stylesheet.java

gcc的组建

        else if (c == '}')
          {
            if (i < (len - 1) && value.charAt(i + 1) == '}')
              {
                tokens.add(value.substring(off, i + 1));
                types.add(Boolean.FALSE);
                i++;
                off = i + 1;
                continue;
              }
            if (depth == 1)
              {
                if (i - off > 0)
                  {
                    tokens.add(value.substring(off, i));
                    types.add(Boolean.TRUE);
                  }
                else
                  {
                    String msg = "attribute value template " +
                      "must contain expression: " + value;
                    DOMSourceLocator l = new DOMSourceLocator(source);
                    throw new TransformerConfigurationException(msg, l);
                  }
                off = i + 1;
              }
            depth--;
          }
      }
    if (depth > 0)
      {
        String msg = "invalid attribute value template: " + value;
        throw new TransformerConfigurationException(msg);
      }
    if (len - off > 0)
      {
        // Trailing text
        tokens.add(value.substring(off));
        types.add(Boolean.FALSE);
      }
    
    // Construct template node tree
    TemplateNode ret = null;
    Document doc = source.getOwnerDocument();
    len = tokens.size();
    for (int i = len - 1; i >= 0; i--)
      {
        String token = (String) tokens.get(i);
        Boolean type = (Boolean) types.get(i);
        if (type == Boolean.TRUE)
          {
            // Expression text
            Expr select = (Expr) xpath.compile(token);
            TemplateNode ret2 = new ValueOfNode(select, false);
            ret2.next = ret;
            ret = ret2;
          }
        else
          {
            // Verbatim text
            TemplateNode ret2 = new LiteralNode(doc.createTextNode(token));
            ret2.next = ret;
            ret = ret2;
          }
      }
    return ret;
  }

  boolean isPreserved(Text text)
    throws TransformerConfigurationException
  {
    // Check characters in text
    String value = text.getData();
    if (value != null)
      {
        int len = value.length();
        for (int i = 0; i < len; i++)
          {
            char c = value.charAt(i);
            if (c != 0x20 && c != 0x09 && c != 0x0a && c != 0x0d)
              {
                return true;
              }
          }
      }
    // Check parent node
    Node ctx = text.getParentNode();
    if (!preserveSpace.isEmpty())
      {
        for (Iterator i = preserveSpace.iterator(); i.hasNext(); )
          {
            NameTest preserveTest = (NameTest) i.next();
            if (preserveTest.matches(ctx, 1, 1))
              {
                boolean override = false;
                if (!stripSpace.isEmpty())
                  {
                    for (Iterator j = stripSpace.iterator(); j.hasNext(); )
                      {
                        NameTest stripTest = (NameTest) j.next();
                        if (stripTest.matches(ctx, 1, 1))
                          {
                            override = true;
                            break;
                          }
                      }
                  }
                if (!override)
                  {
                    return true;
                  }
              }
          }
      }
    // Check whether any ancestor specified xml:space
    while (ctx != null)
      {
        if (ctx.getNodeType() == Node.ELEMENT_NODE)
          {
            Element element = (Element) ctx;
            String xmlSpace = element.getAttribute("xml:space");
            if ("default".equals(xmlSpace))
              {
                break;
              }
            else if ("preserve".equals(xmlSpace))
              {
                return true;
              }
            else if (xmlSpace.length() > 0)
              {
                String msg = "Illegal value for xml:space: " + xmlSpace;
                throw new TransformerConfigurationException(msg);
              }
            else if ("text".equals(ctx.getLocalName()) &&
                     XSL_NS.equals(ctx.getNamespaceURI()))
              {
                // xsl:text implies xml:space='preserve'
                return true;
              }
          }
        ctx = ctx.getParentNode();
      }
    return false;
  }

