org.apache.xpath.objects.XBoolean Java Examples

/**
 * Evaluates an XPath expression from the specified node, returning the resultant nodes.
 *
 * @param <T> the type class
 * @param node the node to start searching from
 * @param xpathExpr the XPath expression
 * @param resolver the prefix resolver to use for resolving namespace prefixes, or null
 * @return the list of objects found
 */
@SuppressWarnings("unchecked")
public static <T> List<T> getByXPath(final DomNode node, final String xpathExpr, final PrefixResolver resolver) {
    if (xpathExpr == null) {
        throw new NullPointerException("Null is not a valid XPath expression");
    }

    PROCESS_XPATH_.set(Boolean.TRUE);
    final List<T> list = new ArrayList<>();
    try {
        final XObject result = evaluateXPath(node, xpathExpr, resolver);

        if (result instanceof XNodeSet) {
            final NodeList nodelist = ((XNodeSet) result).nodelist();
            for (int i = 0; i < nodelist.getLength(); i++) {
                list.add((T) nodelist.item(i));
            }
        }
        else if (result instanceof XNumber) {
            list.add((T) Double.valueOf(result.num()));
        }
        else if (result instanceof XBoolean) {
            list.add((T) Boolean.valueOf(result.bool()));
        }
        else if (result instanceof XString) {
            list.add((T) result.str());
        }
        else {
            throw new RuntimeException("Unproccessed " + result.getClass().getName());
        }
    }
    catch (final Exception e) {
        throw new RuntimeException("Could not retrieve XPath >" + xpathExpr + "< on " + node, e);
    }
    finally {
        PROCESS_XPATH_.set(Boolean.FALSE);
    }
    return list;
}
 

/**
 * 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;
}
 

/**
 * 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;
}
 

/**
 * AND two expressions and return the boolean result. Override
 * superclass method for optimization purposes.
 *
 * @param xctxt The runtime execution context.
 *
 * @return {@link org.apache.xpath.objects.XBoolean#S_TRUE} or 
 * {@link org.apache.xpath.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;
}
 

/**
 * OR two expressions and return the boolean result. Override
 * superclass method for optimization purposes.
 *
 * @param xctxt The runtime execution context.
 *
 * @return {@link org.apache.xpath.objects.XBoolean#S_TRUE} or 
 * {@link org.apache.xpath.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;
}
 

/**
 * Evaluates an XPath expression from the specified node, returning the resultant nodes.
 *
 * @param <T> the type class
 * @param node the node to start searching from
 * @param xpathExpr the XPath expression
 * @param resolver the prefix resolver to use for resolving namespace prefixes, or null
 * @return the list of objects found
 */
@SuppressWarnings("unchecked")
public static <T> List<T> getByXPath(final DomNode node, final String xpathExpr,
        final PrefixResolver resolver) {
    if (xpathExpr == null) {
        throw new IllegalArgumentException("Null is not a valid XPath expression");
    }

    PROCESS_XPATH_.set(Boolean.TRUE);
    final List<T> list = new ArrayList<>();
    try {
        final XObject result = evaluateXPath(node, xpathExpr, resolver);

        if (result instanceof XNodeSet) {
            final NodeList nodelist = ((XNodeSet) result).nodelist();
            for (int i = 0; i < nodelist.getLength(); i++) {
                list.add((T) nodelist.item(i));
            }
        }
        else if (result instanceof XNumber) {
            list.add((T) Double.valueOf(result.num()));
        }
        else if (result instanceof XBoolean) {
            list.add((T) Boolean.valueOf(result.bool()));
        }
        else if (result instanceof XString) {
            list.add((T) result.str());
        }
        else {
            throw new RuntimeException("Unproccessed " + result.getClass().getName());
        }
    }
    catch (final Exception e) {
        throw new RuntimeException("Could not retrieve XPath >" + xpathExpr + "< on " + node, e);
    }
    finally {
        PROCESS_XPATH_.set(Boolean.FALSE);
    }
    return list;
}
 

/**
 * 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))
  {
    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;
    }
  }
  else
  {
    //dml
    ExtensionsProvider extProvider = (ExtensionsProvider)xctxt.getOwnerObject();
    return extProvider.elementAvailable(namespace, methName)
           ? XBoolean.S_TRUE : XBoolean.S_FALSE;
  }
}
 

/**
 * Apply the operation to two operands, and return the result.
 *
 *
 * @param right non-null reference to the evaluated right operand.
 *
 * @return non-null reference to the XObject that represents the result of the operation.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject operate(XObject right) throws javax.xml.transform.TransformerException
{

  if (XObject.CLASS_BOOLEAN == right.getType())
    return right;
  else
    return right.bool() ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

/**
 * Apply the operation to two operands, and return the result.
 *
 *
 * @param left non-null reference to the evaluated left operand.
 * @param right non-null reference to the evaluated right operand.
 *
 * @return non-null reference to the XObject that represents the result of the operation.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject operate(XObject left, XObject right)
        throws javax.xml.transform.TransformerException
{
  return left.greaterThanOrEqual(right)
         ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

/**
 * Apply the operation to two operands, and return the result.
 *
 *
 * @param left non-null reference to the evaluated left operand.
 * @param right non-null reference to the evaluated right operand.
 *
 * @return non-null reference to the XObject that represents the result of the operation.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject operate(XObject left, XObject right)
        throws javax.xml.transform.TransformerException
{
  return left.lessThan(right) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

/**
 * Apply the operation to two operands, and return the result.
 *
 *
 * @param left non-null reference to the evaluated left operand.
 * @param right non-null reference to the evaluated right operand.
 *
 * @return non-null reference to the XObject that represents the result of the operation.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject operate(XObject left, XObject right)
        throws javax.xml.transform.TransformerException
{
  return left.greaterThan(right) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

/**
 * Apply the operation to two operands, and return the result.
 *
 *
 * @param left non-null reference to the evaluated left operand.
 * @param right non-null reference to the evaluated right operand.
 *
 * @return non-null reference to the XObject that represents the result of the operation.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject operate(XObject left, XObject right)
        throws javax.xml.transform.TransformerException
{
  return left.lessThanOrEqual(right) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

/**
 * Apply the operation to two operands, and return the result.
 *
 *
 * @param left non-null reference to the evaluated left operand.
 * @param right non-null reference to the evaluated right operand.
 *
 * @return non-null reference to the XObject that represents the result of the operation.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject operate(XObject left, XObject right)
        throws javax.xml.transform.TransformerException
{
  return left.equals(right) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

/**
 * Apply the operation to two operands, and return the result.
 *
 *
 * @param left non-null reference to the evaluated left operand.
 * @param right non-null reference to the evaluated right operand.
 *
 * @return non-null reference to the XObject that represents the result of the operation.
 *
 * @throws javax.xml.transform.TransformerException
 */
public XObject operate(XObject left, XObject right)
        throws javax.xml.transform.TransformerException
{
  return (left.notEquals(right)) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

/**
 * 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
{
  return XBoolean.S_TRUE;
}
 

/**
 * 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
{
  return m_arg0.execute(xctxt).xstr().startsWith(m_arg1.execute(xctxt).xstr())
         ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

/**
 * 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
{
  return XBoolean.S_FALSE;
}
 

/**
 * 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
{
  return m_arg0.execute(xctxt).bool() ? XBoolean.S_TRUE : XBoolean.S_FALSE;
}
 

/**
 * 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
{
  return m_arg0.execute(xctxt).bool() ? XBoolean.S_FALSE : XBoolean.S_TRUE;
}