org.apache.commons.ognl
Interface NullHandler

All Known Implementing Classes:

ObjectNullHandler

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)

nullMethodResult

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

Method called on target returned null.

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.