outputproperties.java

来自「java jdk 1.4的源码」· Java 代码 · 共 1,123 行 · 第 1/3 页

  public void setQNameProperties(QName key, Vector v)
  {
    setQNameProperties(key.toNamespacedString(), v);
  }

  /**
   * Set an output property with a QName list value.  The QNames will be turned
   * into strings with the namespace in curly brackets.
   *
   * @param key the key to be placed into the property list.
   * @param v non-null list of QNames corresponding to <tt>key</tt>.
   * @see javax.xml.transform.OutputKeys
   */
  public void setQNameProperties(String key, Vector v)
  {

    int s = v.size();

    // Just an initial guess at reasonable tuning parameters
    FastStringBuffer fsb = new FastStringBuffer(9,9);

    for (int i = 0; i < s; i++)
    {
      QName qname = (QName) v.elementAt(i);

      fsb.append(qname.toNamespacedString());
      // Don't append space after last value
      if (i < s-1) 
        fsb.append(' ');
    }

    m_properties.put(key, fsb.toString());
  }

  /**
   * Searches for the list of qname properties with the specified key in
   * the property list.
   * If the key is not found in this property list, the default property list,
   * and its defaults, recursively, are then checked. The method returns
   * <code>null</code> if the property is not found.
   *
   * @param   key   the property key.
   * @return  the value in this property list as a vector of QNames, or false
   * if null or not "yes".
   */
  public Vector getQNameProperties(QName key)
  {
    return getQNameProperties(key.toNamespacedString());
  }

  /**
   * Searches for the list of qname properties with the specified key in
   * the property list.
   * If the key is not found in this property list, the default property list,
   * and its defaults, recursively, are then checked. The method returns
   * <code>null</code> if the property is not found.
   *
   * @param   key   the property key.
   * @return  the value in this property list as a vector of QNames, or false
   * if null or not "yes".
   */
  public Vector getQNameProperties(String key)
  {
    return getQNameProperties(key, m_properties);
  }

  /**
   * Searches for the list of qname properties with the specified key in
   * the property list.
   * If the key is not found in this property list, the default property list,
   * and its defaults, recursively, are then checked. The method returns
   * <code>null</code> if the property is not found.
   *
   * @param   key   the property key.
   * @param props the list of properties to search in.
   * @return  the value in this property list as a vector of QNames, or false
   * if null or not "yes".
   */
  public static Vector getQNameProperties(String key, Properties props)
  {

    String s = props.getProperty(key);

    if (null != s)
    {
      Vector v = new Vector();
      int l = s.length();
      boolean inCurly = false;
      FastStringBuffer buf = new FastStringBuffer();

      // parse through string, breaking on whitespaces.  I do this instead 
      // of a tokenizer so I can track whitespace inside of curly brackets, 
      // which theoretically shouldn't happen if they contain legal URLs.
      for (int i = 0; i < l; i++)
      {
        char c = s.charAt(i);

        if (Character.isWhitespace(c))
        {
          if (!inCurly)
          {
            if (buf.length() > 0)
            {
              QName qname = QName.getQNameFromString(buf.toString());
              v.addElement(qname);
              buf.reset();
            }
            continue;
          }
        }
        else if ('{' == c)
          inCurly = true;
        else if ('}' == c)
          inCurly = false;

        buf.append(c);
      }

      if (buf.length() > 0)
      {
        QName qname = QName.getQNameFromString(buf.toString());
        v.addElement(qname);
        buf.reset();
      }

      return v;
    }
    else
      return null;
  }

  /**
   * This function is called to recompose all of the output format extended elements.
   *
   * @param root non-null reference to the stylesheet root object.
   */
  public void recompose(StylesheetRoot root)
    throws TransformerException
  {
    root.recomposeOutput(this);
  }

  /**
   * This function is called after everything else has been
   * recomposed, and allows the template to set remaining
   * values that may be based on some other property that
   * depends on recomposition.
   */
  public void compose(StylesheetRoot sroot) throws TransformerException
  {

    super.compose(sroot);

    m_propertiesLevels = null;
  }

  /**
   * Get the Properties object that this class wraps.
   *
   * @return non-null reference to Properties object.
   */
  public Properties getProperties()
  {
    return m_properties;
  }
  
  /**
   * Copy the keys and values from the source to this object.  This will
   * not copy the default values.  This is meant to be used by going from
   * a higher precedence object to a lower precedence object, so that if a
   * key already exists, this method will not reset it.
   *
   * @param src non-null reference to the source properties.
   */
  public void copyFrom(Properties src)
  {
    copyFrom(src, true);
  }

  /**
   * Copy the keys and values from the source to this object.  This will
   * not copy the default values.  This is meant to be used by going from
   * a higher precedence object to a lower precedence object, so that if a
   * key already exists, this method will not reset it.
   *
   * @param src non-null reference to the source properties.
   * @param shouldResetDefaults true if the defaults should be reset based on 
   *                            the method property.
   */
  public void copyFrom(Properties src, boolean shouldResetDefaults)
  {

    Enumeration enum = src.keys();

    while (enum.hasMoreElements())
    {
      String key = (String) enum.nextElement();
    
      if (!isLegalPropertyKey(key))
        throw new IllegalArgumentException(XSLMessages.createMessage(XSLTErrorResources.ER_OUTPUT_PROPERTY_NOT_RECOGNIZED, new Object[]{key})); //"output property not recognized: "
      
