content: // ExtendedXMLCatalogReader.java - Read XML Catalog files
  
  /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package mf.org.apache.xml.resolver.readers;
  
  import org.xml.sax.Attributes;
  import org.xml.sax.SAXException;
  
  import java.util.Vector;
  
  import mf.org.apache.xml.resolver.Catalog;
  import mf.org.apache.xml.resolver.CatalogEntry;
  import mf.org.apache.xml.resolver.CatalogException;
  import mf.org.apache.xml.resolver.Resolver;
  
  /**
   * Parse Extended OASIS Entity Resolution Technical Committee
   * XML Catalog files.
   *
   * @author Norman Walsh
   *         <a href="mailto:Norman.Walsh@Sun.COM">Norman.Walsh@Sun.COM</a>
   * @version 1.0
   * @see Catalog
   */
  public class ExtendedXMLCatalogReader extends OASISXMLCatalogReader {
      /**
       * The namespace name of extended catalog elements
       */
      public static final String extendedNamespaceName = "http://nwalsh.com/xcatalog/1.0";
  
      /**
       * 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
       */
      @Override
      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>endElement</code> method does nothing.
       */
      @Override
      public void endElement(String namespaceURI,
                             String localName,
                             String qName)
              throws SAXException {
  
          super.endElement(namespaceURI, localName, qName);
  
          // Check after popping the stack so we don't erroneously think we
          // are our own extension namespace...
          boolean inExtension = inExtensionNamespace();
  
          int entryType = -1;
          Vector entryArgs = new Vector();
  
          if (namespaceURI != null
                  && (extendedNamespaceName.equals(namespaceURI))
                  && !inExtension) {
  
              String popURI = (String) baseURIStack.pop();
              String baseURI = (String) baseURIStack.peek();
  
              if (!baseURI.equals(popURI)) {
                  entryType = Catalog.BASE;
                  entryArgs.add(baseURI);
  
                  debug.message(4, "(reset) 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 (rbase)", localName);
                      }
                  }
              }
          }
      }
  }
  