}
/// <summary>Visits a select clause.</summary>
/// <param name="selectClause">Select clause to be visited.</param>
/// <param name="queryModel">Query model containing given select clause.</param>
public override void VisitSelectClause(SelectClause selectClause, Remotion.Linq.QueryModel queryModel)
{
queryModel.MainFromClause.Accept(this, queryModel);
QuerySourceReferenceExpression querySource = FindQuerySource(selectClause.Selector);
_visitor.Visit(selectClause.Selector);
QueryComponent component = _visitor.RetrieveComponent();
_query = _visitor.Query;
_mainFromComponent = _query.FindAllComponents <StrongEntityAccessor>().Where(item => item.SourceExpression == querySource.ReferencedQuerySource).First();
if (_query.Subject == null)
{
_query.Subject = _mainFromComponent.About;
UnboundConstrain genericConstrain = new UnboundConstrain(new Identifier("s"), new Identifier("p"), new Identifier("o"), _mainFromComponent.SourceExpression.FromExpression);
_mainFromComponent.Elements.Insert(0, genericConstrain);
_mainFromComponent.UnboundGraphName = null;
_query.Select.Add(genericConstrain);
}
_subject = _query.Subject;
_query.Select.Add(_mainFromComponent);
VisitBodyClauses(queryModel.BodyClauses, queryModel);
VisitResultOperators(queryModel.ResultOperators, queryModel);
OverrideSelector(component, selectClause.Selector);
}
/// <summary>Visits a sub-query expression.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Expression visited</returns>
protected override System.Linq.Expressions.Expression VisitSubQuery(SubQueryExpression expression)
{
Remotion.Linq.Clauses.FromClauseBase sourceExpression = (Remotion.Linq.Clauses.FromClauseBase)((QuerySourceReferenceExpression)expression.QueryModel.SelectClause.Selector).ReferencedQuerySource;
StrongEntityAccessor entityAccessor = (sourceExpression.FromExpression is System.Linq.Expressions.ConstantExpression ? null : this.GetEntityAccessor(sourceExpression));
if (entityAccessor != null)
{
Query query = _query.CreateSubQuery(entityAccessor.About);
query.AddEntityAccessor(entityAccessor);
EntityQueryModelVisitor queryModelVisitor = new EntityQueryModelVisitor(query, _entityContext);
queryModelVisitor.VisitQueryModel(expression.QueryModel);
_lastComponent = queryModelVisitor.Result;
HandleComponent(_lastComponent);
}
else
{
NonEntityQueryModelVisitor queryModelVisitor = new NonEntityQueryModelVisitor(this, ConstantFromClause);
Stack <IQueryComponentNavigator> currentComponent = _currentComponent;
_currentComponent = new Stack <IQueryComponentNavigator>();
queryModelVisitor.VisitQueryModel(expression.QueryModel);
_currentComponent = currentComponent;
_lastComponent = queryModelVisitor.Result;
HandleComponent(_lastComponent);
}
return(expression);
}
/// <summary>
/// Saves a component which does not have an associated artefact.
/// </summary>
/// <param name="conceptRef">
/// the concept which identifies the component
/// </param>
/// <param name="value">
/// the value
/// </param>
public void SaveComponent(string conceptRef, string value)
{
IDimension dimension = Utils.GetComponentByName(this._keyFamily, conceptRef);
IConceptObject concept = this.GetCachedConcept(dimension);
this.RemoveComponent(dimension);
var qc = new QueryComponent(dimension, concept, value);
this.UpdateComponentIndex(dimension, qc);
}
private void SafeVisitExpression(System.Linq.Expressions.Expression expression)
{
Stack <IQueryComponentNavigator> currentStack = _currentComponent;
QueryComponent lastComponent = _lastComponent;
_currentComponent = new Stack <IQueryComponentNavigator>();
Visit(expression);
_currentComponent = currentStack;
_lastComponent = lastComponent;
}
/// <summary>
/// Saves a component which has an associated artefact (all of them should have).
