Package org.apache.struts.dispatcher

Class AbstractMethodResolver

java.lang.Object

org.apache.struts.dispatcher.AbstractMethodResolver

All Implemented Interfaces:

Serializable, MethodResolver

Direct Known Subclasses:

ServletMethodResolver

public abstract class AbstractMethodResolver
extends Object
implements MethodResolver

This abstract class is the stock template for resolving methods for a Dispatcher. The implementation handles methods that accept no arguments or only an ActionContext instance:

• return_type execute()
• return_type execute(ActionContext context)

Since:

Struts 1.4

Version:

$Rev$

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected static final Class<?>[]	EMPTY_ARGUMENT_TYPES	The type listing used for a method without arguments.
protected static final Object[]	EMPTY_ARGUMENTS	The argument listing for a method without arguments.

Constructor Summary

Constructors

Constructor	Description
AbstractMethodResolver()

Method Summary

Modifier and Type	Method	Description
Object[]	buildArguments(ActionContext context, Method method)	Constructs the arguments that will be passed to the dispatched method.
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

Field Details

EMPTY_ARGUMENTS

protected static final Object[] EMPTY_ARGUMENTS

The argument listing for a method without arguments.

See Also:

• EMPTY_ARGUMENT_TYPES

EMPTY_ARGUMENT_TYPES

protected static final Class<?>[] EMPTY_ARGUMENT_TYPES

The type listing used for a method without arguments.

See Also:

• EMPTY_ARGUMENTS

Constructor Details

AbstractMethodResolver

public AbstractMethodResolver()

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

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)

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

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