Module jdk.dynalink

Package jdk.dynalink.linker.support

Class CompositeTypeBasedGuardingDynamicLinker

java.lang.Object

jdk.dynalink.linker.support.CompositeTypeBasedGuardingDynamicLinker

All Implemented Interfaces:

GuardingDynamicLinker, TypeBasedGuardingDynamicLinker

public class CompositeTypeBasedGuardingDynamicLinker
extends Object
implements TypeBasedGuardingDynamicLinker

A composite type-based guarding dynamic linker. When a receiver of a not yet seen class is encountered, all linkers are queried sequentially on their TypeBasedGuardingDynamicLinker.canLinkType(Class) method. The linkers returning true are then bound to the class, and next time a receiver of same type is encountered, the linking is delegated to those linkers only, speeding up dispatch.

Constructor Summary

Constructors

Constructor	Description
CompositeTypeBasedGuardingDynamicLinker(Iterable<? extends TypeBasedGuardingDynamicLinker> linkers)	Creates a new composite type-based linker.

Method Summary

Modifier and Type	Method	Description
boolean	canLinkType(Class<?> type)	Returns true if at least one of the composite linkers returns true from TypeBasedGuardingDynamicLinker.canLinkType(Class) for the type.
static List<GuardingDynamicLinker>	optimize(Iterable<? extends GuardingDynamicLinker> linkers)	Optimizes a list of type-based linkers.

Methods declared in interface jdk.dynalink.linker.GuardingDynamicLinker

getGuardedInvocation

Methods declared in class java.lang.Object

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

Constructor Detail

CompositeTypeBasedGuardingDynamicLinker

public CompositeTypeBasedGuardingDynamicLinker(Iterable<? extends TypeBasedGuardingDynamicLinker> linkers)

Creates a new composite type-based linker.

Parameters:

linkers - the component linkers

Throws:

NullPointerException - if linkers or any of its elements are null.

Method Detail

canLinkType

public boolean canLinkType(Class<?> type)

Returns true if at least one of the composite linkers returns true from TypeBasedGuardingDynamicLinker.canLinkType(Class) for the type.

Specified by:

canLinkType in interface TypeBasedGuardingDynamicLinker

Parameters:

type - the type to link

Returns:

true true if at least one of the composite linkers returns true from TypeBasedGuardingDynamicLinker.canLinkType(Class), false otherwise.

optimize

public static List<GuardingDynamicLinker> optimize(Iterable<? extends GuardingDynamicLinker> linkers)

Optimizes a list of type-based linkers. If a group of adjacent linkers in the list all implement TypeBasedGuardingDynamicLinker, they will be replaced with a single instance of CompositeTypeBasedGuardingDynamicLinker that contains them.

Parameters:

linkers - the list of linkers to optimize

Returns:

the optimized list

Throws:

NullPointerException - if linkers or any of its elements are null.