00001 /* 00002 * Copyright 1999-2004 The Apache Software Foundation. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 #if !defined(XPATHCONSTRUCTIONCONTEXT_HEADER_GUARD_1357924680) 00017 #define XPATHCONSTRUCTIONCONTEXT_HEADER_GUARD_1357924680 00018 00019 00020 00021 // Base include file. Must be first. 00022 #include <xalanc/XPath/XPathDefinitions.hpp> 00023 00024 00025 00026 #include <xalanc/XalanDOM/XalanDOMString.hpp> 00027 00028 00029 00030 XALAN_DECLARE_XERCES_CLASS(Locator) 00031 00032 00033 00034 XALAN_CPP_NAMESPACE_BEGIN 00035 00036 00037 00038 typedef XERCES_CPP_NAMESPACE_QUALIFIER Locator LocatorType; 00039 00040 00041 00042 class XalanNode; 00043 00044 00045 00046 // 00050 // An abstract class which provides support for constructing the internal 00051 // representation of a stylesheet. 00052 // 00053 class XALAN_XPATH_EXPORT XPathConstructionContext 00054 { 00055 public: 00056 00057 XPathConstructionContext(MemoryManagerType& theManager); 00058 00059 virtual 00060 ~XPathConstructionContext(); 00061 00062 00067 virtual void 00068 reset() = 0; 00069 00079 virtual const XalanDOMString& 00080 getPooledString(const XalanDOMString& theString) = 0; 00081 00092 virtual const XalanDOMString& 00093 getPooledString( 00094 const XalanDOMChar* theString, 00095 XalanDOMString::size_type theLength = XalanDOMString::npos) = 0; 00096 00102 virtual XalanDOMString& 00103 getCachedString() = 0; 00104 00112 virtual bool 00113 releaseCachedString(XalanDOMString& theString) = 0; 00114 00115 class GetAndReleaseCachedString 00116 { 00117 public: 00118 00119 GetAndReleaseCachedString(XPathConstructionContext& theConstructionContext) : 00120 m_constructionContext(&theConstructionContext), 00121 m_string(&theConstructionContext.getCachedString()) 00122 { 00123 } 00124 00125 // Note non-const copy semantics... 00126 GetAndReleaseCachedString(GetAndReleaseCachedString& theSource) : 00127 m_constructionContext(theSource.m_constructionContext), 00128 m_string(theSource.m_string) 00129 { 00130 theSource.m_string = 0; 00131 } 00132 00133 ~GetAndReleaseCachedString() 00134 { 00135 if (m_string != 0) 00136 { 00137 m_constructionContext->releaseCachedString(*m_string); 00138 } 00139 } 00140 00141 XalanDOMString& 00142 get() const 00143 { 00144 assert(m_string != 0); 00145 00146 return *m_string; 00147 } 00148 00149 XPathConstructionContext& 00150 getConstructionContext() const 00151 { 00152 return *m_constructionContext; 00153 } 00154 00155 00156 private: 00157 00158 // Not implemented... 00159 GetAndReleaseCachedString& 00160 operator=(const GetAndReleaseCachedString&); 00161 00162 00163 // Data members... 00164 XPathConstructionContext* m_constructionContext; 00165 00166 XalanDOMString* m_string; 00167 }; 00168 00169 MemoryManagerType& 00170 getMemoryManager() 00171 { 00172 return m_memoryManager; 00173 } 00174 00175 virtual void 00176 error( 00177 const XalanDOMString& msg, 00178 const XalanNode* sourceNode, 00179 const LocatorType* locator) const = 0; 00180 00181 virtual void 00182 warn( 00183 const XalanDOMString& msg, 00184 const XalanNode* sourceNode, 00185 const LocatorType* locator) const = 0; 00186 00187 MemoryManagerType& m_memoryManager; 00188 }; 00189 00190 00191 00192 XALAN_CPP_NAMESPACE_END 00193 00194 00195 00196 #endif // XPATHCONSTRUCTIONCONTEXT_HEADER_GUARD_1357924680
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