import org.springframework.core.env.EnvironmentCapable; //导入依赖的package包/类
/**
 * Create a new AbstractBeanDefinitionReader for the given bean factory.
 * <p>If the passed-in bean factory does not only implement the BeanDefinitionRegistry
 * interface but also the ResourceLoader interface, it will be used as default
 * ResourceLoader as well. This will usually be the case for
 * {@link org.springframework.context.ApplicationContext} implementations.
 * <p>If given a plain BeanDefinitionRegistry, the default ResourceLoader will be a
 * {@link org.springframework.core.io.support.PathMatchingResourcePatternResolver}.
 * <p>If the the passed-in bean factory also implements {@link EnvironmentCapable} its
 * environment will be used by this reader.  Otherwise, the reader will initialize and
 * use a {@link StandardEnvironment}. All ApplicationContext implementations are
 * EnvironmentCapable, while normal BeanFactory implementations are not.
 * @param registry the BeanFactory to load bean definitions into,
 * in the form of a BeanDefinitionRegistry
 * @see #setResourceLoader
 * @see #setEnvironment
 */
protected AbstractBeanDefinitionReader(BeanDefinitionRegistry registry) {
	Assert.notNull(registry, "BeanDefinitionRegistry must not be null");
	this.registry = registry;

	// Determine ResourceLoader to use.
	if (this.registry instanceof ResourceLoader) {
		this.resourceLoader = (ResourceLoader) this.registry;
	}
	else {
		this.resourceLoader = new PathMatchingResourcePatternResolver();
	}

	// Inherit Environment if possible
	if (this.registry instanceof EnvironmentCapable) {
		this.environment = ((EnvironmentCapable) this.registry).getEnvironment();
	}
	else {
		this.environment = new StandardEnvironment();
	}
}
 

import org.springframework.core.env.EnvironmentCapable; //导入依赖的package包/类
/**
 * Create a new AbstractBeanDefinitionReader for the given bean factory.
 * <p>If the passed-in bean factory does not only implement the BeanDefinitionRegistry
 * interface but also the ResourceLoader interface, it will be used as default
 * ResourceLoader as well. This will usually be the case for
 * {@link org.springframework.context.ApplicationContext} implementations.
 * <p>If given a plain BeanDefinitionRegistry, the default ResourceLoader will be a
 * {@link org.springframework.core.io.support.PathMatchingResourcePatternResolver}.
 * <p>If the passed-in bean factory also implements {@link EnvironmentCapable} its
 * environment will be used by this reader.  Otherwise, the reader will initialize and
 * use a {@link StandardEnvironment}. All ApplicationContext implementations are
 * EnvironmentCapable, while normal BeanFactory implementations are not.
 * @param registry the BeanFactory to load bean definitions into,
 * in the form of a BeanDefinitionRegistry
 * @see #setResourceLoader
 * @see #setEnvironment
 */
protected AbstractBeanDefinitionReader(BeanDefinitionRegistry registry) {
	Assert.notNull(registry, "BeanDefinitionRegistry must not be null");
	this.registry = registry;

	// Determine ResourceLoader to use.
	if (this.registry instanceof ResourceLoader) {
		this.resourceLoader = (ResourceLoader) this.registry;
	}
	else {
		this.resourceLoader = new PathMatchingResourcePatternResolver();
	}

	// Inherit Environment if possible
	if (this.registry instanceof EnvironmentCapable) {
		this.environment = ((EnvironmentCapable) this.registry).getEnvironment();
	}
	else {
		this.environment = new StandardEnvironment();
	}
}
 

import org.springframework.core.env.EnvironmentCapable; //导入依赖的package包/类
public void testAppContextClassHierarchy() {
	Class[] clazz = ClassUtils.getClassHierarchy(OsgiBundleXmlApplicationContext.class,
		ClassUtils.INCLUDE_ALL_CLASSES);

