xmlstreamreaderimpl.java

gcc的组建

    switch (eventType)
      {
      case XMLStreamConstants.START_ELEMENT:
        i = ((StartElement) currentEvent).getNamespaces();
        break;
      case XMLStreamConstants.END_ELEMENT:
        i = ((EndElement) currentEvent).getNamespaces();
        break;
      default:
        throw new IllegalStateException();
      }
    int count = 0;
    while (i.hasNext())
      {
        Namespace ns = (Namespace) i.next();
        if (index == count)
          return ns.getNamespaceURI();
        count++;
      }
    return null;
  }

  public NamespaceContext getNamespaceContext()
  {
    return this;
  }

  public int getEventType()
  {
    return eventType;
  }

  public String getText()
  {
    switch (eventType)
      {
      case XMLStreamConstants.CHARACTERS:
      case XMLStreamConstants.CDATA:
      case XMLStreamConstants.SPACE:
        return ((Characters) currentEvent).getData();
      case XMLStreamConstants.COMMENT:
        return ((Comment) currentEvent).getText();
      case XMLStreamConstants.ENTITY_REFERENCE:
        return ((EntityReference) currentEvent).getReplacementText();
      case XMLStreamConstants.DTD:
        return ((DTD) currentEvent).getDocumentTypeDeclaration();
      }
    return null;
  }

  public char[] getTextCharacters()
  {
    String text = getText();
    return (text == null) ? null : text.toCharArray();
  }

  public int getTextCharacters(int sourceStart, char[] target,
                               int targetStart, int length)
    throws XMLStreamException
  {
    char[] source = getTextCharacters();
    int len = Math.min(source.length, length);
    System.arraycopy(source, sourceStart, target, targetStart, len);
    return len;
  }

  public int getTextStart()
  {
    return 0;
  }

  public int getTextLength()
  {
    String text = getText();
    return (text == null) ? 0 : text.length();
  }

  public String getEncoding()
  {
    // XXX SAX doesn't provide this
    return null;
  }

  public boolean hasText()
  {
    return eventType == CHARACTERS || eventType == DTD ||
      eventType == SPACE || eventType == ENTITY_REFERENCE ||
      eventType == COMMENT || eventType == DTD;
  }

  public Location getLocation()
  {
    return currentEvent.getLocation();
  }

  public QName getName()
  {
    switch (eventType)
      {
      case XMLStreamConstants.START_ELEMENT:
        return ((StartElement) currentEvent).getName();
      case XMLStreamConstants.END_ELEMENT:
        return ((EndElement) currentEvent).getName();
      case XMLStreamConstants.ATTRIBUTE:
        return ((Attribute) currentEvent).getName();
      }
    return null;
  }

  public String getLocalName()
  {
    QName name = getName();
    return (name == null) ? null : name.getLocalPart();
  }

  public boolean hasName()
  {
    return getName() != null;
  }

  public String getNamespaceURI()
  {
    QName name = getName();
    return (name == null) ? null : name.getNamespaceURI();
  }

  public String getPrefix()
  {
    QName name = getName();
    return (name == null) ? null : name.getPrefix();
  }
  
  public String getVersion()
  {
    StartDocument sd = (StartDocument) currentEvent;
    return sd.getVersion();
  }

  public boolean isStandalone()
  {
    StartDocument sd = (StartDocument) currentEvent;
    return sd.isStandalone();
  }

  public boolean standaloneSet()
  {
    StartDocument sd = (StartDocument) currentEvent;
    return sd.standaloneSet();
  }
  
  public String getCharacterEncodingScheme()
  {
    StartDocument sd = (StartDocument) currentEvent;
    return sd.getCharacterEncodingScheme();
  }

  public String getPITarget()
  {
    ProcessingInstruction pi = (ProcessingInstruction) currentEvent;
    return pi.getTarget();
  }

  public String getPIData()
  {
    ProcessingInstruction pi = (ProcessingInstruction) currentEvent;
    return pi.getData();
  }

  /**
   * This class is used to construct the event series from SAX callbacks.
   */
  class CallbackHandler
    implements ContentHandler, DTDHandler, LexicalHandler,
               DeclHandler, EntityResolver, ErrorHandler
  {

