Module java.base

Package java.lang

Interface StringTemplate.Processor.Linkage

All Known Implementing Classes:

FormatProcessorPREVIEW

Enclosing interface:

StringTemplate.ProcessorPREVIEW<R,E extends Throwable>

public static sealed interface StringTemplate.Processor.Linkage
permits FormatProcessorPREVIEW

Linkage is a preview API of the Java platform.

Programs can only use Linkage when preview features are enabled.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

Built-in policies using this additional interface have the flexibility to specialize the composition of the templated string by returning a customized MethodHandle from linkage. These specializations are typically implemented to improve performance; specializing value types or avoiding boxing and vararg arrays.

Implementation Note:

This interface is sealed to only allow standard processors.

Sealed Class Hierarchy Graph:

Since:

21

Method Summary

Modifier and Type	Method	Description
MethodHandle	linkage(List<String> fragments, MethodType type)	This method creates a MethodHandle that when invoked with arguments of those specified in type returns a result that equals that returned by the template processor's process method.

Method Details

linkage

MethodHandle linkage(List<String> fragments,
 MethodType type)

This method creates a MethodHandle that when invoked with arguments of those specified in type returns a result that equals that returned by the template processor's process method. The difference being that this method can preview the template's fragments and value types in advance of usage and thereby has the opportunity to produce a specialized implementation.

Parameters:

fragments - string template fragments

type - method type, includes the StringTemplate receiver as well as the value types

Returns:

MethodHandle for the processor applied to template

Throws:

NullPointerException - if any of the arguments are null