ognl.NullHandler Maven / Gradle / Ivy
//--------------------------------------------------------------------------
// Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
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// Redistributions in binary form must reproduce the above copyright
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// documentation and/or other materials provided with the distribution.
// Neither the name of the Drew Davidson nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
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//--------------------------------------------------------------------------
package ognl;
import java.util.Map;
/**
* Interface for handling null results from Chains.
* Object has the opportunity to substitute an object for the
* null and continue.
* @author Luke Blanshard ([email protected])
* @author Drew Davidson ([email protected])
*/
public interface NullHandler
{
/**
Method called on target returned null.
*/
public Object nullMethodResult(Map context, Object target, String methodName, Object[] args);
/**
Property in target evaluated to null. Property can be a constant
String property name or a DynamicSubscript.
*/
public Object nullPropertyValue(Map context, Object target, Object property);
}