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SimplePropertyNamespaceHandler (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.beans.factory.xml
Class SimplePropertyNamespaceHandler

java.lang.Object
  org.springframework.beans.factory.xml.SimplePropertyNamespaceHandler

All Implemented Interfaces:

NamespaceHandler

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public class SimplePropertyNamespaceHandler
extends Object
implements NamespaceHandler

Simple NamespaceHandler implementation that maps custom attributes directly through to bean properties. An important point to note is that this NamespaceHandler does not have a corresponding schema since there is no way to know in advance all possible attribute names.

An example of the usage of this NamespaceHandler is shown below:

 <bean id="rob" class="..TestBean" p:name="Rob Harrop" p:spouse-ref="sally"/>

Here the 'p:name' corresponds directly to the 'name' property on class 'TestBean'. The 'p:spouse-ref' attributes corresponds to the 'spouse' property and, rather than being the concrete value, it contains the name of the bean that will be injected into that property.

Since:

2.0

Author:

Rob Harrop

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Constructor Summary
SimplePropertyNamespaceHandler()

 

Method Summary
BeanDefinitionHolder	decorate(Node node, 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 BeanDefinitions with the BeanDefinitionRegistry that is embedded in the supplied ParserContext.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

SimplePropertyNamespaceHandler

public SimplePropertyNamespaceHandler()

Method Detail

init

public void init()

Description copied from interface: NamespaceHandler

Invoked by the DefaultBeanDefinitionDocumentReader after construction but before any custom elements are parsed.

Specified by:

init in interface NamespaceHandler

See Also:

NamespaceHandlerSupport.registerBeanDefinitionParser(String, BeanDefinitionParser)

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parse

public BeanDefinition parse(Element element,
                            ParserContext parserContext)

Description copied from interface: NamespaceHandler

Parse the specified Element and register any resulting BeanDefinitions with the 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.

Specified by:

parse in interface NamespaceHandler

Parameters:

element - the element that is to be parsed into one or more BeanDefinitions

parserContext - the object encapsulating the current state of the parsing process

Returns:

the primary BeanDefinition (can be null as explained above)

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decorate

public BeanDefinitionHolder decorate(Node node,
                                     BeanDefinitionHolder definition,
                                     ParserContext parserContext)

Description copied from interface: NamespaceHandler

Parse the specified Node and decorate the supplied BeanDefinitionHolder, returning the decorated definition.

The Node may be either an 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 BeanFactory.

The supplied ParserContext can be used to register any additional beans needed to support the main definition.

Specified by:

decorate in interface NamespaceHandler

Parameters:

node - the source element or attribute that is to be parsed

definition - the current bean definition

parserContext - the object encapsulating the current state of the parsing process

Returns:

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 leniently treated like the case where the original bean definition gets returned.

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