00001 /* 00002 * Versionable.hpp 00003 * 00004 * Copyright (c) 2000, 2017, 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_VERSIONABLE_HPP 00017 #define COH_VERSIONABLE_HPP 00018 00019 #include "coherence/lang.ns" 00020 00021 COH_OPEN_NAMESPACE2(coherence,util) 00022 00023 00024 /** 00025 * An interface for versionable data. 00026 * 00027 * @author tb 2008.05.08 00028 */ 00029 class COH_EXPORT Versionable 00030 : public interface_spec<Versionable> 00031 { 00032 // ----- Versionable interface ------------------------------------------ 00033 00034 public: 00035 /** 00036 * Get the version indicator for this object. The version indicator 00037 * should be an immutable object or one treated as an immutable, which 00038 * is to say that after the version is incremented, the previous version's 00039 * indicator reference will never be returned again. 00040 * 00041 * @return a non-null version value that implements the Comparable 00042 * interface 00043 */ 00044 virtual Comparable::View getVersionIndicator() const = 0; 00045 00046 /** 00047 * Update the version to the next logical version indicator. 00048 * 00049 * @throws UnsupportedOperationException if the object is immutable or 00050 * if the object does not know how to increment its own version 00051 * indicator 00052 */ 00053 virtual void incrementVersion() = 0; 00054 }; 00055 00056 COH_CLOSE_NAMESPACE2 00057 00058 #endif // COH_VERSIONABLE_HPP 00059