public class YamlMapFactoryBean extends YamlProcessor implements FactoryBean<Map<String,Object>>, InitializingBean
Map that reads from a YAML source, preserving the
 YAML-declared value types and their structure.
 YAML is a nice human-readable format for configuration, and it has some useful hierarchical properties. It's more or less a superset of JSON, so it has a lot of similar features.
If multiple resources are provided the later ones will override entries in
 the earlier ones hierarchically; that is, all entries with the same nested key
 of type Map at any depth are merged. For example:
 
 foo:
   bar:
    one: two
 three: four
 
 plus (later in the list)
 
 foo:
   bar:
    one: 2
 five: six
 
 results in an effective input of
 
 foo:
   bar:
    one: 2
 three: four
 five: six
 
 Note that the value of "foo" in the first document is not simply replaced
 with the value in the second, but its nested values are merged.
 Requires SnakeYAML 1.18 or higher, as of Spring Framework 5.0.6.
YamlProcessor.DocumentMatcher, YamlProcessor.MatchCallback, YamlProcessor.MatchStatus, YamlProcessor.ResolutionMethodOBJECT_TYPE_ATTRIBUTE| Constructor and Description | 
|---|
| YamlMapFactoryBean() | 
| Modifier and Type | Method and Description | 
|---|---|
| void | afterPropertiesSet()Invoked by the containing  BeanFactoryafter it has set all bean properties
 and satisfiedBeanFactoryAware,ApplicationContextAwareetc. | 
| protected Map<String,Object> | createMap()Template method that subclasses may override to construct the object
 returned by this factory. | 
| Map<String,Object> | getObject()Return an instance (possibly shared or independent) of the object
 managed by this factory. | 
| Class<?> | getObjectType()Return the type of object that this FactoryBean creates,
 or  nullif not known in advance. | 
| boolean | isSingleton()Is the object managed by this factory a singleton? That is,
 will  FactoryBean.getObject()always return the same object
 (a reference that can be cached)? | 
| void | setSingleton(boolean singleton)Set if a singleton should be created, or a new object on each request
 otherwise. | 
createYaml, getFlattenedMap, process, setDocumentMatchers, setMatchDefault, setResolutionMethod, setResourcespublic void setSingleton(boolean singleton)
true (a singleton).public boolean isSingleton()
FactoryBeanFactoryBean.getObject() always return the same object
 (a reference that can be cached)?
 NOTE: If a FactoryBean indicates to hold a singleton object,
 the object returned from getObject() might get cached
 by the owning BeanFactory. Hence, do not return true
 unless the FactoryBean always exposes the same reference.
 
The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.
NOTE: This method returning false does not
 necessarily indicate that returned objects are independent instances.
 An implementation of the extended SmartFactoryBean interface
 may explicitly indicate independent instances through its
 SmartFactoryBean.isPrototype() method. Plain FactoryBean
 implementations which do not implement this extended interface are
 simply assumed to always return independent instances if the
 isSingleton() implementation returns false.
 
The default implementation returns true, since a
 FactoryBean typically manages a singleton instance.
isSingleton in interface FactoryBean<Map<String,Object>>FactoryBean.getObject(), 
SmartFactoryBean.isPrototype()public void afterPropertiesSet()
InitializingBeanBeanFactory after it has set all bean properties
 and satisfied BeanFactoryAware, ApplicationContextAware etc.
 This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.
afterPropertiesSet in interface InitializingBean@Nullable public Map<String,Object> getObject()
FactoryBeanAs with a BeanFactory, this allows support for both the
 Singleton and Prototype design pattern.
 
If this FactoryBean is not fully initialized yet at the time of
 the call (for example because it is involved in a circular reference),
 throw a corresponding FactoryBeanNotInitializedException.
 
As of Spring 2.0, FactoryBeans are allowed to return null
 objects. The factory will consider this as normal value to be used; it
 will not throw a FactoryBeanNotInitializedException in this case anymore.
 FactoryBean implementations are encouraged to throw
 FactoryBeanNotInitializedException themselves now, as appropriate.
getObject in interface FactoryBean<Map<String,Object>>null)FactoryBeanNotInitializedExceptionpublic Class<?> getObjectType()
FactoryBeannull if not known in advance.
 This allows one to check for specific types of beans without instantiating objects, for example on autowiring.
In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.
This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.
NOTE: Autowiring will simply ignore FactoryBeans that return
 null here. Therefore it is highly recommended to implement
 this method properly, using the current state of the FactoryBean.
getObjectType in interface FactoryBean<Map<String,Object>>null if not known at the time of the callListableBeanFactory.getBeansOfType(java.lang.Class<T>)protected Map<String,Object> createMap()
Invoked lazily the first time getObject() is invoked in
 case of a shared singleton; else, on each getObject() call.
 
The default implementation returns the merged Map instance.
YamlProcessor.process(MatchCallback)