ReflectiveVisitorHelper (Spring Framework) - Spring Framework 1.2.9 API 文档英文版

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org.springframework.core
Class ReflectiveVisitorHelper

java.lang.Object
  org.springframework.core.ReflectiveVisitorHelper

public final class ReflectiveVisitorHelper
extends Object
extends Object

Helper implementation for a reflective visitor. Mainly for internal use within the framework.

To use, call invokeVisit, passing a Visitor object and the data argument to accept (double-dispatch). For example:

   public String styleValue(Object value) {
     reflectiveVistorSupport.invokeVisit(this, value)
   }
  
   // visit call back will be invoked via reflection
   String visit(<valueType> arg) {
     // process argument of type <valueType>
   }

See the DefaultValueStyler class for a concrete usage.

Since:: 1.2.2
Author:: Keith Donald
See Also:: DefaultValueStyler

Constructor Summary

ReflectiveVisitorHelper()

Method Summary

Object invokeVisit(Object visitor, Object argument)
Use reflection to call the appropriate visit method on the provided visitor, passing in the specified argument.

Methods inherited from class java.lang.Object

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

Constructor Summary
`ReflectiveVisitorHelper()`

Method Summary
`Object`	`invokeVisit(Object visitor, Object argument)` Use reflection to call the appropriate `visit` method on the provided visitor, passing in the specified argument.

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

Constructor Detail

ReflectiveVisitorHelper

public ReflectiveVisitorHelper()

Method Detail

invokeVisit

public Object invokeVisit(Object visitor,
                          Object argument)

Use reflection to call the appropriate visit method on the provided visitor, passing in the specified argument.

Parameters:: visitor - the visitor encapsulating the logic to process the argument; argument - the argument to dispatch
Throws:: IllegalArgumentException - if the visitor parameter is null