  public XPathFunction resolveFunction(QName name, int arity)
  {
    String uri = name.getNamespaceURI();
    if (XSL_NS.equals(uri) || uri == null || uri.length() == 0)
      {
        String localName = name.getLocalPart();
        if ("document".equals(localName) && (arity == 1 || arity == 2))
          {
            if (current == null)
              {
                throw new RuntimeException("current is null");
              }
            return new DocumentFunction(getRootStylesheet(), current);
          }
        else if ("key".equals(localName) && (arity == 2))
          {
            return new KeyFunction(getRootStylesheet());
          }
        else if ("format-number".equals(localName) &&
                 (arity == 2 || arity == 3))
          {
            return new FormatNumberFunction(getRootStylesheet());
          }
        else if ("current".equals(localName) && (arity == 0))
          {
            return new CurrentFunction(getRootStylesheet());
          }
        else if ("unparsed-entity-uri".equals(localName) && (arity == 1))
          {
            return new UnparsedEntityUriFunction();
          }
        else if ("generate-id".equals(localName) &&
                 (arity == 1 || arity == 0))
          {
            return new GenerateIdFunction();
          }
        else if ("system-property".equals(localName) && (arity == 1))
          {
            return new SystemPropertyFunction();
          }
        else if ("element-available".equals(localName) && (arity == 1))
          {
            return new ElementAvailableFunction(this);
          }
        else if ("function-available".equals(localName) && (arity == 1))
          {
            return new FunctionAvailableFunction(this);
          }
      }
    return null;
  }
  
  // -- Parsing --

  /**
   * apply-templates
   */
  final TemplateNode parseApplyTemplates(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String m = getAttribute(attrs, "mode");
    QName mode = (m == null) ? null : getQName(m);
    String s = getAttribute(attrs, "select");
    if (s == null)
      {
        s = "child::node()";
      }
    Node children = node.getFirstChild();
    List sortKeys = parseSortKeys(children);
    List withParams = parseWithParams(children);
    Expr select = (Expr) xpath.compile(s);
    return new ApplyTemplatesNode(select, mode,
                                  sortKeys, withParams, false);
  }

  /**
   * call-template
   */
  final TemplateNode parseCallTemplate(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String n = getRequiredAttribute(attrs, "name", node);
    QName name = getQName(n);
    Node children = node.getFirstChild();
    List withParams = parseWithParams(children);
    return new CallTemplateNode(name, withParams);
  }
  
  /**
   * value-of
   */
  final TemplateNode parseValueOf(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String s = getRequiredAttribute(attrs, "select", node);
    String doe = getAttribute(attrs, "disable-output-escaping");
    boolean d = "yes".equals(doe);
    Expr select = (Expr) xpath.compile(s);
    return new ValueOfNode(select, d);
  }
  
  /**
   * for-each
   */
  final TemplateNode parseForEach(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String s = getRequiredAttribute(attrs, "select", node);
    Node children = node.getFirstChild();
    List sortKeys = parseSortKeys(children);
    Expr select = (Expr) xpath.compile(s);
    ForEachNode ret = new ForEachNode(select, sortKeys);
    ret.children = parse(children);
    return ret;
  }
  
  /**
   * if
   */
  final TemplateNode parseIf(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String t = getRequiredAttribute(attrs, "test", node);
    Expr test = (Expr) xpath.compile(t);
    Node children = node.getFirstChild();
    IfNode ret = new IfNode(test);
    ret.children = parse(children);
    return ret;
  }
  
  /**
   * when
   */
  final TemplateNode parseWhen(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String t = getRequiredAttribute(attrs, "test", node);
    Expr test = (Expr) xpath.compile(t);
    Node children = node.getFirstChild();
    WhenNode ret = new WhenNode(test);
    ret.children = parse(children);
    return ret;
  }
  
  /**
   * element
   */
  final TemplateNode parseElement(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String name = getRequiredAttribute(attrs, "name", node);
    String namespace = getAttribute(attrs, "namespace");
    String uas = getAttribute(attrs, "use-attribute-sets");
    TemplateNode n = parseAttributeValueTemplate(name, node);
    TemplateNode ns = (namespace == null) ? null :
      parseAttributeValueTemplate(namespace, node);
    Node children = node.getFirstChild();
    ElementNode ret = new ElementNode(n, ns, uas, node);
    ret.children = parse(children);
    return ret;
  }

