org.apache.ibatis.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:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// 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.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// DAMAGE.
//--------------------------------------------------------------------------
package org.apache.ibatis.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);
}