    XMLReader reader;
    Locator locator;
    Location location;
    private boolean inCDATA;
    private LinkedList namespaces = new LinkedList();
    private LinkedList notations;
    private LinkedList entities;

    CallbackHandler(XMLReader reader)
    {
      this.reader = reader;
    }

    public void setDocumentLocator(Locator locator)
    {
      this.locator = locator;
      location = new LocationImpl(-1,
                                  locator.getColumnNumber(),
                                  locator.getLineNumber(),
                                  locator.getSystemId());
    }

    public void startDocument()
      throws SAXException
    {
      String version = (locator instanceof Locator2) ?
        ((Locator2) locator).getXMLVersion() : null;
      String encoding = (locator instanceof Locator2) ? 
        ((Locator2) locator).getEncoding() : null;
      boolean standalone =
        reader.getFeature("http://xml.org/sax/features/is-standalone");
      boolean standaloneDeclared = standalone;
      boolean encodingDeclared = (encoding != null);
      events.add(new StartDocumentImpl(location,
                                       location.getLocationURI(),
                                       encoding,
                                       version,
                                       standalone,
                                       standaloneDeclared,
                                       encodingDeclared));
    }

    public void endDocument()
      throws SAXException
    {
      events.add(new EndDocumentImpl(location));
    }
    
    public void startPrefixMapping(String prefix, String uri)
      throws SAXException
    {
      namespaces.add(new NamespaceImpl(location, prefix, uri));
    }

    public void endPrefixMapping(String prefix)
      throws SAXException
    {
    }

    public void startElement(String namespaceURI, String localName,
                             String qName, Attributes atts)
      throws SAXException
    {
      LinkedList ns = namespaces;
      namespaces = new LinkedList();
      int ci = qName.indexOf(':');
      String prefix = null;
      localName = qName;
      if (ci != -1)
        {
          prefix = qName.substring(0, ci);
          localName = qName.substring(ci + 1);
        }
      QName name = new QName(namespaceURI, localName, prefix);
      LinkedList attrs = new LinkedList();
      StartElementImpl se = new StartElementImpl(location, name,
                                                 attrs, ns, null);
      events.add(se);
      // Add namespaces
      //for (Iterator i = ns.iterator(); i.hasNext(); )
      //  events.add(i.next());
      // Add attributes
      int len = atts.getLength();
      for (int i = 0; i < len; i++)
        {
          String attURI = atts.getURI(i);
          String attQName = atts.getQName(i);
          String value = atts.getValue(i);
          QName type = QName.valueOf(atts.getType(i));
          boolean specified = (atts instanceof Attributes2) &&
            ((Attributes2) atts).isSpecified(i);
          ci = attQName.indexOf(':');
          String attPrefix = null;
          String attLocalName = attQName;
          if (ci != -1)
            {
              attPrefix = attQName.substring(0, ci);
              attLocalName = attQName.substring(ci + 1);
            }
          if ("xmlns".equals(attPrefix) || "xmlns".equals(attQName))
            continue;
          QName attrName = new QName(attURI, attLocalName, attPrefix);
          AttributeImpl attr = new AttributeImpl(location, attrName,
                                                 value, type, specified);
          attrs.add(attr);
          //events.add(attr);
        }
    }

    public void endElement(String namespaceURI, String localName,
                           String qName)
      throws SAXException
    {
      int ci = qName.indexOf(':');
      String prefix = null;
      localName = qName;
      if (ci != -1)
        {
          prefix = qName.substring(0, ci);
          localName = qName.substring(ci + 1);
        }
      QName name = new QName(namespaceURI, localName, prefix);
      events.add(new EndElementImpl(location, name, new LinkedList()));
      // TODO namespaces out of scope
    }

    public void characters(char[] ch, int start, int length)
      throws SAXException
    {
      boolean whitespace = isWhitespace(ch, start, length);
      events.add(new CharactersImpl(location, new String(ch, start, length),
                                    whitespace, inCDATA, false));
    }
    
    public void ignorableWhitespace(char[] ch, int start, int length)
      throws SAXException
    {
      boolean whitespace = isWhitespace(ch, start, length);
      events.add(new CharactersImpl(location, new String(ch, start, length),
                                    whitespace, inCDATA, true));
    }

