Constructor Detail

• MMap

  public MMap()

Method Detail

• preprocess

  public MatrixNodeI preprocess(ASTFunNode node,
                                MatrixPreprocessor visitor,
                                MatrixJep jep,
                                MatrixNodeFactory nf)
                         throws ParseException

  Description copied from interface: SpecialPreProcessorI
  Subverts the preprocessing stage. Preprocessing performs a number of operations:

  1. Converts each node into one of the subtypes of MatrixNodeI
  2. Calculate the dimensions for the results
  3. Performs any special symbolic operations such as differentation

  In general the first step in preprocessing is to run the preprocessor on the children of the node. This can be done using

   MatrixNodeI children[] = visitor.visitChildrenAsArray(node,null);
   

  The final step is to construct a node of the correct type. The MatrixNodeFactory argument has a number of methods to do this. For example

   return (ASTMFunNode) nf.buildOperatorNode(node.getOperator(),children,rhsDim);
   

  Note how the dimension is specified.

  Specified by:

  preprocess in interface SpecialPreProcessorI

  Parameters:

  node - the top node of the tree representing the function and its arguments.

  visitor - A reference to the preprocessing visitor.

  jep - A reference of the MatrixJep instance.

  nf - A reference to the node factory object.

  Returns:

  A new MatrixNodeI representing the converted function.

  Throws:

  ParseException - if some error occurs.

• evaluate

  public MatrixValueI evaluate(MatrixNodeI node,
                               MatrixEvaluator visitor,
                               MatrixJep jep)
                        throws ParseException

  Description copied from interface: MatrixSpecialEvaluationI
  Returns the result of evaluating this node and the tree below. This method has the responsibility for evaluating the children of the node and it should generally call

   MatrixValueI val = (MatrixValueI) node.jjtGetChild(i).jjtAccept(visitor,null); 
   

  for each child.

  The final results should be copied into the mvalue field of the node using

   MatrixValueI mvalue = node.getMValue();
   mvalue.setEles(res);
   return mvalue;
   

  Specified by:

  evaluate in interface MatrixSpecialEvaluationI

  Parameters:

  node - The top node.

  visitor - The parser visitor

  jep - The current MatrixJep instance.

  Returns:

  Value after evaluation.

  Throws:

  ParseException