00001 /* 00002 * IsNullFilter.hpp 00003 * 00004 * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. 00005 * 00006 * Oracle is a registered trademarks of Oracle Corporation and/or its 00007 * affiliates. 00008 * 00009 * This software is the confidential and proprietary information of Oracle 00010 * Corporation. You shall not disclose such confidential and proprietary 00011 * information and shall use it only in accordance with the terms of the 00012 * license agreement you entered into with Oracle. 00013 * 00014 * This notice may not be removed or altered. 00015 */ 00016 #ifndef COH_IS_NULL_FILTER_HPP 00017 #define COH_IS_NULL_FILTER_HPP 00018 00019 #include "coherence/lang.ns" 00020 00021 #include "coherence/util/filter/EqualsFilter.hpp" 00022 00023 COH_OPEN_NAMESPACE3(coherence,util,filter) 00024 00025 00026 /** 00027 * Filter which compares the result of a method invocation with null. 00028 * 00029 * @author djl 2008.04.07 00030 */ 00031 class COH_EXPORT IsNullFilter 00032 : public class_spec<IsNullFilter, 00033 extends<EqualsFilter> > 00034 { 00035 friend class factory<IsNullFilter>; 00036 00037 // ----- constructors --------------------------------------------------- 00038 00039 protected: 00040 /** 00041 * Default constructor (necessary for the PortableObject interface). 00042 */ 00043 IsNullFilter(); 00044 00045 /** 00046 * Construct a IsNullFilter for testing equality to null. 00047 * 00048 * @param vValueExtractor the ValueExtractor to use by this filter 00049 */ 00050 IsNullFilter(ValueExtractor::View vValueExtractor); 00051 00052 private: 00053 /** 00054 * Blocked copy constructor. 00055 */ 00056 IsNullFilter(const IsNullFilter&); 00057 }; 00058 00059 COH_CLOSE_NAMESPACE3 00060 00061 #endif // COH_IS_NULL_FILTER_HPP