/// </summary>
/// <param name="dimension">
/// the dimemnsion
/// </param>
/// <param name="codes">
/// the codes
/// </param>
public void SaveComponent(IDimension dimension, List <ICode> codes)
{
IConceptObject concept = this.GetCachedConcept(dimension);
this.RemoveComponent(dimension);
var qc = new QueryComponent(dimension, concept, codes);
this._codeTreeMap[dimension].CheckCodes(codes);
this.UpdateComponentIndex(dimension, qc);
}
private string AppendCustomLines(string toReturn, QueryComponent stage)
{
var lines = SqlQueryBuilderHelper.GetCustomLinesSQLForStage(this, stage).ToArray();
if (lines.Any())
{
toReturn += Environment.NewLine;
toReturn += string.Join(Environment.NewLine, lines.Select(l => l.Text));
}
return(toReturn);
}
/// <summary>Visits a where clause.</summary>
/// <param name="whereClause">Where clause to be visited.</param>
/// <param name="queryModel">Query model containing given from clause.</param>
/// <param name="index">Index of the where clause in the query model.</param>
public override void VisitWhereClause(WhereClause whereClause, Remotion.Linq.QueryModel queryModel, int index)
{
_visitor.Visit(whereClause.Predicate);
QueryComponent queryComponent = _visitor.RetrieveComponent();
if (queryComponent != null)
{
_bodies.Add(queryComponent);
}
base.VisitWhereClause(whereClause, queryModel, index);
}
/// <summary>Visits an Uri property expression called on <see cref="EntityId" />.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Expression visited</returns>
protected virtual System.Linq.Expressions.Expression VisitEntityIdUri(System.Linq.Expressions.MemberExpression expression)
{
bool isInSelectScenario = (_currentComponent.Count == 0);
StrongEntityAccessor entityAccessor = (isInSelectScenario ? this.GetEntityAccessor(GetMemberTarget(expression)) : this.GetEntityAccessor(GetSourceExpression(expression)));
_query.AddEntityAccessor(entityAccessor);
if (isInSelectScenario)
{
_lastComponent = entityAccessor;
}
else
{
foreach (var entityConstrain in entityAccessor.Elements.OfType <EntityConstrain>())
{
if (entityConstrain.Value is Identifier)
{
Identifier identifier = (Identifier)entityConstrain.Value;
string constrainIdentifier = _query.RetrieveIdentifier(identifier.Name);
string propertyIdentifier = null;
Type propertyType = null;
if (expression.Expression is System.Linq.Expressions.MemberExpression)
{
PropertyInfo propertyInfo = (PropertyInfo)((System.Linq.Expressions.MemberExpression)expression.Expression).Member;
propertyIdentifier = _query.CreateIdentifier(propertyInfo.Name);
propertyType = propertyInfo.PropertyType;
}
else if (expression.Expression is Remotion.Linq.Clauses.Expressions.QuerySourceReferenceExpression)
{
Remotion.Linq.Clauses.Expressions.QuerySourceReferenceExpression querySource = (Remotion.Linq.Clauses.Expressions.QuerySourceReferenceExpression)expression.Expression;
propertyIdentifier = querySource.ReferencedQuerySource.ItemName;
propertyType = querySource.ReferencedQuerySource.ItemType;
}
if ((constrainIdentifier == propertyIdentifier) && (identifier.NativeType == propertyType))
{
_lastComponent = identifier;
break;
}
}
}
if (_lastComponent == null)
{
_lastComponent = entityAccessor.About;
}
HandleComponent(_lastComponent);
}
return(expression);
}
private void VisitAnyResultOperator(AnyResultOperator anyResultOperator, Remotion.Linq.QueryModel queryModel, int index)
{
if (_query.IsSubQuery)
{
Call call = new Call(MethodNames.Any);
call.Arguments.Add(_query);
_result = call;
}
else
{
_query.QueryForm = QueryForms.Ask;
}
}
/// <summary>Visits a where clause.</summary>
/// <param name="whereClause">Where clause to be visited.</param>
/// <param name="queryModel">Query model containing given from clause.</param>
/// <param name="index">Index of the where clause in the query model.</param>
public override void VisitWhereClause(WhereClause whereClause, Remotion.Linq.QueryModel queryModel, int index)
{
_visitor.ConstantFromClause = _auxFromComponent;
_visitor.Visit(whereClause.Predicate);
QueryComponent queryComponent = _visitor.RetrieveComponent();
IQueryComponentNavigator queryComponentNavigator = queryComponent.GetQueryComponentNavigator();
if (queryComponentNavigator != null)
{
queryComponentNavigator.ReplaceComponent(Identifier.Current, _subject);
}
