edu.cmu.aura.service.query
Class ExpressionNode

java.lang.Object
  |
  +--edu.cmu.aura.service.query.ExpressionNode

Direct Known Subclasses:

BoolNode, LeafNode

public abstract class ExpressionNode

extends java.lang.Object

Abstract class representing a node in an expression tree.

Constructor Summary

ExpressionNode()

Method Summary

int	getOperator() Get this node's operator.
abstract java.lang.String	getOperatorName() Get the name of this node's operator.
boolean	isLeafNode() Return whether or not this is a leaf node.
abstract void	setOperator(int operator) Set this node's operator

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExpressionNode

public ExpressionNode()

Method Detail

getOperator

public final int getOperator()

Get this node's operator.

Returns:

this node's operator.

setOperator

public abstract void setOperator(int operator)

Set this node's operator

Parameters:

operator - this node's operator

getOperatorName

public abstract java.lang.String getOperatorName()

Get the name of this node's operator.

Returns:

the name of this node's operator.

isLeafNode

public final boolean isLeafNode()

Return whether or not this is a leaf node.

Returns:

whether or not this is a leaf node