  /**
   * attribute
   */
  final TemplateNode parseAttribute(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String name = getRequiredAttribute(attrs, "name", node);
    String namespace = getAttribute(attrs, "namespace");
    TemplateNode n = parseAttributeValueTemplate(name, node);
    TemplateNode ns = (namespace == null) ? null :
      parseAttributeValueTemplate(namespace, node);
    Node children = node.getFirstChild();
    AttributeNode ret = new AttributeNode(n, ns, node);
    ret.children = parse(children);
    return ret;
  }
  
  /**
   * text
   */
  final TemplateNode parseText(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String doe = getAttribute(attrs, "disable-output-escaping");
    boolean d = "yes".equals(doe);
    Node children = node.getFirstChild();
    TextNode ret = new TextNode(d);
    ret.children = parse(children);
    return ret;
  }
  
  /**
   * copy
   */
  final TemplateNode parseCopy(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String uas = getAttribute(attrs, "use-attribute-sets");
    Node children = node.getFirstChild();
    CopyNode ret = new CopyNode(uas);
    ret.children = parse(children);
    return ret;
  }
  
  /**
   * processing-instruction
   */
  final TemplateNode parseProcessingInstruction(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String name = getRequiredAttribute(attrs, "name", node);
    Node children = node.getFirstChild();
    ProcessingInstructionNode ret = new ProcessingInstructionNode(name);
    ret.children = parse(children);
    return ret;
  }
  
  /**
   * number
   */
  final TemplateNode parseNumber(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String v = getAttribute(attrs, "value");
    String ff = getAttribute(attrs, "format");
    if (ff == null)
      {
        ff = "1";
      }
    TemplateNode format = parseAttributeValueTemplate(ff, node);
    String lang = getAttribute(attrs, "lang");
    String lv = getAttribute(attrs, "letter-value");
    int letterValue = "traditional".equals(lv) ?
      AbstractNumberNode.TRADITIONAL :
      AbstractNumberNode.ALPHABETIC;
    String gs = getAttribute(attrs, "grouping-separator");
    String gz = getAttribute(attrs, "grouping-size");
    int gz2 = (gz != null && gz.length() > 0) ?
      Integer.parseInt(gz) : 1;
    Node children = node.getFirstChild();
    TemplateNode ret;
    if (v != null && v.length() > 0)
      {
        Expr value = (Expr) xpath.compile(v);
        ret = new NumberNode(value, format, lang,
                             letterValue, gs, gz2);
      }
    else
      {
        String l = getAttribute(attrs, "level");
        int level =
          "multiple".equals(l) ? NodeNumberNode.MULTIPLE :
                      "any".equals(l) ? NodeNumberNode.ANY :
                      NodeNumberNode.SINGLE;
        String c = getAttribute(attrs, "count");
        String f = getAttribute(attrs, "from");
        Pattern count = null;
        Pattern from = null;
        if (c != null)
          {
            try
              {
                count = (Pattern) xpath.compile(c);
              }
            catch (ClassCastException e)
              {
                String msg = "invalid pattern: " + c;
                throw new TransformerConfigurationException(msg);
              }
          }
        if (f != null)
          {
            try
              {
                from = (Pattern) xpath.compile(f);
              }
            catch (ClassCastException e)
              {
                String msg = "invalid pattern: " + f;
                throw new TransformerConfigurationException(msg);
              }
          }
        ret = new NodeNumberNode(level, count, from,
                                 format, lang,
                                 letterValue, gs, gz2);
      }
    ret.children = parse(children);
    return ret;
  }
  
  /**
   * copy-of
   */
  final TemplateNode parseCopyOf(Node node)
    throws TransformerConfigurationException, XPathExpressionException
  {
    NamedNodeMap attrs = node.getAttributes();
    String s = getRequiredAttribute(attrs, "select", node);
    Expr select = (Expr) xpath.compile(s);