00001 /* 00002 * Copyright (c) 2000, 2020, Oracle and/or its affiliates. 00003 * 00004 * Licensed under the Universal Permissive License v 1.0 as shown at 00005 * http://oss.oracle.com/licenses/upl. 00006 */ 00007 #ifndef COH_ABSTRACT_FLOAT64_AGGREGATOR_HPP 00008 #define COH_ABSTRACT_FLOAT64_AGGREGATOR_HPP 00009 00010 #include "coherence/lang.ns" 00011 00012 #include "coherence/util/aggregator/AbstractAggregator.hpp" 00013 #include "coherence/util/ValueExtractor.hpp" 00014 00015 COH_OPEN_NAMESPACE3(coherence,util,aggregator) 00016 00017 00018 /** 00019 * Abstract aggregator that processes numeric values extracted from a set of 00020 * entries in a Map. All the extracted Number objects will be treated as 00021 * <tt>float64_t</tt> values and the result of the aggregator is a Float64. 00022 * If the set of entries is empty, a <tt>NULL</tt> result is returned. 00023 * 00024 * @author djl 2008.05.09 00025 */ 00026 class COH_EXPORT AbstractFloat64Aggregator 00027 : public abstract_spec<AbstractFloat64Aggregator, 00028 extends<AbstractAggregator> > 00029 { 00030 // ----- constructors --------------------------------------------------- 00031 00032 protected: 00033 /** 00034 * @internal 00035 */ 00036 AbstractFloat64Aggregator(); 00037 00038 /** 00039 * @internal 00040 */ 00041 AbstractFloat64Aggregator(ValueExtractor::View vExtractor); 00042 00043 /** 00044 * Construct an AbstractFloat64Aggregator that will aggregate values 00045 * extracted from a set of InvocableMap::Entry objects. 00046 * 00047 * @param vsMethod the name of the method that could be invoked via 00048 * reflection and that returns values to aggregate; 00049 * this parameter can also be a dot-delimited 00050 * sequence of method names which would result in 00051 * an aggregator based on the ChainedExtractor that 00052 * is based on an array of corresponding 00053 * ReflectionExtractor objects 00054 * 00055 * @since Coherence 12.1.2 00056 */ 00057 AbstractFloat64Aggregator(String::View vsMethod); 00058 00059 private: 00060 /** 00061 * Blocked copy constructor. 00062 */ 00063 AbstractFloat64Aggregator(const AbstractFloat64Aggregator&); 00064 00065 00066 // ----- AbstractAggregator Interface ---------------------------------- 00067 00068 protected: 00069 /** 00070 * {@inheritDoc} 00071 */ 00072 virtual void init(bool fFinal); 00073 00074 /** 00075 * {@inheritDoc} 00076 */ 00077 virtual Object::Holder finalizeResult(bool fFinal); 00078 00079 00080 // ----- data members --------------------------------------------------- 00081 00082 protected: 00083 /** 00084 * The count of processed entries. 00085 */ 00086 int32_t m_count; 00087 00088 /** 00089 * The running result value. 00090 */ 00091 float64_t m_dflResult; 00092 }; 00093 00094 COH_CLOSE_NAMESPACE3 00095 00096 #endif // COH_ABSTRACT_FLOAT64_AGGREGATOR_HPP