      Object oldValue = m_properties.get(key);
      if (null == oldValue)
      {
        String val = (String) src.get(key);
        
        if(shouldResetDefaults && key.equals(OutputKeys.METHOD))
        {
          setMethodDefaults(val);
        }

        m_properties.put(key, val);
      }
      else if (key.equals(OutputKeys.CDATA_SECTION_ELEMENTS))
      {
        m_properties.put(key, (String) oldValue + " " + (String) src.get(key));
      }
    }
  }

  /**
   * Copy the keys and values from the source to this object.  This will
   * not copy the default values.  This is meant to be used by going from
   * a higher precedence object to a lower precedence object, so that if a
   * key already exists, this method will not reset it.
   *
   * @param opsrc non-null reference to an OutputProperties.
   */
  public void copyFrom(OutputProperties opsrc)
    throws TransformerException
  {
    checkDuplicates(opsrc);
    copyFrom(opsrc.getProperties());
  }

  /**
   * Check to see if a set of properties is at the same import level as the
   * last set of properties set that was passed as an argument to this method.
   * This operation assumes that the OutputProperties are being called
   * from most important to least important, in document order.
   *
   * @param newProps non-null reference to OutputProperties that is about to
   *                 be added to this set.
   */
  private void checkDuplicates(OutputProperties newProps)
    throws TransformerException
  {

    if (null == m_propertiesLevels)
      m_propertiesLevels = new Hashtable();

    // This operation assumes that the OutputProperties are being called 
    // from most important to least important, in reverse document order.

    int newPrecedence = newProps.getStylesheetComposed().getImportCountComposed();

    Properties p = newProps.getProperties();
    Enumeration enum = p.keys();

    while (enum.hasMoreElements())
    {
      String key = (String) enum.nextElement();

      if (key.equals(OutputKeys.CDATA_SECTION_ELEMENTS))
        continue;

      // Do we already have this property? Call hashtable operation, 
      // since we don't want to look at default properties.
      Integer oldPrecedence = (Integer) m_propertiesLevels.get(key);
      if (null == oldPrecedence)
      {
        m_propertiesLevels.put(key, new Integer(newPrecedence));
      }
      else if (newPrecedence >= oldPrecedence.intValue())
      {
        String oldValue = (String) this.m_properties.get(key);
        String newValue = (String) newProps.m_properties.get(key);
        if ( ((oldValue == null) && (newValue != null)) || !oldValue.equals(newValue) )
        {
          String msg = key + " can not be multiply defined at the same "
                       + "import level! Old value = " 
                       + oldValue + "; New value = " + newValue;
          throw new TransformerException(msg, newProps);
        }
      }
    }
}

  /**
   * Report if the key given as an argument is a legal xsl:output key.
   *
   * @param key non-null reference to key name.
   *
   * @return true if key is legal.
   */
  public boolean isLegalPropertyKey(String key)
  {

    return (key.equals(OutputKeys.CDATA_SECTION_ELEMENTS)
            || key.equals(OutputKeys.DOCTYPE_PUBLIC)
            || key.equals(OutputKeys.DOCTYPE_SYSTEM)
            || key.equals(OutputKeys.ENCODING)
            || key.equals(OutputKeys.INDENT)
            || key.equals(OutputKeys.MEDIA_TYPE)
            || key.equals(OutputKeys.METHOD)
            || key.equals(OutputKeys.OMIT_XML_DECLARATION)
            || key.equals(OutputKeys.STANDALONE)
            || key.equals(OutputKeys.VERSION)
            || (key.length() > 0) && (key.charAt(0) == '{'));
  }

  /**
   *  This ugly field is used during recomposition to track the import precedence
   *  at which each attribute was first specified, so we can flag errors about values being
   *  set multiple time at the same precedence level. Note that this field is only used
   *  during recomposition, with the OutputProperties object owned by the
   *  {@link org.apache.xalan.templates.StylesheetRoot} object.
   */
  private transient Hashtable m_propertiesLevels;

  /** The output properties.
   *  @serial */
  private Properties m_properties = null;

  // Some special Xalan keys.

  /** The number of whitespaces to indent by, if indent="yes". */
  public static String S_KEY_INDENT_AMOUNT =
    S_BUILTIN_EXTENSIONS_UNIVERSAL+"indent-amount";

  /**
   * Fully qualified name of class with a default constructor that
   *  implements the ContentHandler interface, where the result tree events
   *  will be sent to.      
   */
  public static String S_KEY_CONTENT_HANDLER =
    S_BUILTIN_EXTENSIONS_UNIVERSAL+"content-handler";

  /** File name of file that specifies character to entity reference mappings. */
  public static String S_KEY_ENTITIES =
    S_BUILTIN_EXTENSIONS_UNIVERSAL+"entities";

  /** Use a value of "yes" if the href values for HTML serialization should 
   *  use %xx escaping. */
  public static String S_USE_URL_ESCAPING =
    S_BUILTIN_EXTENSIONS_UNIVERSAL+"use-url-escaping";

  /** Use a value of "yes" if the META tag should be omitted where it would
   *  otherwise be supplied.
   */
  public static String S_OMIT_META_TAG =
    S_BUILTIN_EXTENSIONS_UNIVERSAL+"omit-meta-tag";

  /** The default properties of all output files. */
  private static Properties m_xml_properties = null;

  /** The default properties when method="html". */
  private static Properties m_html_properties = null;

  /** The default properties when method="text". */
  private static Properties m_text_properties = null;

  /** Synchronization object for lazy initialization of the above tables. */
  private static Integer m_synch_object = new Integer(1);

  /** a zero length Class array used in loadPropertiesFile() */
  private static final Class[] NO_CLASSES = new Class[0];

  /** a zero length Object array used in loadPropertiesFile() */
  private static final Object[] NO_OBJS = new Object[0];

}