ptolemy.data.expr
Class ASTPtRelationalNode

java.lang.Object
  ptolemy.data.expr.ASTPtRootNode
      ptolemy.data.expr.ASTPtRelationalNode

All Implemented Interfaces:

java.lang.Cloneable, Node

public class ASTPtRelationalNode
extends ASTPtRootNode

The parse tree created from the expression string consists of a hierarchy of node objects. This class represents relational operator(>, >=, <, <=, ==, !=) nodes in the parse tree.

Each node of this type has exactly two children. The resolved type is a BooleanToken.

Since:

Ptolemy II 0.2

Version:

$Id: ASTPtRelationalNode.java 38798 2005-07-08 20:00:01Z cxh $

Author:

Neil Smyth

See Also:

ASTPtRootNode, PtParser, Token

Accepted Rating:

Red (cxh)

Proposed Rating:

Yellow (nsmyth)

Field Summary

protected Token

_lexicalToken

Fields inherited from class ptolemy.data.expr.ASTPtRootNode

_children, _id, _isConstant, _parent, _ptToken, _ptType

Constructor Summary

ASTPtRelationalNode(int id)

ASTPtRelationalNode(PtParser p, int id)

Method Summary

Token	getOperator() Return the lexical token representing the operation of this node.
boolean	isCongruent(ASTPtRootNode node, java.util.Map renaming) Return true if this node is (hierarchically) congruent to the given node, under the given renaming of bound identifiers.
void	visit(ParseTreeVisitor visitor) Traverse this node with the given visitor.

Methods inherited from class ptolemy.data.expr.ASTPtRootNode

clone, displayParseTree, evaluateParseTree, getToken, getType, isConstant, isEvaluated, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, setConstant, setToken, setType, toString, toString

Methods inherited from class java.lang.Object

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

Field Detail

_lexicalToken

protected Token _lexicalToken

Constructor Detail

ASTPtRelationalNode

public ASTPtRelationalNode(int id)

ASTPtRelationalNode

public ASTPtRelationalNode(PtParser p,
                           int id)

Method Detail

getOperator

public Token getOperator()

Return the lexical token representing the operation of this node.

isCongruent

public boolean isCongruent(ASTPtRootNode node,
                           java.util.Map renaming)

Return true if this node is (hierarchically) congruent to the given node, under the given renaming of bound identifiers. Derived classes should extend this method to add additional necessary congruency checks.

Overrides:

isCongruent in class ASTPtRootNode

Parameters:

node - The node to compare to.

renaming - A map from String to String that gives a renaming from identifiers in this node to identifiers in the given node.

visit

public void visit(ParseTreeVisitor visitor)
           throws IllegalActionException

Traverse this node with the given visitor.

Overrides:

visit in class ASTPtRootNode

Throws:

IllegalActionException