00001 /* 00002 * The Apache Software License, Version 1.1 00003 * 00004 * 00005 * Copyright (c) 1999-2000 The Apache Software Foundation. All rights 00006 * reserved. 00007 * 00008 * Redistribution and use in source and binary forms, with or without 00009 * modification, are permitted provided that the following conditions 00010 * are met: 00011 * 00012 * 1. Redistributions of source code must retain the above copyright 00013 * notice, this list of conditions and the following disclaimer. 00014 * 00015 * 2. Redistributions in binary form must reproduce the above copyright 00016 * notice, this list of conditions and the following disclaimer in 00017 * the documentation and/or other materials provided with the 00018 * distribution. 00019 * 00020 * 3. The end-user documentation included with the redistribution, 00021 * if any, must include the following acknowledgment: 00022 * "This product includes software developed by the 00023 * Apache Software Foundation (http://www.apache.org/)." 00024 * Alternately, this acknowledgment may appear in the software itself, 00025 * if and wherever such third-party acknowledgments normally appear. 00026 * 00027 * 4. The names "Xalan" and "Apache Software Foundation" must 00028 * not be used to endorse or promote products derived from this 00029 * software without prior written permission. For written 00030 * permission, please contact apache@apache.org. 00031 * 00032 * 5. Products derived from this software may not be called "Apache", 00033 * nor may "Apache" appear in their name, without prior written 00034 * permission of the Apache Software Foundation. 00035 * 00036 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 00037 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00038 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00039 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 00040 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00041 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00042 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 00043 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 00044 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00045 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 00046 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00047 * SUCH DAMAGE. 00048 * ==================================================================== 00049 * 00050 * This software consists of voluntary contributions made by many 00051 * individuals on behalf of the Apache Software Foundation and was 00052 * originally based on software copyright (c) 1999, International 00053 * Business Machines, Inc., http://www.ibm.com. For more 00054 * information on the Apache Software Foundation, please see 00055 * <http://www.apache.org/>. 00056 */ 00057 #if !defined(XALAN_DOMSTRINGCACHE_HEADER_GUARD) 00058 #define XALAN_DOMSTRINGCACHE_HEADER_GUARD 00059 00060 00061 00062 // Base include file. Must be first. 00063 #include <PlatformSupport/PlatformSupportDefinitions.hpp> 00064 00065 00066 00067 #include <deque> 00068 #include <vector> 00069 00070 00071 00072 #include <XalanDOM/XalanDOMString.hpp> 00073 00074 00075 00076 class XALAN_PLATFORMSUPPORT_EXPORT XalanDOMStringCache 00077 { 00078 public: 00079 00080 enum { eDefaultMaximumSize = 100 }; 00081 00082 #if defined(XALAN_NO_NAMESPACES) 00083 typedef vector<XalanDOMString*> StringListType; 00084 #else 00085 typedef std::vector<XalanDOMString*> StringListType; 00086 #endif 00087 00088 explicit 00089 XalanDOMStringCache(unsigned int theMaximumSize = eDefaultMaximumSize); 00090 00091 ~XalanDOMStringCache(); 00092 00093 unsigned int 00094 getMaximumSize() const 00095 { 00096 return m_maximumSize; 00097 } 00098 00099 void 00100 setMaximumSize(unsigned int theSize) 00101 { 00102 m_maximumSize = theSize; 00103 } 00104 00105 XalanDOMString& 00106 get(); 00107 00108 bool 00109 release(XalanDOMString& theString); 00110 00111 /* 00112 * Clear all of the strings in the cache. This 00113 * destroys all of the strings. 00114 * 00115 */ 00116 void 00117 clear(); 00118 00119 /* 00120 * Reset the cache so that all strings that are 00121 * currently in use are available. 00122 */ 00123 void 00124 reset(); 00125 00126 class GetAndRelease 00127 { 00128 public: 00129 00130 GetAndRelease(XalanDOMStringCache& theCache) : 00131 m_cache(theCache), 00132 m_string(&theCache.get()) 00133 { 00134 } 00135 00136 ~GetAndRelease() 00137 { 00138 m_cache.release(*m_string); 00139 } 00140 00141 XalanDOMString& 00142 get() const 00143 { 00144 return *m_string; 00145 } 00146 00147 private: 00148 00149 XalanDOMStringCache& m_cache; 00150 00151 XalanDOMString* const m_string; 00152 }; 00153 00154 private: 00155 00156 // not implemented 00157 XalanDOMStringCache(const XalanDOMStringCache&); 00158 00159 bool 00160 operator==(const XalanDOMStringCache&) const; 00161 00162 XalanDOMStringCache& 00163 operator=(const XalanDOMStringCache&); 00164 00168 StringListType m_availableList; 00169 00173 StringListType m_busyList; 00174 00175 unsigned int m_maximumSize; 00176 }; 00177 00178 00179 00180 #endif // XALAN_RESULTNAMESPACESSTACK_HEADER_GUARD
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