ariba.util.expr
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)

Method Summary

java.lang.Object	nullMethodResult(java.util.Map context, java.lang.Object target, java.lang.String methodName, java.lang.Object[] args) Method called on target returned null.
java.lang.Object	nullPropertyValue(java.util.Map context, java.lang.Object target, java.lang.Object property) Property in target evaluated to null.

Method Detail

nullMethodResult

java.lang.Object nullMethodResult(java.util.Map context,
                                  java.lang.Object target,
                                  java.lang.String methodName,
                                  java.lang.Object[] args)

Method called on target returned null.

nullPropertyValue

java.lang.Object nullPropertyValue(java.util.Map context,
                                   java.lang.Object target,
                                   java.lang.Object property)

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