00001 /* 00002 * The Apache Software License, Version 1.1 00003 * 00004 * 00005 * Copyright (c) 1999 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(FUNCTIONLANG_HEADER_GUARD_1357924680) 00058 #define FUNCTIONLANG_HEADER_GUARD_1357924680 00059 00060 00061 00062 // Base header file. Must be first. 00063 #include <XPath/XPathDefinitions.hpp> 00064 00065 00066 00067 #include <vector> 00068 00069 00070 00071 #include <XalanDOM/XalanElement.hpp> 00072 #include <XalanDOM/XalanNode.hpp> 00073 00074 00075 00076 #include <PlatformSupport/DOMStringHelper.hpp> 00077 #include <PlatformSupport/XalanUnicode.hpp> 00078 00079 00080 00081 // Base class header file... 00082 #include <XPath/Function.hpp> 00083 00084 00085 00086 #include <XPath/XObject.hpp> 00087 #include <XPath/XObjectFactory.hpp> 00088 #include <XPath/XPathExecutionContext.hpp> 00089 00090 00091 00095 // 00096 // These are all inline, even though 00097 // there are virtual functions, because we expect that they will only be 00098 // needed by the XPath class. 00099 class XALAN_XPATH_EXPORT FunctionLang : public Function 00100 { 00101 public: 00102 00103 // These methods are inherited from Function ... 00104 00105 virtual XObject* 00106 execute( 00107 XPathExecutionContext& executionContext, 00108 XalanNode* context, 00109 int /* opPos */, 00110 const XObjectArgVectorType& args) 00111 { 00112 if (args.size() != 1) 00113 { 00114 executionContext.error("The lang() function takes one argument!", 00115 context); 00116 } 00117 00118 const XalanNode* parent = context; 00119 00120 bool fMatch = false; 00121 00122 const XalanDOMString& lang = args[0]->str(); 00123 00124 while(0 != parent) 00125 { 00126 if(XalanNode::ELEMENT_NODE == parent->getNodeType()) 00127 { 00128 const XalanElement* const theElementNode = 00129 #if defined(XALAN_OLD_STYLE_CASTS) 00130 (const XalanElement*)parent; 00131 #else 00132 static_cast<const XalanElement*>(parent); 00133 #endif 00134 00135 const XalanDOMString langVal = 00136 theElementNode->getAttribute(XALAN_STATIC_UCODE_STRING("xml:lang")); 00137 00138 if(0 != length(langVal)) 00139 { 00140 if(startsWith(toLowerCase(langVal), toLowerCase(lang))) 00141 { 00142 const unsigned int valLen = length(lang); 00143 00144 if(length(langVal) == valLen || 00145 charAt(langVal, valLen) == XalanUnicode::charHyphenMinus) 00146 { 00147 fMatch = true; 00148 00149 break; 00150 } 00151 } 00152 } 00153 } 00154 00155 parent = executionContext.getParentOfNode(*parent); 00156 } 00157 00158 return executionContext.getXObjectFactory().createBoolean(fMatch); 00159 } 00160 00161 #if defined(XALAN_NO_COVARIANT_RETURN_TYPE) 00162 virtual Function* 00163 #else 00164 virtual FunctionLang* 00165 #endif 00166 clone() const 00167 { 00168 return new FunctionLang(*this); 00169 } 00170 00171 private: 00172 00173 // Not implemented... 00174 FunctionLang& 00175 operator=(const FunctionLang&); 00176 00177 bool 00178 operator==(const FunctionLang&) const; 00179 }; 00180 00181 00182 00183 #endif // FUNCTIONLANG_HEADER_GUARD_1357924680
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