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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef _xmlbuilder_h_
     29 #define _xmlbuilder_h_
     30 
     31 #include <string>
     32 #include <vector>
     33 #include "talk/base/scoped_ptr.h"
     34 #include "talk/xmllite/xmlparser.h"
     35 
     36 #ifdef EXPAT_RELATIVE_PATH
     37 #include "lib/expat.h"
     38 #else
     39 #include "third_party/expat/v2_0_1/Source/lib/expat.h"
     40 #endif  // EXPAT_RELATIVE_PATH
     41 
     42 namespace buzz {
     43 
     44 class XmlElement;
     45 class XmlParseContext;
     46 
     47 
     48 class XmlBuilder : public XmlParseHandler {
     49 public:
     50   XmlBuilder();
     51 
     52   static XmlElement * BuildElement(XmlParseContext * pctx,
     53                                   const char * name, const char ** atts);
     54   virtual void StartElement(XmlParseContext * pctx,
     55                             const char * name, const char ** atts);
     56   virtual void EndElement(XmlParseContext * pctx, const char * name);
     57   virtual void CharacterData(XmlParseContext * pctx,
     58                              const char * text, int len);
     59   virtual void Error(XmlParseContext * pctx, XML_Error);
     60   virtual ~XmlBuilder();
     61 
     62   void Reset();
     63 
     64   // Take ownership of the built element; second call returns NULL
     65   XmlElement * CreateElement();
     66 
     67   // Peek at the built element without taking ownership
     68   XmlElement * BuiltElement();
     69 
     70 private:
     71   XmlElement * pelCurrent_;
     72   talk_base::scoped_ptr<XmlElement> pelRoot_;
     73   talk_base::scoped_ptr<std::vector<XmlElement*> > pvParents_;
     74 };
     75 
     76 }
     77 
     78 #endif
     79