jspparser.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 2,239 行 · 第 1/4 页

      else {
        eltName = JSP_SCRIPTLET;
	addText('-');
      }
      break;

    default:
      eltName = JSP_SCRIPTLET;
      break;
    }

    setLocation(_jspPath, _filename, _lineStart);
    _jspBuilder.startElement(eltName);
    _jspBuilder.endAttributes();

    while (ch >= 0) {
      switch (ch) {
      case '\\':
	addText('\\');
	ch = read();
	if (ch >= 0)
	  addText((char) ch);
	ch = read();
	break;

      case '%':
	ch = read();
	if (ch == '>') {
          createText();
          setLocation();
          _jspBuilder.endElement(eltName.getName());
	  return;
	}
	else if (ch == '\\') {
	  ch = read();
	  if (ch == '>') {
	    addText("%");
	  }
	  else
	    addText("%\\");
	}
	else
	  addText('%');
	break;

      default:
	addText((char) ch);
	ch = read();
	break;
      }
    }

    createText();    
    setLocation();
    _jspBuilder.endElement(eltName.getName());
  }

  /**
   * Parses the JSP directive syntax.
   */
  private void parseDirective()
    throws IOException, JspParseException
  {
    String language = null;

    int ch = skipWhitespace(read());
    String directive = "";
    if (XmlChar.isNameStart(ch)) {
      ch = readName(ch);
      directive = _tag.toString();
    }
    else
      throw error(L.l("Expected jsp directive name at '{0}'.  JSP directive syntax is <%@ name attr1='value1' ... %>",
                      badChar(ch)));

    QName qname;

    if (directive.equals("page"))
      qname = JSP_DIRECTIVE_PAGE;
    else if (directive.equals("include"))
      qname = JSP_DIRECTIVE_INCLUDE;
    else if (directive.equals("taglib"))
      qname = JSP_DIRECTIVE_TAGLIB;
    else if (directive.equals("cache"))
      qname = JSP_DIRECTIVE_CACHE;
    else if (directive.equals("attribute"))
      qname = JSP_DIRECTIVE_ATTRIBUTE;
    else if (directive.equals("variable"))
      qname = JSP_DIRECTIVE_VARIABLE;
    else if (directive.equals("tag"))
      qname = JSP_DIRECTIVE_TAG;
    else
      throw error(L.l("'{0}' is an unknown jsp directive.  Only <%@ page ... %>, <%@ include ... %>, <%@ taglib ... %>, and <%@ cache ... %> are known.", directive));

    unread(ch);
    
    ArrayList<QName> keys = new ArrayList<QName>();
    ArrayList<String> values = new ArrayList<String>();

    parseAttributes(keys, values);

    ch = skipWhitespace(read());

    if (ch != '%' || (ch = read()) != '>') {
      throw error(L.l("expected '%>' at {0}.  JSP directive syntax is '<%@ name attr1='value1' ... %>'.  (Started at line {1})",
                      badChar(ch), _lineStart));
    }

    setLocation(_jspPath, _filename, _lineStart);
    _lineStart = _line;
    _jspBuilder.startElement(qname);

    for (int i = 0; i < keys.size(); i++) {
      _jspBuilder.attribute(keys.get(i), values.get(i));
    }
    _jspBuilder.endAttributes();
  
    if (qname.equals(JSP_DIRECTIVE_TAGLIB))
      processTaglibDirective(keys, values);

    setLocation();
    _jspBuilder.endElement(qname.getName());

    if (qname.equals(JSP_DIRECTIVE_PAGE)
	|| qname.equals(JSP_DIRECTIVE_TAG)) {
      String contentEncoding = _parseState.getPageEncoding();
      if (contentEncoding == null)
        contentEncoding = _parseState.getCharEncoding();

      if (contentEncoding != null) {
        try {
          _stream.setEncoding(contentEncoding);
        } catch (Exception e) {
	  log.log(Level.FINER, e.toString(), e);
	  
          throw error(L.l("unknown content encoding '{0}'", contentEncoding),
		      e);
        }
      }
    }
    /*
    if (directive.equals("include"))
      parseIncludeDirective(elt);
    else if (directive.equals("taglib"))
      parseTaglibDirective(elt);
    */
  }

  /**
   * Parses an XML comment.
   */
  private void parseComment()
    throws IOException, JspParseException
  {
    int ch = read();

    while (ch >= 0) {
      if (ch == '-') {
	ch = read();
	while (ch == '-') {
	  if ((ch = read()) == '-')
	    continue;
	  else if (ch == '%' && (ch = read()) == '>')
	    return;
	  else if (ch == '-')
	    ch = read();
	}
      }
      else
	ch = read();
    }
  }
  
  private void parseXmlComment()
    throws IOException, JspParseException
  {
    int ch;
    
    while ((ch = read()) >= 0) {
      while (ch == '-') {
        if ((ch = read()) == '-' && (ch = read()) == '>')
          return;
      }
    }
  }

