GuardingDynamicLinker
, TypeBasedGuardingDynamicLinker
public class CompositeTypeBasedGuardingDynamicLinker extends Object implements TypeBasedGuardingDynamicLinker
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 | Description |
---|---|
CompositeTypeBasedGuardingDynamicLinker |
Creates a new composite type-based linker. |
Modifier and Type | Method | Description |
---|---|---|
boolean |
canLinkType |
Returns true if at least one of the composite linkers returns true from TypeBasedGuardingDynamicLinker.canLinkType(Class) for the type. |
GuardedInvocation |
getGuardedInvocation |
Creates a guarded invocation appropriate for a particular invocation with the specified arguments at a call site. |
static List |
optimize |
Optimizes a list of type-based linkers. |
public CompositeTypeBasedGuardingDynamicLinker(Iterable<? extends TypeBasedGuardingDynamicLinker> linkers)
linkers
- the component linkersNullPointerException
- if linkers
or any of its elements are null.public boolean canLinkType(Class<?> type)
TypeBasedGuardingDynamicLinker.canLinkType(Class)
for the type.canLinkType
in interface TypeBasedGuardingDynamicLinker
type
- the type to linkTypeBasedGuardingDynamicLinker.canLinkType(Class)
, false otherwise.public GuardedInvocation getGuardedInvocation(LinkRequest linkRequest, LinkerServices linkerServices) throws Exception
GuardingDynamicLinker
getGuardedInvocation
in interface GuardingDynamicLinker
linkRequest
- the object describing the request for linking a particular invocationlinkerServices
- linker servicesThrowable
subclass that describes an expected exception condition that also triggers relinking (often it is faster to rely on an infrequent but expected ClassCastException
than on an always evaluated instanceof
guard). While the linker must produce an invocation with parameter types matching those in the call site descriptor of the link request, it should not try to match the return type expected at the call site except when it can do it with only the conversions that lose neither precision nor magnitude, see LinkerServices.asTypeLosslessReturn(MethodHandle, MethodType)
for further explanation.Exception
- if the operation fails for whatever reasonpublic static List<GuardingDynamicLinker> optimize(Iterable<? extends GuardingDynamicLinker> linkers)
TypeBasedGuardingDynamicLinker
, they will be replaced with a single instance of CompositeTypeBasedGuardingDynamicLinker
that contains them.linkers
- the list of linkers to optimizeNullPointerException
- if linkers
or any of its elements are null.
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https://docs.oracle.com/en/java/javase/21/docs/api/jdk.dynalink/jdk/dynalink/linker/support/CompositeTypeBasedGuardingDynamicLinker.html