Modifier and Type	Class and Description
private static class	CompositeTypeBasedGuardingDynamicLinker.ClassToLinker

Modifier and Type	Field and Description
private final ClassValue<List<TypeBasedGuardingDynamicLinker>>	classToLinker

Access	Constructor and Description
public	CompositeTypeBasedGuardingDynamicLinker(final Iterable<? extends TypeBasedGuardingDynamicLinker> the component linkers linkers) Creates a new composite type-based linker.

Method Summary

Modifier and Type	Method and Description
private static void	addTypeBased(final List<GuardingDynamicLinker> llinkers, final List<TypeBasedGuardingDynamicLinker> tblinkers)
public boolean	Returns: true true if at least one of the composite linkers returns true from `TypeBasedGuardingDynamicLinker#canLinkType(Class)`, false otherwise. canLinkType(final Class<?> the type to link type) Implements jdk.dynalink.linker.TypeBasedGuardingDynamicLinker.canLinkType. Returns true if at least one of the composite linkers returns true from `TypeBasedGuardingDynamicLinker#canLinkType(Class)` for the type.
public GuardedInvocation	getGuardedInvocation(final LinkRequest the object describing the request for linking a particular invocation linkRequest, final LinkerServices linker services linkerServices) Implements jdk.dynalink.linker.GuardingDynamicLinker.getGuardedInvocation. Creates a guarded invocation appropriate for a particular invocation with the specified arguments at a call site.
public static List<GuardingDynamicLinker>	Returns: the optimized list optimize(final Iterable<? extends GuardingDynamicLinker> the list of linkers to optimize linkers) Optimizes a list of type-based linkers.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

classToLinker	back to summary
private final ClassValue<List<TypeBasedGuardingDynamicLinker>> classToLinker

Constructor Detail

CompositeTypeBasedGuardingDynamicLinker back to summary

CompositeTypeBasedGuardingDynamicLinker	back to summary
public CompositeTypeBasedGuardingDynamicLinker(final Iterable<? extends TypeBasedGuardingDynamicLinker> linkers) Creates a new composite type-based linker. Parameters linkers:Iterable<? extends TypeBasedGuardingDynamicLinker> the component linkers Exceptions NullPointerException: if `linkers` or any of its elements are null.

public CompositeTypeBasedGuardingDynamicLinker(final Iterable<? extends TypeBasedGuardingDynamicLinker> linkers)

Creates a new composite type-based linker.

Parameters

linkers:Iterable<? extends TypeBasedGuardingDynamicLinker>: the component linkers

Exceptions

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

Method Detail

addTypeBased	back to summary
private static void addTypeBased(final List<GuardingDynamicLinker> llinkers, final List<TypeBasedGuardingDynamicLinker> tblinkers)

canLinkType back to summary

canLinkType	back to summary
public boolean canLinkType(final Class<?> type) Implements jdk.dynalink.linker.TypeBasedGuardingDynamicLinker.canLinkType. Returns true if at least one of the composite linkers returns true from `TypeBasedGuardingDynamicLinker#canLinkType(Class)` for the type. Parameters type:Class<?> the type to link Returns:boolean true true if at least one of the composite linkers returns true from `TypeBasedGuardingDynamicLinker#canLinkType(Class)`, false otherwise. Annotations @Override

public boolean canLinkType(final Class<?> type)

Implements jdk.dynalink.linker.TypeBasedGuardingDynamicLinker.canLinkType.

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

Parameters

type:Class<?>: the type to link

Returns:boolean

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

Annotations

@Override

getGuardedInvocation back to summary

getGuardedInvocation	back to summary
public GuardedInvocation getGuardedInvocation(final LinkRequest linkRequest, final LinkerServices linkerServices) throws Exception Implements jdk.dynalink.linker.GuardingDynamicLinker.getGuardedInvocation. Doc from jdk.dynalink.linker.GuardingDynamicLinker.getGuardedInvocation. Creates a guarded invocation appropriate for a particular invocation with the specified arguments at a call site. Parameters linkRequest:LinkRequest the object describing the request for linking a particular invocation linkerServices:LinkerServices linker services Returns:GuardedInvocation a guarded invocation with a method handle suitable for the arguments, as well as a guard condition that if fails should trigger relinking. Must return null if it can't resolve the invocation. If the returned invocation is unconditional (which is actually quite rare), the guard in the return value can be null. The invocation can also have any number of switch points for asynchronous invalidation of the linkage, as well as a `Throwable` 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. Annotations @Override Exceptions Exception: if the operation fails for whatever reason

public GuardedInvocation getGuardedInvocation(final LinkRequest linkRequest, final LinkerServices linkerServices) throws Exception

Implements jdk.dynalink.linker.GuardingDynamicLinker.getGuardedInvocation.

