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 and Description |
---|
CompositeTypeBasedGuardingDynamicLinker(Iterable<? extends TypeBasedGuardingDynamicLinker> linkers)
Creates a new composite type-based linker.
|
Modifier and Type | Method and Description |
---|---|
boolean |
canLinkType(Class<?> type)
Returns true if at least one of the composite linkers returns true from
TypeBasedGuardingDynamicLinker.canLinkType(Class) for the type. |
GuardedInvocation |
getGuardedInvocation(LinkRequest linkRequest,
LinkerServices linkerServices)
Creates a guarded invocation appropriate for a particular invocation with
the specified arguments at a call site.
|
static List<GuardingDynamicLinker> |
optimize(Iterable<? extends GuardingDynamicLinker> linkers)
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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DRAFT 9-internal+0-2016-04-25-041322.buildd.src