src/wsdlparser/WsdlParser.h

00001 /* 
00002  * Wsdlpull - A C++ parser  for WSDL  (Web services description language)
00003  * Copyright (C) 2005-2007 Vivek Krishna
00004  *
00005  * This library is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU Library General Public
00007  * License as published by the Free Software Foundation; either
00008  * version 2 of the License, or (at your option) any later version.
00009  *
00010  * This library is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Library General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Library General Public
00016  * License along with this library; if not, write to the Free
00017  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00018  *
00019  */
00020 #ifndef _WSDLPARSERH
00021 #define _WSDLPARSERH
00022 
00023 #include "xmlpull/wsdlpull_export.h"
00024 #include "xmlpull/XmlPullParser.h"
00025 #include "xmlpull/XmlPullParserException.h"
00026 #include "schemaparser/SchemaParser.h"
00027 
00028 #include "wsdlparser/PortType.h"
00029 #include "wsdlparser/Message.h"
00030 #include "wsdlparser/Operation.h"
00031 #include "wsdlparser/Binding.h"
00032 #include "wsdlparser/Service.h"
00033 #include "wsdlparser/WsdlExtension.h"
00034 
00035 
00036 namespace WsdlPull{
00037 
00038   const std::string wsdlUri="http://schemas.xmlsoap.org/wsdl/";
00039 
00040 
00041 class Soap;
00042 //Wsdl pull parser
00043 class WSDLPULL_EXPORT WsdlParser
00044 {
00045  public:
00046   /** @name Constructors and Destructors */
00047   //@{
00048   /**
00049    * The default constructor for WsdlParser
00050    * @param input stream for the wsdl file
00051    * @param output stream for any error outputs
00052    * @param schemaPath path to directory containing XML schema files
00053    *
00054    */
00055   WsdlParser(std::istream & in = std::cin, std::ostream & out = std::cout,
00056              const std::string & schemaPath = "");
00057   WsdlParser(const std::string& Uri,std::ostream & out = std::cout,
00058              const std::string & schemaPath = "");
00059   ~WsdlParser();
00060   //@}
00061 
00062   /**
00063    * setSchemaPath
00064    * Set path to location of XML schema files, used by parser.
00065    */
00066   void setSchemaPath(const std::string & schemaPath);
00067 
00068     /** @name methods used for parsing */
00069   //@{
00070   /**
00071    * getNextElement processes the next Wsdl ELement in the stream and
00072    * returns the type of the root Wsdl element parsed.
00073    * @return  one of  START,DEFINITION,DOCUMENTATION,ANNOTATION,
00074    *            TYPES,MESSAGE,PORT_TYPE,BINDING,SERVICE,IMPORT
00075    */
00076   int getNextElement();
00077 
00078   /**
00079    * getEventType
00080    * returns the type Wsdl element parsed.
00081    * @return  one of the Wsdl event types
00082    */
00083   int getEventType();
00084 
00085   //@}
00086 
00087   /** @name Various Getter methods*/
00088   //@{
00089   //NOTE:The caller must *NOT* free the pointers returned by the getter apis
00090   //This is true for all apis except whenever the api returns a pointer to 
00091   //a list of elements which is not one  of the root wsdl elements ,
00092   //such as getOperations(port type) which is the only exception
00093   /**
00094    * getTargetNamespace
00095    * @return target namespace of the wsdl document
00096    */
00097   std::string getNamespace(void);
00098 
00099   /**
00100    * getName
00101    * @return name of the wsdl document
00102    */
00103   std::string getName();
00104 
00105   /**
00106    * getDocumentation Returns the documentation string for the WSDL file
00107    *                  This method must be called after <code>getEventType</code> returns DOCUMENT
00108    * @return documentation std::string .
00109    */
00110   const std::string*  getDocumentation();
00111 
00112   /**
00113    * getBinding .This method must be called after
00114    *  <code>getEventType</code> returns BINDING
00115    * @return reference to the Binding element just parsed.
00116    * @exception WsdlException
00117    */
00118   const Binding *getBinding();
00119 
00120   /**
00121    * getBinding .
00122    * @param Qname refering to the binding element
00123    * @return reference to the Binding element
00124    * @exception WsdlException
00125    */
00126   const Binding *getBinding(const Qname & q);
00127 
00128   /**
00129    * getBindings
00130    * @return iterator to a list of binding elements
00131    * @exception WsdlException
00132    */
00133   bool  getBindings(Binding::cBindingIterator & begin,
00134                     Binding::cBindingIterator & end)const;
00135 
00136   /**
00137    * getService .This method must be called after
00138    *  <code>getEventType</code> returns SERVICE
00139    * @return reference to the Binding element just parsed.
00140    * @exception WsdlException
00141    */
00142   const Service *getService();
00143 
00144   /**
00145    * getService.
00146    * @param Qname refering to the service element
00147    * @return reference to the Service element
00148    * @exception WsdlException
00149    */
00150     typedef std::list<Service*>::iterator ServiceIterator;
00151   const Service *getService(const Qname & q);
00152     void getServices(ServiceIterator &from, ServiceIterator &to);
00153 
00154   /**
00155    * getPortType .This method must be called after
00156    *  <code>getEventType</code> returns PORT_TYPE
00157    * @return reference to the port type element just parsed.
