ognl

Class ObjectNullHandler

java.lang.Object

ognl.ObjectNullHandler

All Implemented Interfaces:

NullHandler

public class ObjectNullHandler
extends Object
implements NullHandler

Implementation of NullHandler that returns null in all cases, so that NullPointerException will be thrown by the caller.

Author:

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

Constructor Summary

Constructors

Constructor and Description
ObjectNullHandler()

Method Summary

Methods

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectNullHandler

public ObjectNullHandler()

Method Detail

nullMethodResult

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

Description copied from interface: NullHandler

Method called on target returned null.

Specified by:

nullMethodResult in interface NullHandler

Parameters:

context - the current execution context.

target - the Object on which the method was called.

methodName - the name of the method which was called.

args - the arguments to the method that was called.

Returns:

the result Object containing the state of the method call that returned null.

nullPropertyValue

public Object nullPropertyValue(Map context,
                       Object target,
                       Object property)

Description copied from interface: NullHandler

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

Specified by:

nullPropertyValue in interface NullHandler

Parameters:

context - the current execution context.

target - the Object to which the property belongs.

property - the property whose value evaluated to null.

Returns:

the result Object containing the state of the property that evaluated to null.