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(FUNCTIONSTRINGLENGTH_HEADER_GUARD_1357924680) 00058 #define FUNCTIONSTRINGLENGTH_HEADER_GUARD_1357924680 00059 00060 00061 00062 // Base header file. Must be first. 00063 #include <XPath/XPathDefinitions.hpp> 00064 00065 00066 00067 #include <PlatformSupport/DOMStringHelper.hpp> 00068 00069 00070 00071 // Base class header file... 00072 #include <XPath/FunctionDefaultStringArgument.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 FunctionStringLength : public FunctionDefaultStringArgument 00091 { 00092 public: 00093 00094 // These methods are inherited from FunctionDefaultStringArgument ... 00095 00096 virtual XObject* 00097 execute( 00098 XPathExecutionContext& executionContext, 00099 XalanNode* context, 00100 int /* opPos */, 00101 const XObjectArgVectorType& args) 00102 { 00103 const XObjectArgVectorType::size_type theSize = args.size(); 00104 00105 unsigned int theLength = 0; 00106 00107 if(theSize == 0) 00108 { 00109 if (context == 0) 00110 { 00111 executionContext.error("The string-length() function requires a non-null context node!", 00112 context); 00113 } 00114 else 00115 { 00116 theLength = length(getDefaultStringArgument(executionContext, 00117 *context)); 00118 } 00119 } 00120 else if (theSize == 1) 00121 { 00122 theLength = length(args[0]->str()); 00123 } 00124 else 00125 { 00126 executionContext.error("The string-length() function takes either zero arguments or one argument!", 00127 context); 00128 } 00129 00130 return executionContext.getXObjectFactory().createNumber(theLength); 00131 } 00132 00133 #if defined(XALAN_NO_COVARIANT_RETURN_TYPE) 00134 virtual Function* 00135 #else 00136 virtual FunctionStringLength* 00137 #endif 00138 clone() const 00139 { 00140 return new FunctionStringLength(*this); 00141 } 00142 00143 private: 00144 00145 // Not implemented... 00146 FunctionStringLength& 00147 operator=(const FunctionStringLength&); 00148 00149 bool 00150 operator==(const FunctionStringLength&) const; 00151 }; 00152 00153 00154 00155 #endif // FUNCTIONSTRINGLENGTH_HEADER_GUARD_1357924680
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