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

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# coherence/util/extractor/IdentityExtractor.hpp

    00001 /*
    00002 * IdentityExtractor.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_IDENTITY_EXTRACTOR_HPP
    00017 #define COH_IDENTITY_EXTRACTOR_HPP
    00018
    00019 #include "coherence/lang.ns"
    00020
    00021 #include "coherence/io/pof/PofReader.hpp"
    00022 #include "coherence/io/pof/PofWriter.hpp"
    00023 #include "coherence/util/extractor/AbstractExtractor.hpp"
    00024
    00025 COH_OPEN_NAMESPACE3(coherence,util,extractor)
    00026
    00027 using coherence::io::pof::PofReader;
    00028 using coherence::io::pof::PofWriter;
    00029
    00030
    00031 /**
    00032 * Trivial ValueExtractor implementation that does not actually extract
    00033 * anything from the passed value, but returns the value itself.
    00034 *
    00035 * @author djl  2008.03.05
    00036 */
    00037 class COH_EXPORT IdentityExtractor
    00038     : public class_spec<IdentityExtractor,
    00039         extends<AbstractExtractor> >
    00040     {
    00041     friend class factory<IdentityExtractor>;
    00042
    00043     // ----- constructors ---------------------------------------------------
    00044
    00045     protected:
    00046         /**
    00047         * Create and return a Handle to a new Object instance.
    00048         */
    00049         IdentityExtractor();
    00050
    00051
    00052     // ----- ValueExtractor interface ---------------------------------------
    00053
    00054     public:
    00055         /**
    00056         * {@inheritDoc}
    00057         */
    00058         virtual Object::Holder extract(Object::Holder ohTarget) const;
    00059
    00060
    00061     // ----- PortableObject interface ---------------------------------------
    00062
    00063     public:
    00064         /**
    00065         * {@inheritDoc}
    00066         */
    00067         virtual void readExternal(PofReader::Handle hIn);
    00068
    00069         /**
    00070         * {@inheritDoc}
    00071         */
    00072         virtual void writeExternal(PofWriter::Handle hOut) const;
    00073
    00074
    00075     // ----- Object interface -----------------------------------------------
    00076
    00077     public:
    00078         /**
    00079         * {@inheritDoc}
    00080         */
    00081         virtual bool equals(Object::View v) const;
    00082
    00083         /**
    00084         * {@inheritDoc}
    00085         */
    00086         virtual size32_t hashCode() const;
    00087
    00088         /**
    00089         * {@inheritDoc}
    00090         */
    00091         virtual void toStream(std::ostream& out) const;
    00092
    00093
    00094     // ----- constants ------------------------------------------------------
    00095
    00096     public:
    00097         /**
    00098         * An instance of the IdentityExtractor.
    00099         */
    00100         static IdentityExtractor::Handle getInstance();
    00101     };
    00102
    00103 COH_CLOSE_NAMESPACE3
    00104
    00105 #endif // COH_IDENTITY_EXTRACTOR_HPP

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