use wxXmlResource as an XML parser ?

[baert]

Hi,
I just need a small xml parser in my app,

I saw the wxXmlDocument class, but the advice is not to use it.

I heard about the possibility to use wxXmlResource as an XML parser,
but In its functions, I can't find the things I need to extract nodes, attributes, etc...

Have you any hint or exemples using wxXmlResource or wxXmlDocument for parsing simple xml doc ?

Thanks for your help !

Bart

[benedicte]

I don't think the XML parser for resources can be used for something else than loading resources...

You should have a look at wxXML2 (http://wxcode.sourceforge.net/components/wxxml2/).

[priyank_bolia]

In the previous threads I heard of http://www.grinninglizard.com/tinyxml/ as an alternative, though I am still looking for the best one. Very confusing issue like which editor to use.

[ssigala]

Hi,
I just need a small xml parser in my app,

I strongly suggest TinyXML. It it very small, well documented and very well written (you can customize it after 5 minutes of reading the code).

[hongxing]

I compared tinyxml,xerces-c,libxml,wxxml2,expat
tinyxml is good, but it can not support Unicode.
libxml is difficult to compile.
xerces-c is used and supported by many company and community, so it is
suitable for my project.

[Chr]

mmh, look at the license too!
If you make a commercial app a more liberal license is good (not the GPL)

[netsuvi]

I have to port some java lines to C++ (wxwidgets library if possible)
Can someone give me a tip on this ? What is the best way to port this.
What XMLParser should I use?

// import org.w3c.dom.*; and import java.xml.parser";
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(urlString);
NodeList nodes = document.getElementsByTagName("RecommendedURL");
Node n = nodes.item(0);
while(n.getNodeType() != Node.TEXT_NODE) {
n=n.getFirstChild();
}
return n.getNodeValue();
} catch (SAXException sxe) {
// Error generated during parsing)
System.out.println("SAXException getRecommendedServer()");
sxe.printStackTrace();
} catch (ParserConfigurationException pce) {
// Parser with specified options can't be built
System.out.println("ParserException getRecommendedServer()");
pce.printStackTrace();
} catch (IOException ioe) {
// I/O error
System.out.println("IOExceptiongetRecommendedServer()");
ioe.printStackTrace();
} */

[Sof_T]

I personally use wxXML since it is included with the distribution. I find it extremely easy to use for basic xml, it doesn't support some features like preserving comments.

The header contains the following warning

CAUTION! *
* *
* The API defined in this header *WILL* change in the future and backward *
* compatibility will *not* be preserved. If you use these classes in your *
* application, it probably won't compile with future wxWidgets releases. *
* Use on your own risk.

but since the file is dated year 2000 and it is still there I guess there is no problem to continue to use it until it is replaced. If you need example code I can provide some.

[netsuvi]

Hi. Examples would be great. Can you post a link for downloading?

[toxicBunny]

I've also started using the wxXml classes for my XML parsing. Since they are used by the XRC classes, and more recently the new rich text classes, I doubt they'll be changing drastically in the near future. If it changes in a future release, I can always change my parsing code when I upgrade.

I made versions of a class using TinyXML, wxXml, and wxXml2 as a test. The code for all three was fairly similar and easy to convert between them. TinyXML requires a little work to convert strings and doesn't support unicode as previously mentioned. wxXml2 adds validation support for XML using a DTD, but it also adds dependencies on libxml2 (and libiconv under Windows).

Since the wxXml classes are already included in the wxWidgets release, I don't see any reason not to use them. There are some convenience functions that could be added, but the basic functionality is already there.

You can look at the XRC source files for some examples, or I could post some of the code I use for parsing the report writer XML files.

-Scott

[Sof_T]

I've also started using the wxXml classes for my XML parsing. Since they are used by the XRC classes, and more recently the new rich text classes, I doubt they'll be changing drastically in the near future. If it changes in a future release, I can always change my parsing code when I upgrade.

