funcdocument.java

来自「java jdk 1.4的源码」· Java 代码 · 共 507 行 · 第 1/2 页

  /**
   * Get the document from the given URI and base
   *
   * @param xctxt The XPath runtime state.
   * @param context The current context node
   * @param uri Relative(?) URI of the document
   * @param base Base to resolve relative URI from.
   *
   * @return The document Node pointing to the document at the given URI
   * or null
   *
   * @throws javax.xml.transform.TransformerException
   */
  int getDoc(XPathContext xctxt, int context, String uri, String base)
          throws javax.xml.transform.TransformerException
  {

    // System.out.println("base: "+base+", uri: "+uri);
    SourceTreeManager treeMgr = xctxt.getSourceTreeManager();
    Source source;
   
    int newDoc;
    try
    {
      source = treeMgr.resolveURI(base, uri, xctxt.getSAXLocator());
      newDoc = treeMgr.getNode(source);
    }
    catch (IOException ioe)
    {
      throw new TransformerException(ioe.getMessage(), 
        (SourceLocator)xctxt.getSAXLocator(), ioe);
    }
    catch(TransformerException te)
    {
      throw new TransformerException(te);
    }

    if (DTM.NULL != newDoc)
      return newDoc;

    // If the uri length is zero, get the uri of the stylesheet.
    if (uri.length() == 0)
    {
      // Hmmm... this seems pretty bogus to me... -sb
      uri = xctxt.getNamespaceContext().getBaseIdentifier();
      try
      {
        source = treeMgr.resolveURI(base, uri, xctxt.getSAXLocator());
      }
      catch (IOException ioe)
      {
        throw new TransformerException(ioe.getMessage(), 
          (SourceLocator)xctxt.getSAXLocator(), ioe);
      }
    }

    String diagnosticsString = null;

    try
    {
      if ((null != uri) && (uri.toString().length() > 0))
      {
        newDoc = treeMgr.getSourceTree(source, xctxt.getSAXLocator(), xctxt);

        // System.out.println("newDoc: "+((Document)newDoc).getDocumentElement().getNodeName());
      }
      else
        warn(xctxt, XSLTErrorResources.WG_CANNOT_MAKE_URL_FROM,
             new Object[]{ ((base == null) ? "" : base) + uri });  //"Can not make URL from: "+((base == null) ? "" : base )+uri);
    }
    catch (Throwable throwable)
    {

      // throwable.printStackTrace();
      newDoc = DTM.NULL;

      // path.warn(XSLTErrorResources.WG_ENCODING_NOT_SUPPORTED_USING_JAVA, new Object[]{((base == null) ? "" : base )+uri}); //"Can not load requested doc: "+((base == null) ? "" : base )+uri);
      while (throwable
             instanceof org.apache.xml.utils.WrappedRuntimeException)
      {
        throwable =
          ((org.apache.xml.utils.WrappedRuntimeException) throwable).getException();
      }

      if ((throwable instanceof NullPointerException)
              || (throwable instanceof ClassCastException))
      {
        throw new org.apache.xml.utils.WrappedRuntimeException(
          (Exception) throwable);
      }

      StringWriter sw = new StringWriter();
      PrintWriter diagnosticsWriter = new PrintWriter(sw);

      if (throwable instanceof TransformerException)
      {
        TransformerException spe = (TransformerException) throwable;

        {
          Throwable e = spe;

          while (null != e)
          {
            if (null != e.getMessage())
            {
              diagnosticsWriter.println(" (" + e.getClass().getName() + "): "
                                        + e.getMessage());
            }

            if (e instanceof TransformerException)
            {
              TransformerException spe2 = (TransformerException) e;

