Module dev.metaschema.core

Package dev.metaschema.core.metapath.function

Class FunctionService

java.lang.Object

dev.metaschema.core.metapath.function.FunctionService

All Implemented Interfaces:

IFunctionResolver

public final class FunctionService
extends Object
implements IFunctionResolver

Supports looking up named Metapath functions that are loaded using the ServiceLoader interface.

Constructor Summary

Constructors

Constructor	Description
FunctionService()	Construct a new function service.

Method Summary

Modifier and Type	Method	Description
IFunction	getFunction(IEnhancedQName name, int arity)	Retrieve the function with the provided name that supports the signature of the provided methods.
static FunctionService	getInstance()	Get the singleton instance of the function service.
Stream<IFunction>	stream()	Retrieve the collection of function signatures in this library as a stream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FunctionService

public FunctionService()

Construct a new function service.

Method Details

getInstance

@NonNull
public static FunctionService getInstance()

Get the singleton instance of the function service.

Returns:

the service instance

stream

@NonNull
public Stream<IFunction> stream()

Retrieve the collection of function signatures in this library as a stream.

Returns:

a stream of function signatures

getFunction

public IFunction getFunction(@NonNull
 IEnhancedQName name,
 int arity)

Description copied from interface: IFunctionResolver

Retrieve the function with the provided name that supports the signature of the provided methods.

Specified by:

getFunction in interface IFunctionResolver

Parameters:

name - the name of a group of functions

arity - the count of arguments for use in determining an argument signature match

Returns:

the matching function