00001 /* 00002 * LessEqualsFilter.hpp 00003 * 00004 * Copyright (c) 2000, 2010, 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_LESS_EQUALS_FILTER_HPP 00017 #define COH_LESS_EQUALS_FILTER_HPP 00018 00019 #include "coherence/lang.ns" 00020 00021 #include "coherence/util/ValueExtractor.hpp" 00022 #include "coherence/util/filter/ComparisonFilter.hpp" 00023 #include "coherence/util/filter/IndexAwareFilter.hpp" 00024 00025 COH_OPEN_NAMESPACE3(coherence,util,filter) 00026 00027 00028 /** 00029 * Filter which compares the result of a method invocation with a value for 00030 * "Less or Equals" condition. In a case when either result of a method 00031 * invocation or a value to compare are equal to null, the <tt>evaluate</tt> 00032 * test yields <tt>false</tt>. This approach is equivalent to the way 00033 * the NULL values are handled by SQL. 00034 * 00035 * @author djl 2008.03.24 00036 */ 00037 class COH_EXPORT LessEqualsFilter 00038 : public class_spec<LessEqualsFilter, 00039 extends<ComparisonFilter>, 00040 implements<IndexAwareFilter> > 00041 { 00042 friend class factory<LessEqualsFilter>; 00043 00044 // ----- constructors --------------------------------------------------- 00045 00046 protected: 00047 /** 00048 * Default constructor (necessary for the PortableObject interface). 00049 */ 00050 LessEqualsFilter(); 00051 00052 /** 00053 * Construct a LessEqualsFilter for testing "Less or Equals" condition. 00054 * 00055 * @param vValueExtractor the ValueExtractor to use by this filter 00056 * @param vComparable the object to compare the result with 00057 */ 00058 LessEqualsFilter(ValueExtractor::View vValueExtractor, 00059 Comparable::View vComparable); 00060 00061 00062 // ----- ExtractorFilter interface -------------------------------------- 00063 00064 protected: 00065 /** 00066 * {@inheritDoc} 00067 */ 00068 virtual bool evaluateExtracted(Object::View vExtracted) const; 00069 00070 00071 // ----- IndexAwareFilter interface ------------------------------------- 00072 00073 public: 00074 /** 00075 * {@inheritDoc} 00076 */ 00077 virtual size32_t calculateEffectiveness(Map::View vMapIndexes, 00078 Set::View vSetKeys) const; 00079 00080 /** 00081 * {@inheritDoc} 00082 */ 00083 virtual Filter::View applyIndex(Map::View vMapIndexes, 00084 Set::Handle hSetKeys) const; 00085 }; 00086 00087 COH_CLOSE_NAMESPACE3 00088 00089 #endif // COH_LESS_EQUALS_FILTER_HPP