Package org.axonframework.common

Class ConstructorUtils

java.lang.Object

org.axonframework.common.ConstructorUtils

public final class ConstructorUtils
extends Object

Utility class for constructing objects using reflection.

Utility functions in this class do not create instances directly. Instead, they provide reusable functions that can be used to construct a multitude of instances of the same type. It is advisable to cache this function for reuse.

Since:

5.0.0

Author:

Mitchell Herrijgers

Method Summary

Modifier and Type	Method	Description
static <T, A> Function<A,T>	factoryForTypeWithOptionalArgument(Class<T> type, Class<? extends A> argumentClass)	Returns a function that constructs an instance of the given type using the constructor that accepts an argument of the given class, or alternatively using a zero-argument constructor.
static <T> Supplier<T>	getConstructorFunctionWithZeroArguments(Class<T> type)	Returns a function that constructs an instance of the given type using the zero-argument constructor.

Methods inherited from class java.lang.Object

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

Method Details

getConstructorFunctionWithZeroArguments

public static <T> Supplier<T> getConstructorFunctionWithZeroArguments(@Nonnull
 Class<T> type)

Returns a function that constructs an instance of the given type using the zero-argument constructor. If the type does not have a zero-argument constructor, an IllegalArgumentException is thrown.

Type Parameters:

T - The type of object to construct.

Parameters:

type - The type of object to construct. Must have a zero-argument constructor.

Returns:

A function that constructs an instance of the given type using the zero-argument constructor.

factoryForTypeWithOptionalArgument

public static <T,
A> Function<A,T> factoryForTypeWithOptionalArgument(@Nonnull
 Class<T> type,
 @Nonnull
 Class<? extends A> argumentClass)

Returns a function that constructs an instance of the given type using the constructor that accepts an argument of the given class, or alternatively using a zero-argument constructor. If neither is available, an IllegalArgumentException is thrown.

Type Parameters:

T - The type of object to construct.

A - The type of the argument to pass to the constructor.

Parameters:

type - The type of object to construct. Must have a constructor that accepts an argument of the given class, or a zero-argument constructor.

argumentClass - The class of the argument to pass to the constructor.

Returns:

A function that constructs an instance of the given type using the constructor that accepts an argument of the given class, or alternatively using a zero-argument constructor.