ScopeHandlerBase Class |
Base class for scope handlers. Scope handlers are dispatch endpoints for expression handling inside a scope, e.g. inside an expression handler routine.
As C# doesn't support multiple dynamic dispatch, the expression call the handler themselves which is the foundation of the visitor pattern. As the
.NET expression classes don't have a Handle routine, a big switch/case statement is present to overcome this problem. This class contains no real logic,
it just dispatches the call to Handle to the right routine which is then overriden in a subclass.
Inheritance HierarchyNamespace: SD.LLBLGen.Pro.LinqSupportClasses.ScopeHandlers
Assembly: SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.4.0.0 (5.4.0)
SyntaxThe ScopeHandlerBase type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | ScopeHandlerBase | Initializes a new instance of the ScopeHandlerBase class |
Methods| Name | Description | |
|---|---|---|
| DefaultHandler |
The default handler for a linq expression if there's no handler available.
|
 | Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| Handle(BinaryExpression) |
Handles the specified expression to handle.
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| Handle(ConditionalExpression) |
Handles the specified expression to handle.
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| Handle(ConstantExpression) |
Handles the specified expression to handle.
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| Handle(Expression) |
Handles the specified linq expression. This is done by 2-stage dispatch: it will call (if it's our own expression class) its Handle method which
through polymorphism will call this handler object's Handle routine back with the right type, so it will call the right routine.
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| Handle(InvocationExpression) |
Handles the specified expression to handle.
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| Handle(LambdaExpression) |
Handles the specified expression to handle.
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| Handle(ListInitExpression) |
Handles the specified expression to handle.
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| Handle(MemberExpression) |
Handles the specified expression to handle.
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| Handle(MemberInitExpression) |
Handles the specified expression to handle.
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| Handle(MethodCallExpression) |
Handles the specified expression to handle.
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| Handle(NewArrayExpression) |
Handles the specified expression to handle.
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| Handle(NewExpression) |
Handles the specified expression to handle.
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| Handle(ParameterExpression) |
Handles the specified expression to handle.
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| Handle(TypeBinaryExpression) |
Handles the specified expression to handle.
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| Handle(UnaryExpression) |
Handles the specified expression to handle.
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| Handle(AggregateExpression) |
Handles the specified expression to handle.
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| Handle(AllAnyExpression) |
Handles the specified expression to handle.
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| Handle(ContainsExpression) |
Handles the specified expression to handle.
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| Handle(DbFunctionCallExpression) |
Handles the specified expression to handle.
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| Handle(DefaultIfEmptyExpression) |
Handles the specified expression to handle.
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| Handle(EntityExpression) |
Handles the specified expression to handle.
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| Handle(EntityFieldExpression) |
Handles the specified expression to handle.
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| Handle(ExceptIntersectExpression) |
Handles the specified expression to handle.
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| Handle(ExcludeIncludeFieldsExpression) |
Handles the specified expression to handle.
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| Handle(FilterExpression) |
Handles the specified expression to handle.
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| Handle(GroupByExpression) |
Handles the specified expression to handle.
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| Handle(GroupByKeyReferenceExpression) |
Handles the specified expression to handle.
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| Handle(GroupJoinExpression) |
Handles the specified expression to handle.
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| Handle(InClauseExpression) |
Handles the specified expression to handle.
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| Handle(InMemoryEvalCandidateExpression) |
Handles the specified expression to handle.
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| Handle(JoinExpression) |
Handles the specified expression to handle.
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| Handle(JoinResultExpression) |
Handles the specified expression to handle.
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| Handle(LikeExpression) |
Handles the specified expression to handle.
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| Handle(LinqExpressionAsSetExpression) |
Handles the specified expression to handle.
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| Handle(LLBLGenProExpressionExpression) |
Handles the specified expression to handle.
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| Handle(PathEdgeExpression) |
Handles the specified expression to handle.
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| Handle(PrefetchPathExpression) |
Handles the specified expression to handle.
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| Handle(ProjectionExpression) |
Handles the specified expression to handle.
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| Handle(ProjectionListExpression) |
Handles the specified expression to handle.
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| Handle(QueryExpression) |
Handles the specified expression to handle.
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| Handle(RelationCollectionExpression) |
Handles the specified expression to handle.
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| Handle(SelectExpression) |
Handles the specified expression to handle.
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| Handle(SetExpression) |
Handles the specified expression to handle.
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| Handle(SetReferenceExpression) |
Handles the specified expression to handle.
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| Handle(SortClauseExpression) |
Handles the specified expression to handle.
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| Handle(WhereExpression) |
Handles the specified expression to handle.
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| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
RemarksClass is primarly meant to be used to remove switch/case blocks in the expression handlers.
See Also