configcontext.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 1,406 行 · 第 1/3 页

    else if (node instanceof Element) {
      NamedNodeMap attrList = node.getAttributes();
      if (attrList != null) {
        for (int i = 0; i < attrList.getLength(); i++) {
          if (! attrList.item(i).getNodeName().startsWith("xml"))
            return true;
        }
      }
    }

    for (ptr = node.getFirstChild(); ptr != null; ptr = ptr.getNextSibling()) {
      if (ptr instanceof Element)
	return true;
    }

    return false;
  }

  static String getValue(QName name, Node node, String defaultValue)
  {
    /*
    NamedNodeMap attrList = node.getAttributes();
    if (attrList != null) {
      for (int i = 0; i < attrList.getLength(); i++) {
	if (attrList.item(i).getNodeName().equals(name.getName()))
	  return attrList.item(i).getNodeValue();
      }
    }
    */

    if (node instanceof Element) {
      String value = ((Element) node).getAttribute(name.getName());

      if (! "".equals(value))
        return value;
    }

    Node ptr;

    for (ptr = node.getFirstChild(); ptr != null; ptr = ptr.getNextSibling()) {
      QName qName = ((QAbstractNode) ptr).getQName();

      if (name.equals(qName))
	return textValue(ptr);
    }

    return defaultValue;
  }

  /**
   * Returns the text value of the node.
   */
  Object getELValue(Attribute attr, Node node)
  {
    if (node instanceof Attr) {
      Attr attrNode = (Attr) node;
      String data = attrNode.getNodeValue();

      // server/12h6
      if (data != null && isEL() && attr.isEL()
	  && (data.indexOf("#{") >= 0 || data.indexOf("${") >= 0)) {
	return eval(attr.getConfigType(), data);
      }

      return null;
    }

    if (! (node instanceof Element))
      return null;

    Element elt = (Element) node;
    Element childElt = null;

    for (Node child = elt.getFirstChild();
	 child != null;
	 child = child.getNextSibling()) {
      if (child instanceof Element) {
	if (childElt != null)
	  return null;
	
	childElt = (Element) child;
      }
      
      else if (child instanceof CharacterData
	       && ! XmlUtil.isWhitespace(((CharacterData) child).getData())) {
	String data = ((CharacterData) child).getData();

	if (isEL() && attr.isEL() && childElt == null
	    && child.getNextSibling() == null
	    && (data.indexOf("#{") >= 0 || data.indexOf("${") >= 0)) {

	  String exprString = data.trim();

	  ELContext elContext = getELContext();

	  ELParser parser = new ELParser(elContext, exprString);

	  Expr expr = parser.parse();

	  Object value = expr.getValue(elContext);

	  // ioc/2403
	  return attr.getConfigType().valueOf(value);
	}
	
	return null;
      }
    }

    return null;
  }

  /**
   * Returns the text value of the node.
   */
  String getTextValue(Node node)
  {
    if (node instanceof Attr) {
      Attr attrNode = (Attr) node;
      String data = attrNode.getNodeValue();

      return data;
    }

    if (! (node instanceof Element))
      return null;

    Element elt = (Element) node;

    // ioc/2235
    if (elt.getAttributes().getLength() > 0)
      return null;

    for (Node child = elt.getFirstChild();
	 child != null;
	 child = child.getNextSibling()) {
      if (child instanceof Element) {
	return null;
      }
      
      else if (child instanceof CharacterData) {
	String data = ((CharacterData) child).getData();

	if (child.getNextSibling() == null && ! XmlUtil.isWhitespace(data)) {
	  return data;
	}
	else
	  return null;
      }
    }

    return null;
  }

  private Object eval(ConfigType type, String data)
  {
    ELContext elContext = getELContext();
    
    ELParser parser = new ELParser(elContext, data);
    
    Expr expr = parser.parse();

    Object value = type.valueOf(elContext, expr);

    if (value != null)
      return value;
    else
      return NULL;
  }

  /**
   * Returns the text value of the node.
   */
  Object getElementValue(Attribute attr, Node node)
  {
    if (! (node instanceof Element))
      return null;

    Element elt = (Element) node;
    Element childElt = null;

    for (Node child = elt.getFirstChild();
	 child != null;
	 child = child.getNextSibling()) {
      if (child instanceof Element) {
	if (childElt != null)
	  return null;
	
	childElt = (Element) child;
      }
      
      else if (child instanceof CharacterData
	       && ! XmlUtil.isWhitespace(((CharacterData) child).getData())) {
	String data = ((CharacterData) child).getData();

	if (isEL() && attr.isEL() && childElt == null
	    && child.getNextSibling() == null
	    && (data.indexOf("#{") >= 0 || data.indexOf("${") >= 0)) {
	  ELContext elContext = getELContext();

	  ELParser parser = new ELParser(elContext, data.trim());
    
	  Expr expr = parser.parse();

	  Object value = attr.getConfigType().valueOf(elContext, expr);

	  if (value != null)
	    return value;
	  else
	    return NULL;
	}
	
	return null;
      }
    }

    if (childElt == null)
      return null;

    TypeFactory factory = TypeFactory.getFactory();

    ConfigType childType
      = factory.getEnvironmentType(((QElement) childElt).getQName());

    if (childType != null) {
      Object childBean = childType.create(null);
      
      configureNode(childElt, childBean, childType);
      
      childType.init(childBean);