if (queryComponent is QueryElement)
{
if ((!(queryComponent is EntityConstrain)) && (!_query.Elements.Contains((QueryElement)queryComponent)))
{
_query.Elements.Add((QueryElement)queryComponent);
}
}
else if (!_query.FindAllComponents <Filter>().Any(item => item.Expression == queryComponent))
{
Filter filter = new Filter((IExpression)queryComponent);
StrongEntityAccessor targetEntityAccessor = null;
if ((_subject != _mainFromComponent.About) && (queryComponentNavigator.Contains(_subject)))
{
targetEntityAccessor = (from entityAccessor in _query.FindAllComponents <StrongEntityAccessor>()
from constrain in entityAccessor.FindAllComponents <EntityConstrain>()
where (constrain.GetType() == typeof(EntityConstrain)) && (_subject.Equals(constrain.Value))
select entityAccessor).FirstOrDefault();
}
if (targetEntityAccessor == null)
{
IEnumerable <StrongEntityAccessor> targetEntityAccessorExression = _query.Elements.OfType <StrongEntityAccessor>();
if ((_query.IsSubQuery) || (whereClause.Predicate is Remotion.Linq.Clauses.Expressions.SubQueryExpression))
{
targetEntityAccessorExression = targetEntityAccessorExression.Except(new StrongEntityAccessor[] { _query.Elements.OfType <StrongEntityAccessor>().LastOrDefault() });
}
targetEntityAccessor = targetEntityAccessorExression.LastOrDefault() ?? _mainFromComponent;
}
if ((!targetEntityAccessor.Elements.Contains(queryComponent)) && (!targetEntityAccessor.Elements.Contains(filter)))
{
targetEntityAccessor.Elements.Add(filter);
}
}
_auxFromComponent = null;
base.VisitWhereClause(whereClause, queryModel, index);
}
/// <summary>Visits an <see cref="EntityExtensions.Is(RomanticWeb.Entities.IEntity,System.Uri)" /> method call.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Returns visited expression.</returns>
protected virtual System.Linq.Expressions.Expression VisitIsMethodCall(System.Linq.Expressions.MethodCallExpression expression)
{
object objectValue = ((System.Linq.Expressions.ConstantExpression)expression.Arguments[1]).Value;
if (objectValue != null)
{
if (objectValue is Uri)
{
objectValue = new EntityId[] { new EntityId((Uri)objectValue) };
}
else if (objectValue is EntityId)
{
objectValue = new EntityId[] { (EntityId)objectValue };
}
else if ((objectValue is IEnumerable) && (objectValue.GetType().FindItemType() == typeof(Uri)))
{
objectValue = ((IEnumerable)objectValue).Cast <Uri>().Select(item => new EntityId(item));
}
if ((objectValue is IEnumerable) && (objectValue.GetType().FindItemType() == typeof(EntityId)))
{
var types = (IEnumerable <EntityId>)objectValue;
int count = types.Count();
if (count > 0)
{
StrongEntityAccessor entityAccessor = this.GetEntityAccessor(this.GetSourceExpression(expression.Arguments[0]));
if (entityAccessor != null)
{
EntityTypeConstrain constrain = new EntityTypeConstrain(
types.Select(item => item.Uri).First(),
entityAccessor.SourceExpression.FromExpression,
(count > 1 ? types.Skip(1).Select(item => item.Uri).ToArray() : new Uri[0]));
entityAccessor.Elements.Add(constrain);
HandleComponent(constrain);
_lastComponent = constrain;
}
}
return(expression);
}
else
{
return(base.VisitMethodCall(expression));
}
}
else
{
return(base.VisitMethodCall(expression));
}
}
/// <summary>Visits order by clauses.</summary>
/// <param name="orderings">Order by clauses to be visited.</param>
/// <param name="queryModel">Query model containing given body clause.</param>
/// <param name="orderByClause">First order by clause.</param>
protected override void VisitOrderings(ObservableCollection <Ordering> orderings, QueryModel queryModel, OrderByClause orderByClause)
{
foreach (Ordering ordering in orderings)
{
_visitor.Visit(ordering.Expression);
QueryComponent component = _visitor.RetrieveComponent();
if (component is IExpression)
{
IExpression expression = (IExpression)component;
if (!_query.OrderBy.ContainsKey(expression))
{
_query.OrderBy[expression] = (ordering.OrderingDirection == OrderingDirection.Desc);
}
}
}
}
/// <summary>
/// Setter for the time dimension
/// </summary>
/// <param name="startYear">
/// The start year
/// </param>
/// <param name="endYear">
/// The end year
/// </param>
/// <param name="startDate">
/// The start date
/// </param>
/// <param name="endDate">
/// The end date
/// </param>
public void SetTimeComponent(string startDate, string endDate)
