src/main/java/org/jboss/util/xml/catalog/readers/ExtendedXMLCatalogReader.java
public void startElement (String namespaceURI,
			    String localName,
			    String qName,
			    Attributes atts)
    throws SAXException {

    // Check before calling the super because super will report our
    // namespace as an extension namespace, but that doesn't count
    // for this element.
    boolean inExtension = inExtensionNamespace();

    super.startElement(namespaceURI, localName, qName, atts);

    int entryType = -1;
    Vector entryArgs = new Vector();

    if (namespaceURI != null && extendedNamespaceName.equals(namespaceURI)
	&& !inExtension) {
      // This is an Extended XML Catalog entry

      if (atts.getValue("xml:base") != null) {
	String baseURI = atts.getValue("xml:base");
	entryType = Catalog.BASE;
	entryArgs.add(baseURI);
	baseURIStack.push(baseURI);

	debug.message(4, "xml:base", baseURI);

	try {
	  CatalogEntry ce = new CatalogEntry(entryType, entryArgs);
	  catalog.addEntry(ce);
	} catch (CatalogException cex) {
	  if (cex.getExceptionType() == CatalogException.INVALID_ENTRY_TYPE) {
	    debug.message(1, "Invalid catalog entry type", localName);
	  } else if (cex.getExceptionType() == CatalogException.INVALID_ENTRY) {
	    debug.message(1, "Invalid catalog entry (base)", localName);
	  }
	}

	entryType = -1;
	entryArgs = new Vector();
      } else {
	baseURIStack.push(baseURIStack.peek());
      }

      if (localName.equals("uriSuffix")) {
	if (checkAttributes(atts, "suffix", "uri")) {
	  entryType = Resolver.URISUFFIX;
	  entryArgs.add(atts.getValue("suffix"));
	  entryArgs.add(atts.getValue("uri"));

	  debug.message(4, "uriSuffix",
			atts.getValue("suffix"),
			atts.getValue("uri"));
	}
      } else if (localName.equals("systemSuffix")) {
	if (checkAttributes(atts, "suffix", "uri")) {
	  entryType = Resolver.SYSTEMSUFFIX;
	  entryArgs.add(atts.getValue("suffix"));
	  entryArgs.add(atts.getValue("uri"));

	  debug.message(4, "systemSuffix",
			atts.getValue("suffix"),
			atts.getValue("uri"));
	}
      } else {
	// This is equivalent to an invalid catalog entry type
	debug.message(1, "Invalid catalog entry type", localName);
      }

      if (entryType >= 0) {
	try {
	  CatalogEntry ce = new CatalogEntry(entryType, entryArgs);
	  catalog.addEntry(ce);
	} catch (CatalogException cex) {
	  if (cex.getExceptionType() == CatalogException.INVALID_ENTRY_TYPE) {
	    debug.message(1, "Invalid catalog entry type", localName);
	  } else if (cex.getExceptionType() == CatalogException.INVALID_ENTRY) {
	    debug.message(1, "Invalid catalog entry", localName);
	  }
	}
      }
    }
  }
public void startElement (String namespaceURI,
			    String localName,
			    String qName,
			    Attributes atts)
    throws SAXException {

    // Check before calling the super because super will report our
    // namespace as an extension namespace, but that doesn't count
    // for this element.
    boolean inExtension = inExtensionNamespace();

    super.startElement(namespaceURI, localName, qName, atts);

    int entryType = -1;
    Vector entryArgs = new Vector();

    if (namespaceURI != null && extendedNamespaceName.equals(namespaceURI)
	&& !inExtension) {
      // This is an Extended XML Catalog entry

      if (atts.getValue("xml:base") != null) {
	String baseURI = atts.getValue("xml:base");
	entryType = Catalog.BASE;
	entryArgs.add(baseURI);
	baseURIStack.push(baseURI);

	debug.message(4, "xml:base", baseURI);

	try {
	  CatalogEntry ce = new CatalogEntry(entryType, entryArgs);
	  catalog.addEntry(ce);
	} catch (CatalogException cex) {
	  if (cex.getExceptionType() == CatalogException.INVALID_ENTRY_TYPE) {
	    debug.message(1, "Invalid catalog entry type", localName);
	  } else if (cex.getExceptionType() == CatalogException.INVALID_ENTRY) {
	    debug.message(1, "Invalid catalog entry (base)", localName);
	  }
	}

	entryType = -1;
	entryArgs = new Vector();
      } else {
	baseURIStack.push(baseURIStack.peek());
      }

      if (localName.equals("uriSuffix")) {
	if (checkAttributes(atts, "suffix", "uri")) {
	  entryType = Resolver.URISUFFIX;
	  entryArgs.add(atts.getValue("suffix"));
	  entryArgs.add(atts.getValue("uri"));

	  debug.message(4, "uriSuffix",
			atts.getValue("suffix"),
			atts.getValue("uri"));
	}
      } else if (localName.equals("systemSuffix")) {
	if (checkAttributes(atts, "suffix", "uri")) {
	  entryType = Resolver.SYSTEMSUFFIX;
	  entryArgs.add(atts.getValue("suffix"));
	  entryArgs.add(atts.getValue("uri"));

	  debug.message(4, "systemSuffix",
			atts.getValue("suffix"),
			atts.getValue("uri"));
	}
      } else {
	// This is equivalent to an invalid catalog entry type
	debug.message(1, "Invalid catalog entry type", localName);
      }

      if (entryType >= 0) {
	try {
	  CatalogEntry ce = new CatalogEntry(entryType, entryArgs);
	  catalog.addEntry(ce);
	} catch (CatalogException cex) {
	  if (cex.getExceptionType() == CatalogException.INVALID_ENTRY_TYPE) {
	    debug.message(1, "Invalid catalog entry type", localName);
	  } else if (cex.getExceptionType() == CatalogException.INVALID_ENTRY) {
	    debug.message(1, "Invalid catalog entry", localName);
	  }
	}
      }
    }
  }
The SAX <code>startElement</code> method recognizes elements
from the plain catalog format and instantiates CatalogEntry
objects for them.

@param namespaceURI The namespace name of the element.
@param localName The local name of the element.
@param qName The QName of the element.
@param atts The list of attributes on the element.

@see CatalogEntry