nonvalidator.java

Nano的XML解析器

         XMLUtil.skipTag(reader);
         return;
      }

      XMLUtil.skipWhitespace(reader, null);

      String str = XMLUtil.read(reader, '%');
      char ch = str.charAt(0);

      if (ch != '[') {
         XMLUtil.skipTag(reader);
         return;
      }

      Reader subreader = new CDATAReader(reader);
      subreader.close();
   }


   /**
    * Processes an ATTLIST element.
    *
    * @param reader         the reader to read data from.
    * @param entityResolver the entity resolver.
    *
    * @throws java.lang.Exception
    *     If something went wrong.
    */
   protected void processAttList(IXMLReader         reader,
                                 IXMLEntityResolver entityResolver)
      throws Exception
   {
      if (! XMLUtil.checkLiteral(reader,  "TTLIST")) {
         XMLUtil.skipTag(reader);
         return;
      }

      XMLUtil.skipWhitespace(reader, null);
      String str = XMLUtil.read(reader, '%');
      char ch = str.charAt(0);
      while (ch == '%') {
         XMLUtil.processEntity(str, reader,
                               this.parameterEntityResolver);
         str = XMLUtil.read(reader, '%');
         ch = str.charAt(0);
      }
      reader.unread(ch);
      String elementName = XMLUtil.scanIdentifier(reader);
      XMLUtil.skipWhitespace(reader, null);
      
      str = XMLUtil.read(reader, '%');
      ch = str.charAt(0);
      while (ch == '%') {
         XMLUtil.processEntity(str, reader,
                               this.parameterEntityResolver);
         str = XMLUtil.read(reader, '%');
         ch = str.charAt(0);
      }

      Properties props = new Properties();

      while (ch != '>') {
         reader.unread(ch);
         String attName = XMLUtil.scanIdentifier(reader);
         XMLUtil.skipWhitespace(reader, null);
         ch = XMLUtil.readChar(reader, '%');

         if (ch == '(') {
            while (ch != ')') {
               ch = XMLUtil.readChar(reader, '%');
            }
         } else {
            reader.unread(ch);
            XMLUtil.scanIdentifier(reader);
         }

         XMLUtil.skipWhitespace(reader, null);
         ch = XMLUtil.readChar(reader, '%');

         if (ch == '#') {
            str = XMLUtil.scanIdentifier(reader);
            XMLUtil.skipWhitespace(reader, null);

            if (! str.equals("FIXED")) {
               XMLUtil.skipWhitespace(reader, null);

               str = XMLUtil.read(reader, '%');
               ch = str.charAt(0);
               while (ch == '%') {
                  XMLUtil.processEntity(str, reader,
                                        this.parameterEntityResolver);
                  str = XMLUtil.read(reader, '%');
                  ch = str.charAt(0);
               }

               continue;
            }
         } else {
            reader.unread(ch);
         }

         String value = XMLUtil.scanString(reader, '%',
                                           this.parameterEntityResolver);
         props.put(attName, value);
         XMLUtil.skipWhitespace(reader, null);

         str = XMLUtil.read(reader, '%');
         ch = str.charAt(0);
         while (ch == '%') {
            XMLUtil.processEntity(str, reader,
                                  this.parameterEntityResolver);
            str = XMLUtil.read(reader, '%');
            ch = str.charAt(0);
         }
      }

      if (! props.isEmpty()) {
         this.attributeDefaultValues.put(elementName, props);
      }
   }


   /**
    * Processes an ENTITY element.
    *
    * @param reader         the reader to read data from.
    * @param entityResolver the entity resolver.
    *
    * @throws java.lang.Exception
    *     If something went wrong.
    */
   protected void processEntity(IXMLReader         reader,
                                IXMLEntityResolver entityResolver)
      throws Exception
   {
      if (! XMLUtil.checkLiteral(reader, "NTITY")) {
         XMLUtil.skipTag(reader);
         return;
      }

      XMLUtil.skipWhitespace(reader, null);
      char ch = XMLUtil.readChar(reader, '\0');

      if (ch == '%') {
         XMLUtil.skipWhitespace(reader, null);
         entityResolver = this.parameterEntityResolver;
      } else {
         reader.unread(ch);
      }

