Package org.apache.struts.dispatcher.servlet

Class ServletMethodResolver

java.lang.Object

org.apache.struts.dispatcher.AbstractMethodResolver

org.apache.struts.dispatcher.servlet.ServletMethodResolver

All Implemented Interfaces:

Serializable, MethodResolver

public class ServletMethodResolver
extends AbstractMethodResolver

This class helps resolve methods with servlet-based signatures. The following examples illustrate the method signatures supported:

• return_type execute()
• return_type execute(ActionContext context)
• return_type execute(ServletActionContext context)
• return_type execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)

Since:

Struts 1.4

Version:

$Rev$

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.apache.struts.dispatcher.AbstractMethodResolver

EMPTY_ARGUMENT_TYPES, EMPTY_ARGUMENTS

Constructor Summary

Constructors

Constructor	Description
ServletMethodResolver()

Method Summary

Modifier and Type	Method	Description
Object[]	buildArguments(ActionContext context, Method method)	Constructs the arguments that will be passed to the dispatched method.
protected final Object[]	buildClassicArguments(ServletActionContext context)	Constructs the arguments to invoke the classic execute servlet signature from the specified context.
protected final Method	resolveClassicMethod(ActionContext context, String methodName)	Obtains the method instance with the classic execute servlet signature.
Method	resolveMethod(ActionContext context, String methodName)	Decides the appropriate method instance for the specified method name.

Methods inherited from class java.lang.Object

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

Constructor Details

ServletMethodResolver

public ServletMethodResolver()

Method Details

buildArguments

public Object[] buildArguments(ActionContext context,
 Method method)

Description copied from interface: MethodResolver

Constructs the arguments that will be passed to the dispatched method.

Specified by:

buildArguments in interface MethodResolver

Overrides:

buildArguments in class AbstractMethodResolver

Parameters:

context - the current action context

method - the target method of this dispatch

Returns:

the arguments array for the method, or null if the method does not match any supported signatures

See Also:

• MethodResolver.resolveMethod(ActionContext, String)

buildClassicArguments

protected final Object[] buildClassicArguments(ServletActionContext context)

Constructs the arguments to invoke the classic execute servlet signature from the specified context.

Parameters:

context - the current context

Returns:

the arguments array

Throws:

NullPointerException - if context is null

See Also:

• resolveClassicMethod(ActionContext, String)

resolveClassicMethod

protected final Method resolveClassicMethod(ActionContext context,
 String methodName)
                                     throws NoSuchMethodException

Obtains the method instance with the classic execute servlet signature.

Parameters:

context - the current context

methodName - the method name to introspect

Returns:

the found method in the action

Throws:

NullPointerException - if context is null

NoSuchMethodException - if the method does not exist

See Also:

• buildClassicArguments(ServletActionContext)
• Action.execute(ActionMapping, ActionForm, jakarta.servlet.ServletRequest, jakarta.servlet.ServletResponse)

resolveMethod

public Method resolveMethod(ActionContext context,
 String methodName)
                     throws NoSuchMethodException

Description copied from interface: MethodResolver

Decides the appropriate method instance for the specified method name. Implementations may introspect for any desired method signature.

Specified by:

resolveMethod in interface MethodResolver

Overrides:

resolveMethod in class AbstractMethodResolver

Parameters:

context - the current action context

methodName - the method name to use for introspection

Returns:

the method to invoke

Throws:

NoSuchMethodException - if an appropriate method cannot be found