Package ru.vyarus.dropwizard.guice.module.installer.util

Class InstanceUtils

java.lang.Object

ru.vyarus.dropwizard.guice.module.installer.util.InstanceUtils

public final class InstanceUtils
extends Object

Class instance creation utility (to gather all instantiations in one place).

Since:

16.11.2023

Method Summary

Modifier and Type	Method	Description
static <T> T	create(Class<T> type)	Create a new instance using no-args constructor.
static <T> T	create(Class<T> type, Class<?>[] param, Object... args)	Create a new instance using constructor with provided parameters and values.
static <T> T	create(Class<T> type, Class<?> param, Object arg)	Shortcut for create(Class, Class[], Object...) for one constructor argument.
static <T> T	createWithAnyConstructor(Class<T> type)	For tests ONLY!
static <T> T	createWithNulls(Class<T> type, Class<?>... param)	Create new instance using constructor with provided params and nulls as values.

Methods inherited from class java.lang.Object

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

Method Details

create

public static <T> T create(Class<T> type)

Create a new instance using no-args constructor.

Type Parameters:

T - instance type

Parameters:

type - class

Returns:

class instance

create

public static <T> T create(Class<T> type,
 Class<?> param,
 Object arg)

Shortcut for create(Class, Class[], Object...) for one constructor argument.

Type Parameters:

T - instance type

Parameters:

type - class

param - constructor parameter type

arg - parameter value

Returns:

object instance

create

public static <T> T create(Class<T> type,
 Class<?>[] param,
 Object... args)

Create a new instance using constructor with provided parameters and values.

Type Parameters:

T - instance type

Parameters:

type - class

param - constructor parameter types

args - constructor arguments

Returns:

object instance

createWithNulls

public static <T> T createWithNulls(Class<T> type,
 Class<?>... param)

Create new instance using constructor with provided params and nulls as values.

Type Parameters:

T - instance type

Parameters:

type - class

param - constructor params

Returns:

object instance

createWithAnyConstructor

public static <T> T createWithAnyConstructor(Class<T> type)

For tests ONLY!

Tries to find constructor with the smallest amount of arguments and use it with nulls to instantiate object.

WARNING: primitive arguments are not supported!

Type Parameters:

T - target type

Parameters:

type - class

Returns:

class instance