Field Detail

• SUPPORTED_DATA_MODEL

  public static final String SUPPORTED_DATA_MODEL

  See Also:

  Constant Field Values

Constructor Detail

• JexlEvaluator

  public JexlEvaluator()

  Constructor.

Method Detail

• isJexlEngineSilent

  public boolean isJexlEngineSilent()

  Checks whether the internal Jexl engine throws JexlException during evaluation.

  Returns:

  true if silent, false (default) otherwise

• setJexlEngineSilent

  public void setJexlEngineSilent(boolean silent)

  Delegate method for JexlEngine.setSilent(boolean) to set whether the engine throws JexlException during evaluation when an error is triggered.

  This method should be called as an optional step of the JexlEngine initialization code before expression creation & evaluation.

  Parameters:

  silent - true means no JexlException will occur, false allows them

• isJexlEngineStrict

  public boolean isJexlEngineStrict()

  Checks whether the internal Jexl engine behaves in strict or lenient mode.

  Returns:

  true for strict, false for lenient

• setJexlEngineStrict

  public void setJexlEngineStrict(boolean strict)

  Delegate method for JexlEngine.setStrict(boolean) to set whether it behaves in strict or lenient mode.

  This method is should be called as an optional step of the JexlEngine initialization code before expression creation & evaluation.

  Parameters:

  strict - true for strict, false for lenient

• getSupportedDatamodel

  public String getSupportedDatamodel()

  Description copied from interface: Evaluator
  Get the datamodel type supported by this Evaluator

  Specified by:

  getSupportedDatamodel in interface Evaluator

  Returns:

  The supported datamodel type

• eval

  public Object eval(Context ctx,
            String expr)
              throws SCXMLExpressionException

  Evaluate an expression.

  Specified by:

  eval in interface Evaluator

  Parameters:

  ctx - variable context

  expr - expression

  Returns:

  a result of the evaluation

  Throws:

  SCXMLExpressionException - For a malformed expression

  See Also:

  Evaluator.eval(Context, String)

• evalCond

  public Boolean evalCond(Context ctx,
                 String expr)
                   throws SCXMLExpressionException

  Description copied from interface: Evaluator
  Evaluate a condition. Manifests as "cond" attributes of <transition>, <if> and <elseif> elements.

  Specified by:

  evalCond in interface Evaluator

  Parameters:

  ctx - variable context

  expr - expression

  Returns:

  true/false

  Throws:

  SCXMLExpressionException - A malformed expression exception

  See Also:

  Evaluator.evalCond(Context, String)

• evalLocation

  public Object evalLocation(Context ctx,
                    String expr)
                      throws SCXMLExpressionException

  Description copied from interface: Evaluator
  Evaluate a location that returns a data assignable reference or list of references. Manifests as "location" attributes of <assign> element.

  Specified by:

  evalLocation in interface Evaluator

  Parameters:

  ctx - variable context

  expr - expression

  Returns:

  The location result.

  Throws:

  SCXMLExpressionException - A malformed expression exception

  See Also:

  Evaluator.evalLocation(Context, String)

• evalAssign

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

  Description copied from interface: Evaluator
  Assigns data to a location

  Specified by:

  evalAssign in interface Evaluator

  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, AssignType, String)

• evalScript

  public Object evalScript(Context ctx,
                  String script)
                    throws SCXMLExpressionException

  Description copied from interface: Evaluator
  Evaluate a script. Manifests as <script> element.

  Specified by:

  evalScript in interface Evaluator

  Parameters:

  ctx - variable context

  script - The script

  Returns:

  The result of the script execution.

  Throws:

  SCXMLExpressionException - A malformed script

  See Also:

  Evaluator.evalScript(Context, String)

• newContext

  public Context newContext(Context parent)

  Create a new child context.

  Specified by:

  newContext in interface Evaluator

  Parameters:

  parent - parent context

  Returns:

  new child context

  See Also:

  Evaluator.newContext(Context)

• createJexlEngine

  protected org.apache.commons.jexl2.JexlEngine createJexlEngine()

  Create the internal JexlEngine member during the initialization. This method can be overriden to specify more detailed options into the JexlEngine.

  Returns:

  new JexlEngine instance

• getEffectiveContext

  protected JexlContext getEffectiveContext(JexlContext nodeCtx)

  Create a new context which is the summation of contexts from the current state to document root, child has priority over parent in scoping rules.

  Parameters:

  nodeCtx - The JexlContext for this state.

  Returns:

  The effective JexlContext for the path leading up to document root.