 | | | XML Schema Validation problems | XML Schema Validation problems 2004-02-02 - By Ashwin Desai
Hi,
I am using the xerces 2.6 parser to validate xml documents against
their schema. I have even set the correct features required for
schema checking (as in samples/sax/Counter.java). But, for some weird
reason, my xml documents are not getting validated. Also, the parser
does not complain about any features not being supported.
JDK VERSION: java version "1.3.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-b24)
Java HotSpot(TM) Client VM (build 1.3.1-b24, mixed mode)
XERCES VERSION: xerces-2_6_0
I am enclosing the code where I set the features. I would appreciate
your help with this.
/** Namespaces feature id (http://xml.org/sax/features/namespaces).
*/
protected static final String NAMESPACES_FEATURE_ID =
"http://xml.org/sax/features/namespaces";
/** Namespace prefixes feature id
(http://xml.org/sax/features/namespace-prefixes). */
protected static final String NAMESPACE_PREFIXES_FEATURE_ID =
"http://xml.org/sax/features/namespace-prefixes";
/** Validation feature id (http://xml.org/sax/features/validation).
*/
protected static final String VALIDATION_FEATURE_ID =
"http://xml.org/sax/features/validation";
/** Schema validation feature id
(http://apache.org/xml/features/validation/schema). */
protected static final String SCHEMA_VALIDATION_FEATURE_ID =
"http://apache.org/xml/features/validation/schema";
/** Schema full checking feature id
(http://apache.org/xml/features/validation/schema-full-checking). */
protected static final String SCHEMA_FULL_CHECKING_FEATURE_ID =
"http://apache.org/xml/features/validation/schema-full-checking";
/** Dynamic validation feature id
(http://apache.org/xml/features/validation/dynamic). */
protected static final String DYNAMIC_VALIDATION_FEATURE_ID =
"http://apache.org/xml/features/validation/dynamic";
/** Default parser name. */
protected static final String DEFAULT_PARSER_NAME =
"org.apache.xerces.parsers.SAXParser";
/** Default namespaces support (true). */
protected static final boolean DEFAULT_NAMESPACES = true;
/** Default namespace prefixes (false). */
protected static final boolean DEFAULT_NAMESPACE_PREFIXES =
false;
/** Default validation support (false). */
protected static final boolean DEFAULT_VALIDATION = true;
/** Default Schema validation support (false). */
protected static final boolean DEFAULT_SCHEMA_VALIDATION = true;
/** Default Schema full checking support (false). */
protected static final boolean DEFAULT_SCHEMA_FULL_CHECKING =
true;
/** Default dynamic validation support (false). */
protected static final boolean DEFAULT_DYNAMIC_VALIDATION =
false;
/**
* Initializes the features and sets up the parser.
*
* @(protected) SAXException if the features cannot be set.
*/
protected void initializeParser(XMLReader parser) throws
SAXException {
// set parser features
try {
parser.setFeature(NAMESPACES_FEATURE_ID, namespaces);
}
catch (SAXException e) {
System.err.println("warning: Parser does not support
feature ("+NAMESPACES_FEATURE_ID+")");
throw e;
}
try {
parser.setFeature(NAMESPACE_PREFIXES_FEATURE_ID,
namespacePrefixes);
}
catch (SAXException e) {
System.err.println("warning: Parser does not support
feature ("+NAMESPACE_PREFIXES_FEATURE_ID+")");
throw e;
}
try {
parser.setFeature(VALIDATION_FEATURE_ID, validation);
}
catch (SAXException e) {
System.err.println("warning: Parser does not support
feature ("+VALIDATION_FEATURE_ID+")");
throw e;
}
try {
parser.setFeature(SCHEMA_VALIDATION_FEATURE_ID,
schemaValidation);
}
catch (SAXNotRecognizedException e) {
System.err.println("warning: Parser does not support
feature ("+SCHEMA_VALIDATION_FEATURE_ID+")");
throw e;
}
catch (SAXNotSupportedException e) {
System.err.println("warning: Parser does not support
feature ("+SCHEMA_VALIDATION_FEATURE_ID+")");
throw e;
}
try {
parser.setFeature(SCHEMA_FULL_CHECKING_FEATURE_ID,
schemaFullChecking);
}
catch (SAXNotRecognizedException e) {
System.err.println("warning: Parser does not support
feature ("+SCHEMA_FULL_CHECKING_FEATURE_ID+")");
throw e;
}
catch (SAXNotSupportedException e) {
System.err.println("warning: Parser does not support
feature ("+SCHEMA_FULL_CHECKING_FEATURE_ID+")");
throw e;
}
try {
parser.setFeature(DYNAMIC_VALIDATION_FEATURE_ID,
dynamicValidation);
}
catch (SAXNotRecognizedException e) {
System.err.println("warning: Parser does not support
feature ("+DYNAMIC_VALIDATION_FEATURE_ID+")");
}
catch (SAXNotSupportedException e) {
System.err.println("warning: Parser does not support
feature ("+DYNAMIC_VALIDATION_FEATURE_ID+")");
}
}
void start()
{
XMLReader xmlReader = XMLReaderFactory.createXMLReader
(DEFAULT_PARSER_NAME);
// Sets the features.
initializeParser(xmlReader);
BufferedReader fileReader = new BufferedReader (new
FileReader (new File (_fileName)));
xmlReader.setContentHandler (this._handler);
xmlReader.setErrorHandler (this._handler);
}
Thanks a lot,
Ashwin.
=====
Ashwin Desai.
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