{
IDimension dimension = this.KeyFamily.TimeDimension;
IConceptObject concept = this.GetCachedConcept(dimension);
if (dimension == null)
{
throw new NsiClientException(Resources.ExceptionNoTimeDimension);
}
this.RemoveComponent(dimension);
if (!string.IsNullOrEmpty(startDate))
{
var qc = new QueryComponent(dimension, concept, startDate, endDate);
this.UpdateComponentIndex(dimension, qc);
}
}
private void CleanupComponent(QueryComponent component)
{
IQueryComponentNavigator queryComponentNavigator = _lastComponent.GetQueryComponentNavigator();
if (queryComponentNavigator != null)
{
while ((_currentComponent.Count > 0) && (!_currentComponent.Peek().Equals(queryComponentNavigator)))
{
_currentComponent.Pop();
}
if (_currentComponent.Count > 0)
{
_currentComponent.Pop();
}
}
}
private DbService(SqlConnection connection, ILogger logger = null, bool useNLog = false)
{
Lock = new object();
Connection = connection;
Logger = logger ?? (useNLog ? new NLogWrapper(LogManager.GetCurrentClassLogger()) : null);
// TODO: modifiy CurrentClass Logger -> append Type-Parameter
Logger?.Info($"Creating DbService for entity {typeof(T).FullName}");
ModelBuilder = new ModelBuilder(typeof(T), logger, useNLog);
EntityModel = ModelBuilder.EntityModel;
QueryComponent = new QueryComponent <T>(this, EntityModel);
DataManipulationComponent = new DataManipulationComponent <T>(this, EntityModel);
ScriptGenerator = ModelBuilder.ScriptGenerator;
EntityParser = new EntityParser <T>(EntityModel);
}
/// <summary>Visits a binary expression.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Expression visited</returns>
protected override System.Linq.Expressions.Expression VisitBinary(System.Linq.Expressions.BinaryExpression expression)
{
MethodNames operatorName;
System.Linq.Expressions.ExpressionType expressionType = expression.NodeType;
switch (expression.NodeType)
{
case System.Linq.Expressions.ExpressionType.OrElse:
expressionType = System.Linq.Expressions.ExpressionType.Or;
goto default;
case System.Linq.Expressions.ExpressionType.AndAlso:
expressionType = System.Linq.Expressions.ExpressionType.And;
goto default;
default:
string methodName = Enum.GetNames(typeof(MethodNames)).Where(item => item == expressionType.ToString()).FirstOrDefault();
if (!System.String.IsNullOrEmpty(methodName))
{
operatorName = (MethodNames)Enum.Parse(typeof(MethodNames), methodName);
}
else
{
return(base.VisitBinary(expression));
}
break;
}
BinaryOperator binaryOperator = new BinaryOperator(operatorName);
HandleComponent(binaryOperator);
Visit(expression.Left);
CleanupComponent(_lastComponent);
Visit(expression.Right);
CleanupComponent(_lastComponent);
_lastComponent = binaryOperator;
return(expression);
}
private void VisitContainsResultOperator(ContainsResultOperator containsResultOperator, Remotion.Linq.QueryModel queryModel, int index)
{
Call call = new Call(MethodNames.In);
System.Linq.Expressions.Expression expression = _visitor.TransformUnaryExpression(containsResultOperator.Item);
Identifier targetIdentifier = Identifier.Current;
if (expression is System.Linq.Expressions.MemberExpression)
{
System.Linq.Expressions.MemberExpression memberExpression = (System.Linq.Expressions.MemberExpression)expression;
_visitor.Visit(expression);
QueryComponent component = _visitor.RetrieveComponent();
if (component is Identifier)
{
targetIdentifier = (Identifier)component;
}
}
call.Arguments.Add(targetIdentifier);
_result = call;
}
/// <summary>Visits a constant expression.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Expression visited</returns>
protected override System.Linq.Expressions.Expression VisitConstant(System.Linq.Expressions.ConstantExpression expression)
{
if ((expression.Value is IEnumerable) && (!(expression.Value is string)))
{
List list = new List();
IEnumerable value = (IEnumerable)expression.Value;
foreach (object item in value)
{
if (item is IEntity)
{
list.Values.Add(new Literal(((IEntity)item).Id.Uri));
}
else if (item is EntityId)
{
list.Values.Add(new Literal(((EntityId)item).Uri));
}
else
{
list.Values.Add(new Literal(ResolveRelativeUriIfNecessery(item)));
}
}
_lastComponent = list;
}
else if (expression.Value is IEntity)
{
HandleComponent(_lastComponent = new Literal(((IEntity)expression.Value).Id.Uri));
}
