ptolemy.actor.gt.util
Class PtolemyExpressionString

java.lang.Object
  ptolemy.actor.gt.util.PtolemyExpressionString

public class PtolemyExpressionString
extends java.lang.Object

A wrapper for a string containing a Ptolemy expression.

Since:

Ptolemy II 8.0

Version:

$Id: PtolemyExpressionString.java 57046 2010-01-27 23:35:53Z cxh $

Author:

Thomas Huining Feng

Accepted Rating:

Red (tfeng)

Proposed Rating:

Yellow (tfeng)

Field Summary

private Token	_token The last evaluation result.
private java.lang.String	_value The Ptolemy expression.
private ASTPtRootNode	_valueParseTree The value parse tree.
private VariableScope	_variableScope The scope in which the Ptolemy expression is evaluated.

Constructor Summary

PtolemyExpressionString()
Construct a Ptolemy expression string.

PtolemyExpressionString(NamedObj container)
Construct a Ptolemy expression string with the given container as its scope.

PtolemyExpressionString(NamedObj container, java.lang.String value)
Construct a Ptolemy expression string with the given container as its scope and the given value as its initial value.

Method Summary

java.lang.String	get() Get the current value.
Token	getToken() Evaluate the Ptolemy expression and return the result in a token.
void	set(java.lang.String value) Set the value.
java.lang.String	toString() Return the Ptolemy expression in a string.

Methods inherited from class java.lang.Object

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

Field Detail

_token

private Token _token

The last evaluation result.

_value

private java.lang.String _value

The Ptolemy expression.

_valueParseTree

private ASTPtRootNode _valueParseTree

The value parse tree.

_variableScope

private VariableScope _variableScope

The scope in which the Ptolemy expression is evaluated.

Constructor Detail

PtolemyExpressionString

public PtolemyExpressionString()

Construct a Ptolemy expression string.

PtolemyExpressionString

public PtolemyExpressionString(NamedObj container)

Construct a Ptolemy expression string with the given container as its scope.

Parameters:

container - The container.

PtolemyExpressionString

public PtolemyExpressionString(NamedObj container,
                               java.lang.String value)

Construct a Ptolemy expression string with the given container as its scope and the given value as its initial value.

Parameters:

container - The container.

value - The initial value.

Method Detail

get

public java.lang.String get()

Get the current value.

Returns:

The value.

See Also:

set(String)

getToken

public Token getToken()
               throws IllegalActionException

Evaluate the Ptolemy expression and return the result in a token.

Returns:

The result.

Throws:

IllegalActionException - If error occurs in the evaluation.

set

public void set(java.lang.String value)

Set the value.

Parameters:

value - The value.

See Also:

get()

toString

public java.lang.String toString()

Return the Ptolemy expression in a string.

Overrides:

toString in class java.lang.Object

Returns:

The Ptolemy expression.