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(FUNCTIONNAMESPACEURI_HEADER_GUARD_1357924680) 00058 #define FUNCTIONNAMESPACEURI_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 // Base class header file... 00072 #include <XPath/Function.hpp> 00073 00074 00075 00076 #include <XPath/NodeRefListBase.hpp> 00077 #include <XPath/XObject.hpp> 00078 #include <XPath/XObjectFactory.hpp> 00079 #include <XPath/XPathExecutionContext.hpp> 00080 00081 00082 00086 // 00087 // These are all inline, even though 00088 // there are virtual functions, because we expect that they will only be 00089 // needed by the XPath class. 00090 class XALAN_XPATH_EXPORT FunctionNamespaceURI : public Function 00091 { 00092 public: 00093 00094 // These methods are inherited from Function ... 00095 00096 virtual XObject* 00097 execute( 00098 XPathExecutionContext& executionContext, 00099 XalanNode* context, 00100 int /* opPos */, 00101 const XObjectArgVectorType& args) 00102 { 00103 XalanDOMString theNamespace; 00104 00105 if (args.size() > 1) 00106 { 00107 executionContext.error("The namespace-uri() function takes zero arguments or one argument!", 00108 context); 00109 } 00110 else if (args.size() == 1) 00111 { 00112 theNamespace = getNamespaceFromNodeSet(*args[0], 00113 executionContext); 00114 } 00115 else if (context == 0) 00116 { 00117 executionContext.error("The namespace-uri() function requires a non-null context node!", 00118 context); 00119 } 00120 else 00121 { 00122 // The XPath standard says that if there are no arguments, 00123 // the argument defaults to a node set with the context node 00124 // as the only member. 00125 // So we have to create an XObject with the context node as 00126 // the only member. 00127 // We shroud the temporary getNamespaceFromNodeSet( in a 00128 // FactoryObjectAutoPointer because it can be deleted once 00129 // we're done. 00130 00131 // An XObject that contains the context node. 00132 XObjectGuard theXObject(executionContext.getXObjectFactory(), 00133 executionContext.createNodeSet(*context)); 00134 00135 00136 theNamespace = getNamespaceFromNodeSet(*theXObject.get(), 00137 executionContext); 00138 } 00139 00140 return executionContext.getXObjectFactory().createString(theNamespace); 00141 } 00142 00143 virtual Function* 00144 clone() const 00145 { 00146 return new FunctionNamespaceURI(*this); 00147 } 00148 00149 private: 00150 00151 static XalanDOMString 00152 getNamespaceFromNodeSet(const XObject& theXObject, 00153 XPathExecutionContext& theContext) 00154 { 00155 XalanDOMString theNamespace; 00156 00157 const NodeRefListBase& theList = theXObject.nodeset(); 00158 00159 if (theList.getLength() > 0) 00160 { 00161 theNamespace = theContext.getNamespaceOfNode(*theList.item(0)); 00162 } 00163 00164 return theNamespace; 00165 } 00166 00167 // Not implemented... 00168 FunctionNamespaceURI& 00169 operator=(const FunctionNamespaceURI&); 00170 00171 bool 00172 operator==(const FunctionNamespaceURI&) const; 00173 }; 00174 00175 00176 00177 #endif // FUNCTIONNAMESPACEURI_HEADER_GUARD_1357924680
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