程序包 cn.taketoday.util

类 Instantiator<T>

java.lang.Object

cn.taketoday.util.Instantiator<T>

类型参数:

T - the type to instantiate

public class Instantiator<T>
extends Object

Simple factory used to instantiate objects by injecting available parameters.

从以下版本开始:

4.0 2022/2/18 10:53

作者:

Phillip Webb, Harry Yang

嵌套类概要

嵌套类

修饰符和类型	类	说明
static interface	Instantiator.AvailableParameters	Callback used to register available parameters.
static interface	Instantiator.FailureHandler	Strategy for handling a failure that occurs when instantiating a type.
private static class	Instantiator.TypeSupplier	Supplier that provides a class type.

字段概要

字段

修饰符和类型	字段	说明
private final Map<Class<?>,Function<Class<?>,Object>>	availableParameters
private static final Comparator<Constructor<?>>	CONSTRUCTOR_COMPARATOR
private final Instantiator.FailureHandler	failureHandler
private static final Instantiator.FailureHandler	throwingFailureHandler
private final Class<?>	type

构造器概要

构造器

构造器	说明
Instantiator(Class<?> type, Consumer<Instantiator.AvailableParameters> availableParameters)	Create a new Instantiator instance for the given type.
Instantiator(Class<?> type, Consumer<Instantiator.AvailableParameters> availableParameters, Instantiator.FailureHandler failureHandler)	Create a new Instantiator instance for the given type.

方法概要

修饰符和类型	方法	说明
private Object[]	getArgs(Class<?>[] parameterTypes)
private Function<Class<?>,Object>	getAvailableParameter(Class<?> parameterType)
private Map<Class<?>,Function<Class<?>,Object>>	getAvailableParameters(Consumer<Instantiator.AvailableParameters> availableParameters)
private T	instantiate(Instantiator.TypeSupplier typeSupplier)
private T	instantiate(Class<?> type)
List<T>	instantiate(ClassLoader classLoader, Collection<String> names)	Instantiate the given set of class name, injecting constructor arguments as necessary.
List<T>	instantiate(Collection<String> names)	Instantiate the given set of class name, injecting constructor arguments as necessary.
private List<T>	instantiate(Stream<Instantiator.TypeSupplier> typeSuppliers)
List<T>	instantiateTypes(Collection<Class<?>> types)	Instantiate the given set of classes, injecting constructor arguments as necessary.

从类继承的方法 java.lang.Object

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

字段详细资料

CONSTRUCTOR_COMPARATOR

private static final Comparator<Constructor<?>> CONSTRUCTOR_COMPARATOR

throwingFailureHandler

private static final Instantiator.FailureHandler throwingFailureHandler

type

private final Class<?> type

availableParameters

private final Map<Class<?>,Function<Class<?>,Object>> availableParameters

failureHandler

private final Instantiator.FailureHandler failureHandler

构造器详细资料

Instantiator

public Instantiator(Class<?> type,
 Consumer<Instantiator.AvailableParameters> availableParameters)

Create a new Instantiator instance for the given type.

参数:

type - the type to instantiate

availableParameters - consumer used to register available parameters

Instantiator

public Instantiator(Class<?> type,
 Consumer<Instantiator.AvailableParameters> availableParameters,
 Instantiator.FailureHandler failureHandler)

Create a new Instantiator instance for the given type.

参数:

type - the type to instantiate

availableParameters - consumer used to register available parameters

failureHandler - a Instantiator.FailureHandler that will be called in case of failure when instantiating objects

方法详细资料

getAvailableParameters

private Map<Class<?>,Function<Class<?>,Object>> getAvailableParameters(Consumer<Instantiator.AvailableParameters> availableParameters)

instantiate

public List<T> instantiate(Collection<String> names)

Instantiate the given set of class name, injecting constructor arguments as necessary.

参数:

names - the class names to instantiate

返回:

a list of instantiated instances, can be modified

instantiate

public List<T> instantiate(@Nullable
 ClassLoader classLoader,
 Collection<String> names)

Instantiate the given set of class name, injecting constructor arguments as necessary.

参数:

classLoader - the source classloader

names - the class names to instantiate

返回:

a list of instantiated instances, can be modified

instantiateTypes

public List<T> instantiateTypes(Collection<Class<?>> types)

Instantiate the given set of classes, injecting constructor arguments as necessary.

参数:

types - the types to instantiate

返回:

a list of instantiated instances, can be modified

instantiate

private List<T> instantiate(Stream<Instantiator.TypeSupplier> typeSuppliers)

instantiate

@Nullable
private T instantiate(Instantiator.TypeSupplier typeSupplier)

instantiate

private T instantiate(Class<?> type)
               throws Exception

抛出:

Exception

getArgs

@Nullable
private Object[] getArgs(Class<?>[] parameterTypes)

getAvailableParameter

@Nullable
private Function<Class<?>,Object> getAvailableParameter(Class<?> parameterType)