else if (expression.Value != null)
{
HandleComponent(_lastComponent = new Literal(ResolveRelativeUriIfNecessery(expression.Value)));
}
else
{
Type valueType = FindLiteralType();
HandleComponent(_lastComponent = new Literal(valueType));
}
return(expression);
}
/// <summary>Visits a query source expression.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Expression visited.</returns>
protected override System.Linq.Expressions.Expression VisitQuerySourceReference(QuerySourceReferenceExpression expression)
{
Remotion.Linq.Clauses.FromClauseBase sourceExpression = GetSourceExpression(expression);
StrongEntityAccessor entityAccessor = this.GetEntityAccessor(sourceExpression);
if (entityAccessor != null)
{
_query.AddEntityAccessor(entityAccessor);
_lastComponent = _query;
}
else
{
_lastComponent = (from entityConstrain in _query.FindAllComponents <EntityConstrain>()
where entityConstrain.GetType() == typeof(EntityConstrain)
let identifier = entityConstrain.Value as Identifier
let targetExpression = ((IQueryVisitor)this).TransformFromExpression(sourceExpression).FromExpression
where (identifier != null) && (targetExpression != null) && (entityConstrain.TargetExpression.EqualsTo(targetExpression))
select identifier).FirstOrDefault();
HandleComponent(_lastComponent);
}
return(expression);
}
/// <summary>Visits an entity identifier member.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Expression visited</returns>
protected virtual System.Linq.Expressions.Expression VisitEntityId(EntityIdentifierExpression expression)
{
if (_currentComponent.Count > 0)
{
StrongEntityAccessor entityAccessor = this.GetEntityAccessor(expression.Target);
HandleComponent(_lastComponent = entityAccessor.About);
if (_currentComponent.Peek() is BinaryOperatorNavigator)
{
BinaryOperator binaryOperator = ((BinaryOperatorNavigator)_currentComponent.Peek()).NavigatedComponent;
Filter filter = new Filter(binaryOperator);
_query.AddEntityAccessor(entityAccessor);
entityAccessor.Elements.Add(filter);
_currentComponent.Push(filter.GetQueryComponentNavigator());
_lastComponent = filter;
}
}
else
{
_lastComponent = this.GetEntityAccessor(expression.Target).About;
}
return(expression);
}
/// <summary>Visits an entity member.</summary>
/// <param name="expression">Expression to be visited.</param>
/// <returns>Expression visited</returns>
protected virtual System.Linq.Expressions.Expression VisitEntityProperty(EntityPropertyExpression expression)
{
StrongEntityAccessor entityAccessor = this.GetEntityAccessor(expression.Target);
_query.AddEntityAccessor(entityAccessor);
Identifier memberIdentifier = null;
EntityConstrain constrain = _query.FindAllComponents <EntityConstrain>()
.FirstOrDefault(item => (item.GetType() == typeof(EntityConstrain) && (item.TargetExpression.EqualsTo(expression.Expression))));
if (constrain == null)
{
memberIdentifier = (_query.FindAllComponents <StrongEntityAccessor>()
.Where(item => item.SourceExpression.FromExpression.EqualsTo(expression.Expression))
.Select(item => item.About).FirstOrDefault()) ?? (new Identifier(_query.CreateVariableName(expression.Name), expression.EntityProperty.PropertyType));
constrain = new EntityConstrain(new Literal(expression.PropertyMapping.Uri), memberIdentifier, expression.Expression);
if (!entityAccessor.Elements.Contains(constrain))
{
entityAccessor.Elements.Add(constrain);
}
}
else
{
if (constrain.ShouldBeOptional(_currentComponent))
{
entityAccessor.Elements.Remove(constrain);
OptionalPattern optional = new OptionalPattern();
optional.Patterns.Add(constrain);
entityAccessor.Elements.Add(optional);
}
memberIdentifier = (Identifier)constrain.Value;
}
HandleComponent(memberIdentifier);
_lastComponent = memberIdentifier;
return(expression);
}
private void HandleComponent(QueryComponent component)
{
if (_currentComponent.Count > 0)
{
if (_currentComponent.Peek().CanAddComponent(component))
{
if (!_currentComponent.Peek().ContainsComponent(component))
{
_currentComponent.Peek().AddComponent(component);
}
}
else
{
_currentComponent.Pop();
}
}
IQueryComponentNavigator queryComponentNavigator = component.GetQueryComponentNavigator();
if (queryComponentNavigator != null)
{
_currentComponent.Push(queryComponentNavigator);
}
}
public abstract AbstractExprTreePattern GetPattern(QueryComponent queryComponent);