ptolemy.data.expr

Class ASTPtMethodCallNode

java.lang.Object

ptolemy.data.expr.ASTPtRootNode

ptolemy.data.expr.ASTPtMethodCallNode

All Implemented Interfaces:

java.lang.Cloneable, Node

public class ASTPtMethodCallNode
extends ASTPtRootNode

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

To allow extension of the parser capabilities without modifying the kernel code, method calls on Tokens are supported with the following syntax (token).methodName(comma separated arguments).

Method arguments are processed as described in ASTPtFunctionApplicationNode. However, to allow element-by-element method calls on ArrayTokens, the following sequence is followed here to find a method to execute:

• Look for a method with tokens as supplied by PtParser.
• If that fails, convert all instances of ArrayToken to Token[] and look again, element-by-element.
• If that fails, convert all method arguments to their underlying java types and try again.
• Finally, if the above fails, convert the method object Token to its underlying java type and try again.

Since:

Ptolemy II 0.2

Version:

$Id$

Author:

Neil Smyth, University of California;, Zoltan Kemenczy, Research in Motion Limited

See Also:

ASTPtRootNode, PtParser, Token

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Yellow (nsmyth)

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	_methodName Need to store the method name of the method call.

Fields inherited from class ptolemy.data.expr.ASTPtRootNode

_children, _id, _isConstant, _parent, _ptToken, _ptType

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
java.lang.String	getMethodName() Return the name of the method invoked by this node.
void	jjtClose() This method is called after all the child nodes have been added.
void	visit(ParseTreeVisitor visitor) Traverse this node with the given visitor.

Methods inherited from class ptolemy.data.expr.ASTPtRootNode

clone, displayParseTree, evaluateParseTree, getToken, getType, isCongruent, isConstant, isEvaluated, jjtAddChild, 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

_methodName

protected java.lang.String _methodName

Need to store the method name of the method call.

Constructor Detail

ASTPtMethodCallNode

public ASTPtMethodCallNode(int id)

ASTPtMethodCallNode

public ASTPtMethodCallNode(PtParser p,
                           int id)

Method Detail

getMethodName

public java.lang.String getMethodName()

Return the name of the method invoked by this node.

Returns:

the name of the method invoked by this node.

jjtClose

public void jjtClose()

Description copied from interface: Node

This method is called after all the child nodes have been added.

Specified by:

jjtClose in interface Node

Overrides:

jjtClose in class ASTPtRootNode

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.