I agree with ToxicBunny's feelings here. Use what is available and if it changes in the future well it will be necessary to make some small changes to your existing code.

It would be nice to know the future of wxXml (anyone?). A few enhancements to the existing framework would be nice if no major changes are planned for the future.

The following is my code for loading an xml document and parsing it for the needed information. (I load from a zip file hence the name).

Code: Select all

             wxXmlDocument XMLDocument(ZipInputStream);
             if(XMLDocument.IsOk())
             {
                 wxXmlNode * RootNode = XMLDocument.GetRoot();
                 //Set the widgets name
                 TempWidget->SetName(RootNode->GetName());
                 wxXmlProperty * PropertyList = RootNode->GetProperties();
                 do
                 {
                     //Get the name of the current XML property
                     wxString PropertyName = PropertyList->GetName();
                     if(PropertyName.CmpNoCase("type")==0)
                     {
                         //Get the type of the base widget
                         TempWidget->SetType(PropertyList->GetValue());
                     }
                     else if(PropertyName.CmpNoCase("palette")==0 || PropertyName.CmpNoCase("pallete")==0)
                     {
                         //Get the palette the widget belongs on
                         Palette = PropertyList->GetValue();
                     }
                     //Disregard the icon name has no relevance
                     /*else if(PropertyName.CmpNoCase("icon")==0)
                     {
                         EdtIconName->SetValue(PropertyList->GetValue());
                     }*/
                     else if(PropertyName.CmpNoCase("mediaplayer")==0)
                     {
                         //Get the media player type this widget is for
                         MediaPlayer = PropertyList->GetValue();
                     }
                     else if(PropertyName.CmpNoCase("version")==0)
                     {
                         //Get the version of the media player this widget is for
                         MediaVersion = PropertyList->GetValue();
                     }
                     else if(PropertyName.CmpNoCase("os")==0)
                     {
                         //Get the operating system the media player runs on
                         OS = PropertyList->GetValue();
                     }
                     else if(PropertyName.CmpNoCase("tooltip")==0)
                     {
                         //Get the tooltip for the palette button
                         Tooltip = PropertyList->GetValue();
                     }
                     PropertyList = PropertyList->GetNext();
                 }while(PropertyList);
     
                 //Get the list of the attributes and methods for this widget
                 wxXmlNode * ChildrenNodes = RootNode->GetChildren();
     
                 do
                 {
                     wxString NodeType = ChildrenNodes->GetName();
                     //Get attribute values and add to Temp widget
                     if(NodeType.CmpNoCase("ATTRIBUTE")==0)
                     {
                         wxString TempName = ChildrenNodes->GetPropVal(_T("name"),_T(""));
                         wxString TempType = ChildrenNodes->GetPropVal(_T("valuetype"),_T(""));
                         wxString TempDefault = ChildrenNodes->GetPropVal(_T("defaultvalue"),_T(""));
                         wxString TempDesign = ChildrenNodes->GetPropVal(_T("design"),_T(""));
                         wxString TempRun = ChildrenNodes->GetPropVal(_T("run"),_T(""));
                         TempWidget->AddAttribute(TempName,TempType,TempDefault,TempDesign,TempRun);
                     }
                     //Get events and methods for the widget and add them on
                     else if(NodeType.CmpNoCase("METHOD")==0)
                     {
                         wxString TempName = ChildrenNodes->GetPropVal(_T("name"),_T(""));
                         wxString TempType = ChildrenNodes->GetPropVal(_T("methodtype"),_T(""));
                         wxString TempParameters = ChildrenNodes->GetPropVal(_T("parameterlist"),_T(""));
                         wxString TempDefault = ChildrenNodes->GetPropVal(_T("defaultvalue"),_T(""));
                         if(TempType.CmpNoCase(wxT("Event")))
                         {
                             SkinDocWidgetEvent * TempEvent = new SkinDocWidgetEvent();
                             TempEvent->SetName(TempName);
                             TempEvent->SetParameterList(TempParameters);
                             TempEvent->SetDefault(TempDefault);
                             //Add to the event list
                             TempWidget->AddEvent(TempEvent);
                         }
                         else
                         {
                             SkinDocWidgetMethod * TempMethod = new SkinDocWidgetMethod();
                             TempMethod->SetName(TempName);
                             TempMethod->SetParameterList(TempParameters);
                             TempMethod->SetDefault(TempDefault);
                             //Add to the method list
                             TempWidget->AddMethod(TempMethod);
                         }
                     }
                     ChildrenNodes = ChildrenNodes->GetNext();
                 }while(ChildrenNodes);
             }
         }