Doc from jdk.dynalink.linker.GuardingDynamicLinker.getGuardedInvocation.

Creates a guarded invocation appropriate for a particular invocation with the specified arguments at a call site.

Parameters

linkRequest:LinkRequest: the object describing the request for linking a particular invocation
linkerServices:LinkerServices: linker services

Returns:GuardedInvocation

a guarded invocation with a method handle suitable for the arguments, as well as a guard condition that if fails should trigger relinking. Must return null if it can't resolve the invocation. If the returned invocation is unconditional (which is actually quite rare), the guard in the return value can be null. The invocation can also have any number of switch points for asynchronous invalidation of the linkage, as well as a Throwable 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.

Annotations

@Override

Exceptions

Exception:: if the operation fails for whatever reason

optimize back to summary

optimize	back to summary
public static List<GuardingDynamicLinker> optimize(final 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:Iterable<? extends GuardingDynamicLinker> the list of linkers to optimize Returns:List<GuardingDynamicLinker> the optimized list Exceptions NullPointerException: if `linkers` or any of its elements are null.

public static List<GuardingDynamicLinker> optimize(final 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:Iterable<? extends GuardingDynamicLinker>: the list of linkers to optimize

Returns:List<GuardingDynamicLinker>

the optimized list

Exceptions

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

jdk.dynalink.linker.support back to summary

private Class CompositeTypeBasedGuardingDynamicLinker.ClassToLinker

Class Inheritance

extends ClassValue<List<TypeBasedGuardingDynamicLinker>>

java.lang.Object
java.lang.ClassValue
jdk.dynalink.linker.support.CompositeTypeBasedGuardingDynamicLinker.ClassToLinker

Field Summary

Modifier and Type	Field and Description
private final TypeBasedGuardingDynamicLinker[]	linkers
private static final List<TypeBasedGuardingDynamicLinker>	NO_LINKER
private final List<TypeBasedGuardingDynamicLinker>[]	singletonLinkers

Constructor Summary

Access	Constructor and Description
pack-priv	ClassToLinker(final TypeBasedGuardingDynamicLinker[] linkers)

Method Summary

Modifier and Type	Method and Description
protected List<TypeBasedGuardingDynamicLinker>	computeValue(final Class<?> the type whose class value must be computed clazz) Implements abstract java.lang.ClassValue.computeValue. Computes the given class's derived value for this `ClassValue`.

Inherited from java.lang.ClassValue:: get remove

Field Detail

linkers	back to summary
private final TypeBasedGuardingDynamicLinker[] linkers

NO_LINKER	back to summary
private static final List<TypeBasedGuardingDynamicLinker> NO_LINKER

singletonLinkers	back to summary
private final List<TypeBasedGuardingDynamicLinker>[] singletonLinkers

Constructor Detail

ClassToLinker	back to summary
pack-priv ClassToLinker(final TypeBasedGuardingDynamicLinker[] linkers) Annotations @SuppressWarnings:unchecked, rawtypes

Method Detail

computeValue back to summary

computeValue	back to summary
protected List<TypeBasedGuardingDynamicLinker> computeValue(final Class<?> clazz) Implements abstract java.lang.ClassValue.computeValue. Doc from java.lang.ClassValue.computeValue. Computes the given class's derived value for this `ClassValue`. This method will be invoked within the first thread that accesses the value with the `get` method. Normally, this method is invoked at most once per class, but it may be invoked again if there has been a call to `remove`. If this method throws an exception, the corresponding call to `get` will terminate abnormally with that exception, and no class value will be recorded. Parameters clazz:Class<?> the type whose class value must be computed Returns:List<TypeBasedGuardingDynamicLinker> the newly computed value associated with this `ClassValue`, for the given class or interface Annotations @SuppressWarnings:fallthrough @Override

protected List<TypeBasedGuardingDynamicLinker> computeValue(final Class<?> clazz)

Implements abstract java.lang.ClassValue.computeValue.

Doc from java.lang.ClassValue.computeValue.

Computes the given class's derived value for this ClassValue.

This method will be invoked within the first thread that accesses the value with the get method.

Normally, this method is invoked at most once per class, but it may be invoked again if there has been a call to remove.

If this method throws an exception, the corresponding call to get will terminate abnormally with that exception, and no class value will be recorded.

Parameters

clazz:Class<?>: the type whose class value must be computed

Returns:List<TypeBasedGuardingDynamicLinker>

the newly computed value associated with this ClassValue, for the given class or interface

Annotations

@SuppressWarnings:fallthrough
@Override

public Class CompositeTypeBasedGuardingDynamicLinker

Nested and Inner Type Summary

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Field Detail

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Method Detail

private Class CompositeTypeBasedGuardingDynamicLinker.ClassToLinker

Field Summary

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