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RE: xerces-j validation issues

From: Tom Preston <tpreston@amadeusboston.com>
Date: Thu, 6 Dec 2001 12:35:48 -0500
Message-ID: <498B0C8F9141D511927B009027B11387368997@email-temp.vacation-corp.com>
To: Eddie Robertsson <eddie@allette.com.au>
Cc: "XMLSchema (E-mail)" <xmlschema-dev@w3.org>
Eddie, all,

I fixed the updateTime and boolean values but I don't think that was the
root of the problem.  I am using Xerces2.0.0beta3 xerces.jar...here is the
output:

C:\xml>java -classpath .;c:\vcom\bin\xerces\xerces.jar ValidatingDOM
editor99.xm
l
org.xml.sax.SAXNotRecognizedException:
http://apache.org/xml/properties/schema/e
xternal-schemaLocation
Error:  org.xml.sax.SAXParseException: Document is invalid: no grammar
found.
htmlEditor
updateTime
fields
field
shortDesc
htmlType
name
value
allowNull
defaultVal

Maybe my code is not good?  Do I have to specify a "grammar" in the code?  I
always get the grammar problem even when commenting out the
parser.setProperty below.  Here is the code:

import org.apache.xerces.parsers.DOMParser;
import org.xml.sax.ErrorHandler;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import java.io.IOException;

//  A Valdating DOM Application
//  with registered Error Handlers
public class ValidatingDOM implements ErrorHandler {
    
    // Constructor
    public ValidatingDOM (String xmlFile) {
        //  Create a Xerces DOM Parser
        DOMParser parser = new DOMParser();
    
        //  Turn Validation on
        try {
            parser.setFeature 
            ("http://xml.org/sax/features/validation", 
            true);
            parser.setProperty
 
("http://apache.org/xml/properties/schema/external-schemaLocation",
            "http://www.emilygraham.com/java/other/editor.xsd");
        } catch (SAXNotRecognizedException e) {
            System.err.println (e);
        } catch (SAXNotSupportedException e) {
            System.err.println (e);
        }
    
        //  Register Error Handler
        parser.setErrorHandler (this);

        //  Parse the Document      
        //  and traverse the DOM
        try {
            parser.parse(xmlFile);
            Document document = parser.getDocument();
            traverse (document);
        } catch (SAXException e) {
            System.err.println (e);
        } catch (IOException e) {
            System.err.println (e);
        }
    }
    
    //  Traverse DOM Tree.  Print out Element Names
    private void traverse (Node node) {
        int type = node.getNodeType();
        if (type == Node.ELEMENT_NODE)
            System.out.println (node.getNodeName());
        NodeList children = node.getChildNodes();
        if (children != null) {
            for (int i=0; i< children.getLength(); i++) 
                traverse (children.item(i));    
        }
    }
    
    //  Warning Event Handler
    public void warning (SAXParseException e)
        throws SAXException {
        System.err.println ("Warning:  "+e);
    }

    //  Error Event Handler
    public void error (SAXParseException e)
        throws SAXException {
        System.err.println ("Error:  "+e);
    }
    
    //  Fatal Error Event Handler
    public void fatalError (SAXParseException e)
        throws SAXException {
        System.err.println ("Fatal Error:  "+e);
    }
    
    // Main Method
    public static void main (String[] args) {
        ValidatingDOM validatingDOM = 
        	new ValidatingDOM (args[0]);
    }
}


-----Original Message-----
From: Eddie Robertsson [mailto:eddie@allette.com.au]
Sent: Wednesday, December 05, 2001 5:42 PM
To: Tom Preston
Cc: XMLSchema (E-mail)
Subject: Re: xerces-j validation issues


> What is this problem?
>
> Here is the doc set (which XSV thinks is fine):
>
> XML IS:
> -----------
> <htmlEditor
>   xmlns="http://www.emilygraham.com/java/other/Editor"
>   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>   xsi:schemaLocation="http://www.emilygraham.com/java/other/Editor
>   http://www.emilygraham.com/java/other/editor.xsd">
>
>   <updateTime></updateTime>
>   <fields>
>     <field columnName="nickname">
>       <shortDesc>Short Desc</shortDesc>
>       <htmlType name="select">
>         <name>firstName</name>
>         <value>lastName</value>
>       </htmlType>
>       <allowNull>adfsa</allowNull>
>       <defaultVal>Blueberry</defaultVal>
>     </field>
>   </fields>
> </htmlEditor>

Apart from the fact that <updateTime> doesn't have a valid dateTime and that
"adfsa" isn't a valid boolean for element <allowNull> it all seems fine to
me
(XSV wouldn't catch this because simpleType checking isn't implemented yet).
What version of Xerces are you using?
I just tried it with Xercex 2 beta and it validated fine.

Cheers,
/Eddie

>
> ----------
> XSD IS:
> ----------
> <schema targetNamespace="http://www.emilygraham.com/java/other/Editor"
>         xmlns="http://www.w3.org/2001/XMLSchema"
>         xmlns:e="http://www.emilygraham.com/java/other/Editor"
>         elementFormDefault="qualified">
>
>   <annotation>
>     <documentation xml:lang="en">
>      Editor document definition defines an html based editor
>     </documentation>
>   </annotation>
>
>   <element name="htmlEditor" type="e:HtmlEditorType"/>
>
>   <element name="updateTime" type="dateTime"/>
>
>   <complexType name="HtmlEditorType">
>     <sequence>
>       <element ref="e:updateTime" minOccurs="1" maxOccurs="1" />
>       <element name="fields" type="e:Fields" minOccurs="1" maxOccurs="1"
/>
>     </sequence>
>   </complexType>
>
>   <complexType name="Fields">
>     <sequence>
>       <element name="field" minOccurs="1" maxOccurs="unbounded">
>         <complexType>
>           <sequence>
>             <element name="shortDesc" type="string" minOccurs="1"
> maxOccurs="1"/>
>             <element name="htmlType" type="e:HtmlTypeType" minOccurs="1"
> maxOccurs="1"/>
>             <element name="allowNull" type="boolean" minOccurs="1"
> maxOccurs="1" />
>             <element name="defaultVal"  type="string"/>
>           </sequence>
>           <attribute name="columnName" type="string" use="required"/>
>         </complexType>
>       </element>
>     </sequence>
>   </complexType>
>
>   <complexType name="HtmlTypeType">
>     <sequence>
>       <element name="name" type="string" />
>       <element name="value" type="string" />
>     </sequence>
>     <attribute name="name" type="e:HtmlNameType" use="required"/>
>   </complexType>
>
>   <simpleType name="HtmlNameType">
>     <restriction base="NMTOKEN">
>       <enumeration value="select"/>
>       <enumeration value="text"/>
>     </restriction>
>   </simpleType>
> </schema>
>
> ------------
>
> 2) When i attept to force external validation with this line of code:
>
> parser.setProperty
>
> ("http://apache.org/xml/properties/schema/external-schemaLocation",
>             "http://www.emilygraham.com/java/other/editor.xsd");
>
> I get this exception:
>
> org.xml.sax.SAXNotRecognizedException:
> http://apache.org/xml/properties/schema/external-schemaLocation
>
> Does anyone know why this would happen?
>
> --------
> 3) Does anyone know where I can get a set of very simple documents that
will
> pass MANY different validations.  Just one example would be nice.
>
> Thanks
>
> Tom
Received on Thursday, 6 December 2001 12:35:56 GMT

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