import com.sun.org.apache.xpath.internal.objects.XBoolean; //导入依赖的package包/类
/**
 * The date:leap-year function returns true if the year given in a date
 * is a leap year. If no argument is given, then the current local
 * date/time, as returned by date:date-time is used as a default argument.
 * The date/time string specified as the first argument must be a
 * right-truncated string in the format defined as the lexical representation
 * of xs:dateTime in one of the formats defined in
 * <a href="http://www.w3.org/TR/xmlschema-2/">[XML Schema Part 2: Datatypes]</a>.
 * The permitted formats are as follows:
 *    xs:dateTime (CCYY-MM-DDThh:mm:ss)
 *    xs:date (CCYY-MM-DD)
 *    xs:gYearMonth (CCYY-MM)
 *    xs:gYear (CCYY)
 * If the date/time string is not in one of these formats, then NaN is returned.
 */
public static XObject leapYear(String datetimeIn)
  throws ParseException
{
  String[] edz = getEraDatetimeZone(datetimeIn);
  String datetime = edz[1];
  if (datetime == null)
    return new XNumber(Double.NaN);

  String[] formats = {dt, d, gym, gy};
  double dbl = getNumber(datetime, formats, Calendar.YEAR);
  if (dbl == Double.NaN)
    return new XNumber(Double.NaN);
  int yr = (int)dbl;
  return new XBoolean(yr % 400 == 0 || (yr % 100 != 0 && yr % 4 == 0));
}
 

import com.sun.org.apache.xpath.internal.objects.XBoolean; //导入依赖的package包/类
/**
 * OR two expressions and return the boolean result. Override
 * superclass method for optimization purposes.
 *
 * @param xctxt The runtime execution context.
 *
 * @return {@link com.sun.org.apache.xpath.internal.objects.XBoolean#S_TRUE} or
 * {@link com.sun.org.apache.xpath.internal.objects.XBoolean#S_FALSE}.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
{

  XObject expr1 = m_left.execute(xctxt);

  if (!expr1.bool())
  {
    XObject expr2 = m_right.execute(xctxt);

    return expr2.bool() ? XBoolean.S_TRUE : XBoolean.S_FALSE;
  }
  else
    return XBoolean.S_TRUE;
}
 

import com.sun.org.apache.xpath.internal.objects.XBoolean; //导入依赖的package包/类
/**
 * AND two expressions and return the boolean result. Override
 * superclass method for optimization purposes.
 *
 * @param xctxt The runtime execution context.
 *
 * @return {@link com.sun.org.apache.xpath.internal.objects.XBoolean#S_TRUE} or
 * {@link com.sun.org.apache.xpath.internal.objects.XBoolean#S_FALSE}.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
{

  XObject expr1 = m_left.execute(xctxt);

  if (expr1.bool())
  {
    XObject expr2 = m_right.execute(xctxt);

    return expr2.bool() ? XBoolean.S_TRUE : XBoolean.S_FALSE;
  }
  else
    return XBoolean.S_FALSE;
}
 

import com.sun.org.apache.xpath.internal.objects.XBoolean; //导入依赖的package包/类
/**
 * Execute the function.  The function must return
 * a valid object.
 * @param xctxt The current execution context.
 * @return A valid XObject.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
{

  String lang = m_arg0.execute(xctxt).str();
  int parent = xctxt.getCurrentNode();
  boolean isLang = false;
  DTM dtm = xctxt.getDTM(parent);

  while (DTM.NULL != parent)
  {
    if (DTM.ELEMENT_NODE == dtm.getNodeType(parent))
    {
      int langAttr = dtm.getAttributeNode(parent, "http://www.w3.org/XML/1998/namespace", "lang");

      if (DTM.NULL != langAttr)
      {
        String langVal = dtm.getNodeValue(langAttr);
        // %OPT%
        if (langVal.toLowerCase().startsWith(lang.toLowerCase()))
        {
          int valLen = lang.length();

          if ((langVal.length() == valLen)
                  || (langVal.charAt(valLen) == '-'))
          {
            isLang = true;
          }
        }

        break;
      }
    }

    parent = dtm.getParent(parent);
  }

  return isLang ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

import com.sun.org.apache.xpath.internal.objects.XBoolean; //导入依赖的package包/类
/**
 * Execute the function.  The function must return
 * a valid object.
 * @param xctxt The current execution context.
 * @return A valid XObject.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
{