    boolean isWhitespace(char[] ch, int start, int len)
    {
      int end = start + len;
      for (int i = start; i < end; i++)
        {
          char c = ch[i];
          if (c != ' ' && c != '\t' && c != '\n' && c != '\r')
            return false;
        }
      return true;
    }

    public void processingInstruction(String target, String data)
      throws SAXException
    {
      events.add(new ProcessingInstructionImpl(location, target, data));
    }

    public void skippedEntity(String name)
      throws SAXException
    {
    }

    public void startDTD(String name, String publicId, String systemId)
      throws SAXException
    {
      notations = new LinkedList();
      entities = new LinkedList();
      events.add(new DTDImpl(location, null, null, notations, entities));
    }

    public void endDTD()
      throws SAXException
    {
    }

    public void startEntity(String name)
      throws SAXException
    {
      events.add(new StartEntityImpl(location, name));
    }

    public void endEntity(String name)
      throws SAXException
    {
      events.add(new EndEntityImpl(location, name));
    }

    public void startCDATA()
      throws SAXException
    {
      inCDATA = true;
    }

    public void endCDATA()
      throws SAXException
    {
      inCDATA = false;
    }

    public void comment(char[] ch, int start, int length)
      throws SAXException
    {
      events.add(new CommentImpl(location, new String(ch, start, length)));
    }

    public void notationDecl(String name, String publicId, String systemId)
      throws SAXException
    {
      Object n = new NotationDeclarationImpl(location, name, publicId,
                                             systemId);
      notations.add(n);
      //events.add(n);
    }

    public void unparsedEntityDecl(String name, String publicId,
                                   String systemId, String notationName)
      throws SAXException
    {
      Object e = new EntityDeclarationImpl(location, publicId, systemId,
                                           name, notationName,
                                           null, null);
      entities.add(e);
      //events.add(e);
    }

    public void elementDecl(String name, String model)
      throws SAXException
    {
    }

    public void attributeDecl(String eName, String aName, String type,
                              String valueDefault, String value)
      throws SAXException
    {
    }

    public void internalEntityDecl(String name, String value)
      throws SAXException
    {
      Object e = new EntityDeclarationImpl(location, null, null,
                                           name, null, value, null);
      entities.add(e);
      //events.add(e);
    }

    public void externalEntityDecl(String name, String publicId,
                                   String systemId)
      throws SAXException
    {
      Object e = new EntityDeclarationImpl(location, publicId, systemId,
                                           name, null, null, null);
      entities.add(e);
      //events.add(e);
    }

    public void warning(SAXParseException e)
      throws SAXException
    {
      if (reporter != null)
        {
          try
            {
              reporter.report(e.getMessage(), "warning", e, location);
            }
          catch (XMLStreamException e2)
            {
              SAXException e3 = new SAXException(e2.getMessage());
              e3.initCause(e2);
              throw e3;
            }
        }
    }
    
    public void error(SAXParseException e)
      throws SAXException
    {
      if (reporter != null)
        {
          try
            {
              reporter.report(e.getMessage(), "error", e, location);
            }
          catch (XMLStreamException e2)
            {
              SAXException e3 = new SAXException(e2.getMessage());
              e3.initCause(e2);
              throw e3;
            }
        }
    }
    
    public void fatalError(SAXParseException e)
      throws SAXException
    {
      if (reporter != null)
        {
          try
            {
              reporter.report(e.getMessage(), "fatal-error", e, location);
            }
          catch (XMLStreamException e2)
            {
              SAXException e3 = new SAXException(e2.getMessage());
              e3.initCause(e2);
              throw e3;
            }
        }
    }

    public InputSource resolveEntity(String publicId, String systemId)
      throws SAXException, IOException
    {
      if (resolver != null)
        {
          try
            {
              InputStream in = resolver.resolve(systemId);
              if (in != null)
                {
                  InputSource ret = new InputSource(in);
                  ret.setPublicId(publicId);
                  ret.setSystemId(systemId);
                  return ret;
                }
            }
          catch (XMLStreamException e)
            {
              SAXException e2 = new SAXException(e.getMessage());
              e2.initCause(e);
              throw e2;
            }
        }
      return null;
    }
    
  }
  
}