I hope this helps.

Sof.T

[netsuvi]

It compiles but I get a linker error:

Linking...
HTConnector.obj : error LNK2019: unresolved external symbol "public: __thiscall wxXmlDocument::wxXmlDocument(void)" (??0wxXmlDocument@@QAE@XZ) referenced in function "public: __thiscall HTConnector::HTConnector(void)" (??0HTConnector@@QAE@XZ)
HTConnector.obj : error LNK2019: unresolved external symbol "public: __thiscall wxXmlNode::~wxXmlNode(void)" (??1wxXmlNode@@QAE@XZ) referenced in function "public: void * __thiscall wxXmlNode::`scalar deleting destructor'(unsigned int)" (??_GwxXmlNode@@QAEPAXI@Z)
HTConnector.obj : error LNK2019: unresolved external symbol "public: class wxXmlDocument & __thiscall wxXmlDocument::operator=(class wxXmlDocument const &)" (??4wxXmlDocument@@QAEAAV0@ABV0@@Z) referenced in function "public: class wxString __thiscall HTConnector::getRecommendedServer(void)" (?getRecommendedServer@HTConnector@@QAE?AVwxString@@XZ)
HTConnector.obj : error LNK2019: unresolved external symbol "public: __thiscall wxXmlDocument::wxXmlDocument(class wxInputStream &,class wxString const &)" (??0wxXmlDocument@@QAE@AAVwxInputStream@@ABVwxString@@@Z) referenced in function "public: class wxString __thiscall HTConnector::getRecommendedServer(void)" (?getRecommendedServer@HTConnector@@QAE?AVwxString@@XZ)
vc_mswd\htconnect.exe : fatal error LNK1120: 4 unresolved externals

Can someone help me to solve this?

[benedicte]

which wx libs are you linking your app with ?

[netsuvi]

I am using VC8 and I have input dependencies to

wxmsw26d_core.lib
wxbase26d_net.lib
wxbase26d.lib
wxtiffd.lib
wxjpegd.lib
wxpngd.lib
wxzlibd.lib
wxregexd.lib
wxexpatd.lib
winmm.lib
comctl32.lib
rpcrt4.lib
wsock32.lib
oleacc.lib
odbc32.lib

am I missing somtehing? Everthing else links, just not xml.h/xml.cpp

[benedicte]

The XRC sample uses:

• wxmsw26ud_xrc.lib
  wxmsw26ud_html.lib
  wxmsw26ud_adv.lib
  wxmsw26ud_core.lib
  wxbase26ud_xml.lib
  wxbase26ud.lib
  wxtiffd.lib
  wxjpegd.lib
  wxpngd.lib
  wxzlibd.lib
  wxregexud.lib
  wxexpatd.lib
  kernel32.lib
  user32.lib
  gdi32.lib
  comdlg32.lib
  winspool.lib
  winmm.lib
  shell32.lib
  comctl32.lib
  ole32.lib
  oleaut32.lib
  uuid.lib
  rpcrt4.lib
  advapi32.lib
  wsock32.lib
  oleacc.lib
  odbc32.lib

As XRC uses the XML parser, you may need some of the libs listed here.