00001 /* 00002 * The Apache Software License, Version 1.1 00003 * 00004 * 00005 * Copyright (c) 2000 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(XALAN_VARIABLESSTACK_HEADER_GUARD) 00058 #define XALAN_VARIABLESSTACK_HEADER_GUARD 00059 00060 00061 00062 // Base include file. Must be first. 00063 #include <XSLT/XSLTDefinitions.hpp> 00064 00065 00066 00067 #include <cassert> 00068 #include <vector> 00069 00070 00071 00072 #include <XPath/XalanQName.hpp> 00073 #include <XPath/XObject.hpp> 00074 00075 00076 00077 #include <XSLT/XSLTProcessorException.hpp> 00078 00079 00080 00081 class Arg; 00082 class ElemTemplateElement; 00083 class ElemVariable; 00084 class StylesheetExecutionContext; 00085 class XalanNode; 00086 00087 00088 00092 class XALAN_XSLT_EXPORT VariablesStack 00093 { 00094 public: 00095 00099 explicit 00100 VariablesStack(); 00101 00102 ~VariablesStack(); 00103 00104 00108 void 00109 reset(); 00110 00116 void 00117 pushElementFrame(const ElemTemplateElement* elem); 00118 00124 void 00125 popElementFrame(const ElemTemplateElement* elem); 00126 00134 void 00135 pushContextMarker(); 00136 00140 void 00141 popContextMarker(); 00142 00143 struct ParamsVectorEntry 00144 { 00145 ParamsVectorEntry() : 00146 m_qname(0), 00147 m_value(), 00148 m_variable(0) 00149 { 00150 } 00151 00152 ParamsVectorEntry( 00153 const XalanQName* qname, 00154 const XObjectPtr value) : 00155 m_qname(qname), 00156 m_value(value), 00157 m_variable(0) 00158 { 00159 } 00160 00161 ParamsVectorEntry( 00162 const XalanQName* qname, 00163 const ElemVariable* variable) : 00164 m_qname(qname), 00165 m_value(), 00166 m_variable(variable) 00167 { 00168 } 00169 00170 const XalanQName* m_qname; 00171 00172 XObjectPtr m_value; 00173 00174 const ElemVariable* m_variable; 00175 }; 00176 00177 #if defined(XALAN_NO_NAMESPACES) 00178 typedef vector<ParamsVectorEntry> ParamsVectorType; 00179 #else 00180 typedef std::vector<ParamsVectorEntry> ParamsVectorType; 00181 #endif 00182 00190 void 00191 pushParams( 00192 const ParamsVectorType& theParams, 00193 const ElemTemplateElement* targetTemplate); 00194 00205 const XObjectPtr 00206 getParamVariable( 00207 const XalanQName& qname, 00208 StylesheetExecutionContext& executionContext, 00209 bool& fNameFound) 00210 { 00211 return findXObject(qname, executionContext, true, false, fNameFound); 00212 } 00213 00225 const XObjectPtr 00226 getVariable( 00227 const XalanQName& qname, 00228 StylesheetExecutionContext& executionContext, 00229 bool& fNameFound) 00230 { 00231 return findXObject(qname, executionContext, false, true, fNameFound); 00232 } 00233 00243 void 00244 pushVariable( 00245 const XalanQName& name, 00246 const ElemVariable* var, 00247 const ElemTemplateElement* e); 00248 00258 void 00259 pushVariable( 00260 const XalanQName& name, 00261 const XObjectPtr& val, 00262 const ElemTemplateElement* e); 00263 00267 void 00268 start(); 00269 00273 void 00274 resetParams(); 00275 00279 void 00280 markGlobalStackFrame(); 00281 00285 void 00286 unmarkGlobalStackFrame(); 00287 00295 void 00296 setCurrentStackFrameIndex(int currentStackFrameIndex = -1) 00297 { 00298 if (currentStackFrameIndex == -1) 00299 m_currentStackFrameIndex = m_stack.size(); 00300 else 00301 m_currentStackFrameIndex = currentStackFrameIndex; 00302 } 00303 00310 int 00311 getCurrentStackFrameIndex() const 00312 { 00313 return m_currentStackFrameIndex; 00314 } 00315 00321 int 00322 getGlobalStackFrameIndex() const 00323 { 00324 return m_globalStackFrameIndex; 00325 } 00326 00327 class InvalidStackContextException : public XSLTProcessorException 