Class AbstractSingleBeanDefinitionParser

java.lang.Object

org.springframework.beans.factory.xml.AbstractBeanDefinitionParser

org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser

All Implemented Interfaces:

BeanDefinitionParser

Direct Known Subclasses:

AbstractSimpleBeanDefinitionParser, ExecutorBeanDefinitionParser, FreeMarkerConfigurerBeanDefinitionParser, JtaTransactionManagerBeanDefinitionParser, ScheduledTasksBeanDefinitionParser, SchedulerBeanDefinitionParser

public abstract class AbstractSingleBeanDefinitionParser
extends AbstractBeanDefinitionParser

Base class for those BeanDefinitionParser implementations that need to parse and define just a single BeanDefinition.

Extend this parser class when you want to create a single bean definition from an arbitrarily complex XML element. You may wish to consider extending the AbstractSimpleBeanDefinitionParser when you want to create a single bean definition from a relatively simple custom XML element.

The resulting BeanDefinition will be automatically registered with the BeanDefinitionRegistry. Your job simply is to parse the custom XML Element into a single BeanDefinition.

Since:

2.0

Author:

Rob Harrop, Juergen Hoeller, Rick Evans

See Also:

• getBeanClass(org.w3c.dom.Element)
• getBeanClassName(org.w3c.dom.Element)
• doParse(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext, org.springframework.beans.factory.support.BeanDefinitionBuilder)

Field Summary

Fields inherited from class org.springframework.beans.factory.xml.AbstractBeanDefinitionParser

ID_ATTRIBUTE, NAME_ATTRIBUTE

Constructor Summary

Constructors

Constructor	Description
AbstractSingleBeanDefinitionParser()

Method Summary

Modifier and Type	Method	Description
protected void	doParse(Element element, BeanDefinitionBuilder builder)	Parse the supplied Element and populate the supplied BeanDefinitionBuilder as required.
protected void	doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder)	Parse the supplied Element and populate the supplied BeanDefinitionBuilder as required.
protected @Nullable Class<?>	getBeanClass(Element element)	Determine the bean class corresponding to the supplied Element.
protected @Nullable String	getBeanClassName(Element element)	Determine the bean class name corresponding to the supplied Element.
protected @Nullable String	getParentName(Element element)	Determine the name for the parent of the currently parsed bean, in case of the current bean being defined as a child bean.
protected final AbstractBeanDefinition	parseInternal(Element element, ParserContext parserContext)	Creates a BeanDefinitionBuilder instance for the bean Class and passes it to the doParse(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext, org.springframework.beans.factory.support.BeanDefinitionBuilder) strategy method.

Methods inherited from class org.springframework.beans.factory.xml.AbstractBeanDefinitionParser

parse, postProcessComponentDefinition, registerBeanDefinition, resolveId, shouldFireEvents, shouldGenerateId, shouldGenerateIdAsFallback, shouldParseNameAsAliases

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AbstractSingleBeanDefinitionParser

public AbstractSingleBeanDefinitionParser()

Method Details

parseInternal

protected final AbstractBeanDefinition parseInternal(Element element,
 ParserContext parserContext)

Creates a BeanDefinitionBuilder instance for the bean Class and passes it to the doParse(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext, org.springframework.beans.factory.support.BeanDefinitionBuilder) strategy method.

Specified by:

parseInternal in class AbstractBeanDefinitionParser

Parameters:

element - the element that is to be parsed into a single BeanDefinition

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

Returns:

the BeanDefinition resulting from the parsing of the supplied Element

Throws:

IllegalStateException - if the bean Class returned from getBeanClass(org.w3c.dom.Element) is null

See Also:

• doParse(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext, org.springframework.beans.factory.support.BeanDefinitionBuilder)

getParentName

protected @Nullable String getParentName(Element element)

Determine the name for the parent of the currently parsed bean, in case of the current bean being defined as a child bean.

The default implementation returns null, indicating a root bean definition.

Parameters:

element - the Element that is being parsed

Returns:

the name of the parent bean for the currently parsed bean, or null if none

getBeanClass

protected @Nullable Class<?> getBeanClass(Element element)

Determine the bean class corresponding to the supplied Element.

Note that, for application classes, it is generally preferable to override getBeanClassName(org.w3c.dom.Element) instead, in order to avoid a direct dependence on the bean implementation class. The BeanDefinitionParser and its NamespaceHandler can be used within an IDE plugin then, even if the application classes are not available on the plugin's classpath.

Parameters:

element - the Element that is being parsed

Returns:

the Class of the bean that is being defined via parsing the supplied Element, or null if none

See Also:

• getBeanClassName(org.w3c.dom.Element)

getBeanClassName

protected @Nullable String getBeanClassName(Element element)

Determine the bean class name corresponding to the supplied Element.

Parameters:

element - the Element that is being parsed

Returns:

the class name of the bean that is being defined via parsing the supplied Element, or null if none

See Also:

• getBeanClass(org.w3c.dom.Element)

doParse

protected void doParse(Element element,
 ParserContext parserContext,
 BeanDefinitionBuilder builder)

Parse the supplied Element and populate the supplied BeanDefinitionBuilder as required.

The default implementation delegates to the doParse version without ParserContext argument.

Parameters:

element - the XML element being parsed

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

builder - used to define the BeanDefinition

See Also:

• doParse(Element, BeanDefinitionBuilder)

doParse

protected void doParse(Element element,
 BeanDefinitionBuilder builder)

Parse the supplied Element and populate the supplied BeanDefinitionBuilder as required.

The default implementation does nothing.

Parameters:

element - the XML element being parsed

builder - used to define the BeanDefinition