      String key = XMLUtil.scanIdentifier(reader);
      XMLUtil.skipWhitespace(reader, null);
      ch = XMLUtil.readChar(reader, '%');
      String systemID = null;
      String publicID = null;

      switch (ch) {
         case 'P':
            if (! XMLUtil.checkLiteral(reader, "UBLIC")) {
               XMLUtil.skipTag(reader);
               return;
            }

            XMLUtil.skipWhitespace(reader, null);
            publicID = XMLUtil.scanString(reader, '%',
                                          this.parameterEntityResolver);
            XMLUtil.skipWhitespace(reader, null);
            systemID = XMLUtil.scanString(reader, '%',
                                          this.parameterEntityResolver);
            XMLUtil.skipWhitespace(reader, null);
            XMLUtil.readChar(reader, '%');
            break;

         case 'S':
            if (! XMLUtil.checkLiteral(reader, "YSTEM")) {
               XMLUtil.skipTag(reader);
               return;
            }

            XMLUtil.skipWhitespace(reader, null);
            systemID = XMLUtil.scanString(reader, '%',
                                          this.parameterEntityResolver);
            XMLUtil.skipWhitespace(reader, null);
            XMLUtil.readChar(reader, '%');
            break;

         case '"':
         case '\'':
            reader.unread(ch);
            String value = XMLUtil.scanString(reader, '%',
                                              this.parameterEntityResolver);
            entityResolver.addInternalEntity(key, value);
            XMLUtil.skipWhitespace(reader, null);
            XMLUtil.readChar(reader, '%');
            break;

         default:
            XMLUtil.skipTag(reader);
      }

      if (systemID != null) {
         entityResolver.addExternalEntity(key, publicID, systemID);
      }
   }


   /**
    * Indicates that an element has been started.
    *
    * @param name       the name of the element.
    * @param systemId   the system ID of the XML data of the element.
    * @param lineNr     the line number in the XML data of the element.
    */
   public void elementStarted(String name,
                              String systemId,
                              int    lineNr)
   {
      Properties attribs
         = (Properties) this.attributeDefaultValues.get(name);

      if (attribs == null) {
         attribs = new Properties();
      } else {
         attribs = (Properties) attribs.clone();
      }

      this.currentElements.push(attribs);
   }


   /**
    * Indicates that the current element has ended.
    *
    * @param name       the name of the element.
    * @param systemId   the system ID of the XML data of the element.
    * @param lineNr     the line number in the XML data of the element.
    */
   public void elementEnded(String name,
                            String systemId,
                            int    lineNr)
   {
      // nothing to do
   }


   /**
    * This method is called when the attributes of an XML element have been
    * processed.
    * If there are attributes with a default value which have not been
    * specified yet, they have to be put into <I>extraAttributes</I>.
    *
    * @param name            the name of the element.
    * @param extraAttributes where to put extra attributes.
    * @param systemId        the system ID of the XML data of the element.
    * @param lineNr          the line number in the XML data of the element.
    */
   public void elementAttributesProcessed(String     name,
                                          Properties extraAttributes,
                                          String     systemId,
                                          int        lineNr)
   {
      Properties props = (Properties) this.currentElements.pop();
      Enumeration enum = props.keys();

      while (enum.hasMoreElements()) {
         String key = (String) enum.nextElement();
         extraAttributes.put(key, props.get(key));
      }
   }


   /**
    * Indicates that an attribute has been added to the current element.
    *
    * @param key        the name of the attribute.
    * @param value      the value of the attribute.
    * @param systemId   the system ID of the XML data of the element.
    * @param lineNr     the line number in the XML data of the element.
    */
   public void attributeAdded(String key,
                              String value,
                              String systemId,
                              int    lineNr)
   {
      Properties props = (Properties) this.currentElements.peek();

      if (props.containsKey(key)) {
         props.remove(key);
      }
   }


   /**
    * Indicates that a new #PCDATA element has been encountered.
    *
    * @param systemId the system ID of the XML data of the element.
    * @param lineNr   the line number in the XML data of the element.
    */
   public void PCDataAdded(String systemId,
                           int    lineNr)
   {
      // nothing to do
   }

}