00328 { 00329 public: 00330 00331 InvalidStackContextException(); 00332 00333 virtual 00334 ~InvalidStackContextException(); 00335 00336 private: 00337 00338 }; 00339 00340 class PushParamFunctor 00341 { 00342 public: 00343 00344 PushParamFunctor(VariablesStack& theVariablesStack) : 00345 m_variablesStack(theVariablesStack) 00346 { 00347 } 00348 00349 const void 00350 operator()(const ParamsVectorType::value_type& theEntry); 00351 00352 private: 00353 00354 VariablesStack& m_variablesStack; 00355 }; 00356 00357 private: 00358 00359 class StackEntry; 00360 00368 bool 00369 elementFrameAlreadyPushed(const ElemTemplateElement* elem) const; 00370 00376 void 00377 push(const StackEntry& theEntry); 00378 00382 void 00383 pop(); 00384 00390 const StackEntry& 00391 back() const 00392 { 00393 assert(m_stack.empty() == false); 00394 00395 return m_stack.back(); 00396 } 00397 00398 friend class CommitPushElementFrame; 00399 friend class EnsurePop; 00400 friend class PushParamFunctor; 00401 friend class SetAndRestoreForceGlobalSearch; 00402 00403 class XALAN_XSLT_EXPORT StackEntry 00404 { 00405 public: 00406 00411 enum eType { eContextMarker, 00412 eVariable, 00413 eParam, 00414 eActiveParam, 00415 eElementFrameMarker, 00416 eNextValue }; 00417 00421 explicit 00422 StackEntry(); 00423 00427 StackEntry( 00428 const XalanQName* name, 00429 const XObjectPtr& val, 00430 bool isParam = false); 00431 00435 StackEntry( 00436 const XalanQName* name, 00437 const ElemVariable* var, 00438 bool isParam = false); 00439 00443 StackEntry(const ElemTemplateElement* elem); 00444 00445 00449 StackEntry(const StackEntry& theSource); 00450 00454 ~StackEntry(); 00455 00461 eType 00462 getType() const 00463 { 00464 return m_type; 00465 } 00466 00472 const XalanQName* 00473 getName() const 00474 { 00475 return m_qname; 00476 } 00477 00483 const XObjectPtr& 00484 getValue() const 00485 { 00486 return m_value; 00487 } 00488 00494 void 00495 setValue(const XObjectPtr& theValue) 00496 { 00497 m_value = theValue; 00498 } 00499 00505 const ElemVariable* 00506 getVariable() const 00507 { 00508 return m_variable; 00509 } 00510 00511 void 00512 activate(); 00513 00514 void 00515 deactivate(); 00516 00522 const ElemTemplateElement* 00523 getElement() const 00524 { 00525 return m_element; 00526 } 00527 00528 StackEntry& 00529 operator=(const StackEntry& theRHS); 00530 00531 bool 00532 operator==(const StackEntry& theRHS) const; 00533 00534 private: 00535 00536 // Data members... 00537 eType m_type; 00538 00539 const XalanQName* m_qname; 00540 00541 XObjectPtr m_value; 00542 00543 const ElemVariable* m_variable; 00544 00545 const ElemTemplateElement* m_element; 00546 }; 00547 00548 #if defined(XALAN_NO_NAMESPACES) 00549 typedef vector<StackEntry> VariableStackStackType; 00550 #else 00551 typedef std::vector<StackEntry> VariableStackStackType; 00552 #endif 00553 00554 enum { eDefaultStackSize = 100 }; 00555 00556 00557 const XObjectPtr 00558 findXObject( 00559 const XalanQName& name, 00560 StylesheetExecutionContext& executionContext, 00561 bool fIsParam, 00562 bool fSearchGlobalSpace, 00563 bool& fNameFound); 00564 00565 StackEntry* 00566 findEntry( 00567 const XalanQName& name, 00568 bool fIsParam, 00569 bool fSearchGlobalSpace); 00570 00571 00572 VariableStackStackType m_stack; 00573 00574 int m_globalStackFrameIndex; 00575 00576 bool m_globalStackFrameMarked; 00577 00583 unsigned int m_currentStackFrameIndex; 00584 }; 00585 00586 00587 00588 #endif // #if !defined(XALAN_VARIABLESSTACK_HEADER_GUARD)
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