链式调用时为未初始化值或无默认值导致NPE问题(如果配置类为做新版本兼容配置项)

[BingChunMoLi]

public class SwaggerProperties{
    private List<SwaggerProperties.GlobalOperationParameter> globalOperationParameters;
}
public class DocketConfiguration implements BeanFactoryAware{
docket4Group.host(this.swaggerProperties.getHost()).apiInfo(apiInfo).globalRequestParameters(this.assemblyRequestParameters(this.swaggerProperties.getGlobalOperationParameters(), new ArrayList())).securityContexts(Collections.singletonList(this.authConfiguration.securityContext())).securitySchemes(this.authConfiguration.getSecuritySchemes()).select().apis(RequestHandlerSelectors.basePackage(this.swaggerProperties.getBasePackage())).paths(this.paths(this.swaggerProperties.getBasePath(), this.swaggerProperties.getExcludePath())).build();
}
//第74行 public void createSpringFoxRestApi(){}

如项目中未配置

swagger.globalOperationParameters[0].name=name one
swagger.globalOperationParameters[0].description=some description one

NPE
堆栈信息:
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'createSpringFoxRestApi' defined in class path resource [com/spring4all/swagger/DocketConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [void]: Factory method 'createSpringFoxRestApi' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:486)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:656)
... 34 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [void]: Factory method 'createSpringFoxRestApi' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653)
... 49 common frames omitted
Caused by: java.lang.NullPointerException: null
at com.spring4all.swagger.DocketConfiguration.getRequestParameters(DocketConfiguration.java:153)
at com.spring4all.swagger.DocketConfiguration.assemblyRequestParameters(DocketConfiguration.java:175)
at com.spring4all.swagger.DocketConfiguration.createSpringFoxRestApi(DocketConfiguration.java:79)
at com.spring4all.swagger.DocketConfiguration$$EnhancerBySpringCGLIB$$25e37900.CGLIB$createSpringFoxRestApi$1()
at com.spring4all.swagger.DocketConfiguration$$EnhancerBySpringCGLIB$$25e37900$$FastClassBySpringCGLIB$$3cd76e23.invoke()
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331)
at com.spring4all.swagger.DocketConfiguration$$EnhancerBySpringCGLIB$$25e37900.createSpringFoxRestApi()
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
... 50 common frames omitted

[MR03web]

2.5.6测试，至少需要配置一个globalOperationParameters

[BingChunMoLi]

我希望是，如果简单项目或新手可以不配置该选项，至少能启动会比较好，给予默认值或者基本的初始化，所以我认为这是一个BUG