An interface for instances that can be used to chain lookup operations.
Remarks
Type Details
- yfiles module
- view-component
- yfiles-umd modules
- All view modules
- Legacy UMD name
- yfiles.graph.IContextLookupChainLink
See Also
Methods
Tries to create or retrieve an implementation of the given type for a given item.
Parameters
A map of options to pass to the method.
Returns
- ↪Object
- an implementation or
null
See Also
Defined in
This method is called by the framework to register the fallback lookup implementation that should be used during a call to contextLookup.
Remarks
Parameters
A map of options to pass to the method.
- next - IContextLookup
- The context to use as a fallback.
Static Methods
Factory method for a lookup chain element that simply adds an entry to a lookup chain.
Parameters
A map of options to pass to the method.
- type - Class
- The type to add to the lookup.
- instance - Object
- The instance to return if the
typeis being looked up.
Returns
- ↪IContextLookupChainLink
- An instance that can be used in a lookup chain.
See Also
Factory method for a lookup chain element that adds an dynamic instance to a lookup chain.
Remarks
instance is of the queried type and will then return the instance.Parameters
A map of options to pass to the method.
- instance - Object
- The instance to query the type from dynamically.
Returns
- ↪IContextLookupChainLink
- An instance that can be used in a lookup chain.
See Also
Factory method for a lookup chain element that adds an ILookup layer to a lookup chain.
Remarks
null, the call will be propagated to the chain.Parameters
A map of options to pass to the method.
- lookup - ILookup
- The lookup to use.
Returns
- ↪IContextLookupChainLink
- An instance that can be used in a lookup chain.
See Also
Creates a lookup chain link that is backed by the given callback.
Remarks
callback returns null the request is passed to the chain.Parameters
A map of options to pass to the method.
- callback - function(Object, Class):Object
- The callback to invoke.
Signature Details
function(subject: any, type: Class) : ObjectCallback delegate that can be used to query results of a virtual lookup call on objects that don't necessarily implementILookup.Parameters
- subject - any
- the subject for which a lookup shall be made
- type - Class
- the type to look up
Returns
- Object
- an instance that can be assigned to type or
null
Returns
- ↪IContextLookupChainLink
- The implementation of the link that uses the
callback.
See Also
factoryLookupChainLink
<TContext,TResult>(contextType: Class, resultType: Class, factory: function(TContext):TResult) : IContextLookupChainLinkFactory method for a lookup chain element that uses a function of type function(TContext) to yield a TResult for a specific TContext.
Remarks
TResult and the context is of type TContext, the factory method will be queried and the result will be returned. Otherwise the next chain link will be delegated the request to.Type Parameters
- TContext
- TResult
Parameters
A map of options to pass to the method.
- contextType - Class
- resultType - Class
- factory - function(TContext):TResult
- The factory delegate to use that yields the result for a given context.
Signature Details
function(item: TContext) : TResultA function which provides a custom into a custom implementation ofTInterfacefor the givenitem.Parameters
- item - TContext
- The item to return the implementation for.
Returns
- TResult
- The new implementation.
Returns
- ↪IContextLookupChainLink
- An instance that can be used in a lookup chain.
See Also
Factory method for a lookup chain element that removes the entry from the lookup chain for a given type.
Parameters
A map of options to pass to the method.
- type - Class
- The type to hide from the lookup.
Returns
- ↪IContextLookupChainLink
- An instance that can be used in a lookup chain.