Package ptolemy.data.expr

Class ASTPtLeafNode

java.lang.Object

ptolemy.data.expr.ASTPtRootNode

ptolemy.data.expr.ASTPtLeafNode

All Implemented Interfaces:

java.lang.Cloneable, Node

public class ASTPtLeafNode
extends ASTPtRootNode

The parse tree created from the expression string consists of a hierarchy of node objects. This class represents the leaf nodes of the tree.

Since:

Ptolemy II 0.2

Version:

$Id$

Author:

Neil Smyth

See Also:

ASTPtRootNode, PtParser, Token

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Yellow (nsmyth)

Field Summary

Fields

Modifier and Type	Field	Description
protected java.lang.String	_name	The identifier that this leaf node refers to.

Fields inherited from class ptolemy.data.expr.ASTPtRootNode

_children, _id, _isConstant, _parent, _ptToken, _ptType

Constructor Summary

Constructors

Constructor	Description
ASTPtLeafNode(int id)
ASTPtLeafNode(PtParser p, int id)

Method Summary

Modifier and Type	Method	Description
java.lang.String	getName()	Return the name that this node refers to.
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	isIdentifier()	Return true if the leaf is an identifier that must be evaluated in scope.
java.lang.String	toString()	Return a string representation
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

Methods inherited from class java.lang.Object

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

Field Detail

_name

protected java.lang.String _name

The identifier that this leaf node refers to.

Constructor Detail

ASTPtLeafNode

public ASTPtLeafNode(int id)

ASTPtLeafNode

public ASTPtLeafNode(PtParser p,
                     int id)

Method Detail

getName

public java.lang.String getName()

Return the name that this node refers to. This may be a literal value, such as "5", or a reference to another object, such as the name of a variable in scope.

Returns:

The name to which this node refers.

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.

isIdentifier

public boolean isIdentifier()

Return true if the leaf is an identifier that must be evaluated in scope.

Returns:

true if the leaf is not a constant.

toString

public java.lang.String toString()

Return a string representation

Overrides:

toString in class ASTPtRootNode

Returns:

The string value of this node.

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.