Package com.singularsys.extensions.structure

Class IfNode

java.lang.Object

com.singularsys.jep.parser.SimpleNode

com.singularsys.extensions.structure.StructureNode

com.singularsys.extensions.structure.IfNode

All Implemented Interfaces:

Node

public class IfNode
extends StructureNode

A node representing an if statement.

Author:

rich

Nested Class Summary

Nested classes/interfaces inherited from interface com.singularsys.jep.parser.Node

Node.HookKey

Field Summary

Fields inherited from class com.singularsys.jep.parser.SimpleNode

children, id, keys, parent, vals

Constructor Summary

Constructors

Constructor	Description
IfNode(Node condition, Node trueNode, Node falseNode)	Constructor

Method Summary

Modifier and Type	Method	Description
Object	eval(Evaluator ev)	Evaluate the statement
Node	getCondition()
Node	getFalseNode()
Node	getTrueNode()
String	toString()

Methods inherited from class com.singularsys.extensions.structure.StructureNode

getName, getOperator, getPFMC, getValue, getVar, testCondition

Methods inherited from class com.singularsys.jep.parser.SimpleNode

childIterator, children, childrenAccept, dump, getChildren, getHook, getId, hookKeys, jjtAccept, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, removeHook, setHook, toString

Methods inherited from class java.lang.Object

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

Constructor Details

IfNode

public IfNode(Node condition,
 Node trueNode,
 Node falseNode)

Constructor

Parameters:

condition - expression giving the condition

trueNode - expression evaluated if true

falseNode - expression evaluated if false, may be null.

Method Details

getCondition

public Node getCondition()

getFalseNode

public Node getFalseNode()

getTrueNode

public Node getTrueNode()

eval

public Object eval(Evaluator ev)
            throws EvaluationException

Evaluate the statement

Specified by:

eval in class StructureNode

Parameters:

ev - The evaluator the Evaluator.eval(com.singularsys.jep.parser.Node) can be used to evaluate children.

Returns:

result trueNode or falseNode or null if condition is true and falseNode is not specified.

Throws:

EvaluationException - if evaluation cannot be performed

toString

public String toString()

Overrides:

toString in class Object