[From nobody Fri Aug  6 17:08:12 2004
Date: Mon, 02 Dec 2002 10:16:20 +0100
From: Kenneth Ellefsen <kellefsen@bergen.oilfield.slb.com>
Subject: Re: [jdom-interest] JDOM and XML Schema
In-reply-to: <016701c297c7$ce9a4ce0$cdca8f93@BijouLaptop>
To: Phillip Beauvoir <p.beauvoir@bolton.ac.uk>
Message-id: <1038820580.4723.24.camel@kenneth>
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References: <001601c2979f$0aca9cc0$cdca8f93@BijouLaptop>
	<1038574079.32287.65.camel@kenneth>
	<016701c297c7$ce9a4ce0$cdca8f93@BijouLaptop>

Hi.

this is just of the top of my head, but isn't int a URI? In which case
you'll have to use "file:path", someone correct me if I'm wrong...

Regards,
Kenneth

On Fri, 2002-11-29 at 17:53, Phillip Beauvoir wrote:
> Hi there:
> 
> thanks for that very helpful information.  The only problem I'm having is the 3 parameters to XMLInputSource.  What do I use?  You get yours from the DocType.  I can't do that.  I wrote this:
> 
> 
>             String schemaFile = "d:\\myschema.xsd";
> 
>             org.apache.xerces.xni.parser.XMLInputSource in =
>                 new org.apache.xerces.xni.parser.XMLInputSource(
>                     schemaFile,
>                     schemaFile,
>                     schemaFile);
> 
>             in.setCharacterStream(new FileReader(schemaFile));
> 
>             org.apache.xerces.impl.xs.XMLSchemaLoader loader =
>                 new org.apache.xerces.impl.xs.XMLSchemaLoader();
> 
>             org.apache.xerces.xni.grammars.Grammar grammar = loader.loadGrammar(in);
> 
>             org.apache.xerces.xni.grammars.XSGrammar xsgrammar =
>                 (org.apache.xerces.xni.grammars.XSGrammar)grammar;
> 
>             org.apache.xerces.impl.xs.psvi.XSModel xsmodel = xsgrammar.toXSModel();
> 
>   ----- Original Message ----- 
>   From: Kenneth Ellefsen 
>   To: Phillip Beauvoir 
>   Cc: jdom-interest@jdom.org 
>   Sent: Friday, November 29, 2002 12:47 PM
>   Subject: Re: [jdom-interest] JDOM and XML Schema
> 
> 
>   Hi,
> 
>   I ended up reinventing the wheel when I needed to use my DTD file...
> 
>   Maby the difference between DTD/schema isn't that big...
> 
>   Anyway, if it helps....
> 
> 
>   I have now made the following piece of code that solves my problem with
>   retreving a DTD enumeration of valid values for a given attribute.
> 
>   Posting it here in case someone else can have a use for it.
> 
> 
> 
>   // e is an org.jdom.Element
>   // replace sertain static strings as you need
> 
> 
>   org.jdom.DocType dt = e.getDocument().getDocType();
> 
> 
>   // Load and parse the DTD file...
> 
>   org.apache.xerces.impl.dtd.XMLDTDLoader dtdloader =
>   new org.apache.xerces.impl.dtd.XMLDTDLoader();
>       
>   org.apache.xerces.xni.parser.XMLInputSource input =
>   new org.apache.xerces.xni.parser.XMLInputSource(
>      dt.getPublicID(),
>      "/full/path/to/dtdfile/"+dt.getSystemID(),
>      //^^this is the absolute path to the dtd file^^
>      dt.getSystemID());
>      
>   org.apache.xerces.impl.dtd.DTDGrammar grammar = null;
>   try{
>      grammar =(org.apache.xerces.impl.dtd.DTDGrammar)
>      dtdloader.loadGrammar(input);
>   }
>   catch(Exception ex){
>      System.out.println("Error when reading DTD:\n\n"+ex);
>      return;
>   }
> 
> 
>   // And now for the interesting part where
>   // we search for the element/attribute name in the DTD
> 
>   org.apache.xerces.impl.dtd.XMLAttributeDecl att = 
>   new org.apache.xerces.impl.dtd.XMLAttributeDecl();
> 
>   org.apache.xerces.impl.dtd.XMLElementDecl elm = 
>   new org.apache.xerces.impl.dtd.XMLElementDecl();
>         
>   String[] enum = null;
>   String elmName = e.getName();
> 
>         
>   int i = grammar.getFirstElementDeclIndex();
> 
>   while( grammar.getElementDecl(i,elm) &&
>          !elm.name.localpart.equals(elmName) )
>   {
>      i = grammar.getNextElementDeclIndex(i);
>   }
> 
>         
>   int j = grammar.getFirstAttributeDeclIndex(i);
>         
>   while( grammar.getAttributeDecl(j, att) &&
>          !att.name.localpart.equals("value") )
>   {
>      j = grammar.getNextAttributeDeclIndex(j);
>   }
> 
>   enum = att.simpleType.enumeration;
> 
>   // enum - contains ether null, or a String[] representing
>   // the (value1|value2|value3) definition of attribute "value"
>   // for the element in question
> 
> 
> 
> 
>   On Fri, 2002-11-29 at 13:01, Phillip Beauvoir wrote:
>   > Hi there!
>   > 
>   > Sorry if this has been asked before.
>   > 
>   > I'm loading an XML Schema file into a JDOM document and then trying to create a hierarchical model with accessor methods to query various parts of the Schema to control an XML Editor.  Then I realise that surely somebody must have done this already?  Basically I want to:
>   > 
>   > 1.  Read the XML Schema into a JDOM Document (easy, I can do this)
>   > 2.  Write an API to access the Schema Elements, Constraints, etc.
>   > 
>   > Anybody know if this has been done already, saving me re-inventing the wheel?
>   > 
>   > Cheers!
>   > 
>   > Phil Beauvoir
>   -- 
>   Mvh,
> 
>   Kenneth Ellefsen                   | Tlf: (+47) 55985829
>   Schlumberger Information Solutions | www.sis.slb.com
> 
> 
-- 
Mvh,

Kenneth Ellefsen                   | Tlf: (+47) 55985829
Schlumberger Information Solutions | www.sis.slb.com

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