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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.beans.factory.xml

Source Cross Reference Class Diagram Java Document (Java Doc)

org.springframework.beans.factory.xml .NamespaceHandler

All known Subclasses:   org.springframework.beans.factory.xml .SimplePropertyNamespaceHandler,  org.springframework.beans.factory.xml .NamespaceHandlerSupport,
NamespaceHandler
public interface NamespaceHandler (Code)
Base interface used by the DefaultBeanDefinitionDocumentReader for handling custom namespaces in a Spring XML configuration file.
Implementations are expected to return implementations of the BeanDefinitionParser interface for custom top-level tags and implementations of the BeanDefinitionDecorator interface for custom nested tags.
The parser will call NamespaceHandler.parse when it encounters a custom tag directly under the <beans> tags and NamespaceHandler.decorate when it encounters a custom tag directly under a <bean> tag.
Developers writing their own custom element extensions typically will not implement this interface drectly, but rather make use of the provided NamespaceHandlerSupport class.
author:
   Rob Harrop
author:
   Erik Wiersma
since:
   2.0
See Also:   DefaultBeanDefinitionDocumentReader
See Also:   NamespaceHandlerResolver

Method Summary
BeanDefinitionHolder decorate(Node source, BeanDefinitionHolder definition, ParserContext parserContext)
     Parse the specified Node and decorate the supplied BeanDefinitionHolder , returning the decorated definition.
void init()
     Invoked by the DefaultBeanDefinitionDocumentReader after construction but before any custom elements are parsed.
BeanDefinition parse(Element element, ParserContext parserContext)
     Parse the specified Element and register any resulting BeanDefinition BeanDefinitions with the org.springframework.beans.factory.support.BeanDefinitionRegistry that is embedded in the supplied ParserContext .

Method Detail
decorate
BeanDefinitionHolder decorate(Node source, BeanDefinitionHolder definition, ParserContext parserContext)(Code)
Parse the specified Node and decorate the supplied BeanDefinitionHolder , returning the decorated definition.
The Node may be either an org.w3c.dom.Attr or an Element , depending on whether a custom attribute or element is being parsed.
Implementations may choose to return a completely new definition, which will replace the original definition in the resulting org.springframework.beans.factory.BeanFactory .
The supplied ParserContext can be used to register any additional beans needed to support the main definition.
Parameters:
  source - the source element or attribute that is to be parsed
Parameters:
  definition - the current bean definition
Parameters:
  parserContext - the object encapsulating the current state of the parsing process the decorated definition (to be registered in the BeanFactory),or simply the original bean definition if no decoration is required.A null value is strictly speaking invalid, but will be lenientlytreated like the case where the original bean definition gets returned.

init
void init()(Code)
Invoked by the DefaultBeanDefinitionDocumentReader after construction but before any custom elements are parsed.
See Also:   NamespaceHandlerSupport.registerBeanDefinitionParser(StringBeanDefinitionParser)
See Also:

parse
BeanDefinition parse(Element element, ParserContext parserContext)(Code)
Parse the specified Element and register any resulting BeanDefinition BeanDefinitions with the org.springframework.beans.factory.support.BeanDefinitionRegistry that is embedded in the supplied ParserContext .
Implementations should return the primary BeanDefinition that results from the parse phase if they wish to be used nested inside (for example) a <property> tag.
Implementations may return null if they will not be used in a nested scenario.
Parameters:
  element - the element that is to be parsed into one or more BeanDefinitions
Parameters:
  parserContext - the object encapsulating the current state of the parsing process the primary BeanDefinition (can be null as explained above)

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