Package com.yahoo.vespa.objects

Class Selectable

java.lang.Object

com.yahoo.vespa.objects.Selectable

Direct Known Subclasses:

Identifiable

public class Selectable
extends java.lang.Object

Author:

baldersheim This class acts as an interface for traversing a tree, or a graph. Every non leaf Object implements selectMembers(ObjectPredicate, ObjectOperation) implementing the actual traversal. You can then implement an ObjectPredicate to select which nodes you want to look at with your ObjectOperation

Constructor Summary

Constructors

Constructor	Description
Selectable()

Method Summary

Modifier and Type	Method	Description
void	select(ObjectPredicate predicate, ObjectOperation operation)	Apply the predicate to this object.
static void	select(Selectable selectable, ObjectPredicate predicate, ObjectOperation operation)
void	selectMembers(ObjectPredicate predicate, ObjectOperation operation)	Invoke select(ObjectPredicate, ObjectOperation) on any member objects this object wants to expose through the selection mechanism.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Selectable

public Selectable()

Method Detail

select

public final void select(ObjectPredicate predicate,
                         ObjectOperation operation)

Apply the predicate to this object. If the predicate returns true, pass this object to the operation, otherwise invoke the selectMembers(ObjectPredicate, ObjectOperation) method to locate sub-elements that might trigger the predicate.

Parameters:

predicate - component used to select (sub-)objects

operation - component performing some operation on the selected (sub-)objects

selectMembers

public void selectMembers(ObjectPredicate predicate,
                          ObjectOperation operation)

Invoke select(ObjectPredicate, ObjectOperation) on any member objects this object wants to expose through the selection mechanism. Overriding this method is optional, and which objects to expose is determined by the application logic of the object itself.

Parameters:

predicate - component used to select (sub-)objects

operation - component performing some operation on the selected (sub-)objects

select

public static void select(Selectable selectable,
                          ObjectPredicate predicate,
                          ObjectOperation operation)