ptolemy.actor.ptalon
Class AbstractPtalonEvaluator.PtalonExpressionScope

java.lang.Object
  ptolemy.actor.ptalon.AbstractPtalonEvaluator.PtalonExpressionScope

All Implemented Interfaces:

ParserScope

Enclosing class:

AbstractPtalonEvaluator

protected class AbstractPtalonEvaluator.PtalonExpressionScope
extends java.lang.Object
implements ParserScope

FIXME comment

Field Summary

private java.util.Map<java.lang.String,Token>

_variables A map from variables to Tokens.

Constructor Summary

protected

AbstractPtalonEvaluator.PtalonExpressionScope()

Method Summary

void	addVariable(java.lang.String name, Token value) Add the specified variable with the given value.
Token	get(java.lang.String name) Look up and return the value of the variable or parameter with the specified name in the scope.
Type	getType(java.lang.String name) Look up and return the type of the variable or parameter with the specified name in the scope.
InequalityTerm	getTypeTerm(java.lang.String name) Look up and return the type term for the variable or parameter with the specified name in the scope.
java.util.Set	identifierSet() Return a list of names corresponding to the identifiers defined by this scope.
void	removeVariable(java.lang.String name) Remove the specified variable from this scope.

Methods inherited from class java.lang.Object

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

Field Detail

_variables

private java.util.Map<java.lang.String,Token> _variables

A map from variables to Tokens.

Constructor Detail

AbstractPtalonEvaluator.PtalonExpressionScope

protected AbstractPtalonEvaluator.PtalonExpressionScope()

Method Detail

addVariable

public void addVariable(java.lang.String name,
                        Token value)

Add the specified variable with the given value.

Parameters:

name - The variable name.

value - The variable's value.

get

public Token get(java.lang.String name)
          throws IllegalActionException

Look up and return the value of the variable or parameter with the specified name in the scope. Return null if the name is not defined in this scope.

Specified by:

get in interface ParserScope

Parameters:

name - The name of the variable or parameter.

Returns:

The token associated with the given name in the scope.

Throws:

IllegalActionException - If a value in the scope exists with the given name, but cannot be evaluated.

getType

public Type getType(java.lang.String name)
             throws IllegalActionException

Look up and return the type of the variable or parameter with the specified name in the scope. Return null if the name is not defined in this scope.

Specified by:

getType in interface ParserScope

Parameters:

name - The name of the variable or parameter.

Returns:

The token associated with the given name in the scope.

Throws:

IllegalActionException - If a value in the scope exists with the given name, but cannot be evaluated.

getTypeTerm

public InequalityTerm getTypeTerm(java.lang.String name)
                           throws IllegalActionException

Look up and return the type term for the variable or parameter with the specified name in the scope. Return null if the name is not defined in this scope, or is a constant type.

Specified by:

getTypeTerm in interface ParserScope

Parameters:

name - The name of the variable or parameter.

Returns:

The InequalityTerm associated with the given name in the scope.

Throws:

IllegalActionException - If a value in the scope exists with the given name, but cannot be evaluated.

identifierSet

public java.util.Set identifierSet()
                            throws IllegalActionException

Return a list of names corresponding to the identifiers defined by this scope. If an identifier is returned in this list, then get() and getType() will return a value for the identifier. Note that generally speaking, this list is extremely expensive to compute, and users should avoid calling it. It is primarily used for debugging purposes.

Specified by:

identifierSet in interface ParserScope

Returns:

A set of identifier names.

Throws:

IllegalActionException - If constructing the list causes it.

removeVariable

public void removeVariable(java.lang.String name)

Remove the specified variable from this scope.

Parameters:

name - The name of this variable.