	Class[] expected = new Class[] { OsgiBundleXmlApplicationContext.class, 
			AbstractDelegatedExecutionApplicationContext.class, DelegatedExecutionOsgiBundleApplicationContext.class,
			ConfigurableOsgiBundleApplicationContext.class, ConfigurableApplicationContext.class, ApplicationContext.class,
			Lifecycle.class, Closeable.class, EnvironmentCapable.class, ListableBeanFactory.class,
			HierarchicalBeanFactory.class, MessageSource.class, ApplicationEventPublisher.class,
			ResourcePatternResolver.class, BeanFactory.class, ResourceLoader.class, AutoCloseable.class,
			AbstractOsgiBundleApplicationContext.class, AbstractRefreshableApplicationContext.class,
			AbstractApplicationContext.class, DisposableBean.class, DefaultResourceLoader.class };
	String msg = "Class: ";
	for (int i=0;i<clazz.length;i++) {
		msg += clazz[i].getSimpleName() + " ";
	}
	assertTrue(msg, compareArrays(expected, clazz));
}
 

import org.springframework.core.env.EnvironmentCapable; //导入依赖的package包/类
public void testInterfacesHierarchy() {
       //Closeable.class,
	Class<?>[] clazz = ClassUtils.getAllInterfaces(DelegatedExecutionOsgiBundleApplicationContext.class);
	Class<?>[] expected =
			{ ConfigurableOsgiBundleApplicationContext.class, ConfigurableApplicationContext.class,
					ApplicationContext.class, Lifecycle.class, Closeable.class, EnvironmentCapable.class, ListableBeanFactory.class,
					HierarchicalBeanFactory.class, MessageSource.class, ApplicationEventPublisher.class,
					ResourcePatternResolver.class, BeanFactory.class, ResourceLoader.class, AutoCloseable.class };

	assertTrue(compareArrays(expected, clazz));
}
 

import org.springframework.core.env.EnvironmentCapable; //导入依赖的package包/类
public void testAppContextClassHierarchy() {
	Class<?>[] clazz =
			ClassUtils.getClassHierarchy(OsgiBundleXmlApplicationContext.class, ClassUtils.ClassSet.ALL_CLASSES);

       //Closeable.class,
	Class<?>[] expected =
			new Class<?>[] { OsgiBundleXmlApplicationContext.class,
					AbstractDelegatedExecutionApplicationContext.class, AbstractOsgiBundleApplicationContext.class,
					AbstractRefreshableApplicationContext.class, AbstractApplicationContext.class,
					DefaultResourceLoader.class, ResourceLoader.class,
					AutoCloseable.class,
					DelegatedExecutionOsgiBundleApplicationContext.class,
					ConfigurableOsgiBundleApplicationContext.class, ConfigurableApplicationContext.class,
					ApplicationContext.class, Lifecycle.class, Closeable.class, EnvironmentCapable.class, ListableBeanFactory.class,
					HierarchicalBeanFactory.class, ApplicationEventPublisher.class, ResourcePatternResolver.class,
					MessageSource.class, BeanFactory.class, DisposableBean.class };

	assertTrue(compareArrays(expected, clazz));
}
 

import org.springframework.core.env.EnvironmentCapable; //导入依赖的package包/类
/**
 * Get the Environment from the given registry if possible, otherwise return a new
 * StandardEnvironment.
 */
private static Environment getOrCreateEnvironment(BeanDefinitionRegistry registry) {
	Assert.notNull(registry, "BeanDefinitionRegistry must not be null");
	if (registry instanceof EnvironmentCapable) {
		return ((EnvironmentCapable) registry).getEnvironment();
	}
	return new StandardEnvironment();
}
 

import org.springframework.core.env.EnvironmentCapable; //导入依赖的package包/类
public void testInterfacesHierarchy() {
	Class[] clazz = ClassUtils.getAllInterfaces(DelegatedExecutionOsgiBundleApplicationContext.class);
	Class[] expected = { ConfigurableOsgiBundleApplicationContext.class, ConfigurableApplicationContext.class, 
			ApplicationContext.class, Lifecycle.class, Closeable.class, EnvironmentCapable.class, 
			ListableBeanFactory.class, HierarchicalBeanFactory.class, MessageSource.class, ApplicationEventPublisher.class, 
			ResourcePatternResolver.class, BeanFactory.class, ResourceLoader.class, AutoCloseable.class };

	String msg = "Class: ";
	for (int i=0;i<clazz.length;i++) {
		msg += clazz[i].getSimpleName() + " ";
	}
	assertTrue(msg, compareArrays(expected, clazz));
}
 

import org.springframework.core.env.EnvironmentCapable; //导入依赖的package包/类
private Environment deduceEnvironment(BeanDefinitionRegistry source) {
	if (source instanceof EnvironmentCapable) {
		return ((EnvironmentCapable) source).getEnvironment();
	}
	return null;
}