ConfigurationPropertiesScan (spring-boot 2.2.0.RELEASE)

```
@Target(value=TYPE)
 @Retention(value=RUNTIME)
 @Documented
 @Import(value=org.springframework.boot.context.properties.ConfigurationPropertiesScanRegistrar.class)
 @EnableConfigurationProperties
public @interface ConfigurationPropertiesScan
```
Configures the base packages used when scanning for @ConfigurationProperties classes. One of basePackageClasses(), basePackages() or its alias value() may be specified to define specific packages to scan. If specific packages are not defined scanning will occur from the package of the class with this annotation.
Note: Classes annotated or meta-annotated with @Component will not be picked up by this annotation.

Since:

2.2.0

Author:

Madhura Bhave

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element and Description
`Class<?>[]`	`basePackageClasses` Type-safe alternative to `basePackages()` for specifying the packages to scan for configuration properties.
`String[]`	`basePackages` Base packages to scan for configuration properties.
`String[]`	`value` Alias for the `basePackages()` attribute.

- Element Detail
  - value
```
@AliasFor(value="basePackages")
public abstract String[] value
```
    Alias for the basePackages() attribute. Allows for more concise annotation declarations e.g.: @ConfigurationPropertiesScan("org.my.pkg") instead of @ConfigurationPropertiesScan(basePackages="org.my.pkg").
    
    Returns:
    
    the base packages to scan
    
    Default:
    
    {}
- - basePackages
```
@AliasFor(value="value")
public abstract String[] basePackages
```
    Base packages to scan for configuration properties. value() is an alias for (and mutually exclusive with) this attribute.
    Use basePackageClasses() for a type-safe alternative to String-based package names.
    
    Returns:
    
    the base packages to scan
    
    Default:
    
    {}
- - basePackageClasses
```
public abstract Class<?>[] basePackageClasses
```
    Type-safe alternative to basePackages() for specifying the packages to scan for configuration properties. The package of each class specified will be scanned.
    Consider creating a special no-op marker class or interface in each package that serves no purpose other than being referenced by this attribute.
    
    Returns:
    
    classes from the base packages to scan
    
    Default:
    
    {}

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