      Object value = childType.replaceObject(childBean);

      if (value != null)
	return value;
      else
	return NULL;
    }

    return null;
  }

  /**
   * Returns the text value of the node.
   */
  static String textValue(Node node)
  {
    if (node instanceof Attr)
      return node.getNodeValue();
    else {
      String value = XmlUtil.textValue(node);

      if (value == null || value.equals(""))
	return "";
      else if (node instanceof Element) {
	String space = ((Element) node).getAttribute("xml:space");

	if (! space.equals(""))
	  return value;
      }

      return value.trim();
    }
  }

  /**
   * Returns the text value of the node.
   */
  static String textValueNoTrim(Node node)
  {
    if (node instanceof Attr)
      return node.getNodeValue();
    else {
      String value = XmlUtil.textValue(node);

      if (value == null)
	return "";

      return value;
    }
  }

  /**
   * Evaluate as an object
   */
  public Object evalObject(String exprString)
    throws ELException
  {
    if (exprString.indexOf("${") >= 0 && isEL()) {
      ELParser parser = new ELParser(getELContext(), exprString);
      parser.setCheckEscape(true);
      Expr expr = parser.parse();

      return expr.getValue(getELContext());
    }
    else
      return exprString;
  }

  public static RuntimeException error(String msg, Node node)
  {
    String systemId = null;
    String filename = null;
    int line = 0;

    if (node instanceof QAbstractNode) {
      QAbstractNode qnode = (QAbstractNode) node;
      
      systemId = qnode.getBaseURI();
      filename = qnode.getFilename();
      line = qnode.getLine();
    }

    if (systemId != null) {
      String sourceLines = getSourceLines(systemId, line);
      
      msg = msg + sourceLines;
    }
      
    if (filename != null)
      return new LineConfigException(filename, line, msg);
    else
      return new LineConfigException(msg);
  }
  
  public static RuntimeException error(Throwable e, Node node)
  {
    String systemId = null;
    String filename = null;
    int line = 0;

    if (e instanceof RuntimeException
	&& e instanceof DisplayableException
	&& ! ConfigException.class.equals(e.getClass())) {
      return (RuntimeException) e;
    }

    if (node instanceof QAbstractNode) {
      QAbstractNode qnode = (QAbstractNode) node;
      
      systemId = qnode.getBaseURI();
      filename = qnode.getFilename();
      line = qnode.getLine();
    }

    for (; e.getCause() != null; e = e.getCause()) {
      if (e instanceof LineCompileException)
        break;
      else if (e instanceof LineConfigException)
        break;
      else if (e instanceof CompileException)
        break;
    }

    if (e instanceof LineConfigException)
      return (LineConfigException) e;
    else if (e instanceof LineCompileException) {
      return new LineConfigException(e.getMessage(), e);
    }
    else if (e instanceof ConfigException
	     && e.getMessage() != null
	     && filename != null) {
      String sourceLines = getSourceLines(systemId, line);

      return new LineConfigException(filename, line,
				     e.getMessage() + sourceLines,
				     e);
    }
    else if (e instanceof CompileException && e.getMessage() != null) {
      return new LineConfigException(filename, line, e);
    }
    else {
      String sourceLines = getSourceLines(systemId, line);
      
      String msg = filename + ":" + line + ": " + e + sourceLines;

      if (e instanceof RuntimeException) {
	throw new LineConfigException(msg, e);
      }
      else if (e instanceof Error) {
	// server/1711
	throw new LineConfigException(msg, e);
	// throw (Error) e;
      }
      else
	return new LineConfigException(msg, e);
    }
  }

  private static String getSourceLines(String systemId, int errorLine)
  {
    if (systemId == null)
      return "";
    
    ReadStream is = null;
    try {
      is = Vfs.lookup().lookup(systemId).openRead();
      int line = 0;
      StringBuilder sb = new StringBuilder("\n\n");
      String text;
      while ((text = is.readLine()) != null) {
	line++;

	if (errorLine - 2 <= line && line <= errorLine + 2) {
	  sb.append(line);
	  sb.append(": ");
	  sb.append(text);
	  sb.append("\n");
	}
      }

      return sb.toString();
    } catch (IOException e) {
      log.log(Level.FINEST, e.toString(), e);

      return "";
    } finally {
      if (is != null)
	is.close();
    }
  }

  public String toString()
  {
    return getClass().getSimpleName() + "[" + _dependentScope + "]";
  }

  static class ValidatorEntry {
    private Validator _validator;
    private ClassLoader _loader;

    ValidatorEntry(Validator validator)
    {
      _validator = validator;

      _loader = Thread.currentThread().getContextClassLoader();
    }

    void validate()
      throws ConfigException
    {
      Thread thread = Thread.currentThread();
      ClassLoader oldLoader = thread.getContextClassLoader();

      try {
	thread.setContextClassLoader(_loader);

	_validator.validate();
      } finally {
	thread.setContextClassLoader(oldLoader);
      }
    }
  }

  static {
    _resinClassSet.add(RESIN_CLASS_NS);
    _resinClassSet.add(RESIN_CLASS);
    _resinClassSet.add(RESIN_TYPE_NS);
    _resinClassSet.add(RESIN_TYPE);
    _resinClassSet.add(RESIN_PARAM_NS);
    _resinClassSet.add(RESIN_PARAM);
    /*
    _resinClassSet.add(new QName("resin:type", "http://caucho.com/ns/resin"));
    _resinClassSet.add(new QName("resin:class", "http://caucho.com/ns/resin"));
    */
  }
}