00158    * @exception WsdlException
00159    */
00160   const PortType *getPortType();
00161 
00162   /**
00163    * getPortType
00164    * @param Qname refering to the port type element
00165    * @return reference to the port type element
00166    * @exception WsdlException
00167    */
00168   const PortType *getPortType(const Qname & q);
00169 
00170   /**
00171    * getPortTypes
00172    * @return iterators to a container of port types
00173    * @exception WsdlException
00174    */
00175   bool getPortTypes(PortType::cPortTypeIterator& begin,
00176                     PortType::cPortTypeIterator& end)const;
00177 
00178   /**
00179    * getOperations
00180    * @param Qname refering to the port type element
00181    * @return true if the port type is found.
00182    returns the start and ending iterators to operations
00183    * @exception WsdlException
00184    */
00185   bool getOperations(const Qname & portType,
00186                      Operation::cOpIterator& begin,
00187                      Operation::cOpIterator& end);
00188 
00189   /**
00190    * getOperation
00191    * @param Qname refering to the port type element
00192    * @param Qname refering to the operation element
00193    * @return reference to the operation element
00194    * @exception WsdlException
00195    */
00196   const Operation *getOperation(const Qname & portType, 
00197                                 const Qname & q);
00198 
00199   /**
00200    * getMessage .This method must be called after
00201    *  <code>getEventType</code> returns MESSAGE
00202    * @return reference to the message element just parsed.
00203    * @exception WsdlException
00204    */
00205   const Message *getMessage();
00206 
00207   /**
00208    * getMessage .
00209    * @param Qname of the message element
00210    * @return reference to the message element
00211    * @exception WsdlException
00212    */
00213   const Message *getMessage(const Qname & q);
00214 
00215   /**
00216    * getMessages
00217    * @return list of all messages  parsed.
00218    * @exception WsdlException
00219    */
00220   std::list < const Message *>& getMessages();
00221 
00222   /**
00223    * getSchemaParsers
00224    * @return iterators to list of schema parsers 
00225    *         the first element is the start of the list
00226    *         second being the end of it
00227    * @exception WsdlException
00228    */
00229 
00230   void getSchemaParsers(std::vector<SchemaParser* >::iterator & from,
00231                         std::vector<SchemaParser* >::iterator & to) ;
00232   
00233   /**
00234    * getNumSchemas
00235    * @return number of schemas in the wsdl document
00236    * @exception WsdlException
00237    */
00238   int getNumSchemas() const;
00239 
00240   /**
00241    * getSchemaParser
00242    * @param target namespace of the schema
00243    * @return pointer to the schema parser for the namespace
00244    * @exception WsdlException
00245    */
00246   const SchemaParser *getSchemaParser(std::string targetNamespace) const;
00247 
00248 
00249   /**
00250    * to query the status of wsdl parsing
00251    */
00252   bool status()const;
00253   std::string wsdlPath()const;
00254   std::ostream & logger();
00255     std::string &getWsdlFileName() 
00256     {
00257       return wsdlFileName;
00258     }
00259   //@}
00260 
00261   
00262   /** @name Extensibility handler methods*/
00263   //@{
00264   /**
00265    * addExtensibilityHandler Registers an extensibility handler
00266    *                         for Wsdl extensibility namespaces
00267    * @param pointer to the instance of WsdlExtension
00268    * @exception WsdlException
00269    */
00270   void addExtensibilityHandler(WsdlExtension * ext);
00271   /**
00272    * getExtensibilityHandler returns theextensibility handler
00273    *                         for the namespaces
00274    * @param namespace
00275    * @exception WsdlException
00276    */
00277   WsdlExtension *  getExtensibilityHandler(const std::string & ns);
00278    //return the extensibility handler for the given id.
00279    //WsdlParser only stores ids for the extensibilit elements.
