Oracle Coherence for C++ API
Release 3.6.0.0
E15728-01

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# coherence/util/aggregator/ComparableMin.hpp

    00001 /*
    00002 * ComparableMin.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_COMPARABLE_MIN_HPP
    00017 #define COH_COMPARABLE_MIN_HPP
    00018
    00019 #include "coherence/lang.ns"
    00020
    00021 #include "coherence/util/aggregator/AbstractComparableAggregator.hpp"
    00022 #include "coherence/util/ValueExtractor.hpp"
    00023
    00024 COH_OPEN_NAMESPACE3(coherence,util,aggregator)
    00025
    00026
    00027 /**
    00028 * Calculates a minimum among values extracted from a set of entries in a Map.
    00029 * This aggregator is most commonly used with objects that implement
    00030 * <tt>Comparable</tt> such as <tt>String<tt/>; a <tt>Comparator</tt> can also
    00031 * be supplied to perform the comparisons.
    00032 *
    00033 * @author djl/pp  2008.05.09
    00034 */
    00035 class COH_EXPORT ComparableMin
    00036     : public class_spec<ComparableMin,
    00037         extends<AbstractComparableAggregator> >
    00038     {
    00039     friend class factory<ComparableMin>;
    00040
    00041     // ----- constructors ---------------------------------------------------
    00042
    00043     protected:
    00044         /**
    00045         * Default constructor (necessary for the PortableObject interface).
    00046         */
    00047         ComparableMin();
    00048
    00049         /**
    00050         * Construct a ComparableMin aggregator.
    00051         *
    00052         * @param vExtractor  the extractor that provides an object to be compared
    00053         * @param vComparator the comparator used to compare the extracted
    00054         *                    object, if NULL then the extracted object must
    00055         *                    implement Comparable
    00056         */
    00057         ComparableMin(ValueExtractor::View vExtractor,
    00058                 Comparator::View vComparator = NULL);
    00059
    00060
    00061     // ----- AbstractAggregator Interface  ----------------------------------
    00062
    00063     protected:
    00064         /**
    00065         * {@inheritDoc}
    00066         */
    00067         virtual void process(Object::View v, bool fFinal);
    00068     };
    00069
    00070 COH_CLOSE_NAMESPACE3
    00071
    00072 #endif // COH_COMPARABLE_MIN_HPP

Copyright © 2000, 2010, Oracle and/or its affiliates. All rights reserved.