  /**
   * Parses the open tag.
   */
  private void parseOpenTag(String name, int ch, boolean isXml)
    throws IOException, JspParseException
  {
    addText();

    ch = skipWhitespace(ch);

    ArrayList<QName> keys = new ArrayList<QName>();
    ArrayList<String> values = new ArrayList<String>();

    unread(ch);

    parseAttributes(keys, values);

    QName qname = getElementQName(name);

    setLocation(_jspPath, _filename, _lineStart);
    _lineStart = _line;

    _jspBuilder.startElement(qname);

    for (int i = 0; i < keys.size(); i++) {
      QName key = keys.get(i);
      String value = values.get(i);
      
      _jspBuilder.attribute(key, value);
    }

    _jspBuilder.endAttributes();
    
    if (qname.equals(JSP_DIRECTIVE_TAGLIB))
      processTaglibDirective(keys, values);
    
    ch = skipWhitespace(read());

    JspNode node = _jspBuilder.getCurrentNode();

    if (ch == '/') {
      if ((ch = read()) != '>')
	throw error(L.l("expected '/>' at '{0}' (for tag '<{1}>' at line {2}).  The XML empty tag syntax is: <tag attr1='value1'/>",
                        badChar(ch), name, String.valueOf(_lineStart)));
      
      setLocation();
      _jspBuilder.endElement(qname.getName());
    }
    else if (ch != '>')
      throw error(L.l("expected '>' at '{0}' (for tag '<{1}>' at line {2}).  The XML tag syntax is: <tag attr1='value1'>",
                      badChar(ch), name, String.valueOf(_lineStart)));
    // If tagdependent and not XML mode, then read the raw text.
    else if ("tagdependent".equals(node.getBodyContent()) && ! _isXml) {
      String tail = "</" + name + ">";
      for (ch = read(); ch >= 0; ch = read()) {
	_text.append((char) ch);
	if (_text.endsWith(tail)) {
	  _text.setLength(_text.length() - tail.length());
	  addText();
          _jspBuilder.endElement(qname.getName());
	  return;
        }
      }
      throw error(L.l("expected '{0}' at end of file (for tag <{1}> at line {2}).  Tags with 'tagdependent' content need close tags.",
                      tail, String.valueOf(_lineStart)));
    }
  }

  /**
   * Returns the full QName for the JSP page's name.
   */
  private QName getElementQName(String name)
  {
    int p = name.lastIndexOf(':');

    if (p > 0) {
      String prefix = name.substring(0, p);
      String url = Namespace.find(_namespaces, prefix);

      _prefixes.add(prefix);

      if (url != null)
        return new QName(prefix, name.substring(p + 1), url);
      else
        return new QName("", name, "");
    }
    else {
      String url = Namespace.find(_namespaces, "");

      if (url != null)
        return new QName("", name, url);
      else
        return new QName("", name, "");
    }
  }

  /**
   * Returns the full QName for the JSP page's name.
   */
  private QName getAttributeQName(String name)
  {
    int p = name.lastIndexOf(':');

    if (p > 0) {
      String prefix = name.substring(0, p);
      String url = Namespace.find(_namespaces, prefix);

      if (url != null)
        return new QName(prefix, name.substring(p + 1), url);
      else
        return new QName("", name, "");
    }
    else
      return new QName("", name, "");
  }

  /**
   * Parses the attributes of an element.
   */
  private void parseAttributes(ArrayList<QName> names,
                               ArrayList<String> values)
    throws IOException, JspParseException
  {
    names.clear();
    values.clear();

    int ch = skipWhitespace(read());

    while (XmlChar.isNameStart(ch)) {
      ch = readName(ch);
      String key = _tag.toString();

      readValue(key, ch, _isXml);
      String value = _value.toString(); 

      if (key.startsWith("xmlns:")) {
        String prefix = key.substring(6);

	_jspBuilder.startPrefixMapping(prefix, value);
	//_parseState.pushNamespace(prefix, value);
        _namespaces = new Namespace(_namespaces, prefix, value);
      }
      else if (key.equals("xmlns")) {
	_jspBuilder.startPrefixMapping("", value);
	//_parseState.pushNamespace(prefix, value);
	//_parseState.pushNamespace("", value);
        _namespaces = new Namespace(_namespaces, "", value);
      }
      else {
        names.add(getAttributeQName(key));
        values.add(value);
      }
      
      ch = skipWhitespace(read());
    }

    unread(ch);
  }
  
  /**
   * Reads an attribute value.
   */
  private void readValue(String attribute, int ch, boolean isXml)
    throws IOException, JspParseException
  {
    boolean isRuntimeAttribute = false;
    