00280   WsdlExtension * getExtensibilityHandler(int extId);
00281   //@}
00282 
00283  
00284   /** @name Miscellaneous methods*/
00285   //@{
00286   /**
00287    * setFeature enables one of the features of the parser
00288    * @return   true or false 
00289    */
00290   bool setFeature (int feature_id);
00291   //@}
00292 
00293 
00294   /**
00295    *The various states of the Wsdl Parser
00296    */
00297   enum
00298     {
00299       NONE ,
00300       START,
00301       DEFINITION,
00302       DOCUMENTATION,
00303       ANNOTATION,
00304       IMPORT,
00305       SCHEMA,
00306       TYPES,
00307       MESSAGE,
00308       PART,
00309       PORT_TYPE,
00310       OPERATION,
00311       INPUT,
00312       OUTPUT,
00313       FAULT,
00314       BINDING,
00315       EXTENSIBILITY,
00316       SERVICE,
00317       PORT,
00318       END
00319     };
00320 
00321 #ifdef LOGGING
00322   //for debugging
00323   void print(std::ostream & out);
00324 #endif
00325 
00326   //{@ Deprecated
00327   /**
00328    * getSchemaParser
00329    * @param index of the schema parser .index:0..getNumSchemas-1
00330    * @return pointer to the schema parser for the namespace
00331    * @exception WsdlException
00332    */
00333   const SchemaParser *getSchemaParser(int schemaId) const;
00334   //@}
00335 
00336  private:
00337   /* 
00338    *  private methods for parsing
00339    */
00340   int peek(bool lookahead = true);
00341   int next();
00342   void error(std::string s,int level=0);
00343   std::string getNamespace(std::string prefix);
00344   Element * getElement(const Qname &);
00345   int getTypeId(const Qname &);
00346     int getSchema(const Qname & name,bool type = true);
00347   std::string* parseDoc();
00348   void parseDefinitions();
00349   void parseMessage();
00350   void parseAnnotation();
00351   void parseImport();
00352   PortType *parsePortType();
00353   Operation *parseOperation(PortType* p);
00354   void parseTypes();
00355   void parseBinding();
00356   void parseService();
00357   int handleExtensibilityAttributes(std::string prefix, std::string name);
00358   int handleExtensibilityElement(int);
00359   void putMessage(Message * m);
00360   void putPortType(PortType * pt);
00361   void putBinding(Binding * bn);
00362   void initialize(bool);
00363   bool errorOccured_;
00364   XmlPullParser* openSchemaFile(const std::string& path);
00365   const Message *pgetMessage(const Qname& q);
00366   std::string name_, tnsPrefix_, tnsUri_;
00367   std::vector<SchemaParser*> schemaParser_;
00368 
00369   typedef struct
00370   {
00371     WsdlExtension *we;
00372     SchemaParser *spe;
00373   } ExtensionInfo;
00374   std::list < const Message *> messages_;
00375   std::vector<ExtensionInfo> wsdlExtensions_;
00376   std::list < PortType *>porttypes_;
00377   std::list < Binding *>bindings_;
00378   std::list < Service*> services_;
00379 
00380   class Imports
00381   {
00382   public:
00383     Imports(std::string,std::string);
00384     std::string ns, loc;
00385   };
00386   std::vector<Imports> imports_;
00387   std::list < std::string *> docs_list_;
00388   std::ostream & ostr;
00389   std::istream & istr;
00390   int state_;
00391   int element_;                            //the last Wsdl element parsed
00392   std::string* Doc_;
00393   XmlPullParser * xParser_;
00394   std::ifstream xmlStream;
00395   std::string wsdlFileName;
00396   Soap * soap_;
00397   const int MAX_EXT_XML;
00398   std::string schemaPath_; // Path to schemas, used by parser during parsing.
00399   std::string uri_; //The uri to use to resolve imports.1 level up the location of the wsdl file
00400 };
00401 
00402 
00403 inline
00404 WsdlParser::Imports::Imports(std::string nameSpace,std::string location)
00405   :ns(nameSpace),
00406      loc(location)
00407 {
00408 }
00409 
00410 
00411 inline
00412 std::string
00413 WsdlParser::getNamespace(std::string prefix)
00414 {
00415   return xParser_->getNamespace(prefix);
00416 }
00417 
00418 
00419 //public  APIs
00420 inline
00421 int  
00422 WsdlParser::getNextElement()
00423 {
00424   next();
00425   return element_;
00426 }
00427 
00428 inline
00429 const std::string*
00430 WsdlParser::getDocumentation() 
00431 {
00432   return  (const std::string*) Doc_;
00433 }
00434 
00435 inline
00436 std::string
00437 WsdlParser::getNamespace(void)
00438 {
00439   return tnsUri_;
00440 }
00441 
00442 inline
00443 std::string
00444 WsdlParser::getName()
00445 {
00446   return name_;
00447 }
00448 
00449 
00450 
00451 inline
00452 int
00453 WsdlParser::getEventType()
00454 {
00455   return element_;
00456 }
00457 
00458 
00459 inline
00460 std::list < const Message *>&
00461 WsdlParser::getMessages()
00462 {
00463   return messages_;
00464 }
00465 
00466 //This is deprecated
00467 //the ids 0 and 1 are return the schema parsers used to internally parse the soap schema.
00468 //Ideally you should use getSchemaParser(std::string).If you want to iterate over all the schema parsers
00469 //use getSchemaParsers
00470 inline
00471 const SchemaParser *
00472 WsdlParser::getSchemaParser(int schemaId) const
00473 {
00474   return (const SchemaParser *) schemaParser_[schemaId];
00475 }
00476 
00477 inline
00478 std::string
00479 WsdlParser::wsdlPath()const
00480 {
00481   return wsdlFileName           ;
00482 }
00483 inline
00484 bool
00485 WsdlParser::status()const
00486 {
00487  return !errorOccured_;
00488 }
00489 
00490 inline
00491 std::ostream&
00492 WsdlParser::logger()
00493 {
00494   return ostr;
00495 }
00496 }
00497 /*  */
00498 #endif                                            /*  */

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