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

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# coherence/util/filter/GreaterFilter.hpp

    00001 /*
    00002 * GreaterFilter.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_GREATER_FILTER_HPP
    00017 #define COH_GREATER_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 * "Greater" 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  2008.03.06
    00036 */
    00037 class COH_EXPORT GreaterFilter
    00038     : public class_spec<GreaterFilter,
    00039         extends<ComparisonFilter>,
    00040         implements<IndexAwareFilter> >
    00041     {
    00042     friend class factory<GreaterFilter>;
    00043
    00044     // ----- constructors ---------------------------------------------------
    00045
    00046     protected:
    00047         /**
    00048         * Default constructor (necessary for the PortableObject interface).
    00049         */
    00050         GreaterFilter();
    00051
    00052         /**
    00053         * Construct a GreaterFilter for testing "Greater" condition.
    00054         *
    00055         * @param vValueExtractor the ValueExtractor to use by this filter
    00056         * @param vComparable     the object to compare the result with
    00057         */
    00058         GreaterFilter(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_GREATER_FILTER_HPP

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