com.opensymphony.xwork2.conversion

Interface NullHandler

All Known Implementing Classes:

InstantiatingNullHandler

public interface NullHandler

Interface for handling null results from Chains. Object has the opportunity to substitute an object for the null and continue.

Author:

Luke Blanshard (blanshlu@netscape.net), Drew Davidson (drew@ognl.org)

Method Summary

Modifier and Type	Method and Description
Object	nullMethodResult(Map<String,Object> context, Object target, String methodName, Object[] args) Method called on target returned null.
Object	nullPropertyValue(Map<String,Object> context, Object target, Object property) Property in target evaluated to null.

Method Detail

nullMethodResult

Object nullMethodResult(Map<String,Object> context,
                        Object target,
                        String methodName,
                        Object[] args)

Method called on target returned null.

Parameters:

context - context

target - target object

methodName - method name

args - arguments

Returns:

object

nullPropertyValue

Object nullPropertyValue(Map<String,Object> context,
                         Object target,
                         Object property)

Property in target evaluated to null. Property can be a constant String property name or a DynamicSubscript.

Parameters:

context - context

target - target object

property - property

Returns:

object