jsynoptic.parser
Class ExpressionNode

java.lang.Object
  jsynoptic.parser.SimpleNode
      jsynoptic.parser.ExpressionNode

All Implemented Interfaces:

java.lang.Cloneable, Node

Direct Known Subclasses:

NodeForAddition, NodeForBooleanTest, NodeForFunctionCall, NodeForLogicalOperation, NodeForMultiplication, NodeForNumber, NodeForPower, NodeForUnaryOperation

public abstract class ExpressionNode
extends SimpleNode
implements java.lang.Cloneable

This is the base class for all our nodes It has an evaluate() function, which evaluates the subtree under this node and return a Number value As a commodity to avoid duplicate code, it also has a function to return the list of variables used at any place in the tree

Field Summary

Fields inherited from class jsynoptic.parser.SimpleNode

children, id, parent, parser

Constructor Summary

ExpressionNode(ExpressionParser p, int i)
From SimpleNode

ExpressionNode(int i)
From SimpleNode

Method Summary

java.lang.Object	clone()
abstract java.lang.Number	evaluate() Evaluate the subtree under this node and return the computation result as a number
java.util.Set	getVariables() Return the list of variables used at any place in the tree.

Methods inherited from class jsynoptic.parser.SimpleNode

dump, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, toString, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ExpressionNode

public ExpressionNode(int i)

From SimpleNode

Parameters:

i -

ExpressionNode

public ExpressionNode(ExpressionParser p,
                      int i)

From SimpleNode

Parameters:

p -

i -

Method Detail

evaluate

public abstract java.lang.Number evaluate()

Evaluate the subtree under this node and return the computation result as a number

getVariables

public java.util.Set getVariables()

Return the list of variables used at any place in the tree.

Returns:

The vector of all variable used, of type VariableDefinition. The returned vector may be empty, but not null

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object