Constructor Detail

• XPathBuiltin

  public XPathBuiltin()

Method Detail

• setEvaluator

  public static void setEvaluator(XPathEvaluator evaluator)

  Optional static setter to change and override the default XPathEvaluator

  Parameters:

  evaluator - A custom evaluator to be used

• eval

  public static Object eval(Context ctx,
            String expression)
                     throws SCXMLExpressionException

  Evaluate an xpath expression returning a data value

  Parameters:

  ctx - variable context

  expression - xpath expression

  Returns:

  the result of the evaluation

  Throws:

  SCXMLExpressionException - A malformed expression exception

  See Also:

  Evaluator.eval(Context, String)

• evalLocation

  public static Object evalLocation(Context ctx,
                    String expression)
                             throws SCXMLExpressionException

  Evaluate an xpath location that returns a data assignable reference or list of references. Manifests as "location" attributes of <assign> element.

  Parameters:

  ctx - variable context

  expression - expression

  Returns:

  The location result.

  Throws:

  SCXMLExpressionException - A malformed expression exception

  See Also:

  Evaluator.evalLocation(Context, String)

• isXPathLocation

  public static boolean isXPathLocation(Context ctx,
                        Object data)

  Determine if an Evaluator.evalLocation(Context, String) returned result represents an XPath location

  Parameters:

  ctx - variable context

  data - result data from Evaluator.evalLocation(Context, String)

  Returns:

  true if the data represents an XPath location

  See Also:

  XPathEvaluator.isXPathLocation(Context, Object)

• assign

  public static void assign(Context ctx,
            Object location,
            Object data,
            Evaluator.AssignType type,
            String attr)
                     throws SCXMLExpressionException

  Assigns data to a location

  Parameters:

  ctx - variable context

  location - location expression

  data - the data to assign.

  type - the type of assignment to perform, null assumes Evaluator.AssignType.REPLACE_CHILDREN

  attr - the name of the attribute to add when using type Evaluator.AssignType.ADD_ATTRIBUTE

  Throws:

  SCXMLExpressionException - A malformed expression exception

  See Also:

  Evaluator.evalAssign(Context, String, Object, Evaluator.AssignType, String), XPathEvaluator.assign(Context, Object, Object, Evaluator.AssignType, String)