Module jdk.dynalink

Package jdk.dynalink.linker

package jdk.dynalink.linker

Contains interfaces and classes needed by language runtimes to implement their own language-specific object models and type conversions. The main entry point is the GuardingDynamicLinker interface. It needs to be implemented in order to provide linking for the runtime's own object model. A language runtime can have more than one guarding dynamic linker implementation. When a runtime is configuring Dynalink for itself, it will normally set these guarding linkers as the prioritized linkers in its DynamicLinkerFactory (and maybe some of them as fallback linkers, for e.g. handling "method not found" and similar errors in a language-specific manner if no other linker managed to handle the operation.)

A language runtime that wishes to make at least some of its linkers available to other language runtimes for interoperability will need to use a GuardingDynamicLinkerExporter.

Most language runtimes will be able to implement their own linking logic by implementing TypeBasedGuardingDynamicLinker instead of GuardingDynamicLinker; it allows for faster type-based linking dispatch.

Language runtimes that allow type conversions other than those provided by Java will need to have their guarding dynamic linker (or linkers) also implement the GuardingTypeConverterFactory interface to provide the logic for these conversions.

Since:

9

Related Packages

Package	Description
jdk.dynalink	Contains interfaces and classes that are used to link an invokedynamic call site.
jdk.dynalink.linker.support	Contains classes that make it more convenient for language runtimes to implement their own language-specific object models and type conversions by providing basic implementations of some classes as well as various utilities.
jdk.dynalink.beans	Contains the linker for ordinary Java objects.
jdk.dynalink.support	Contains classes that make using Dynalink more convenient by providing basic implementations of some classes as well as various utilities.

Class	Description
ConversionComparator	Optional interface to be implemented by GuardingTypeConverterFactory implementers.
ConversionComparator.Comparison	Enumeration of possible outcomes of comparing one conversion to another.
GuardedInvocation	Represents a conditionally valid method handle.
GuardedInvocationTransformer	Interface for objects that are used to transform one guarded invocation into another one.
GuardingDynamicLinker	The base interface for language-specific dynamic linkers.
GuardingDynamicLinkerExporter	A class acting as a supplier of guarding dynamic linkers that can be automatically loaded by other language runtimes.
GuardingTypeConverterFactory	Optional interface that can be implemented by GuardingDynamicLinker implementations to provide language-specific type conversion capabilities.
LinkerServices	Interface for services provided to GuardingDynamicLinker instances by the DynamicLinker that owns them.
LinkRequest	Represents a request to link a particular invocation at a particular call site.
MethodHandleTransformer	A generic interface describing operations that transform method handles.
MethodTypeConversionStrategy	Interface for objects representing a strategy for converting a method handle to a new type.
TypeBasedGuardingDynamicLinker	A guarding dynamic linker that can determine whether it can link the call site solely based on the type of the first argument at linking invocation time.