  String s1 = m_arg0.execute(xctxt).str();
  String s2 = m_arg1.execute(xctxt).str();

  // Add this check for JDK consistency for empty strings.
  if (s1.length() == 0 && s2.length() == 0)
    return XBoolean.S_TRUE;

  int index = s1.indexOf(s2);

  return (index > -1) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

import com.sun.org.apache.xpath.internal.objects.XBoolean; //导入依赖的package包/类
/**
 * This method is an extension that implements as a Xalan extension
 * the node-set function also found in xt and saxon.
 * If the argument is a Result Tree Fragment, then <code>nodeset</code>
 * returns a node-set consisting of a single root node as described in
 * section 11.1 of the XSLT 1.0 Recommendation.  If the argument is a
 * node-set, <code>nodeset</code> returns a node-set.  If the argument
 * is a string, number, or boolean, then <code>nodeset</code> returns
 * a node-set consisting of a single root node with a single text node
 * child that is the result of calling the XPath string() function on the
 * passed parameter.  If the argument is anything else, then a node-set
 * is returned consisting of a single root node with a single text node
 * child that is the result of calling the java <code>toString()</code>
 * method on the passed argument.
 * Most of the
 * actual work here is done in <code>MethodResolver</code> and
 * <code>XRTreeFrag</code>.
 * @param myProcessor Context passed by the extension processor
 * @param rtf Argument in the stylesheet to the nodeset extension function
 *
 * NEEDSDOC ($objectName$) @return
 */
public static NodeSet nodeset(ExpressionContext myProcessor, Object rtf)
{

  String textNodeValue;

  if (rtf instanceof NodeIterator)
  {
    return new NodeSet((NodeIterator) rtf);
  }
  else
  {
    if (rtf instanceof String)
    {
      textNodeValue = (String) rtf;
    }
    else if (rtf instanceof Boolean)
    {
      textNodeValue = new XBoolean(((Boolean) rtf).booleanValue()).str();
    }
    else if (rtf instanceof Double)
    {
      textNodeValue = new XNumber(((Double) rtf).doubleValue()).str();
    }
    else
    {
      textNodeValue = rtf.toString();
    }

    // This no longer will work right since the DTM.
    // Document myDoc = myProcessor.getContextNode().getOwnerDocument();
    Document myDoc = getDocument();

      Text textNode = myDoc.createTextNode(textNodeValue);
      DocumentFragment docFrag = myDoc.createDocumentFragment();

      docFrag.appendChild(textNode);

    return new NodeSet(docFrag);
  }
}
 

import com.sun.org.apache.xpath.internal.objects.XBoolean; //导入依赖的package包/类
/**
 * Execute the function.  The function must return
 * a valid object.
 * @param xctxt The current execution context.
 * @return A valid XObject.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
{

  String prefix;
  String namespace;
  String methName;

  String fullName = m_arg0.execute(xctxt).str();
  int indexOfNSSep = fullName.indexOf(':');

  if (indexOfNSSep < 0)
  {
    prefix = "";
    namespace = Constants.S_XSLNAMESPACEURL;
    methName = fullName;
  }
  else
  {
    prefix = fullName.substring(0, indexOfNSSep);
    namespace = xctxt.getNamespaceContext().getNamespaceForPrefix(prefix);
    if (null == namespace)
      return XBoolean.S_FALSE;
    methName= fullName.substring(indexOfNSSep + 1);
  }

  if (namespace.equals(Constants.S_XSLNAMESPACEURL)
  ||  namespace.equals(Constants.S_BUILTIN_EXTENSIONS_URL)) {

      // J2SE does not support Xalan interpretive
      /*
    try {
      TransformerImpl transformer = (TransformerImpl) xctxt.getOwnerObject();
      return transformer.getStylesheet().getAvailableElements().containsKey(
                                                          new QName(namespace, methName))
             ? XBoolean.S_TRUE : XBoolean.S_FALSE;
    } catch (Exception e) {
      return XBoolean.S_FALSE;
    }
    */
      return XBoolean.S_FALSE;
  } else {
    //dml
    ExtensionsProvider extProvider = (ExtensionsProvider)xctxt.getOwnerObject();
    return extProvider.elementAvailable(namespace, methName)
           ? XBoolean.S_TRUE : XBoolean.S_FALSE;
  }
}