DeterminableImports (Spring Boot API)

函数接口:
这是一个函数接口, 因此可用作 lambda 表达式或方法引用的赋值目标。
```
@FunctionalInterface
public interface DeterminableImports
```
Interface that can be implemented by ImportSelector and ImportBeanDefinitionRegistrar implementations when they can determine imports early. The ImportSelector and ImportBeanDefinitionRegistrar interfaces are quite flexible which can make it hard to tell exactly what bean definitions they will add. This interface should be used when an implementation consistently results in the same imports, given the same source.
Using DeterminableImports is particularly useful when working with Spring's testing support. It allows for better generation of ApplicationContext cache keys.
从以下版本开始:
1.5.0

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`Set<Object>`	`determineImports(org.springframework.core.type.AnnotationMetadata metadata)`	Return a set of objects that represent the imports.

- 方法详细资料
  - determineImports
```
Set<Object> determineImports(org.springframework.core.type.AnnotationMetadata metadata)
```
    Return a set of objects that represent the imports. Objects within the returned Set must implement a valid hashCode and equals.
    Imports from multiple DeterminableImports instances may be combined by the caller to create a complete set.
    Unlike ImportSelector and ImportBeanDefinitionRegistrar any Aware callbacks will not be invoked before this method is called.
    参数:
    metadata - the source meta-data
    返回:
    a key representing the annotations that actually drive the import