ptolemy.data.expr

Class ASTPtLogicalNode

java.lang.Object

ptolemy.data.expr.ASTPtRootNode

ptolemy.data.expr.ASTPtLogicalNode

All Implemented Interfaces:

java.lang.Cloneable, Node

public class ASTPtLogicalNode
extends ASTPtRootNode

The parse tree created from the expression string consists of a hierarchy of node objects. This class represents logical operator(&&, ||) nodes in the parse tree.

Since:

Ptolemy II 0.2

Version:

$Id$

Author:

Neil Smyth, Steve Neuendorffer

See Also:

ASTPtRootNode, PtParser, Token

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Yellow (nsmyth)

Field Summary

Fields

Modifier and Type	Field and Description
protected Token	_lexicalToken

Fields inherited from class ptolemy.data.expr.ASTPtRootNode

_children, _id, _isConstant, _parent, _ptToken, _ptType

Constructor Summary

Constructors

Constructor and Description
ASTPtLogicalNode(int id)
ASTPtLogicalNode(PtParser p, int id)

Method Summary

Modifier and Type	Method and Description
Token	getOperator() Return the operator for child nodes 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.
boolean	isLogicalAnd() Return true if the node represents the logical AND of its children.
boolean	isLogicalOr() Return true if the node represents the logical OR of its children.
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

ASTPtLogicalNode

public ASTPtLogicalNode(int id)

ASTPtLogicalNode

public ASTPtLogicalNode(PtParser p,
                        int id)

Method Detail

getOperator

public Token getOperator()

Return the operator for child nodes of this node.

Returns:

the operator for child nodes 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.

Returns:

True if the node is congruent.

isLogicalAnd

public boolean isLogicalAnd()

Return true if the node represents the logical AND of its children.

Returns:

true if the node represents the logical AND of its children.

isLogicalOr

public boolean isLogicalOr()

Return true if the node represents the logical OR of its children.

Returns:

true if the node represents the logical OR of its children.

visit

public void visit(ParseTreeVisitor visitor)
           throws IllegalActionException

Traverse this node with the given visitor.

Overrides:

visit in class ASTPtRootNode

Parameters:

visitor - The visitor.

Throws:

IllegalActionException - Always thrown in this base class the visit() method is not implemented here.