    _value.clear();

    ch = skipWhitespace(ch);

    if (ch != '=') {
      unread(ch);
      return;
    }

    ch = skipWhitespace(read());

    if (ch != '\'' && ch != '"') {
      if (XmlChar.isNameChar(ch)) {
        ch = readName(ch);

        throw error(L.l("'{0}' attribute value must be quoted at '{1}'.  JSP attribute syntax is either attr=\"value\" or attr='value'.",
                        attribute, _tag));
      }
      else
        throw error(L.l("'{0}' attribute value must be quoted at '{1}'.  JSP attribute syntax is either attr=\"value\" or attr='value'.",
                        attribute, badChar(ch)));
    }

    int end = ch;
    int lastCh = 0;

    ch = read();
    if (ch != '<') {
    }
    else if ((ch = read()) != '%')
      _value.append('<');
    else if ((ch = read()) != '=')
      _value.append("<%");
    else {
      _value.append("<%");
      isRuntimeAttribute = true;
    }

    while (ch != -1 && (ch != end || isRuntimeAttribute)) {
      if (ch == '\\') {
        switch ((ch = read())) {
        case '\\':
        case '\'':
        case '\"':
	  // jsp/1505 vs jsp/184s
	  // _value.append('\\');
          _value.append((char) ch);
          ch = read();
          break;

        case '>':
          if (lastCh == '%') {
            _value.append('>');
            ch = read();
          }
          else
            _value.append('\\');
          break;

        case '%':
          if (lastCh == '<') {
            _value.append('%');
            ch = read();
          }
          else
            _value.append('\\');
          break;

        default:
          _value.append('\\');
          break;
        }
      }
      else if (ch == '%' && isRuntimeAttribute) {
        _value.append('%');
        ch = read();
        if (ch == '>')
          isRuntimeAttribute = false;
      }
      else if (ch == '&' && isXml) {
        lastCh = -1;
        _value.append((char) parseEntity());
        ch = read();
      }
      else if (ch == '&') {
        if ((ch = read()) == 'a') {
          if ((ch = read()) != 'p')
            _value.append("&a");
          else if ((ch = read()) != 'o')
            _value.append("&ap");
          else if ((ch = read()) != 's')
            _value.append("&apo");
          else if ((ch = read()) != ';')
            _value.append("&apos");
          else {
            _value.append('\'');
            ch = read();
          }
        }
        else if (ch == 'q') {
          if ((ch = read()) != 'u')
            _value.append("&q");
          else if ((ch = read()) != 'o')
            _value.append("&qu");
          else if ((ch = read()) != 't')
            _value.append("&quo");
          else if ((ch = read()) != ';')
            _value.append("&quot");
          else {
            _value.append('"');
            ch = read();
          }
        }
        else
          _value.append('&');
      }
      else {
        _value.append((char) ch);
        lastCh = ch;
        ch = read();
      }
    }
  }

  /**
   * Parses an XML entity.
   */
  int parseEntity()
    throws IOException, JspParseException
  {
    int ch = read();

    if (_isXml && ch == '#') {
      int value = 0;

      for (ch = read(); ch >= '0' && ch <= '9'; ch = read())
        value = 10 * value + ch - '0';

      if (ch != ';')
        throw error(L.l("expected ';' at '{0}' in character entity.  The XML character entities syntax is &#nn;",
                        badChar(ch)));

      return (char) value;
    }

    CharBuffer cb = CharBuffer.allocate();
    for (; ch >= 'a' && ch <= 'z'; ch = read())
      cb.append((char) ch);

    if (ch != ';') {
      
      log.warning(L.l("expected ';' at '{0}' in entity '&{1}'.  The XML entity syntax is &name;",
                      badChar(ch), cb));
    }

    String entity = cb.close();
    if (entity.equals("lt"))
      return '<';
    else if (entity.equals("gt"))
      return '>';
    else if (entity.equals("amp"))
      return '&';
    else if (entity.equals("apos"))
      return '\'';
    else if (entity.equals("quot"))
      return '"';
    else
      throw error(L.l("unknown entity '&{0};'.  XML only recognizes the special entities &lt;, &gt;, &amp;, &apos; and &quot;", entity));
  }

  private int parseCloseTag()
    throws IOException, JspParseException
  {
    int ch;

    if (! XmlChar.isNameStart(ch = read())) {
      addText("</");
      return ch;
    }
    
    ch = readName(ch);
    String name = _tag.toString();
    if (! _isXml && getTag(name) == TAG_UNKNOWN) {
      addText("</");
      addText(name);
      return ch;
    }

    ch = skipWhitespace(ch);
    if (ch != '>')
      throw error(L.l("expected '>' at {0}.  The XML close tag syntax is </name>.", badChar(ch)));

    JspNode node = _jspBuilder.getCurrentNode();
    String nodeName = node.getTagName();
    if (nodeName.equals(name)) {
    }
    else if (nodeName.equals("resin-c:when")) {
      throw error(L.l("#if expects closing #end before </{0}> (#if at {1}).  #if statements require #end before the enclosing tag closes.",
                      name, String.valueOf(node.getStartLine())));
    }
    else if (nodeName.equals("resin-c:otherwise")) {
      throw error(L.l("#else expects closing #end before </{0}> (#else at {1}).  #if statements require #end before the enclosing tag closes.",
                      name, String.valueOf(node.getStartLine())));
    }
    else {
      throw error(L.l("expected </{0}> at </{1}>.  Closing tags must match opened tags.",
                      nodeName, name));