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(FUNCTIONTRANSLATE_HEADER_GUARD_1357924680) 00058 #define FUNCTIONTRANSLATE_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 <PlatformSupport/DOMStringHelper.hpp> 00072 00073 00074 00075 // Base class header file... 00076 #include <XPath/Function.hpp> 00077 00078 00079 00080 #include <XPath/XObject.hpp> 00081 #include <XPath/XObjectFactory.hpp> 00082 #include <XPath/XPathExecutionContext.hpp> 00083 00084 00085 00089 // 00090 // These are all inline, even though 00091 // there are virtual functions, because we expect that they will only be 00092 // needed by the XPath class. 00093 class XALAN_XPATH_EXPORT FunctionTranslate : public Function 00094 { 00095 public: 00096 00097 // These methods are inherited from Function ... 00098 00099 virtual XObject* 00100 execute( 00101 XPathExecutionContext& executionContext, 00102 XalanNode* context, 00103 int /* opPos */, 00104 const XObjectArgVectorType& args) 00105 { 00106 if (args.size() != 3) 00107 { 00108 executionContext.error("The translate() function takes three arguments!", 00109 context); 00110 } 00111 00112 const XalanDOMString& theFirstString = args[0]->str(); 00113 const XalanDOMString& theSecondString = args[1]->str(); 00114 const XalanDOMString& theThirdString = args[2]->str(); 00115 00116 const unsigned int theFirstStringLength = length(theFirstString); 00117 const unsigned int theSecondStringLength = length(theSecondString); 00118 const unsigned int theThirdStringLength = length(theThirdString); 00119 00120 #if !defined(XALAN_NO_NAMESPACES) 00121 using std::vector; 00122 #endif 00123 00124 // A vector to contain the new characters. We'll use it to construct 00125 // the result string. 00126 vector<XalanDOMChar> theBuffer; 00127 00128 // The result string can only be as large as the first string, so 00129 // just reserve the space now. Also reserve space for the 00130 // terminating 0. 00131 theBuffer.reserve(theFirstStringLength + 1); 00132 00133 for (unsigned int i = 0; i < theFirstStringLength; i++) 00134 { 00135 const XalanDOMChar theCurrentChar = charAt(theFirstString, i); 00136 00137 const unsigned int theIndex = indexOf(theSecondString, theCurrentChar); 00138 00139 if (theIndex >= theSecondStringLength) 00140 { 00141 // Didn't find the character in the second string, so it 00142 // is not translated. 00143 theBuffer.push_back(theCurrentChar); 00144 } 00145 else if (theIndex < theThirdStringLength) 00146 { 00147 // OK, there's a corresponding character in the 00148 // third string, so do the translation... 00149 theBuffer.push_back(charAt(theThirdString, theIndex)); 00150 } 00151 else 00152 { 00153 // There's no corresponding character in the 00154 // third string, since it's shorter than the 00155 // second string. In this case, the character 00156 // is removed from the output string, so don't 00157 // do anything. 00158 } 00159 } 00160 00161 return executionContext.getXObjectFactory().createString(XalanDOMString(theBuffer.begin(), theBuffer.size())); 00162 } 00163 00164 #if defined(XALAN_NO_COVARIANT_RETURN_TYPE) 00165 virtual Function* 00166 #else 00167 virtual FunctionTranslate* 00168 #endif 00169 clone() const 00170 { 00171 return new FunctionTranslate(*this); 00172 } 00173 00174 private: 00175 00176 // Not implemented... 00177 FunctionTranslate& 00178 operator=(const FunctionTranslate&); 00179 00180 bool 00181 operator==(const FunctionTranslate&) const; 00182 }; 00183 00184 00185 00186 #endif // FUNCTIONTRANSLATE_HEADER_GUARD_1357924680
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