              SourceLocator locator = spe2.getLocator();
              if ((null != locator) && (null != locator.getSystemId()))
                diagnosticsWriter.println("   ID: " + locator.getSystemId()
                                          + " Line #" + locator.getLineNumber()
                                          + " Column #"
                                          + locator.getColumnNumber());

              e = spe2.getException();

              if (e instanceof org.apache.xml.utils.WrappedRuntimeException)
                e = ((org.apache.xml.utils.WrappedRuntimeException) e).getException();
            }
            else
              e = null;
          }
        }
      }
      else
      {
        diagnosticsWriter.println(" (" + throwable.getClass().getName()
                                  + "): " + throwable.getMessage());
      }

      diagnosticsString = throwable.getMessage(); //sw.toString();
    }

    if (DTM.NULL == newDoc)
    {

      // System.out.println("what?: "+base+", uri: "+uri);
      if (null != diagnosticsString)
      {
        warn(xctxt, XSLTErrorResources.WG_CANNOT_LOAD_REQUESTED_DOC,
             new Object[]{ diagnosticsString });  //"Can not load requested doc: "+((base == null) ? "" : base )+uri);
      }
      else
        warn(xctxt, XSLTErrorResources.WG_CANNOT_LOAD_REQUESTED_DOC,
             new Object[]{
               uri == null
               ? ((base == null) ? "" : base) + uri : uri.toString() });  //"Can not load requested doc: "+((base == null) ? "" : base )+uri);
    }
    else
    {
      // %REVIEW%
      // TBD: What to do about XLocator?
      // xctxt.getSourceTreeManager().associateXLocatorToNode(newDoc, url, null);
    }

    return newDoc;
  }

  /**
   * Tell the user of an error, and probably throw an
   * exception.
   *
   * @param xctxt The XPath runtime state.
   * @param msg The error message key
   * @param args Arguments to be used in the error message
   * @throws XSLProcessorException thrown if the active ProblemListener and XPathContext decide
   * the error condition is severe enough to halt processing.
   *
   * @throws javax.xml.transform.TransformerException
   */
  public void error(XPathContext xctxt, String msg, Object args[])
          throws javax.xml.transform.TransformerException
  {

    String formattedMsg = XSLMessages.createMessage(msg, args);
    ErrorListener errHandler = xctxt.getErrorListener();
    TransformerException spe = new TransformerException(formattedMsg,
                              (SourceLocator)xctxt.getSAXLocator());

    if (null != errHandler)
      errHandler.error(spe);
    else
      System.out.println(formattedMsg);
  }

  /**
   * Warn the user of a problem.
   *
   * @param xctxt The XPath runtime state.
   * @param msg Warning message key
   * @param args Arguments to be used in the warning message
   * @throws XSLProcessorException thrown if the active ProblemListener and XPathContext decide
   * the error condition is severe enough to halt processing.
   *
   * @throws javax.xml.transform.TransformerException
   */
  public void warn(XPathContext xctxt, String msg, Object args[])
          throws javax.xml.transform.TransformerException
  {

    String formattedMsg = XSLMessages.createWarning(msg, args);
    ErrorListener errHandler = xctxt.getErrorListener();
    TransformerException spe = new TransformerException(formattedMsg,
                              (SourceLocator)xctxt.getSAXLocator());

    if (null != errHandler)
      errHandler.warning(spe);
    else
      System.out.println(formattedMsg);
  }

 /**
   * Overide the superclass method to allow one or two arguments.
   *
   *
   * @param argNum Number of arguments passed in to this function
   *
   * @throws WrongNumberArgsException
   */
  public void checkNumberArgs(int argNum) throws WrongNumberArgsException
  {
    if ((argNum < 1) || (argNum > 2))
      reportWrongNumberArgs();
  }
  
  /**
   * Constructs and throws a WrongNumberArgException with the appropriate
   * message for this function object.
   *
   * @throws WrongNumberArgsException
   */
  protected void reportWrongNumberArgs() throws WrongNumberArgsException {
      throw new WrongNumberArgsException(XSLMessages.createMessage(XSLTErrorResources.ER_ONE_OR_TWO, null)); //"1 or 2");
  }
  
  /**
   * Tell if the expression is a nodeset expression.  In other words, tell 
   * if you can execute {@link asNode() asNode} without an exception.
   * @return true if the expression can be represented as a nodeset.
   */
  public boolean isNodesetExpr()
  {
    return true;
  }

}