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

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org.springframework.web.struts
Class DelegatingActionUtils

java.lang.Object
  org.springframework.web.struts.DelegatingActionUtils

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public abstract class DelegatingActionUtils
extends Object

Common methods for letting Struts Actions work with a Spring WebApplicationContext.

As everything in Struts is based on concrete inheritance, we have to provide an Action subclass (DelegatingActionProxy) and two RequestProcessor subclasses (DelegatingRequestProcessor and DelegatingTilesRequestProcessor). The only way to share common functionality is a utility class like this one.

Since:

1.0.2

Author:

Juergen Hoeller

See Also:

DelegatingActionProxy, DelegatingRequestProcessor, DelegatingTilesRequestProcessor

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Field Summary
static String	AUTOWIRE_BY_NAME           Value of the autowire init-param that indicates autowiring by name: "byName"
static String	AUTOWIRE_BY_TYPE           Value of the autowire init-param that indicates autowiring by type: "byType"
static String	PARAM_AUTOWIRE           The name of the autowire init-param specified on the Struts ActionServlet: "spring.autowire"
static String	PARAM_DEPENDENCY_CHECK           The name of the dependency check init-param specified on the Struts ActionServlet: "spring.dependencyCheck"

 

Constructor Summary
DelegatingActionUtils()

 

Method Summary
static String	determineActionBeanName(ActionMapping mapping)           Default implementation of Action bean determination, taking the mapping path and prepending the module prefix, if any.
static WebApplicationContext	findRequiredWebApplicationContext(ActionServlet actionServlet, ModuleConfig moduleConfig)           Find most specific context available: check ContextLoaderPlugIn's WebApplicationContext first, fall back to root WebApplicationContext else.
static int	getAutowireMode(ActionServlet actionServlet)           Determine the autowire mode from the "autowire" init-param of the Struts ActionServlet, falling back to "AUTOWIRE_BY_TYPE" as default.
static boolean	getDependencyCheck(ActionServlet actionServlet)           Determine the dependency check to use from the "dependencyCheck" init-param of the Struts ActionServlet, falling back to no dependency check as default.
static WebApplicationContext	getRequiredWebApplicationContext(ActionServlet actionServlet, ModuleConfig moduleConfig)           Fetch ContextLoaderPlugIn's WebApplicationContext from the ServletContext.
static WebApplicationContext	getWebApplicationContext(ActionServlet actionServlet, ModuleConfig moduleConfig)           Fetch ContextLoaderPlugIn's WebApplicationContext from the ServletContext.

 

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

 

Field Detail

PARAM_AUTOWIRE

public static final String PARAM_AUTOWIRE

The name of the autowire init-param specified on the Struts ActionServlet: "spring.autowire"

See Also:

Constant Field Values

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PARAM_DEPENDENCY_CHECK

public static final String PARAM_DEPENDENCY_CHECK

The name of the dependency check init-param specified on the Struts ActionServlet: "spring.dependencyCheck"

See Also:

Constant Field Values

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AUTOWIRE_BY_NAME

public static final String AUTOWIRE_BY_NAME

Value of the autowire init-param that indicates autowiring by name: "byName"

See Also:

Constant Field Values

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AUTOWIRE_BY_TYPE

public static final String AUTOWIRE_BY_TYPE

Value of the autowire init-param that indicates autowiring by type: "byType"

See Also:

Constant Field Values

Constructor Detail

DelegatingActionUtils

public DelegatingActionUtils()

Method Detail

getWebApplicationContext

public static WebApplicationContext getWebApplicationContext(ActionServlet actionServlet,
                                                             ModuleConfig moduleConfig)

Fetch ContextLoaderPlugIn's WebApplicationContext from the ServletContext.

Checks for a module-specific context first, falling back to the context for the default module else.

Parameters:

actionServlet - the associated ActionServlet

moduleConfig - the associated ModuleConfig (can be null)

Returns:

the WebApplicationContext, or null if none

See Also:

ContextLoaderPlugIn.SERVLET_CONTEXT_PREFIX

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getRequiredWebApplicationContext

public static WebApplicationContext getRequiredWebApplicationContext(ActionServlet actionServlet,
                                                                     ModuleConfig moduleConfig)
                                                              throws IllegalStateException

Fetch ContextLoaderPlugIn's WebApplicationContext from the ServletContext.

Checks for a module-specific context first, falling back to the context for the default module else.

Parameters:

actionServlet - the associated ActionServlet

moduleConfig - the associated ModuleConfig (can be null)

Returns:

the WebApplicationContext

Throws:

IllegalStateException - if no WebApplicationContext could be found

See Also:

ContextLoaderPlugIn.SERVLET_CONTEXT_PREFIX

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findRequiredWebApplicationContext

public static WebApplicationContext findRequiredWebApplicationContext(ActionServlet actionServlet,
                                                                      ModuleConfig moduleConfig)
                                                               throws IllegalStateException

Find most specific context available: check ContextLoaderPlugIn's WebApplicationContext first, fall back to root WebApplicationContext else.

When checking the ContextLoaderPlugIn context: checks for a module-specific context first, falling back to the context for the default module else.

Parameters:

actionServlet - the associated ActionServlet

moduleConfig - the associated ModuleConfig (can be null)

Returns:

the WebApplicationContext

Throws:

IllegalStateException - if no WebApplicationContext could be found

See Also:

getWebApplicationContext(org.apache.struts.action.ActionServlet, org.apache.struts.config.ModuleConfig), WebApplicationContextUtils.getRequiredWebApplicationContext(javax.servlet.ServletContext)

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determineActionBeanName

public static String determineActionBeanName(ActionMapping mapping)

Default implementation of Action bean determination, taking the mapping path and prepending the module prefix, if any.

Parameters:

mapping - the Struts ActionMapping

Returns:

the name of the Action bean

See Also:

ActionConfig.getPath(), ModuleConfig.getPrefix()

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getAutowireMode

public static int getAutowireMode(ActionServlet actionServlet)

Determine the autowire mode from the "autowire" init-param of the Struts ActionServlet, falling back to "AUTOWIRE_BY_TYPE" as default.

Parameters:

actionServlet - the Struts ActionServlet

Returns:

the autowire mode to use

See Also:

PARAM_AUTOWIRE, AUTOWIRE_BY_NAME, AUTOWIRE_BY_TYPE, AutowireCapableBeanFactory.autowireBeanProperties(java.lang.Object, int, boolean), AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, AutowireCapableBeanFactory.AUTOWIRE_BY_NAME

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getDependencyCheck

public static boolean getDependencyCheck(ActionServlet actionServlet)

Determine the dependency check to use from the "dependencyCheck" init-param of the Struts ActionServlet, falling back to no dependency check as default.

Parameters:

actionServlet - the Struts ActionServlet

Returns:

whether to enforce a dependency check or not

See Also:

PARAM_DEPENDENCY_CHECK, AutowireCapableBeanFactory.autowireBeanProperties(java.lang.Object, int, boolean)

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